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Home My WebLink About20250707.tiffERO Consultants in Natural Resources and the Environment Burrowing Owl Survey Report P125 Gravel Mine Weld County, Colorado Prepared for Raptor Materials 8120 Gage Street Erie, Colorado 80516 Prepared by ERO Resources Corporation 1626 Cole Boulevard, Suite 100 Lakewood, Colorado 80401 (303) 830-1188 ERO Project #24-180 May 12, 2025 L�yQV I.P-1,0 lt5 szS RECEIVED JUN 2 0 1025 WELD COUNTY COMMISSIONERS c,o17L CDEI mt1/4-1-Pt- /PM TY‘) (fufl I CA<ITT) D1415E) Lef2o[zs to15-. Div7 Denver • Durango • Grand Junction • Idaho www.eroresources.com Burrowing Owl Survey Report P125 Gravel Mine Weld County, Colorado Contents Introduction Project Location. . Ecological Characteristics of the Project Area Methods .. Results .. .... . Conclusions . References Figures Figure 1 Vicinity Map Figure 2 Existing Conditions Appendices Appendix A Photo Log ERO Project #24180 1 3 3 3 5 5 5 2 4 ERO Resources Corporation Burrowing Owl Survey Report P125 Gravel Mine Weld County, Colorado May 12, 2®25 Introduction Raptor Matenals retained ERO Resources Corporation (ERO) to conduct burrowing owl (Athene cuniculana) surveys (project) for the P125 Gravel Mine property south Colorado Highway 66 and west of Weld County Road 17 near Firestone in Weld County, Colorado (project area, Figure 1) ERO conducted a presence/absence burrowing owl survey for the project in spnng 2025 to determine if any owls were present in the project area The burrowing owl is a migratory bird species protected by international treaty under the Migratory Bird Species Act (MBTA) of 1918 (16 United States Code 703-711) The META makes it unlawful to take, possess, buy, sell, purchase, or barter any migratory bird listed in 50 Code of Federal Regulations (CFR) Part 10, including feathers or other parts, nests, eggs, or products, except as allowed by implementing regulations (50 CFR 21) In addition, the burrowing owl has been listed as threatened by Colorado Parks and Wildlife (CPW 2025) The burrowing owl is a small migratory owl that nests in sparsely vegetated areas on the plains, such as prairie dog towns, in eastern Colorado The owl is active during the day and uses abandoned prairie dog burrows for nesting and roosting (Haug, Mi'sap, and Martell 1993) Burrowing owls typically do not occur at sites with vegetation greater than 4 inches high Burrowing owls typically stop nesting in praise dog colonies within one to three years after a colony has been abandoned by prairie dogs (Dechant et al 1999) Burrowing owls are typically present in Colorado between March 15 and October 31 (CPW 2021) Federal and state laws, including the MBTA, prohibit the killing of burrowing owls Inadvertent killing of burrowing owls could occur during prairie dog poisoning, construction, or earthmoving activities To avoid accidental killing of owls, CPW has issued guidelines for conducting clearance surveys in/areas subject to poisoning or construction projects dunng the period from March 15 through October 31 (CPW 2021) This penod coincides with the summer residency period for burrowing owls in Colorado ERO Project #24-180 1 ERO Resources Corporation a COLORADO P125 Gravel Mine, Weld County Section 29, T3N, R67W; 6th PM UTM NAD 83: Zone 13N; 5O7688mE, 4449436mN Longitude 1O4.9O9671°W, Latitude 4O.195283°N USGS Gowanda, CO Quadrangle Weld County, Colorado :minty R ono 26 raniAiRoad Gowan da E -C 0-66.46-4a Lupton Bottom Ditch 4795 ft �, .► , Road 28 Co tm ty Reid 26 Sources: Esri, HERE, Garman, Intermap, increment P Corp., GEBCO, USGS, FAO, NPS, NRCAN, GeoBase, IGN, Kadaster NIL, Ordnance Survey, Esri Japan, METI, Esri China (Hong Kong), (c) OpenStreetMap contributors, and the GIS User Community Copyright® 2013 National Geographic Society, i-cubed 0 750 1,500 feet N A Figure 1 Vicinity Map ?reported for: Raptor Materials File: 24_1$0 Figure 1.mzd (dIHJ July 11, 2024 ERO Resa,rces Corn Portions of this document include intellectual property of ESRI and its licensors and are used herein under license Copyright ® 2024 ESRI and as licensors All rights reserved Burrowing Owl Survey Report P125 Gravel Mine Weld County, Colorado Project Location The project area is south of Colorado Highway 66 and west of Weld County Road 17 near Firestone in Weld County, Colorado (Figure 1) The legal description of the project area is Section 29, Township 3 North, Range 67 West of the 6th Principal Meridian in Weld County, Colorado The UTM coordinates of the approximate center of the project area are NAD 83 Zone 13 North, 507688mE, 4449436mN The longitude/latitude of the project area is 104 909671°W/40 195283°N The elevation of the project area is approximately 4,790 to 4,810 feet above mean sea level Photo points are shown on Figure 2, and photos of the project area are included in Appendix A Ecological Characteristics of the Project Area The project area consists of flood -irrigated alfalfa fields and an organic dairy cattle pasture (Photo 1 and Photo 2, Figure 2) St Vrain Creek is to the northwest but is outside of the project area while an unnamed tributary to St Vrain Creek is between but outside of two portions of the project area The project area is located within the Boulder Creek -Saint Vrain Creek Hydrologic Unit Code (HUC) 10 watersheds of central Colorado Streams generally flow from southwest to northeast out of the foothills and into the South Platte River The South Platte River converges with the North Platte River just west of Ogallala, Nebraska to form the Platte River The Platte River is tributary to the Missouri River, which eventually flows into the Mississippi River Most of the tributaries that flow into the Boulder Creek -Saint Vram Creek HUC 10 watersheds contain riparian corridors dominated by deciduous woodlands and transitional shrubs and grasslands The vegetation in the proje5areas is dominated by alfalfa (Medreogo sotivo), western wheatgrass (Pascopyrum sm►thu), cheatgrass (Bromus tectorum), smooth brome (Bromus mermis), flixweed (Descuromia sophio), squirreltail (Elymus elymordes), little hogweed (Portuloco oleroceo), pigweed (Amaronthus sp ), and kochia (Bossio scoporio) Methods On April 17, April 26, and May 2, 2025, ERO conducted the surveys (2025 surveys) following CPW's recommended Survey Protocol and Actions to Protect Nesting Burrowing Owls (CPW 2021) Active prairie dog colonies were observed in the northern portion of the project area during the 2025 surveys (Figure 2) ERO reviewed aerial imagery of the properties within 0 25 mile of the project area for active and inactive prairie dog towns (Google, Inc 2025) ERO conducted the three 2025 surveys when temperatures were above 40°F and below 80°F and wind speeds were below 12 miles per hour, with no fog or precipitation occurring during the surveys The 2025 surveys consisted of both visual observations and recorded playback of burrowing owl calls from four survey points (Figure 2) ERO Project #24-180 3 ER0 Resources Corporation Esri, HERE, Garmin, (c) OpenStreetMap contributors Source: Esn, Maxar, Earthstar Geographies, and the GIS User Community Burrowing Owl Survey Report- P125 Gravel Mine Weld County, Colorado Results ERO'did nofobserve burrowing owls during any -of the three 2025 surveys of the burrows located in the northern portion of the project area - Conclusions, Burrowing owls were not observed in the'project area during any -of the three 2025 surveys It is possible - ,that owls may occupy the prairie dpg,colonies, but not nest, andthatowls may nest elsewhere but use the project area -for foraging, or they maybe present on a transient basis- These temporary uses would -1 not restrict project activities'as tong as individual birds are not injured or killed by project -related activities -Project activities are unlikelylo,impact burrowing owls in the project area, , References , Colorado Parks and Wildlife 2021 ,Recommended Survey Protocorand Actions to Protect Nesting' Burrowing Owls " ColoradaParks and Wildlife --`. https //cpw state co us/Documents/WildhfeSpecies/LivingWrthWildhfe/Recommended-Survey- Protc col-Burrowing-Qwls pdf - -. - _ r y --- 2025 "Colorado pSting,of Endangered, Threatened and Species of Special Concern " - - https //cpw state co us/threatened-and-endangered-wildlife � , Dechant, J A, M L Sondreal; D H Johnson, LO Igl, C M Goldade, A L Zimmerman, and B. R Euliss 1999 "Effects of;Management Practices on Grassland Birds Ferruginous Hawk" Northern Prairie Wildlife Research -Center, Jamestown, ND , - r Google,-Inc- 2025 "Goggle EarthTfo " Online -database Goggle Earth Pro Version 7 3 3 7786 (64`Bit) 2025 https //earth goggle com%web ~-- - , _ - _ ` Haug, Elizabeth A, B A Milsap, and M `S Martell 1993 "Burrowing'Owl '(Speotyto (unicularia)"Edited by A Poolkand F Gill The Birds of North A`m'erica 61 � - ERO Project #24180 5 ER9 Resources Corporation PHOTO LOG P125 GRAVEL MINE APRIL 17, APRIL 26, MAY 2, 2025 WELD COUNTY, COLORADO Photo 1 - Central prairie dog colony. View is west. %I • t, • ! °A. , ; ire ..y •r 0. It • �. i .�.�L - J t , V -I MF-tom'' J"iC+,,. `; ..� . L i1 • . t`. ' '"B AR :.� ;.•�`'�• _ - - r.44 L �. P�• r.4..- +r:s • N:t�M -4;tY • t.,.. R.sue• • •. tot-. ID Ow c' . -• `'n` • •i s I. ? .yi _ t • �_- _; . • ./ `talltIwo no 4. �J is •--r• y~-si. .- J•-_ , :' '� w • Mti. 1 a4 ,C. , Photo 2 - Northern prairie dog colony. View is north. Jan Warwick From: Sent: To: Subject: Attachments: Jenna Lohmann <Jenna.Lohmann@respec.com> Friday, June 20, 2025 3:52 PM CTB PRE25-0128 - P125 Cogburn Application Addition 05.12.25_BUOW Memo.pdf This Message Is From an External Sender This email was sent by someone outside Weld County Government. Do not click links or open attachments unless you recognize the sender and know the content is safe. Hello, Attached please find the burrowing owl survey, to be added to the existing application for the P125 Cogburn sand and gravel mine. Can you please provide confirmation of receipt? Thank you, Jenna Jenna Lohmann, PE Project Manager u Jenna.Lohmann@respec.com ke 720-775-6427 x1415 Q 303-589-3045 Q 720 S Colorado Blvd, Ste. 410S Denver, Colorado 80246 Confidentiality Notice: This E-mail and any attachments is covered by the Electronic Communications Privacy Act, 18 U.S.C. &2510-2524, is confidential and maybe legally privileged. If you are not the intended recipient, you are hereby notified that any retention, dissemination, or copying of this communication is strictly prohibited. Please reply to the sender that you have received the message in error, and permanently delete the original and destroy any copy, including printed copies of this email and any attachments thereto. 1 Jan Warwick From: Sent: To: Subject: Attachments: Jenna Lohmann <Jenna.Lohmann@respec.com> Friday, June 20, 2025 3:52 PM CTB PRE25-0128 - P125 Cogburn Application Addition 05.12.25_BUOW Memo.pdf This Message Is From an External Sender This email was sent by someone outside Weld County Government. Do not click links or open attachments unless you recognize the sender and know the content is safe. Hello, Attached please find the burrowing owl survey, to be added to the existing application for the P125 Cogburn sand and gravel mine. Can you please provide confirmation of receipt? Thank you, Jenna Jenna Lohmann, PE Project Manager u Jenna.Lohmann@respec.com ke 720-775-6427 x1415 Q 303-589-3045 Q 720 S Colorado Blvd, Ste. 410S Denver, Colorado 80246 Confidentiality Notice: This E-mail and any attachments is covered by the Electronic Communications Privacy Act, 18 U.S.C. &2510-2524, is confidential and maybe legally privileged. If you are not the intended recipient, you are hereby notified that any retention, dissemination, or copying of this communication is strictly prohibited. Please reply to the sender that you have received the message in error, and permanently delete the original and destroy any copy, including printed copies of this email and any attachments thereto. 1 SG COLORADO Division of Reclamation; Mining and Safety Department of Natural Resources NOTICE Consideration of 112c Construction Materials Reclamation Permit Application DATE: March 28, 2025 TO: Weld County Commissioners 1150 O St P.O. Box 758 Greeley, CO 80631 RE: Cogburn Sand, Gravel, and Reservoir Project, File No. M-2025-016 RECEIVE® MAR 2 8 2€25 WELD COUNTY COMMISSIONERS Please be advised that on March 28, 2025, Raptor Materials LLC, whose address and telephone number are 8120 Gage Street, Frederick, CO 80516; (303) 666-6657, filed an application to conduct a(n) Surface mining and reclamation operation, at or near Section 29, Township 3N, Range 67W, 06th Principle Meridian, in Weld County. Please be advised that the permit area may be located in more than one Section, Township, and Range. Affected lands will be reclaimed to support a(n) Developed water resources post -mining land use. The application decision date is scheduled for June 26, 2025. A copy of the application is available for review at the Weld County Clerk & Recorder's office and at the office of the Division of Reclamation, Mining and Safety. The application, as well as all other permit documents, can also be viewed using this link: Link to Imaged Documents by searching M2025016 in the "Permit No" field. A user guide is available to help first time users of the imaged document system and can be viewed using this link: Laserfiche Weblink Guide To be considered in the review process, comments or objections on the application must be submitted in writing within twenty (20) days of the date of the last newspaper public notice. You should contact the applicant for the newspaper publication date. The Office will assume you have no comment or objection to the proposed activity if none are received by the end of the public comment period. If you need additional information or have any questions regarding the above -named application, please contact Joel Renfro at the Division of Reclamation, Mining and Safety, 1313 Sherman Street, Room 215, Denver, CO 80203, by telephone at (720) 812-2002, or by email at Joel.renfro@state.co.us. M -AP -05A Phy3ical Address:1313 Sherman Street, Room 215, Denver, CO 80203 P 303.866.3567 F 303.832.8106 Mailing Address: DRMS Room 215, 1001 E 62nd Ave, Denver, CO 80216 https://drms.colorado.gov Jared S. Polis, Governor I Dan Gibbs, Executive Director I Michael A. Cunningham; Direct.) XO1,44 K1��1�u (sB) zoz6 0'707 1-41,1(755j3!(z5 STATE OF COLORADO DIVISION OF RECLAMATION, MINING AND SAFETY Department of Natural Resources 1313 Sherman St., Room 215 Denver, Colorado 80203 Phone: (303) 866-3567 FAX: (303) 832-8106 RECEIVED MAR 1 1 2025 WELD COUNTY COMMISSIONERS CONSTRUCTION MATERIALS REGULAR (112) OPERATION RECLAMATION PERMIT APPLICATION FORM CHECK ONE: There is a File Number Already Assigned to this Operation Permit # M - - - (Please reference the file number curently assigned to this operation) New Application (Rule 1.4.5) Ell_Amendment Application (Rule 1.10) raL Conversion Application (Rule 1.11) COLORADO DIVISION OF RECLAMATION MINING asta SAFETY 1 PAGE OF DOCUMENT INCLUDED IN PAPER FILE. REMAINDER RETAINED ELECTRONICALLY IN TYLER. Permit # M - - - (provide for Amendments and Conversions of existing permits) The application for a Construction Materials Regular 112 Operation Reclamation Permit contains three major parts: (1) the application form; (2) Exhibits A -S, Addendum 1, any sections of Exhibit 6.5 (Geotechnical Stability Exhibit; and (3) the application fee. When you submit your application, be sure to include one (1) complete signed and notarized ORIGINAL and one (1) copy of the completed application form, two (2) copies of Exhibits A -S, Addendum 1, appropriate sections of 6.5 (Geotechnical Stability Exhibit, and a check for the application fee described under Section (4) below. Exhibits should NOT be bound or in a 3 -ring binder; maps should be folded to 8 1/2" X 11" or 8 1/2" X 14" size. To expedite processing, please provide the information in the format and order described in this form. GENERAL OPERATION INFORMATION Type or print clearly, in the space provided, ALL information requested below. 1 Applicant/operator or company name (name to be used on permit): Raptor Materials LLC 1.1 Type of organization (corporation, partnership, etc.): LLC 2. Operation name (pit, mine or site name): Cogburn Sand, Gravel, and Reservoir Project 3. Permitted acreage (new or existing site): 3.1 Change in acreage (+) 3.2 Total acreage in Permit area 4. Fees: 4.1 4.2 4.4 4.5 New Application New Quarry Application Amendment Fee Conversion to 112 operation (set by statute) 5. Primary commoditie(s) to be mined: sand 5.1 Incidental commoditie(s) to be mined: 1. 3. / lbs/Tons/yr 4. gravel earth products lbs/Tons/yr 2. 196.4 permitted acres acres acres $2,696.00 $3,342.00 $2,229.00 $2,696.00 application fee quarry application amendment fee conversion fee lbs/Tons/yr lbs/Tons/yr 5. / lbs/Tons/yr 5.2 Anticipated end use of primary commoditie(s) to be mined: rural and urban infrastructure needs 5.3 Anticipated end use of incidental commoditie(s) to be mined: " I�ikb I ► c:Rtu i e.u) 3119175 ex): PUDE-I �I Gt'DPri Pi+ 1 ID-DID�.t�5r3�fiPtIEIL)) CCI+I 3 iZiZs 2025-0707 -2- 6 Name of owner of subsurface rights of affected land Raptor Materials LLC If 2 or mole owners, "refer to Exhibit O" 7 Name of owner of surface of affected land Raptor Materials LLC 8 Type of mmmg operation El Surface Undeiground 9 Location Information The center of the area where the majority of nunmg will occur COUNTY Weld PRINCIPAL MERIDIAN (check one) ✓ 6th (Colorado) 10th (New Mexico) M Ute SECTION (write number) S 29 TOWNSHIP (write number and check direction) T 3 El North South RANGE (waste number and check direction) R 67 n East West QUARTER SECTION (check one) E EliE ® SW QUARTER/QUARTER SECTION (check one) d NE NW SE SW GENERAL DESCRIPTION (the number of mules and direction from the nearest town and the approximate elevation) Adjacent northeast of the Town of Firestone, elevation 4770 ft 10 Primary Mme Entrance Location (report in either Latitude/Longitude OR UTM) Latitude/Longitude Example (N) 39° 44' 12 98" (W) 104° 59' 3 87" Latitude (N) deg mm sec (2 decimal places) Longitude (W) deg min sec (2 decimal places) OR Example (N) 39 73691° (W) -104 98449° Latitude (N) 40 18972 Longitude(W) '104 90469 OR Universal Tranverse Mercator (UTM) Example 201336 3 E NAD27 Zone 13 4398351 2 N (5 decimal places) (5 decimal places) UTM Datum (specify NAD27, NAD83 or WGS 84) Nad 83 Zone 13 Eastmg Northing -3- 11 Correspondence Information APPLICANT/OPERATOR (name, address, and phone of name to be used on permit) Bob Haan Contact's Name Company Name Stieet/P O Box City State Telephone Number Fax Number Raptor Matenals LLC Title General Manager 8120 Gage Street Frederick P O Box Colorado Zip Code 80516 (303 ) _ 666-6657 ( )- PERMITTING CONTACT (if different from apphcant/operator above) Contact's Name Quentin Borum Tale Operations Manager Company Name Raptor Materials, LLC Street/P O Box 8120 Gage Street P O Box City - Fredenck State - Colorado Zip Code 80516 Telephone Number (303 ) _ 666-6657 Fax Number ( ) - INSPECTION CONTACT Contact's Name _ Title Company Name Stieet/P O Box P O Box City State Zip Code Telephone Number ( ) - Fax Number ( ) - CC STATE OR FEDERAL LANDOWNER (if any) Agency Street City ' State Zip Code 'Telephone Number ( 1 - CC STATE OR FEDERAL LANDOWNER (if any) Agency Street City State Zip Code Telephone Number 1- -4- 12 Pnmar future (Post -mining) land use (check one) U Cropland(CR) E Pastureland(PL) Rangeland(RL) El Forestry(FR) ErResidenhal(RS) n Recreation(RC) ElDeveloped Water Resomces(WR) 13 Primary present land use (check on, El Cropland(CR) U Pastmeland(PL) El Rangeland(RL) :l Forestry(FR) BResidential(RS) El Recreation(RC) Developed Watei Resources(WR) 1:1 General Agriculture(GA) ElWildlife Habrtat(WL) Industnal/Commercial(IC) ElSolid Waste Disposal(WD) General Agnculture(GA) Wildlife Habitat(WL) Industrial/Commercial(IC) 14 Method of Mmmg Bnefly explain mining method (e g truck/shovel) Surface extraction and transport offsite for processing until bedrock establishment of final basins is complete 15 On Site Processing Crushmg/Screening 13 1 Briefly explain mmmg method (e g truck/shovel) List any designated chemicals or acid -producing matenals to be used or staled withm permit area _ None 16 Description of Amendment or Conversion If you are amending or converting an existmg operation, provide a bnef narrative descnbmg the proposed change(s) - N/A - _ -5 - Maps and Exhibits Two (2) complete, unbound application packages must be submitted One complete application package consists of a signed application form and the set of maps and exhibits referenced below as Exhibits A -S, Addendum 1, and the Geotechmcal Stability Exhibit Each exhibit within the application must be presented as a separate section Begm each exhibit on a new page Pages should be numbered consecutively for ease of reference If separate documents are used as appendices, please reference these by name in the exhibit With each of_the two (2) signed application forms, you must submit a corresponding set of the maps and exhibits as described m the following references to Rule 6 4, 6 5, and 1 6 2(1)(b) EXHIBIT A EXHIBIT B EXHIBIT C EXHIBIT D EXHIBIT E EXHIBIT F EXHIBIT G EXHIBIT H EXHIBIT I EXHIBIT J EXHIBIT K EXHIBIT L -EXHIBIT M EXHIBIT N EXHIBIT O EXHIBIT P EXHIBIT Q EXHIBIT R EXHIBIT S Rule 1 6 2(1)(b) Rule 6 5 Legal Descnption Index Map Pie-Mmmg and Musing Plan Map(s) of Affected Lands Mining Plan Reclamation Plan Reclamation Plan Map Water Information Wildlife Information Soils Information Vegetation Information Climate Information Reclamation Costs Other Permits and Licenses Source of Legal Right -To -Enter Owners of Record of Affected Land (Surface Area) and Owners of Substance to be Mined Municipalities Within Two Miles Proof of Mailing of Notices to County Commissioners and Conservation District Proof of Filing with County Clerk or Recorder Permanent Man -Made Structmes ADDENDUM 1 - Notice Requirements (sample enclosed) Geotechmcal Stability Exhibit (any required sections) The instructions for preparing Exhibits A -S, Addendum 1, and Geotechmcal Stability Exhibit are specified under Rule 6 4 and 6 5 and Rule 1 6 2(1)(b) of the Rules and Regulations If you have any questions on preparing the Exhibits or content of the information requned, or_would like to schedule a pie -application meeting you may contact the Office at 303-866-3567 Responsibihties as a Permittee Upon application approval and permit issuance, this application becomes a legally binding document Therefore, there are a number of important requirements which you, as a permrttee, should fully understand These requirements are listed below Please read and initial each requirement, in the space provided, to acknowledge that you understand your obligations If you do not understand these obligations then please contact this Office for a full explanation p. 1 Your obligation to reclaim the site is not hmited to the amount of the fmancial warranty You assume legal liability for all reasonable expenses which the Board or the Office may incur to reclaim the affected lands associated with your mining operation m the event your permit is revoked and financial warranty is forfeited, 2. The Board may suspend or revoke this permit, or assess a civil penalty, upon a finding that the permittee violated the terms or conditions of this permit, the Act, the Mineral Rules and Regulations, or that information contained in the application or your permit misrepresent important material facts; 3. If your mining and reclamation operations affect areas beyond the boundaries of an approved permit boundary, substantial civil penalties, to you as permittee can result; 4. Any modification to the approved mining and reclamation plan from those described in your approved application requires you to submit a permit modification and obtain approval from the Board or Office; 5. It is your responsibility to notify the Office of any changes in your address or phone number; 6. Upon permit issuance and prior to beginning on -site mining activity, you must post a sign at the entrance of the mine site, which shall be clearly visible from the access road, with the following information (Rule 3.1.12): a, the name of the operator; b. a statement that a reclamation permit for the operation has been issued by the Colorado Mined Land Reclamation Board; and, c the permit number. 7. The boundaries of the permit boundary area must be marked by monuments or other markers that are clearly visible and adequate to delineate such boundaries prior- to site disturbance. 8. It is a provision of this permit that the operations will be conducted in accordance with the terms and conditions listed in your application, as well as with the provisions of the Act and the Construction Material Rules and Regulations in effect at the time the permit is issued. 9. Annually, on the anniversary date of permit issuance, you must submit an annual fee as specified by Statute, and an annual report which includes a map describing the acreage affected and the acreage reclaimed to date (if there are changes from the previous year), any monitoring required by the Reclamation Plan to be submitted annually on the anniversary date of the permit approval. Annual fees are for the previous year a permit is held. For example, a permit with the anniversary date of July 1, 1995, the annual fee is for the period of July 1, 1994 through June 30, 1995. Failure to submit your annual fee and report by the permit anniversary date may result in a civil penalty, revocation of your permit, and forfeiture of your financial warranty. It is your responsibility, as the permittee, to continue to pay your annual fee to the Office until the Board releases you from your total reclamation responsibility. 10. For joint venture/partnership operators: the signing representative is authorized to sign this document and a power of attorney (provided by the partner(s)) authorizing the signature of the representative is attached to this application. -7 - NOTE TO COMMENTORS/OBJECTORS It is likely there will be additions, changes, and deletions to this document pnor to final decision by the Office Therefore, if you have any comments or concerns you must contact the applicant or the Office prior to the decision date so that you will know what changes may have been made to the application document The Office is not allowed to consider comments, unless they are written, and received prior to the end of the public comment period You should contact the apphcant for the final date of the public comment penod If you have questions about the Mined Land Reclamation Board and Office's review and decision or appeals process, you may contact the Office at (303) 866-3567 ' 8 Certification: As an authorized representative of the applicant, I hereby certify that the operation described has met the minimum requirements of the following terms and conditions: 1. To the best of my knowledge, all significant, valuable and permanent man-made structure(s) in existence at the time this application is filed, and located within 200 feet of the proposed affected area have been identified in this application (Section 34-32.5-115(4)(e), C.R.S.). 2. No mining operation will be located on lands where such operations are prohibited by law (Section 34-32.5-115(4)(f), C.R.S.; 3. As the applicant/operator, I do not have any extraction/exploration operations in the State of Colorado currently in violation of the provisions of the Colorado Land Reclamation Act for the Extraction of Construction Materials (Section 34-32.5-120, C.R.S.) as determined through a Board finding. 4. I understand that statements in the application are being made under penalty of perjury and that false statements made herein are punishable as a Class 1 misdemeanor pursuant to Section 18-8-503, C.R.S. This form has been approved by the Mined Land Reclamation Board pursuant to section 34-32.5-112,C.R.S., of the Colorado Land Reclamation Act for the Extraction of Construction Materials. Any alteration or modification of this form shall result in voiding any permit issued on the altered or modified form and subject the operator to cease and desist orders and civil penalties for operating without a permit pursuant to section 34-32.5-123, C.R.S. Signed and dated this II t-tiday of frc �, Zv2 r g fresh( a -W. sit ($ L Applicant/Operator or Company Name Signed: �i�-- Title: General Manager State of CO O rant O ) County of ULitiCA ) ss. If Corporation Attest (Seal) The foregoiut instrument was acknowledged before me this day of 2.02- 7 , by St eurre 'tat- VOL. V ✓ e‘ as _t►tie ra.Q MGtacttriv- of Rato+or Ma-A-tins Os L. L C Signed: Corporate Secretary or Equivalent Town/City/County Clerk JESSICA HOOVER NOTARY PUBLIC STATE OF COLORADO NOTARY ID 20044035571 MY COMMISSION EXPIRES OCTOBER 08, 2028 rna.rc.l.. N'ary Public My Commission expires: (2O I �2 SIGNATURES MUST BE IN BLUE INK You must post sufficient Notices at the location of the proposed mine site to clearly identify the site as the location of a proposed mining operation. The following is a sample of the Notice required for Rule 1.6.2(1)(b) that you may wish to use. NOTICE This site is the location of a proposed construction materials operation. (Name of the Applicant/Operator) Raptor Materials LLC whose address and phone number is (Address and Phone Number of the Applicant/Operator) 8120 Gage St, Frederick, CO/303-666-6657 has applied for a Reclamation Permit with the Colorado Mined Land Reclamation Board. Anyone wishing to comment on the application may view the application at the (County Name) WeCounty Clerk and Recorder's Office, (Clerk and Recorder's Office Address) 1150 O St, Greeley, CO 80632 , and should send comments prior to the end of the public comment period to the Division of Reclamation, Mining, and Safety, 1313 Sherman St, Room 215, Denver, Colorado 80203. Certification: I Garrett Varra hereby certify that I posted a sign containing the above notice for the proposed Cogbum Sand, Gravel, and Reservoir Project 3/6/2025 permit area known as the (Name of Operation) , on (Date Posted) • dnini‘take- S I GNATURE 3/‘,/20 2 S' DATE NOTICE OF FILING APPLICATION FOR COLORADO MINED LAND RECLAMATION PERMIT FOR REGULAR (112) CONSTRUCTION MATERIALS EXTRACTION OPERATION NOTICE TO THE BOARD OF COUNTY COMMISSIONERS Weld COUNTY Raptor Matenals LLC (the "Applicant/Operator") has applied for Regular (112) reclamation permit from the Colorado Mined Land Reclamation Board (the "Board") to conduct the extraction of construction matenals operations in Weld County The attached information is being provided to notify you of the location and nature of the proposed operation The entire application is on file with the Division of Reclamation, Mmmg, and Safety (the "Division") and the local county clerk and recorder The applicant/operator proposes to reclaim the affected land to developed water resources use Pursuant to Section 34-32 5-116(4)(m), C R S , the Board may confer with the local Board of County Commissioners before approving of the post -mining land use Accordingly, the Board would appreciate your comments on the proposed operation Please note that, in order to preserve your right to a hearing before the Board on this application, you must submit written comments on the application within twenty (20) days of the date of last publication of notice pursuant to Section 34-32 5-112(10), C R S If you would like to discuss the proposed post -mining land use, or any other issue regardmg this application, please contact the Division of Reclamation, Mmmg; and Safety, 1313 Sherman Street, Room 215, Denver, Colorado 80203, (303) 866-3567 NOTE TO APPLICANT/OPERATOR You must attach a copy of the application form to this notice If this is a notice of a change to a previously filed application you must either attach a copy of the changes, or attach a complete and accurate description of the change NOTICE OF FILING APPLICATION FOR COLORADO MINED LAND RECLAMATION PERMIT FOR REGULAR (112) CONSTRUCTION MATERIALS EXTRACTION OPERATION NOTICE TO THE BOARD OF SUPERVISORS OF THE LOCAL CONSERVATION DISTRICT Longmont Conservation DISTRICT Raptor Matenals LLC (the "Applicant/Operator") has applied for a Regular (112) reclamation penmt from the Colorado Mined Land Reclamation Board (the "Board") to conduct the extraction of construction materials operations m Weld - County The attached information is being provided to notify you of the location and nature of the proposed operation The entire apphcation is on file with the Division of Reclamation, Mmmg, and Safety (the "Division") and the local county clerk and recorder The applicant/operator proposes to reclaim the affected land to developed water resources use Pursuant to Section 34-32 5-116(4)(m), C R S , the Board may confer with the local Conservation Districts before approvmg of the post-mrmng land use Accordingly, the Board would appreciate your comments on the proposed operation Please note that, in order to preserve your right to a hearmg before the Board on this application, you must submit written comments on the application within twenty (20) days of the date of last publication of notice pursuant to Section 34-32 5-112(10), C R S If you would like to discuss the proposed post -musing land use, or any other issue regarding this application, please contact the Division of Reclamation, Muung, and Safety, 1313 Sherman Street, Room 215, Denver, Colorado 80203, (303) 866-3567 NOTE TO APPLICANT/OPERATOR You must attach a copy of the application form to this notice If this is a notice of a change to a previously' filed application you must either attach a copy of the changes, or attach a complete and accurate description of the change AN EXAMPLE PUBLIC NOTICE WHICH MEETS THE REQUIREMENTS OF THE STATUTES IS SHOWN BELOW THE BLANKS WHICH REQUIRE DATES _WILL NEED TO BE FILLED IN ACCORDING TO THE FOLLOWING INSTRUCTIONS PLEASE READ CAREFULLY PUBLICATION INSTRUCTIONS Date of commencement and date of completion should represent the dates which you feel most accurately describe the hfe of the operation For all Regular (112) types of operations, this notice must be published once a week for four (4) consecutive weeks, starting within ten (10) days of the date the application is considered to be submitted to -the Division The final date for receiving comments is the 20th day after the fourth publication or the next regular busmess day All notices must be published in a newspaper of general circulation in the locality of the proposed numng operation and mailed to the landowners as set forth in the Colorado Mined Land Reclamation Rules and Regulations Since the date for consideration of your application may change, DO NOT include it in this notice For a complete discussion of the notice procedures and objections, please refer to C R S 34-32 5-112(10), 114 and 115 *******************************************************************************************.********* ***** PUBLIC NOTICE (Operator Name) Raptor Materials LLC , (Address and Phone Number) 8120 Gage St, Frederick, CO/303-666-6657 has filed an application for a Regular (112) Construction Materials Operation Reclamation Permit with the Colorado Mined Land Reclamation Board under provisions of the Colorado Land Reclamation Act for the Extraction of Construction Matenals The proposed mine is known as the (Name of the Mine) cogburn Sand, Gravel, and Reservoir Protect , and is located at or near Section 29 - , Township 3 , Range 67 , 6th Pnme Meridian The proposed date of commencement is December , 2025 , and the proposed date of completion is December , 2039 The proposed future use of the land is (Future Landuse) reservoir Additional information and tentative decision date may be obtained from the Division of Reclamation, Mimng, and Safety, 1313 Sherman Street, Room 215, Denver, Coloiado 80203, (303) 866-3567, or at the (County Name) Weld County Clerk and Recorder's office, (Clerk and Recorder's Address) 1150 o St, Greeley, CO 80632 , or the above -named applicant Comments must be in writmg and must be received by the Division of Reclamation, Mining, and Safety by 4 00 p m on (Fmal Date for Comments) Please note that under the provisions of C R S 34-32 5-101 et s_g Comments related to noise, truck traffic, hours of operation, visual impacts, effects on property values and other social or economic concerns are issues not subject to this Office's jurisdiction These subjects, and similar ones, are typically addressed by your local governments, rather than the Division of Reclamation, Mining, and Safety or the Mzned Land Reclamation Board M \mmisha a\vsforms\07-07-01 vsforms\Construction 112 doc 07/24/2007) An example Structure Agreement which meets the requirements of the Statutes is shown below ****************************************************************.******************** Structure Agreement This letter has been provided to you as the owner of a structure on or within two hundred (200) feet of a proposed mine site The State of Colorado, Division of Reclamation, Mining and Safety ("Division") requires that where a mining operation will adversely affect the stability of any significant, valuable and permanent man-made structure located within two hundred (200) feet of the affected land, the Applicant shall either a) Provide a notanzed agreement between the Applicant and the Person(s) havmg an mterest m the structure, that the Applicant is to provide compensation for any damage to the structure, or b) Where such an agreement cannot be reached, the Applicant shall provide an appropnate engineering evaluation that demonstrates that such structure shall not be damaged by activities occurrmg at the mining operation, or c) Where such structure is a utility, the Applicant may supply a notarized letter, on utility letterhead, from the owner(s) of the utility that the mining and reclamation activities, as proposed, will have "no negative effect" on their utility ( Construction Materials Rule 6 3 12 and Rule 6 419 & Hard Rock/Metal Mining Rule 6 3 12 and Rule 6 4 20) The Colorado Maned Land Reclamation Board ("Board') has determined that this form, zf properly executed, represents an agreement that complies with Construction Materials Rule 6 3 12(a), Rule 6 419(a), and C R S § 34-32 5-115(4)(e) and with Hard Rock/Metal Mining Rule 6 312(a), Rule 6 4 20(a), and C R S § 34-32-115(4)(d) This form zs for the sole purpose of ensuring compliance with the Rules and Regulations and shall not make the Board or Division a necessary party to any private cavil lawsuit to enforce the terms of the agreement or create any enforcement obligations in the Board or the Division The following structures are located on or within 200 feet of the proposed affected area: 1 2 3 4 5 (Please list additional structures on a separate page) CERTIFICATION The Applicant, Raptor Materials LLC (pant applicant/company name), byGarrett Varra (print representative's name), as General Manager (pant representative's title), does hereby certify that (structure owner) shall be compensated for any damage from the proposed mimng operation to the above listed structure(s) located on or within 200 feet of the proposed affected area described within Exhibit A, of the Reclamation Permit Application for Cogburn Sand, Gravel, and Reservoir Project (operation name), File Number M - Thus form has been approved by the Colorado Mined Land Reclamation Board pursuant to its authority under the Colorado Land Reclamatuon Act for the Extraction of Construction Materials and the Colorado Mined Land Reclamation Act for Hard Rock, Metal, and Designated Mining Operations. Any alteration or modification to this form shall result in voidung this form. NOTARY FOR PERMIT APPLICANT ACKNOWLEGED BY Apphcant Representative Name Date Title STATE OF ) ) ss COUNTY OF ) The foregoing was acknowledged before me this day of , 20, by as of My Commission Expires Notary Pubhc NOTARY FOR STRUCTURE OWNER ACKNOWLEGED BY Structure Owner Date Name Title STATE OF ) ss COUNTY OF The foregoing was acknowledged before me this day of , 20_, by as of My Commission Expires Notary Public //PAGE 1 EXHIBIT A EXHIBIT A -LEGAL DESCRIPTION SECTION 1 The legal description must identify the affected land, specify affected areas and be adequate to field locate the property. Description shall be by (a), township, range, and section, to at least the nearest quarter -quarter section and (b), location of the main entrance to the site reported as latitude and longitude, or the Universal Transverse Mercator (UTM) Grid as determined from a USGS topographic map. A metes and bounds survey description is acceptable in lieu of township, range, and section. Where available, the street address or lot number(s) shall be given. This information may be available from the County Assessor's Office or U.S. Geological Survey (USGS) maps. All 'ands located within the permit boundary which may be affected include those parcels located in parts of E/2SE/4, NW/4SE/4, SW/4NE/4, and the SE/4NW/4, Section 29, Township 3 North, Range 67 West, all in the 6th P.M.; Weld County, Colorado, and comprising 196.4± acres, more or less as determined by Lat 40°, Inc. Professional Land Surveyors, Greeley, CO. SECTION 2 The main entrance to the mine site shall be located based on a USGS topographic map showing latitude and longitude or Universal Transverse Mercator (UTM). The operator will need to specify coordinates of latitude and longitude in degrees, minutes and seconds or in decimal degrees to an accuracy of at least five (5) decimal places (e.g., latitude 37.12345 N, longitude 104.45678 W). For UTM, the operator will need to specify North American Datum (NAD) 1927, NAD1983, or WGS 84, and the applicable zone, measured in meters. The mine entrance is identified on Exhibit C-2: Extraction Plan Map, and located as identified under NAD 83 Colorado State Plane North Zone: Lat/Long for ALL Fields: Northeast Entrance: Southeast Entrance: Latitude (N) 40.19679, Longitude (W) -104.90449 Latitude (N) 40.18972, Longitude (W) -104.90469 Raptor Materials, LLC Cogburn Sand, Gravel, and Reservoir Project February 2025 A REGULAR IMPACT H121 CONSTRUCTION PERMIT APPLICATION - COLORADO DIVISION OF RECLAMATION MINING AND SAFETY, OFFICE OF MINED LAND RECLAMATION REgpEC //PAGE 1 EXHIBIT B EXHIBIT B -INDEX MAP SECTION 1 An index map showing the regional location of the affected land and all roads and other access to the area. A standard U.S. Geological Survey topographic quadrangle or equivalent is acceptable. Scale criteria need not be followed for this map. The Grandview \..,Estates A�ead)-�-- J J VICINITY MAP SCALE - r=2000' LEGEND GIS PARCEL LIMES SUBJECT PROPERTY The index map was created with the U.S. Geological Survey topographic quadrangle for Gowanda, Colorado. Raptor Materials, LLC Cogburn Sand, Gravel, and Reservoir Project February 2025 A REGULAR IMPACT (1121 CONSTRUCTION PERMIT APPLICATION - COLORADO DIVISION OF RECLAMATION MINING AND SAFETY, OFFICE OF MINED LAND RECLAMATION REgpEC // PAGE 1 EXHIBIT EXHIBIT D - EXTRACTION PLAN The mining plan shall supply the following information, correlated with the affected lands, map(s) and timetables: SECTION [Al • (a) description of the method(s) of mining to be employed in each stage of the operation as related to any surface disturbance on affected lands; Resource recovery will commence by first removing the upper [A profile/plow layer] six to twelve inches of soil [six (6.0±) inches typical], combined with existing grass or crop stubble. Removal will utilize scrapers or excavators, aided by dozers where necessary, and hauled to the northern corner of P125A. All extraction and surface related activities detailed in this application will occur under an approved Fugitive Dust Permit issued by the Colorado Department of Public Health and Environment (CDPHE). Until re -soiling activity occurs, where harvested soils have been stockpiled and remain undisturbed for reclamation or sale, they will be seeded with the mixture specified under Exhibit L - Table L: Primary/Preferred Revegetation Seed Mixture. A stabilizing cover of native vegetation may take up to three years to fully establish the desired cover. In the event the native seed mixture fails, an optional mixture of predominantly introduced species will be used as a fall back to better assure a stabilizing cover of vegetation. Still, using the preferred native seed mixture offers opportunity to gauge the potential performance of the selected species prior to utilizing it over larger areas requiring reclamation later in the life of the resource recovery operation. Once vegetation is established over the initial reclamation soil stockpiles, they will likely remain untouched until all other resources have been extracted within Pit P125A; at that time, stockpiled topsoil will be placed on designated reclaimed areas or moved to the southeastern corner of Pit 125A. Where concurrent reclamation is possible, operations will utilize soil in an over the shoulder method when practical. In this manner, reclamation is expedited without increasing soil stockpile volumes while recucing expenditures related to labor, handling, and time. Soil salvaged as stated above is expected to exist in -situ at six to twelve inches in thickness. Resulting volames of salvaged soil will range from 8,400 - 16,800 cubic yards for Pit P125_S1, from 17,800 - 35,600 cubic yards for pit P125A, and from 22,800 — 45,500 cubic yards for pit P125B. Salvaged soil will generally be stockpiled in the northern corner of Pit P125A. Smaller short-term stockpiles may be created along pit edges where regrading is imminent or in progress and re -soiling will follow. Re -soiling volumes required above the waterline of the lined water storage will require much less soil. The re -roiling areas are estimated at 4.6 acres for Pit P125A and 5.7 acres for Pit P125B with volumes calculated based on a nominal six inches of soil cover at 3,703 and 4,601 cubic yards, respectively. Topsoil salvaged from Pit P125 S1 will be sufficient to re -soil the area once the pit is backfilled to approximately existing grade. Excess soil not needed on site may be sold. Following soil salvage, the balance of the extractable deposit wi_II be removed to the depth of the unconsolidated or weathered bedrock using excavators and trucks, with the excavated sand and gravel material transported offsite by conveyor to the plant site pit run located on the northeast adjacent P115 Kurtz site (M1999-006), and subsequently processed by screening, crushing, washing, and other methods to size and properly dimension the extracted material into saleable product. Resource recovery will commence from the southwest corner of pit P125_S1, establishing a keyway moving north and east, and then moving northeastward via an advancing face. The planned first discharge point is shown on Exhibit Map C-2 from the northwest corner- of pit P125_S1 to the Last Chance Ditch. Raptor Materials, LLC Cogburn Sand, Gravel, and Reservoir Project February 2025 A REGULAR IMPACT (112) CONSTRUCTION PERMIT APPLICATION - COLORADO DIVISION OF RECLAMATION MINING AND SAFETY, OFFICE OF MINED LAND RECLAMATION //PAGE 2 EXHIBIT 0 Pit P125_51 has a tank battery located at its southeastern border; extraction will not occur within 25 feet of _hese tanks while this infrastructure is still in place. An underground oil and gas pipeline is located be:ween Pits P125_S1 and P125A; extraction will not occur within 10 feet of the pipeline easement while the pipeline is in place. Finally, one abandoned oil and gas well each (two total) is located within the extraction extents of Pits P125A and P125B, both of which are pending removal (refer to map Exhibit C-1 for ownership details); extraction will not occur within 25 feet of the wells before they are removed. Perimeter Keyway Extraction will maintain a perimeter slope no steeper than 1.25H:1 V. Where pit depths exceed 30 feet below ground surface (bgs), extracted final walls will be lined to 25 feet bgs as soon after extraction as practically possible and backfilled at slopes no steeper than 3H:1V for depths 30 feet bgs and greater (refer to addendum: Slope Stability Analysis for additional information). At the toe of the cut perimeter slope is the keyway that runs below the extracted deposit of the basin, into the bedrock, which allows the subsurface waters to flow to the settling basin and discharge pumps necessary to keep the cut basin dry during a time of extraction and reclamation of the affected perimeter slopes. The keyway dimensions may vary more or less from 4± to 8± feet in depth and 4± to 16± feet in width. Extraction must be broad enough to allow equipment to safely approach the toe and excise the bed dimensions where the resulting channel is sufficient to convey the groundwaters to the settling basin for discharge. Please Note: The graphic representation of the Initial Extraction Area and the topsoil stockpile location in Map Exhibit C-2 are idealized, and may vary in shape, size, and location presented. Annual Reports will report on the nature and extent of affected lands and more properly reflect actual conditions on the ground in a given year of operations. During extraction, a predominantly vertical advancing pit wall (the extraction front) is not anticipated due to the use of excavators in the removal of the material deposits. Excavators provide a great deal of control over the extraction process. The maximum length of the extraction front will likely never exceed the maximum cross-sectional length of Pit P125B, or 2,000± feet, or less; in any given direction. The advancing front will result in a moving face with a slope typically equal to or flatter than 1.25H:1 V, and commonly not greater than 1.25H:1 V along the perimeter of the extraction limits to depth. Acreage to be affected during the first year of extraction activities includes the establishment of the Initial Areas of Extraction (P125_S1) and attending settling pond and means of transportation by ground haulage. The Initial Area of Extraction will expand until concurrent reclamation follows as each Pit is exhausted of resource. Although initial extraction may otherwise result in temporary slopes up to 1.25H:1 V, all cut slopes will be backfilled with unconsolidated bedrock, overburden (on -site unmerchantable excess materials, or imported inert materials) and soil to advance the reclamation and completion of the desired basins. Pit P125_S1 is planned to be completely backfilled with fill and topsoil placement expected to be completed 1- 2 years after extraction in this pit is complete. It is currently anticipated that the fill material will come from excess material currently available on the adjacent Raptor Materials Kurtz operation (DRMS permit M1999- 006). Concurrent backfilling and grading of cut perimeter slopes, while desirable, may be obstructed in time and extant by the need to maintain keyways and basin discharge during extraction. Backfilling of slopes can only occur once enough of the floor is exposed to facilitate backfilling and finished grade of extracted basin slopes without interfering with basin discharge operations. This makes concurrent backfill difficult to accurately forecast. Regardless, any completed slope remediation will be indicated in any subsequent DRMS Annual Report. Raptor Materials, LLC Cogburn Sand, Gravel, and Reservoir Project February 2025 A REGULAR IMPACT [1121 CONSTRUCTION PERMIT APPLICATION - COLORADO DIVISION OF RECLAMATION MINING AND SAFETY, OFFICE OF MINED LAND RECLAMATION REgpEc // PAGE 3 EXHIBIT D No plant or processing operations will be installed or occur on this site. Pit -run (unprocessed materials) will be loaded onto a conveyor on the east side of Pit 125A that will deliver material to the existing north -south ccnveyor along the east side of Weld County Road 17, which will convey material to be processed at the existing P115 Kurtz plant. Extracted materials from Pit P125B will likewise be loaded onto a conveyor that wi 1 tie into the Pit P125A conveyor for offsite transport. Processed material will then be transported directly from the plant to area markets as needed and where appropriate. The conveyor will be a short transfer belt to convey extracted sand and gravel over WCR 17 to the existing conveyor on the adjacent Kurtz operation (DRMS Permit 1999-006). The conveyor will be set on an elevated structure at appropriate heights to enable access to pipeline in easements and required clearance (18 -feet) over the county road. The conveyor will be supported by legs at intervals of approximately 40 feet with typically 6- x 2- x 2 -foot concrete blocks sitting on ground surface used as necessary to anchor the legs. The conveyor between Pits P125B and P125A will span the Last Chance Ditch and metal (or other appropriate material) pans will be installed under the conveyor structure to prevent spillage into the ditch or onto the county road. The design will be similar to other Raptor locations where an extended span has been required to cross a county road. Final conveyor specifications are to be determined however belt width is anticipated in the range 30-54". Extracted material will be loaded immediately onto the conveyor for offsite transport; therefore, only a limited amount of temporary material stockpiles is expected onsite as part of logistics for offsite transport. Raptor will minimize of impacts to mule deer population in the riparian corridor along the St. Vrain Creek during construction of the project and during winter. While no current extraction is proposed in the riparian corridor, Raptor commits to construction activities will only be conducted during daylight hours and to not leaving open trenches or pits during construction that could result in harm to animals. Plant placement will assure that plant noise is well below that of the nearby traffic. Relative to noise, traffic travelling on area roads at 55 mph or above is approximately 70.0± decibels within 100 feet from the centerline of the Highway. Noise at ground zero at a cone crusher, as measured by a hand-held meter, is at 80.0± decibels, dropping to 70.0± decibels at 100.0± feet from the center. Backup sirens and heavy equipment averaged 60.0± to 75± decibels. The level drops an additional 5.0± decibels for every 100.0± feet from the source of plant noise, achieving residential background levels at a total setback of 400± feet. Noise levels at areas of extraction are buffered with increasing depth of ex Fraction. SECTION (B) (b) earthmoving; General earthmoving including topsoil, overburden and sand and gravel is described in Section (a) above. Material transport of raw materials from extraction locations to the plant site (located on adjacent Raptor Materials Kurtz property, DRMS permit number M1999-006) will occur via conveyor (see route on Exhibit C-2: Extraction Plan Map). This will in turn serve to minimize impacts to area transportation corridors. The acual location, extent, and nature of the conveyor systems not otherwise designated in this submittal will be provided as updates in the required DRMS Annual Reports. SECTION (C) (c) all water d'i'versions and impoundments; and RAPTOR MAT ERIALSuc Raptor Materials, LLC Cogburn Sand, Gravel, and Reservoir Project February 2025 A REGULAR IMPACT [112) CONSTRUCTION PERMIT APPLICATION - COLORADO DIVISION OF RECLAMATION MINING AND SAFETY, OFFICE OF MINED LAND RECLAMATION // PAGE 4 EXHIBIT 0 To determine the influence of past activities on groundwater, six (6) piezometer wells were advanced and developed along and within the entire Cogburn site boundary. Groundwater level information is based on three quarters of continuous monthly measurements at these piezometers, whose locations are identified on map Exhibit G: Water Information Map. Recorded groundwater depths vary in elevation below the surface, ranging from an average of approximately 23.5± feet bgs in the southeastern portion of the property to 8.5± feet bgs in the northwestern portion. Groundwater elevations are influenced by crop irrigation practices that run generally from April through September and may occasionally lag into the middle of October. During this time groundwater depths may be skewed higher in elevation in Pits P125_S1, P125A, and the eastern portion of P125B; however, throughout the 2024 monitoring period, groundwater elevations over the entire site have remained deeper than 7.0± feet from the surface. Using the approximate surface elevations at the eastern boundaries of Pits P125A (4,800') and P125B (4,790'), and noting that groundwater monitoring results have reported depths between 14-16 feet bgs in the northern corner of P125A and vary between 7-9 feet bgs along the eastern boundary of P125B, we have estimated static water levels of 4,785' in Pit P125A and 4,782' in Pit P125B. The cyan colored contours shown in the map Exhibit G: Water Information represent the static groundwater elevation in each reclaimed pit. Since completed reservoirs will be lined to meet State of Colorado Water Resources specifications and requirements, and since lined basins will ultimately equalize with the surrounding groundwater elevations, the static water levels shown should reasonably reflect those of both the lined or unlined state, and represent a proper reflection of the optimal surface area of the water over the finished basins. Raptor Materials, LLC has sufficient water to meet the circumstances and obligations of both the lined and unlined states and, as reflected in Exhibit G: Water Resources Information, until and unless the reservoirs have an approved liner, the Operator will dedicate sufficient waters to secure the reclamation of the resulting basins in the unlined state. As extraction activity progresses into the aggregate profile, groundwater must generally be removed in advance through the use of pumps and subsequent discharge into area tributaries. A complete dewatering evaluation was performed by AWES in their report dated October 2024, and is included as an addendum to this permit application. The report concludes that the results of analytical and numerical solutions indicate that the proposed mine dewatering activities will not adversely affect the regional groundwater hydrology'. All discharge of waters will be conducted under an approved CDPHE discharge permit. Initial dewatering of the property in preparation for extraction and resource recovery will occur by establishment of a dewatering pump and/or well in the northwestern corner (low point) of Pit P125_S1 and discharged to an adjacent settling pond prior to eventual release into the Last Chance Ditch. The point of discharge and settling pond location are on Exhibit C2: Extraction Plan Map. Preliminary discharge locations from Pits P125A and P125B are also identified on this map; these locations may change and additional locations may need to be added or field fit as operations advance. All discharge will conform to the applicable CDPHE discharge permit requirements, and locations will be updated in the following DRMS Annual Report. Cut slopes will cause direct precipitation to drain internally into the resulting basins and are not anticipated to result in any off -site impacts due to erosion or stormwater runoff. The gentle to near flat topography of the area landscape tends to aid in overall stability above the planned areas of extraction. While some erosion of resulting basin perimeter slopes will be evident subsequent to extraction, the advance of reclamation activity over affected lands will provide cover for both near and long-term stability of those lands remaining above water level of the finished basins. All completed slopes above the anticipated static groundwater elevation will be soiled, seeded and stabilized as provided for under Exhibit E - Reclamation Plan. RAPTOR MATERIALSuc Raptor Materials, LLC Cogburn Sand, Gravel, and Reservoir Project February 2025 A REGULAR IMPACT (1121 CONSTRUCTION PERMIT APPLICATION - COLORADO DIVISION OF RECLAMATION MINING AND SAFETY, OFFICE OF MINED LAND RECLAMATION R ESpE C //PAGE 5 EXHIBIT 0 Of the total 70.8 acres of potential extraction (e.g., the full eventual extents of P125_S1, P125A, and P125B), the resulting basins will function as multiple -use reservoirs with a slightly fluctuating combined water surface area covering 45.5 acres. Of the remaining balance of 25.3± acres of land above the amicipated high-water mark of the reservoirs, 10.4 acres of disturbed at -grade backfill, not otherwise coenmitted to existing or planned structures or infrastructure over Pit P125_S1, will be stabilized with vegetation; the remaining 14.9 acres of basin slopes in Pits P125A and P125B will be stabilized with vegetation. Extraction will form a depression (basin) within the floodplain as shown in Exhibit C-2: Extraction Plan Map. Temporary above ground fill will be avoided but may occur within the floodplain, and as part of this permitted activity, provided the above ground volume does not exceed the below ground volume created by extraction. Such temporary fill could include topsoil, backfill or liner material placed for short durations pending placement in a final location. The floodplain extent will be visually marked in the field to better assure the integrity of the floodplain. SECTION [Dl (d) the size of area(s) to be worked at any one time. The 196.4 -acre parcel boundary forms the permit boundary, as reflected on exhibit maps. All lands under its direct control within the 196.4 -acre permit area, are affected lands under C.R.S. 34-32.5-103(1), respective of this permit application. As a result, any changes required in the nature of planned extraction or reclamation will be made only through the Division of Reclamation, Milling and Safety (DBMS), by Technical Revision only. If lands are needed beyond the designated permit boundary, those lands will be secured for the active OMLR permit by Amendment. Within the permit boundary, there are three* (3) identifiable areas designated for primary extraction, the description of which will help to explain the nature of planned extraction and reclamation. The Primary Areas of Extraction are as follows: 10.4_Acres = Primary Extraction Pit P125_S1 - South Pit 22.1 Acres = Primary Extraction Pit P125A— Eastern Pit 28.2 Acres = Primary Extraction Pit P125B — Central Pit 60.7 Acres = Total Primary Extraction 135.7 Acres = Affected Lands beyond planned extraction limits 196.4 Acres TOTAL Of the outlying 135.7 Acres: 41.3Acres = Mineral Reserve Area The extraction limits assure through the use of setbacks that other interests are not affected by planned extraction. Extraction is set back uniformly at a minimum 10.0± feet from the edge of property lines; easements and rights -of -way; underground gas lines or other underground facilities, irrigation ditches and seep ditch, wells and other structures. Minor variations may occur in the field over time from those represented on Exhibit Maps. The plans detailed in this application are based upon future events for which minor or temporary departures at any point in time may be evident. To the extent any significant departure in the field occurs in a time and manner not otherwise anticipated in these exhibits, the operator may cure by self -inspection, by observation from DRMS inspection in a timely manner, or by operator -initiated Revision to the Permit or otherwise via clarification in attending required OMLR Annual Reports. RAPTOR MATERIALSuc Raptor Materials, LLC Cogburn Sand, Gravel, and Reservoir Project February 2025 A REGULAR IMPACT (112) CONSTRUCTION PERMIT APPLICATION - COLORADO DIVISION OF RECLAMATION MINING AND SAFETY, OFFICE OF MINED LAND RECLAMATION // PAGE 6 EXHIBIT D Extraction will not occur closer than 125± feet from the face of a residential structure; unless there is a written accommodation with the owner of the residential structure that allows extraction to occur within a closer stated limit. Extraction will occur no closer than 25± feet from well heads and related above ground facilities. Extraction around well heads will be concurrently backfilled to maintain a 100± foot buffer from the balance of extracted lands. At all times, safety will take precedent and override all other conditions in time with a matter of safety or emergency respective to any and all aspects of the approved permit. The DRMS issued a Floodplain Protection Standard in February 2024 based largely on Mile High Flood District guidelines. Raptor has per DRMS suggestion decided to adopt the 400 -foot setback from the top of the riverbanks to the top of the pit -side slope based on the standard. Raptor Materials intends after permit approval to present the results of the ongoing engineering evaluation of options discussed in the standard as a Technical Revision to obtain relief from what we are confident are very conservative setbacks. In addition to the three above -mentioned pits, a Mineral Reserve Area is located between pit P125B and the Saint Vrain River, identified as P125C on Map Exhibit C-2. The western portion of Pit P125B, within the 400 -ft setback from the unnamed tributary that traverses the site, is also identified as a Mineral Reserve Area. These areas are indicated in this permit application as potential areas of future extraction, which will not occur until and unless identified, detailed, and approved, under separate technical revision to the permit. • 31.2 Acres - West Pit • 10.1 Acres - Western Portion of Central Pit Extraction will not occur within the Mineral Reserve Areas until and unless identified, detailed, and approval is obtained under a separate technical revision to the DRMS permit. The Mineral Reserve Areas consist primarily of floodplain setbacks from St. Vrain Creek and an unnamed stream including also an area of potentially jurisdictional wetlands. The remaining 94.4 acres of lands within the permitted limits may comprise planned or existing permanent access roads, levees, previously affected areas, and areas of minor to no disturbance (including public transportation corridors, rights -of -way, easements, permanent structures, river and stream terrace and cottonwood corridor buffer areas), or other farm features or structures; or as otherwise determined from included maps and aerials. These lands may also include essential support operations, including: parked vehicles, equipment, stockpiles, etc., not otherwise explicitly indicated or shown, but reasonably associated with operations of like kind, and may be varied in location and extent over time; or otherwise, field fit within the permit boundary as warranted. A complete schedule of exposed and reclaimed areas is provided in Table E-1 in Exhibit E: Reclamation Plan. With the relatively small pits, Raptor would prefer a steady sequential advance through the initial pits P125_S1 and P125A but for operational flexibility requires the ability to have up to three active mining areas (area of active extraction operations) of up to 16 acres to be in production simultaneously for an anticipated maximum active mining area of 48 acres. The flexibility to operate in up to three active mining areas allows for management of the resource in response to market demands, coordinating operations around existing infrastructure, water management, to ensure safe operations, or due to seasonal restrictions if required to minimize impacts to wildlife. The maximum disturbed area will continue to grow over the life of the operation as the post mining land use is lined water storage and as noted by the DRMS, until the basin is fully extracted and lined, and a leak test is performed and approved by the State Engineer. Progressive regrading and lining however will be performed and is discussed in Exhibit L. SECTION [E] (e) An approximate timetable to describe the mining operation. The timetable is for the purpose of establishing the relationship between mining and reclamation during the different phases of a mining RAPTOR MATERIALStic Raptor Materials, LLC Cogburn Sand, Gravel, and Reservoir Project February 2025 A REGULAR IMPACT (1121 CONSTRUCTION PERMIT APPLICATION - COLORADO DIVISION OF RECLAMATION MINING AND SAFETY, OFFICE OF MINED LAND RECLAMATION REgpEC // PAGE 7 EXHIBITO operation. An Operator/Applicant shall not be required to meet specific dates for initiation, or completion of mining in a phase as may be identified in the timetable. This does not exempt an Operator/Applicant from complying with the performance standards of Rule 3.1. If the operation is intended to be an intermittent operation as defined in Section 34-32.5-103(11)(b), C.R.S., the Applicant should include in this exhibit a statement that conforms to the provisions of Section 34-32.5-103(11)(b), C.R.S. Such timetable should include: SUBSECTIONS ED THROUGH 011) i. an estimate of the periods of time which will be required for the various stages or phases of the operation; ii. a description of the size and location of each area to be worked during each phase; and H. outlining the sequence in which each stage or phase of the operation will be carried out. (Timetables need not be separate and distinct from the mining plan, but may be incorporated therein.) At anticipated production levels of 800,000 tons per year, extraction is expected to roughly follow the durations presented below. Please Note: The time periods will depend on the actual rate of production required to meet market demand, and the average annual advance may also vary with thickness and quality of :he sand and gravel, management of water and ground conditions, and other unforeseeable circumstances. Some flexibility may also be exercised to optimize operations around or through existing infrastructure if scheduled for removal. As noted in Section (d) above, while sequential development of the pits is preferred, simultaneous operation in more than one and possibly all pits may be necessary. A more detailed discussion of mining and reclamation timing is presented in Exhibit E - Reclamation Plan. Exhibit C-2 - Extraction Plan Map shows the location and planned extraction limits, general direction of extraction, and related features described above; along with features made obvious in the included aerial image of the permit location and surrounding lands. Exhibits C-2 - Extraction Plan Map and L - Financial Warranty Map, shows Initial Extraction proposed to begin in the yellow hatch area shown on the Exhibit L Map. Pit P125_S1 is small, occupying only 10.4 acres. The direction of extraction will follow the perimeter of the extraction limits in order to establish the perimeter keyway (dewatering trench) for the 10.4 -acre Pit P125_S1, 22.1 -acre Pit P125A, and 38.8 -acre Pit P125B. Approximately 60.7 acres across the three pits are expected to be extracted in the first five years. Table E-1 in Exhibit E — Reclamation Plan provides a projection of mine development and regrading/reclamation. The plan as described is a forecast and may vary according to market conditions with mining and subsequent regrading occurring faster or slower, sometimes significantly so. The geology uncovered as extraction progresses may also dictate changes in the rate of extraction. If efficiency demands a higher production scenario, up to three separate areas could be developed in the manner described simultaneously. Such changes may happen quickly and would be addressed in the Annual Report. The estimated timetable for extraction, commencing approximately summer to winter 2025, is estimated to take 8-9 years combined, or longer, followed by an additional five years to complete reclamation; or a total estimated life of the mine of 13-14± years, and ending approximately winter 2035 to 2036. This is a life of the mine operation and all timetables are estimates and may prove shorter or longer than stated. The final determination will occur five years after the deposit is exhausted and all marketable product has been removed and necessary infill completed at the location to the point of final reclamation as approved or modified under the terms of the permit. Raptor Materials, LLC Cogburn Sand, Gravel, and Reservoir Project February 2025 A REGULAR IMPACT (112) CONSTRUCTION PERMIT APPLICATION - COLORADO DIVISION OF RECLAMATION MINING AND SAFETY, OFFICE OF MINED LAND RECLAMATION I/ PAGE 8 EXHIBIT D This submittal is unable to fully forecast the maximum extent of disturbance within the affected lands expected at any given point in time, beyond an annual basis. As operational extraction and reclamation efforts will vary annually, the timing of extraction, reclamation, and life of operation as forecasted must be based on an initial estimate [refer to Exhibit L: Reclamation Costs], then subsequently verified and adjusted as reasonably determined at the time of the required OMLR Annual Report. If justified by field conditions, a rider to the warranty would follow in due course to reflect current or forecast conditions where such conditions cannot be reasonably attenuated in a timely manner prior to the due date of the next year's Annual Report. This will serve to assure flexibility and confidence in continued operations until completion of the desired end use. SECTION EA A map (in Exhibit C - Pre -Mining and Mining Plan Maps(s) of Affected Lands, Rule 6.4.3) may be used along with a narrative to present the following information: SUBSECTIONS AND (II) (i) nature, depth and thickness of the deposit to be mined and the thickness and type of overburden to be removed (may be marked "CONFIDENTIAL," pursuant to Rule 1.3(3)); and (ii) nature of the stratum immediately beneath the material to be mined in sedimentary deposits. Generally, total soil depth (including all soil horizons) over the property may vary from approximately zero inches to six feet with the potential for a mixture of silt, clay, or gravel outcrops over random areas. Gravel depth may occur from the surface to the underlying shale varying at approximately 23± to 50± feet over the entire property. The underlying shale is generally described as a dark grey and very stiff unit which is expected to be an excellent base for lined reservoirs, and if needed, liner material for the side slopes of the excavations. Additional geologic considerations are also included in the addendum: Slope Stability Analysis. SECTIONS CO AND (Hl Identify the primary and secondary commodities to be mined/extracted and describe the intended use; and name and describe the intended use of all expected incidental products to be mined/extracted by the proposed operation. For a diverse list of products to be extracted and/or processed, and sold, they may include but are not limited to the more common products identified in Table D1 - Varra Companies Product List (included as an addendum), or other inert or commonly useful products used for diverse construction purposes, including, but not limited to: structural fill, concrete products, road construction products; and other products to aid the residential, commercial, industrial customer; and for any other infrastructure use. SECTION (I) Specify if explosives will be used in conjunction with the mining (or reclamation). In consultation with the Office, the Applicant must demonstrate pursuant to Rule 6.5(4), Geotechnical Stability Exhibit, that off -site areas will not be adversely affected by blasting. Explosives will not be used. RAPTOR MATERIALSuc Raptor Materials, LLC Cogburn Sand, Gravel, and Reservoir Project February 2025 A REGULAR IMPACT (112) CONSTRUCTION PERMIT APPLICATION - COLORADO DIVISION OF RECLAMATION MINING AND SAFETY, OFFICE OF MINED LAND RECLAMATION //PAGE 9 EXHIBIT D SECTION (1) Specify the dimensions of any existing or proposed roads that will be used for the mining operation. Describe any improvements necessary on existing roads and the specifications to be used in the construction of new roads. New or improved roads must be included as part of the affected lands and permitted acreage. Affected land shall not include off -site roads which existed prior to the date on which notice was given or permit application was made to the office and which were constructed for purposes unrelated to the proposed mining operation and which will not be substantially upgraded to support the mining operation. Describe any associated drainage and runoff conveyance structures to include sufficient information to evaluate structure sizing. Entry into the permitted areas is dependent upon the needs and necessary management of continued agricultural activities during operations, as well as essential management and mobility within the active areas of extraction and correlated need for transportation of human resources, equipment, and product. Human resources for operations, heavy equipment, and haul traffic will occur based upon the desired and dynamic activities necessitated by time and circumstance within the designated Pits. Access points* for continued agricultural, extraction, and plant site operations are shown on Exhibit C-2: Extraction Plan Map, as follows (NOTE: Access purpose and usage may change in time from that indicated here -in. Also, general existing dimensions and length of existing access roads are represented in the aerial images on the Exhibit Maps relative to the access locations detailed, below. Modifications may occur as needed and will be reported in OMLR Annual Reports.): * Entrance 1: Primary access to Pit P125_S1 Entrance 2: Primary access to Pit P125A Entrance 3: Primary access to Pit P125B Existing roads outside of the permit boundary are shown on Exhibit C-1: Existing Conditions Map. Existing on -site internal access roads are also visible to scale in the aerial information provided under Exhibit C-2: Extraction Plan Map and other map exhibits included with this submittal. In general, Operations will predominantly utilize unmodified existing agricultural field access roads (unless otherwise indicated), which will themselves be subsequently extracted in time where they fall within the extraction limits shown on Exhibit C-2: Extraction Plan Map. No other defined roads within the Extraction Limits will occur except for the temporary paths created by extraction equipment, or otherwise determined by subsequent Revision to the permit. All existing agricultural roads outside of the designated extraction limits will be retained according to the desires of the landowner. The same shall form part of the final end use of the reclaimed lands, unless otherwise indicated in this submittal or by subsequent permit revision. Known structures and landowners, including above and below ground utility owners, located on and within 203± ft. of the permit boundary, are shown on Exhibit C-1: Existing Conditions Map including creeks, roads, buildings, oil and gas facilities [such as tanks, batteries, wells and lines], and power and communication lines and support structures, easements and rights -of -way. The Geotechnical Stability Exhibit (attached as an addendum) provides certification from a registered professional geologist that these structures will not be harmed by planned extraction profiles and extents. For lands within the Extraction Limits, only those structures, easements, and rights -of -way shown in Exhibit C-2: Extraction Plan Map, are anticipated to remain from those shown in Exhibit C-1: Existing Conditions Map. If changes to existing or possible revised structures, easements, or right-of-way are in any manner retained, or where they might occur subsequent to OMLR approval of this application, then a Technical Revision will be submitted to update Exhibit C-2: Extraction Plan Map. All established setback Raptor Materials, LLC Cogburn Sand, Gravel, and Reservoir Project February 2025 A REGULAR IMPACT (112) CONSTRUCTION PERMIT APPLICATION - COLORADO DIVISION OF RECLAMATION MINING AND SAFETY, OFFICE OF MINED LAND RECLAMATION //PAGE 10 EXHIBIT D distances from planned activities to any remaining features will be maintained regardless. Future agreements may be reached allowing mining in areas currently identified as being restricted to mining containing certain structures, easements or rights -of -way. Exhibit C-1 shows and identifies all these features understood by us, and the respective Surveyed information, and correlated observation and title work upon which they are based and represented on the attending maps. The permit maps are not surveys. They are maps and as such, they comprise a reasonable representation of all site features, but must not be relied upon by themselves exclusively for location purposes. Maps and features are not a substitute for field identification of underground structures and will rely upon location services of the 811 service. Setbacks where required will be based on the actual field locations of site features. Exhibit C-2 shows the remaining oil wells and lines within planned operations at the time of the submittal. Any revisions, additions, or modifications of residual oil wells or lines will be avoided as represented on updated maps and revisions to the permit, and consistent with setback distances identified in this submittal. Removal of any existing structures such as the oil and gas structures and or lines, will be updated on required Annual Reports, or by Technical Revision, as warranted, or as otherwise directed consistent with Colorado Statute. NOTE: Shoreline irregularities and fill to establish and enhance the aesthetic and end -use functions of the resulting basins shown on Exhibit F: Reclamation Plan Map, are illustrative only, as this effect as to location and extent will be field -fit where practical, and may substantively different from that portrayed under the application. The actual location and extent will be identified in subsequent DRMS Annual Reports, and absent there, at the time of any applicable release of a location in part or whole from the permit. Since representations cannot be accurately portrayed in advance, Exhibit F simply identifies the near maximum extent [typical] of the resulting basins or ponds and the potential for shallows during lining and finished grading. Additional information on the reclamation and restoration of affected lands is identified under Exhibit E: Reclamation Plan. All reclamation will follow guidelines established under Exhibit E - Reclamation Plan and Exhibit I —Soils Information and Exhibit J - Vegetation Information, until and unless otherwise revised. To the extent possible, pond bottoms will be left rough, with the possible introduction of logs or other non - putrescent inert material to aid in aquatic habitat and cover [Refer to Exhibit H - Wildlife Information]. RAPTOR MATERIALSuc Raptor Materials, LLC Cogburn Sand, Gravel, and Reservoir Project February 2025 A REGULAR IMPACT (112] CONSTRUCTION PERMIT APPLICATION - COLORADO DIVISION OF RECLAMATION MINING AND SAFETY, OFFICE OF MINED LAND RECLAMATION // PAGE 1 EXHIBIT E EXHIBIT E -RECLAMATION PLAN SECTIONS 1 AND 2 In preparing the Reclamation Plan, the Operator/Applicant should be specific in terms of addressing such items as final grading (including drainage), seeding, fertilizing, revegetation (trees, shrubs, etc.), and topsoiling. Operators/Applicants are encouraged to allow flexibility in their plans by committing themselves to ranges of numbers (e.g., 6"-12" of topsoil) rather than specific figures. The Reclamation Plan shall include provisions for, or satisfactory explanation of, all general requirements for the type of reclamation proposed to be implemented by the Operator/Applicant. Reclamation shall be required on all the affected land. The Reclamation Plans shall include: SECTION 2.A A description of the type(s) of reclamation the Operator/Applicant proposes to achieve in the reclamation of the affected land, why each was chosen, the amount of acreage accorded to each, and a general discussion of methods of reclamation as related to the mechanics of earthmoving; Reclamation at this location is geared to lay a foundation that will capture both short and long-term multiple -end use benefits that will complement the dynamic mix of surrounding land uses over time. The primary end use will be the creation of much needed developed water resources with other areas returned to current use or other development as chosen by the property owner. Pits P125A (22.1 acres) and P125B (28.2 acres) will be reclaimed as lined reservoirs, while Pit P125_S1 (10.4acres) will be backfilled as soon after extraction as practically possible for use to be determined by property owner. Backfill will be sourced from overburden on site as well as from the adjacent, active P115 Kurtz (M1999- 006) and P122 Bearson (M2015-003) sites as needed to complete timely regrading or backfill. Topsoil will be stripped and stockpiled onsite for use in reclamation as extraction progresses. SECTION 2.0 A comparison of the proposed post -mining land use to other land uses in the vicinity and to adopted state and local land use plans and programs.' In those instances where the post -mining land use is for industrial, residential, or commercial purposes and such use is not reasonably assured, a plan for revegetation shall be submitted. Appropriate evidence supporting such reasonable assurance shall be submitted; The subsequent development of a diverse multiple land use potential at this location, when complemented with sound environmental parameters, as advanced under this application and the attending OMLR permit exhibits, is in keeping with the spirit and intent of the policies and goals of the State of Colorado, Weld County, and the Towns of Firestone, Platteville and Mead. Approval of the application will allow the resource to be accessed and utilized in a responsible and orderly manner as required under both Colorado law, and consistent with local County and Municipal Regulations. SECTION 2.C A description of how the Reclamation Plan will be implemented to meet each applicable requirement of Rule 3.1; Rule 3.1.1 Establishing Post -Mining Use Raptor Materials, LLC Cogburn Sand, Gravel, and Reservoir Project February 2025 A REGULAR IMPACT (112] CONSTRUCTION PERMIT APPLICATION - COLORADO DIVISION OF RECLAMATION MINING AND SAFETY, OFFICE OF MINED LAND RECLAMATION // PAGE 2 EXHIBIT E Pits P125A and P125B will be reclaimed as developed water resources through the construction of lined reservoirs. Pit P125 S1 will be backfilled for use to be chosen at a future date by the property owner. Rule 3.1.2 Reclaiming Substituted Land All affected land shall be reclaimed; no previously mined land shall be substituted for purposes of reclamation. Rule 3.1.3 Time Limit and Phased Reclamation There are no fixed sequences or phases scheduled as part of the extraction plan. Instead, Pits are used instead of Phases to describe the activities, since each Pit can be accessed concurrently with another, instead of a strict sequential requirement. An Initial Extraction Area that is scheduled to be completed within 5 years is presented in Map Exhibit C-2. More detailed information about sequencing and the Initial Extraction Area is presented in Exhibit D and Exhibit L. As discussed in Section (e ) of Exhibit D, the estimated timetable for extraction, commencing approximately summer to winter 2025, is estimated to take 8-9± years combined, or longer, followed by an additional five years to complete reclamation; or a total estimated life of the mine of 13-14± years, and ending approximately winter 2038 to 2039. Rule 3.1.4 Public Use No land within the permit area is intended to be open for public use during the Operations. Rule 3.1.5 Reclamation Measures— Materials Handling No lining or final grading will occur in Pit P125_S1 as it will be backfilled to approximately original grade as soon after extraction as practically possible. Backfill and topsoil placement expected to be completed 1-2 years after extraction in this pit is complete. It is currently anticipated the fill material will come from excess material currently available on the adjacent Raptor Materials Kurtz operation (DBMS permit M1999-006). As extraction progresses through the Pits, the resulting 1.25H:1 V slopes created during extraction will be concurrently modified when and where practical. Where pit depths exceed 30 feet below ground surface (bgs), extracted final walls will be lined to 25 feet bgs prior to placement of any backfill and as soon after extraction as practically possible to allow later tie in to the upper liner (between 25 feet bgs and 5 feet bgs) (sea Figure 1 below). They will then be backfilled at slopes no steeper than 3H:1 V for depths 30 feet bgs and greater (refer to addendum: Slope Stability Analysis for additional information). ,. Concurrent reclamation is a natural incentive for Operations to speed site recovery while generally serving to lower attending financial warranty burdens. The cut slopes along the extraction limits perimeter will be finish graded by methods including pushing the resulting pit bottom with a dozer upslope, excavation, hauling and placement of pit bottom material as backfill, or backfilling using previously excavated surplus material of limited or low market value until the resulting basin slopes conform with Rule 3.1.5(7). All finished grades in Pits P125A and P125B will be 3H:1 V with an underlying liner (see Figure 2 below). Raptor Materials, LLC Cogburn Sand, Gravel, and Reservoir Project February 2025 A REGULAR IMPACT (1121 CONSTRUCTION PERMIT APPLICATION - COLORADO DIVISION OF RECLAMATION MINING AND SAFETY, OFFICE OF MINED LAND RECLAMATION // PAGE 3 EXHIBIT E Typical Liner and Backfill/Regradefor Extraction Limit Wall--30-ft Stability Requirement 30 -ft .• .:•:. •. • • •.. . _ • .,:• ...4 1•••• • .•• 4 t . • 4 • • • • • • •. :::.•.•. :::.: •• •:.. . ,.•.,. • ••:•:•: • • a Unexcavated Perimeter Wall (slope 1.25H:1V) • . . . .•;••• • •••••••••• . •.;.,.,.,.•; ; 4016 :. , .•:;.• . . ••....... :. • Liner Original ground surface Backfill (regraded) slope at 3H:1V • ...• . . . . .•• . . • :•: •• . . . . Figlre 1, Typical Concurrent Lining and Regrade for Pit Depths below 30 ft Backfill material Sequence 1. In cycles • Install liner in 6" lifts • Backfill to 3H:1V 2. Replace topsoil Lin.ng of basins involves the placement of low permeability compactable fill, from on -site or other suitably sourced geologic materials, into the keyway (dewatering trench); the same keyway used to facilitate discharge to keep the basins dry and free of groundwaters at the time of extraction. The balance of the basin floors (where needed) and slopes are also covered and compacted with the same materials until it meets the standards established under the August 1999 State Engineer Guidelines for Lining Criteria. Typical to obtaining approval for the constructed liner, the lined basin must pass a 90 -day leak test. Correspondence from the OSE approving the construction of the lined basin will be submitted to the OMLR on receipt; or as part of any request for release of the permit, in part or whole. Raptor has extensive experience successfully constructing lined storage reservoirs with several prior projects completed, tested and approved by the OSE. The deposit contains extensive materials suitable for use in constructing the liner including shale, claystone, clay, sandstone-claystone-siltstone and sandstone- siltstone bedrock, clay lenses in the sand and gravel deposit, and overburden often comprised of low plasticity sandy silty clay to silty sand. Excess topsoil has also been successfully used as a liner construction material and could be used if excess material is available. Other materials encountered within the sand and gravel deposit during excavation would be stored in temporary piles on the excavation floor. Parameters such as plasticity, percentage of fines etc. have not been determined for the deposit materials at this time but extensive experience in constructing several approved lined storage reservoirs with similar materials along the Saint Vrain Creek and other rivers and streams provides high confidence in the availability of suitable materials within the extraction area. The liner will be progressively constructed once the pit is developed sufficiently to allow regrading and any proolems with the efficacy of the liner can usually be detected prior to leak testing through evidence of seeps in the constructed liner which can have remedial action taken. Similarly, although not common, seeps are sometimes observed in the bedrock floor. While these have generally in Raptor's extensive experience proved to be self -healing, where needed remedial action and spot lining and compaction would be undertaken. RAPTOR MA'rEP.IALSuc Raptor Materials, LLC Cogburn Sand, Gravel, and Reservoir Project February 2025 A REGULAR IMPACT ( 112) CONSTRUCTION PERMIT APPLICATION - COLORADO DIVISION OF RECLAMATION MINING AND SAFETY, OFFICE OF MINED LAND RECLAMATION �1D REgpEC //PAGE 4 EXHIBIT E Liner construction involves building a compacted low permeability core by placing and compacting suitable material in 6"f lifts. A Caterpillar 815 or 825 (or equivalent) compactor generally makes 2-4 passes to achieve suitable compaction of the core and which experience has shown provides integrity of the core both laterally and vertically. This process starts in the keyway and continues until the core reaches ground level. As the core is built the internal slopes are also brought up to achieve a 3:1 or shallower slope. The exact mix of material used to construct the core is determined at the time of construction based on the materials available. Moisture adjustments required have generally been minimal in prior experience and judgements on additional water are made during construction to achieve a moisture content typically in an optimum range of 2-4 percent. The internal slopes do not necessarily have to be clay materials, but can consist of pit run, overburden, shale or a mixture of these materials. The general approach to construction of the core and regrade of a typical wall at the extraction limit is shown in Figure 2 below. Typical Liner and Regrade for Extraction Limit Wall — Final Reclamation , > Liner •.• « •.•. •.ea. + 4 Topsoil • • 444,1 - ... l'.•_•• •j%•.:e• 1)M :i :ri•::O•Vt•.., •a• r• 1•. sl Z4111444 1 1 4 4 4 • 11,1•,•)))))111111 4 1< 4 4 4 4< 4 4 4 4 4 4 t 4 4 4 4 4 1 1 1•>> 1 4>>•, 1 1 1 1 1 1 1 4444 4 '••1')11')'1'•1 444444 44 44114444 444(4 •1141111114) >`>'•`•'.`>'•'>••`1')'•':') `141'/'1'1'1 `1'•/ 44444(4(444(4W 4•4 44414 • >••)••••>••• 1 1 1 1 1 1 1 1 1 1 1 1 4< 4 4 4 4 4 4 4 4 4 4 4 1 4 4. 4 4 4 4 4 l 4 4 4 4 4( 1 4 1. 4 4 1 1 4 4. 4 4 4 4 4 4. 4 4 4 4 41 1 1 1,>> 1•) 1. 1 1) 1 1 4 1 4 1 1 1 1 1 1. 5, 44444.444444411444.41•••••4, • 1114))),•)11:411111411111411 4444444(444444.4•t4144Ift4444 11111)1,•••••••111114.1.11111111 4< 1 4 4 4 4 1 4< 1 1/ 1 1 4• 4 1 4 4 4 4 4 4 4•• 1 14)4• )414)4.4)4.411••1)414111,4'11>•1•••tlt•4.1.4.4.1.1•II 11L•4>4>4>•, 4141414.4)4114414111.1.111.111.1.1.111.1.1.1.1.1.1.1'• !1 )`114114141.>414••>414)1.1.1.4141414)4141411411 •t •1114'41 .1 .111.1.1 . • 4 . • 1 • ' • 1,1.1 4.4.4.4,4.4'••1'4'•'••4 •11.1.4•,••••••••••4••; 4;. 4'1'•'4'4'•'4'4'4': 4'1•'4'• ••••••••. • ••• �� ♦•• • 1 ♦ • • • • •••••'•••'1' 1 '1'4'•)1'4 414 4'4'4'4••'1 • ♦ 4 • • •'• •'• ' • • • ••• • 1 .•4•4.4•4•4•4.4'•'t'•'•' '• •♦•• • •It•. •)• • • 1111• •1. • • • • • •4•••4••• .•.•.•.•.•••.•. 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Original ground surface Static Water Level .�. :rf•r1•. �.�}• y. • • t •4 4 • •• 1.11 . /• I • •Ji•JN••:••• • -!. �•HJ•MfM•r• e tir�•:1••fN•11r • N•M,iv•:ti i•r.•.•- -• w•i•� JNN �,. N• V•: :JAI•, :JY:�•lY:.'•'J4✓•• • Sequence 1, In cycles • Install liner in 6" lifts • Backfill to 3H:1V 2. Replace topsoil Regraded slope at 3H:1V • H{'!.t.J•JY•lY.1YV••'Y:J•Y•.4rN•iY Y• ,5:1 • r..fle +.r.v h t M• +{.� .... - -- :.••wt .J �.et �•.•:Jti•./.. 1, 2.1!2: T.•..�Y.: .:. Nr�•• 11:1,1 ••Lr.•::::.•••L•+.•..•.,.+ +1.111 +1114:••.r.+1.11 --'�:: ::. : -• zYM:•�(. �•r /•Jti •!`.L lww...'.!•.'w�+J.NYti •Y�•.J•J•J•J•:• _ !JJ'.41"�.�.�i: :ikJ.. :: • �..• !;.• �t•.+�•liN.iYrrJ•rt��rY.iti+Sirr+t,..l• > { %�ti;=.. �....t... �i� -!. Jw JL� { '"4'L'iK;e.' •�t�t�r::.....`^. ;. Wh 421!1: v ~•Y•'N rs `: •:•r.•ti --......,......—‘•••••••',rrJ2•ri:{�'L•Yi�v....v... -'.L•.iti..:1.. �• ��. ��•.�Y�•.y♦��y +..rrte. ..• +• •'NCH•.-..... �.• :....trw•J... .,:.J•J.JV.•-r•!:••1. Y r/•�Y4tstitz.e••.kin: cetita. •M.. 1 - J...••• - _ .- .....- I•:•_•L•41:.•Jv.Y•.•..•. �+ •1 • +k.•..'.•.,•..•..•1.�.�•�.�....1..�-... :'-.i:~..e.e. •.t�R YVtwV�V')'V.wV.y1�•• .•JriMJ./•'�•'.'!;/.•I./.J ... •.WML•: .... 4. •I .:=µ.h1./•. :l•I•J•..7". • Y.il •!Z YZ•V}•V :: •.V1.rei +!•✓K� •Lti ` Y}:.•I••ti..•v....."..r•►....•....” ... _•••••.• v., ..�••.S Y-: •.•tr..........t..: •L•. 1111•.!-.-.r.•'tiL r r. •••••••••••••••••••••••••••••%••••••%•%•%•••••••••••••••.•-•••••. Backfill material Figure 2, Typical Completed Reclamation Liner and Regraded Slope for Extraction Limit Wall The excavation of sand and gravel does not entail or engage any processes, products, or methods that are expected to result in the release of pollutants or otherwise contaminate surface or groundwater. A Backfill Notice is included with this application as an Addendum at the back of Exhibit E — Reclamation Plan, to facilitate the fill of portions of the extracted lands for final end -use potentials beyond water storage, which may include residential, commercial or industrial structures or uses otherwise approved, now or in the future, by Weld County, Colorado; or a Colorado municipality, as applicable. The extent and nature of the water storage basin represents the maximum build -out respective of optimal extraction of commercial product and resulting final slopes. 3.1.6 Water — General Requirements Since the primary end use is developed water resources, the basins are intended to hold waters based upon the rights assigned by decree, or as stipulated in regulatory compliance with the Colorado Division of Water Resources, Office of the State Engineer (OSE). This may include the need to augment water sufficient to Raptor Materials, LLC Cogburn Sand, Gravel, and Reservoir Project February 2025 A REGULAR IMPACT (1121 CONSTRUCTION PERMIT APPLICATION - COLORADO DIVISION OF RECLAMATION MINING AND SAFETY, OFFICE OF MINED LAND RECLAMATION // PAGE 5 EXHIBIT E cover the anticipated exposed groundwaters of the basins in the unlined state. The entire unlined basin is or will be sufficiently covered under an approved Substitute Water Supply Plan. In order to again liberate waters set aside for augmentation, the basins will as soon as is practical be backfilled or lined to segregate the basin from Colorado groundwaters. The impacts of the proposed project on the prevailing hydrologic balance are discussed in Exhibit G - Water Information. 3.1.7 Groundwater - Specific Requirements A Groundwater Monitoring Plan is attached as an addendum to Exhibit G - Water Information. 3.1.8 Wildlife Wildlife safety and protection is discussed in Exhibit H - Wildlife Information. 3.1.9 Topsoiling Stripped topsoil that is not immediately used for reclamation will be stockpiled and stabilized with a cover of native vegetation as an erosion control measure. The topsoil stockpile location at the north end of Pit P125A is intended to allow for the complete extraction of Pit P125 S1 and the near -complete extraction of Pit P125A before relocation and/or application to reclaimed exposed surfaces. The quality of the on -site topsoil is detailed in Exhibits I and J — Soils and Vegetation. SECTION 2.D Where applicable, plans for topsoil segregation, preservation, and replacement; for stabilization, compaction, and grading of spoil; and for revegetation. The revegetation plan shall contain a list of the preferred species of grass, legumes, forbs, shrubs or trees to be planted, the method and rates of seeding and planting, the estimated availability of viable seeds in sufficient quantities of the species proposed to be used, and the proposed time of seeding and planting; Topsoil stockpiling, stabilization, and application is addressed in this Exhibit E - Reclamation Plan Sections 2.A, 2.C, and 2.F. Spoil stabilization, compaction, and grading is addressed in this Exhibit E - Reclamation Plan Sections 2.C and 2.F. A list of preferred seed mixes, application rates, and methods for revegetation is included as an addendum to Exhibit L - Reclamation Costs. The proposed time of seeding and planting is addressed in Section2.F. SECTION 2.E A plan or schedule indicating how and when reclamation will be implemented. Such plan or schedule shall not be tied to any specific date but shall be tied to implementation or completion of different stages of the mining operation as described in Rule 6.4.4(1)(e). The plan or schedule shall include: (The schedule need not be separate and distinct from the Reclamation Plan, but may be incorporated therein.) i An estimate of the periods of time which will be required for the various stages or phases of reclamation; `RAPTOR MATERlALSuc Raptor Materials, LLC Cogburn Sand, Gravel, and Reservoir Project February 2025 A REGULAR IMPACT (1121 CONSTRUCTION PERMIT APPLICATION - COLORADO DIVISION OF RECLAMATION MINING AND SAFETY, OFFICE OF MINED LAND RECLAMATION // PAGE 6 EXHIBIT E The estimated timetable for extraction, commencing approximately winter 2025, is estimated to take 8- 9± years combined, or longer, followed by an additional five years to complete reclamation; or a total estimated life of the mine of 13-14± years; ending approximately winter 2038 to 2039. This is a life of the mine operation and all timetables are estimates and may prove shorter or longer than stated. The final determination will occur five years after the deposit is exhausted and all marketable product has been removed and necessary infill completed at the location to the point of final reclamation as approved or modified under the terms of the permit is completed. ii. A description of the size and location of each area to be reclaimed during each phase; and The final land configuration will ultimately result in one 10.4 -acre pit backfilled to approximate original contour and two (2) reservoir basins totaling 60.4 surface acres, with a static water elevation surface area of 45.4 acres as illustrated on the following Exhibit F - Reclamation Plan Map. The map details the post resource recovery land form establishment. The size of the resulting basins is a function of area geology and available resource relative to man-made obstructions that serve to prohibit a greater linkage. An outline of the sequence in which each stage or phase of reclamation will be carried out. Table E-1 provides a projection of mine development and regrading/reclamation. The plan as described in Exhibit and above in this Exhibit E, is aforecast and may vary according to market conditions with mining and subsequent regrading occurring faster or slower, sometimes significantly so. The geology may also dictate changes in the rate of extraction. If efficiency demands in a higher production demand scenario, seoarate areas could be developed in the manner described in Exhibit D simultaneously. Such changes may happen quickly and would be addressed in the Annual Report. SECTION 2.F A description of each of the following: Final grading - specify maximum anticipated slope gradient or expected ranges thereof; As part of reclamation, lands situated above the anticipated final water level of the completed basins, and within 10± feet below the anticipated final water level of the basins, will be graded to 3H:1 V, or flatter. Lands below 10± feet from the anticipated final water level of the basins will also be graded to 3H:1 V, or flatter, unless 2H:1 V slopes are otherwise approved by subsequent permit revision. All basin walls below 30 ft bgs will be graded to 3H:1 V or flatter. Naturally occurring or previously established slopes may exceed 2H:1 V where not otherwise affected by extraction activities and may not be altered as part of reclamation unless necessary to facilitate the reclamation of affected lands. All affected lands between the extraction limits and remaining above the anticipated high-water mark of the basins will be capped with a minimum of six (6.0±) inches of soil, as supported by Exhibit I— Soils Information. Timing and use of soil are detailed further under Exhibit I- Soils Information and Exhibit L - Reclamation Costs. Where compacted lands exist, and are to be revegetated,-those locations will be ripped prior to re - soil application. There are no known areas of compaction at the time of this application which would require such activity; and ripping remains a contingency of the application. Raptor Materials, LLC Cogburn Sand, Gravel, and Reservoir Project February 2025 A REGULAR IMPACT (112) CONSTRUCTION PERMIT APPLICATION - COLORADO DIVISION OF RECLAMATION MINING AND SAFETY, OFFICE OF MINED LAND RECLAMATION // PAGE 7 EXHIBIT E Lands not otherwise occupied for developed water resources will be later developed to the highest possible end -use, and will likely comprise a mixed use which may include other general agricultural uses as well as light residential, commercial or industrial uses. Seeding - specify types, mixtures, quantities, and expected time(s) of seeding and planting; The balance of unoccupied affected lands above the anticipated static water level will be stabilized where necessary utilizing the seed mixture as shown as an addendum to Exhibit L — Reclamation Costs: Table L — Preferred/Primary Revegetation Seed Mixture. The Primary Revegetation Seed Mixture combines a thoughtful mingling of predominantly native grasses of diverse height, form, color and function, to assure that the reclaimed site can provide for a multiple -use benefit. Should post resource recovery land development be deferred, or even negated, all affected land remaining above the anticipated final water level of the resulting ponds will be stabilized with a diverse and durable cover of predominantly native grasses. This is compatible with, and an imorovement over the diminished lands located in the floodplain of the two rivers, and area monocultures of residential bluegrass lawns and surrounding cropped land. Generally, warm and cool seed mixtures can be treated in a myriad of ways. In Table L this distinction is indicated in the column labelled "C/W". Cool season mixtures are often planted in the fall and warm in the spring, however, exceptions may apply. Some argue warm season grasses are better broadcast, wl-ile others like them drilled with the cool season grasses. Resoiled areas will be allowed sufficient time to settle prior to seeding, which will commonly follow in the fall or spring. Resoiling will occur when soil moisture is adequate to prevent blowing, yet dry enough to prevent compaction. Part of the soil rebuilding process on the reconstituted soils will be in establishing structure to the soils to facilitate plant -soil -water relationships. Overly compacted soils will tend to limit soil structure development and create a poor seedbed for later establishment, so revegetation may be deferred if soils to be reclaimed are manipulated while wet, instead of moist. Fertilization - if applicable, specify types, mixtures, quantities and time of application; Fertilizer may be used as part of revegetation efforts. The need for fertilization and any subsequent fertilizer rates will be determined based upon soil tests taken at the time of reapplication of salvaged soil to affected lands remaining above water level. Status of fertilization and soil test results can be included in OMLR Annual Reports, as warranted. Sampling will utilize a hand auger and approved NRCS soil sample bags, and utilizing recommended procedures. Any soil testing will be conducted by the CSU Soil Laboratory in Ft. Collins, Colorado. The tests will be used to monitor soil quality and suitability of any amendments. Fertilizer may be withheld until after emergence to deter the encouragement of weed species. The use, composition and rates of fertilization will be determined prior to the time of seeding where appropriate, and may be reported in the OMLR Annual Reports, as appropriate. Revegetation - specify types of trees, shrubs, etc., quantities, size and location; and ` RAPTOR MATERIALSuc Raptor Materials, LLC Cogburn Sand, Gravel, and Reservoir Project February 2025 A REGULAR IMPACT (112) CONSTRUCTION PERMIT APPLICATION - COLORADO DIVISION OF RECLAMATION MINING AND SAFETY, OFFICE OF MINED LAND RECLAMATION // PAGE 8 EXHIBIT Although the establishment of native grasses is a primal requirement under this permit, the incorporation of forbs, shrubs and trees remains at the discretion of the landowner. Markets and the inherent values of the landowner to enhance the multiple end use worth of the property will serve to encourage the vertical development and diversity of the area vegetation with the contribution of forbs, shrubs, and trees. The purpose is to add cover, food source for wildlife and pollinators, and stratified creatures that will come to inhabit and depend upon the natural configuration, character and extent of the finished landform and diverse stabilizing cover. The use of a sterile hybrid live cover crop will aid in the stabilization of the soil by allowing a quick vegetative cover to become established in advance of the native grasses. The hybrid will also serve as an aid to reduce competition resulting from the establishment and growth of unwanted pioneer species (weeds) on disturbed ground. The attending reclamation seed mixture, and as approved, has a provision for the use of a sterile hybrid grass in lieu of mulch. Mulch, even when crimped with specialized equipment, is subject to being blown off the property, or reduced to an ineffective stubble. Often, it has been observed to intercept rainfall where it quickly evaporates from the stubble surface, limiting the benefits of light precipitation by preventing infiltration and percolation of moisture to the root zone. The hybrid on the other hand will establish quickly, but since it is sterile, will not continue to compete with the emerging native grasses. After two to three years, the hybrid grass will begin to die out just as the native grasses emerge and improve their dominance over the revegetated areas. Field identification and location of targeted weed species is fundamental to determining the extent and character of weed infestation; and in the subsequent development of a treatment plan. Due to the complex nature of identification, assistance with identification and mapping will be sought from among Weld County Weed and Pest Division; Colorado State University Cooperative Extension Service; U.S. Natural Resources and Conservation Service; as well as online and internal resources. Mapping will attempt to identify general areas of infestation within the permit boundary, and vectors of infestation from inside or outside the permit boundary. Vectors are a consideration in prevention of future infestation, which may affect on -site behaviors, including method and means of access within permitted lands. An expectation that vectors from adjacent lands must be treated by adjacent landowners if treatment on permitted lands is to be fruitful is part of continuing treatment considerations. Since the list of noxious weed continues to grow, and considering the development of new treatments, this management plan is intended to retain the flexibility needed to meet future conditions and capabilities in the arena of weed management and control. Weed management will be under the supervision of a certified weed management specialist. All applicable requirements currently in force at the time will be adhered to. The primary species to be identified, mapped (if found), and treated will include those species on the State of Colorado noxious weed list, as updated. List A species will be eradicated and List B Species will be controlled. Weed management efforts will also attend to current guidance from the Weld County Department of Public Works. It should be noted that many weeds are sourced and vectored from adjacent lands and waterways. Weed management will see diminishing effects that may be beyond the capacities of the Operator to ameliorate if responsible weed management fails on those lands. Consideration of due diligence should apply respective of an -site efforts and limitations due to sources and vectors beyond the reach of the Operator. RAPTOR MATERIALSuc Raptor Materials, LLC Cogburn Sand, Gravel, and Reservoir Project February 2025 A REGULAR IMPACT 11121 CONSTRUCTION PERMIT APPLICATION - COLORADO DIVISION OF RECLAMATION MINING AND SAFETY, OFFICE OF MINED LAND RECLAMATION // PAGE 9 EXHIBIT E Once the nature and extent of weeds have been mapped, and vectors identified, a course of treatment options will be considered in order of priority of economy and effectiveness. The overall object of weed management will be to control weeds by establishing a healthy competitive stand of vegetation that wins the competition for plant -available water. This effort is linked to on -site soil management, including monitoring of soil fertility and percent organic matter on problem lands relative to distribution and amount of field available moisture in affected areas. Physical weed control at the site will use non -chemical means, unless, due to weed morphology, or other factors, circumstance require application of other methods or an approved herbicide. If chemical weed control is utilized, it will be conducted in compliance with manufacturer's recommendations and in conformance with applicable federal, state, or local laws. Chemical treatment of weeds will be the last option considered except where all other methods of competitive control fails; including mechanical cutting, tilling, or removal of noxious weeds. Where possible, pre -emergent weed control chemicals will be used. An exception to chemical weed control would be operator -applied concentrated vinegar based organic weed control that does not harm soil or water. This is especially advantageous in application near water bodies. In general, weeds will be mowed or mechanically removed before a seed head can develop. This will take priority over recently seeded areas expressing emergent grasses. Where mechanical means fail; chemical applications may follow according to recommendations from previously stated sources, and applied accordingly (see above) to prevent damage to grasses, aquatic species and wildlife. An example of Chemical treatment and primary noxious weeds can be found at the Colorado State University Extension Service website: https://www.extension.colostate.edu/. Still, predominant weed control efforts will focus upon prevention, principally through the establishment of a diverse stabilizing cover of grasses, as described earlier. Regardless of control methodology, the intent of mechanical and chemical methods will be to prevent weed species from reproducing vegetatively, or by seeding in percentages that threaten the preferred species. In general, the idea is to aid the grasses in out competing weed species for plant available water and nutrients in the new soils, until such a time that the grasses are fully established over the applied areas, are dominant over the weeds, and capable of self- receneration. It should be understood that some weeds will remain. Total eradication of weeds is unlikely under the best circumstances and is not a reasonable expectation or likely outcome. Treatment and control of noxious or nuisance weeds will be reported in OMLR Annual Reports as warranted. Topsoiling - specify anticipated minimum depth or range of depths for those areas where topsoil will be replaced. Placement of approximately 6 inches of soil and initial stabilization of affected lands with a stabilizing cover of grasses will better assure a foundation for later vertical development and establishment of cover; whether resulting from natural invasion or direct planning of trees, shrubs, and forbs. By themselves, the grasses will provide a stable foundation for later enhancements, while visibly improving wildlife habitat by interrupting area monocultures. A Backfill Notice follows this page. The flexible use of inert fill will facilitate the timely reclamation of affected lands. RAPTOR MATERIALSuc Raptor Materials, LLC Cogburn Sand, Gravel, and Reservoir Project February 2025 A REGULAR IMPACT (1121 CONSTRUCTION PERMIT APPLICATION - COLORADO DIVISION OF RECLAMATION MINING AND SAFETY, OFFICE OF MINED LAND RECLAMATION EXTRACTION Pit Total Reserves (tons) P125_51 640,748 P125A 1,202,528 P125B 2,247,893 Table E-1 Mining -Regrading Schedule Years 1-5, Sand and Gravel Mined (tons ±) 640,748 1,202,528 1,356,724 6-10 891,169 Total 4,091,169 3,200,000 9,169 P125_51 P125A P1256 ,Length(ft) 3,129 5,177 5,963 Pit Wall Created (ft ±) _ 3,129 5,177 3,843 2,120 Total 14,269 12,149 2,120 RECLAMATION P125_51* P125A P1256 Length(ft) 3,129 5,177 5,963 Pit Wall Regraded (ft ±) 0 5,177 0 5,963 Total 14,269 5,177 5,963 P125_S1 P125A P1256 Length(ft) 3,129 5,177 5,963 Pit Wall Remaining (ft ±) 0 0 3,843 0 Total 14,269 3,843 0 *Pit P125_51 will be backfilled as soon after extraction as practically possible Pit walls will not be regraded to reclaimed conditions, but will be left as mined until backfilled // PAGE 1 EXHIBIT G EXHIBIT G - WATER INFORMATION SECTION t If the operation is not expected to directly affect surface or groundwater systems, a statement of that expectation shall be submitted. Operations will not adversely affect surface and groundwater systems. Measures described in the Cogburn Application and particularly in this Exhibit G, and also in Exhibits D and E are intended to minimize disturbances to the prevailing hydrologic balance of the affected land and of the surrounding area and to the quantity or quality of water in surface and groundwater systems both during and after the mining operation and during reclamation. The manner and method of extraction is detailed under Exhibit D - Extraction Plan. Anticipated effects on surface flows are anticipated to be minor to none. Essentially, the floodplain covers a majority of the property and unless under flood conditions, upland overland flows are generally diverted by levees, surrounding roads, or grassed drainage channels; or otherwise by draining internally into existing or planned basins. Considerable efforts are made to control storm flows, including the use of grassed waterways. Some rillinc will occur on cut slopes, but the sediment is inbound. A minor 6 -inch furrow above cut slopes will create a 1- foat swale that could minimize such rilling, especially valuable on reclaimed slopes above the final estimated water level of the basins. The stormwater management plan referenced in Exhibits I and J will address broader water management covering any piles of soil or inert fill constructed external to the excavations. Impacts to groundwater and area wells from groundwater discharge during mining was evaluated by AWES, LLC in their October 2024 report, as included in this submittal. The report concludes: "Dewatering multiple pits at the maximum predicted drawdown (Cells A&B) will likely have the greatest drawdown effects. It is anticipated that cell closure of one mine cell (Cell C) will occur during the mining and dewatering of the adjacent pit B, which will mitigate drawdown issues. Post lining head levels immediately up and downgradient of the lined pits are within the range of normal seasonal water table elevation changes. Predicted water level depressions (shadows) varied between -0.15 and -1.44 feet and predicted mounding was estimated at 0.05 feet for the three lined pits. The modeling results indicate that shadow -mounding effects of lining post extraction pits will not adversely affect the regional groundwater hydrology." POST RECLAMATION IMPACTS have been minimized: The AWES Mining and Water Storage Analysis report of October 2024 evidences that there will be no measurable impacts of either shadowing or mounding of the resulting lined basin. The operation therefore includes lining of the basin during reclamation of the resulting basin. Satisfaction of Colorado State Standards as to the integrity and functionality of the resulting lined basin will be made in cooperation with the Colorado Division of Water Resources, and any resulting submittals and approvals made available to the OMLR at the time of the Annual Report, or by separate cover. No measurable impacts to the prevailing hydrologic balance are foreseen. SECTION 2 If the operation is expected to directly affect surface or groundwater systems, the Operator/Applicant shall: Raptor Materials, LLC Cogburn Sand, Gravel, and Reservoir Project February 2025 A REGULAR IMPACT (1121 CONSTRUCTION PERMIT APPLICATION - COLORADO DIVISION OF RECLAMATION MINING AND SAFETY, OFFICE OF MINED LAND RECLAMATION RESPEc //PAGE 2 EXHIBIT G SUBSECTION A TROUGH C (a) Locate on the map (in Exhibit C) tributary water courses, wells, springs, stock water ponds, reservoirs, and ditches on the affected land and on adjacent lands where such structures may be affected by the proposed mining operations; Please refer to Exhibit C-1: Existing Conditions Map. Wells are also shown on Exhibit G: Water Information Map and a table providing well details is included as an addendum to this Exhibit G. (b) Identify all known aquifers; and The known aquifer under the site is the stream alluvium. (c) Submit brief statement or plan showing how water from de -watering operations or from runoff from disturbed areas, piled material and operating surfaces will be managed to protect against pollution of either surface or groundwater (and, where applicable, control pollution in a manner that is consistent with water quality discharge permits), both during and after the operation. Discharge water will be dissipated with hard surface riprap or established grassed waterways. Other waters are retained by internal pit drainage, directed by vegetated berms or established waterways or through the maintenance or establishment of a stabilizing cover of vegetation, or as otherwise established under an approved Colorado Department of Health stormwater permit and/or stormwater discharge permit. Stockpiling of soil, overburden, or product above the existing ground elevation will not occur in a manner understood to obstruct flood waters where they might occur within the existing floodplain. It is understood and agreed here -in that their longitudinal dimensions if they occur there should extend parallel to anticipated flood flows where they exceed a cone or other shape that might find its existence contrary to intent by volume beyond that which could be understood to be temporary, or transitory; especially outside of seasonality where flooding might be more reasonably anticipated. Information showing baseline piezometer well readings and respective locations immediately follow this page. A groundwater monitoring plan has been prepared for the Cogburn project and is attached as an addendum to this Exhibit G. SECTION 3 The Operator/Applicant shall provide an estimate of the project water requirements including flow rates and annual volumes for the development, mining and reclamation phases of the project. The three components of the project water requirements are water removed for dust control, water removed with the product, and evaporation from exposed ground water. Dust will be controlled using truck sprinklers, and the estimated frequency is one to ten loads per day depending upon field conditions. Dust will be controlled using truck sprinklers, and the estimated frequency varies daily according to seasonal influences of rain, snow, freezing, and temperatures (Refer to Seasonal Temperatures and Precipitation. At 3,000 gallons of truck capacity, the annual demand is 10.6 acre-feet. (Refer to following Chart (days of hot, freezing, rainy and snowy days derived from: https://www.bestplaces.net/climate/county/colorado/weld Raptor Materials, LLC Cogburn Sand, Gravel, and Reservoir Project February 2025 A REGULAR IMPACT (112) CONSTRUCTION PERMIT APPLICATION - COLORADO DIVISION OF RECLAMATION MINING AND SAFETY, OFFICE OF MINED LAND RECLAMATION // PAGE 3 EXHIBIT G Table 1. Project Water Requirements * not including Sundays & Holidays 3,000 gallops per Truck Dust Suppression Month Active Hot Freezing Rainy Snowy # Days # Trucks Total Trucks # gallons total gallons Total Acre Feet per year per month per Month per day Days Days Days Days' Days January 25 0 31 4 3 39 18 1 18 54,000 0.16 February 23 0 27 4 3 34 16 1 16 48,000 0.15 March _________28_____O___ April 26 0 26 14 6 8 4 2 36 24 16 17J- 2 3 34 48 _-102,000-__---- 144,000 ---_-0.31 0.44 May 25 1 2 10 0 9 14 5 70 210,000 0.64 June 26 7 0 9 0 2 24 10 240 720,000 2.21 July 25 16 0 7 0 -9 25 10 250 750,000 2.3 August 27 12 0 8 0 -4 27 10 270 810,000 2.48 September 25 4 1 7 0 4 21 5 105 315,000 0.97 October November 25 23 0 0 13 26 5_____1____ 19 34 ____19_____3______57._ 15 2 30 171,000 90,000 0.52 0.28 5 3 December 25 0 31 4 3 38 18 1 18 54,000 0.16 303 40 171 77 19 226 230 1156 Annually 3,468,000 10.6 Acre Feet 1040 Trucks .Apr -Oct = 3,120,000 90% or 9.6 Acre Feet After the water table is encountered, the water removed with the estimated 800,000 tons of product is 23.54 acre-feet per year. At the maximum potentially exposed ground water of 52.95± acres, the annual evaporation is 139.85± acre-feet. The monthly distribution of these estimates is shown in the following table. The reclamation plan provides that the pits will be lined after being mined. The lined pits will not require replacement water and will be used for storage. There may be incidental demand for water to establish vegetation on the site after lining is completed. However, the ultimate demand for water will be zero. Table 2. Water Availability MONTH November December January February March April May June July August September October PRODUCT (9.59 GAL. WATER/TO N) DUST CONTROL NET EVAPOATION Tons Af Trucks of 40,000 1.18 30 0.28 36,000 1.06 18 0.16 36,000 1.06 18 0.16 62,000 1.82 16 0.15 85,000 2.50 34 0.31 92,000 2.71 48 0.44 93,000 2.74 70 0.64 90,000 2.65 240 2.21 85,000 2.50 250 2.30 79,000 2.29 270 2.48 , 62,000 1.82 105 0.97 40,000 1.18 57 0.52 ac 52.95 52.95 52.95 52.95 52.95 52.95 52.95 52.95 52.95 52.95 52.95 52.95 x %ev 0.104 0.000 0.000 0.113 0.138 0.221 0.288 0.413 0.453 0.418 0.294 0.199 of 5.51 0.00 0.00 5.98 7.31 11.70 15.25 21.87 23.99 22.13 15.57 10.54 RAPTOR MATERIAISuc Raptor Materials, LLC A REGULAR IMPACT MA CONSTRUCTION PERMIT APPLICATION COLORADO DIVISION OF RECLAMATION MINING AND SAFETY, OFFICE OF MINED LAND RECLAMATION Cogburn Sand, Gravel, and Reservoir Project February 2025 // PAGE 4 EXHIBIT G Apr -Oct TOTAL 541,000 15.92 1040 9.56 800,000 23.54 1156 10.62 121.05 139.85 SECTION 4 The Operator/Applicant shall indicate the projected amount from each of the sources of water to supply the project water requirements for the mining operation and reclamation. Water available for supply are from Six sources; Beeline, Big Thompson, South Platte Ditch, Hayseed Ditch as decreed in Case No. 90CW174, four shares of the Rural Ditch Company as decreed in Case No. 03CW306, five shares of Last Chance Ditch Company, 26.0 shares of Godding Ditch Company, and water decreed in Case No. 01 CW274. From April through October, water use at the site will be replaced to the stream system using the historical consumptive use credits from any of the sources and/or from storage. Because storage is available to regulate the supplies, only the annual historical consumptive use for the sources is shown in the following table. Table 3. Annual Historical Consumptive Use Source Annual Consumptive Use, a -f Beeline Big Thompson & South Platte Hayseed Rural Last Chance Godding Total = 87 274 123 434 1,191 384 2,493 The storage sites are lined pits described in Case No. 01 CW274 decree. Water available under these storage decrees will also be stored and used for VCI operations. The storage facilities are listed in the following table. Those currently lined and approved by the state are 112, von Ohlen, and Dakolios. Raptor Materials, LLC Cogburn Sand, Gravel, and Reservoir Project February 2025 A REGULAR IMPACT (112] CONSTRUCTION PERMIT APPLICATION - COLORADO DIVISION OF RECLAMATION MINING AND SAFETY, OFFICE OF MINED LAND RECLAMATION // PAGE 5 EXHIBIT Table 4. VCI Storage Facilities (All Values in Acre -Feet) Reservoir Active Capacity, a -f 112 1,552 Dakolios 1,104 Von Ohlen 1,300 Kurtz 4,000 Total Dead Storage, a -f 0 0 0 0 NOT TO EXCEED 7,500 A -F PER YEAR plus refill 0 of 3,000 a -f SECTION 5 The Operator/Applicant shall affirmatively state that the Operator/Applicant has acquired (or has applied for) a National Pollutant Discharge Elimination System (NPDES) permit from the Water Quality Control Division at the Colorado Department of Health, if necessary. AColorado Wastewater Discharge Permit System Permit has been applied for with the Colorado Department of Health on November 20, 2024. The application and permit are provided as an addendum to this Exhibit. Dewatering activities are discussed in Exhibit D. The Wastewater Discharge Permit application provides information about the pump capacity and discharge rates. Section (c) of Exhibit D: Extraction Plan provides details, and the AWES report addressing dewatering is provided as an addendum to this Exhibit G. The application provides for the lining of the extracted basins (please refer to the AWES Dewatering Evaluation Report of 21 October 2024. Lining will involve the utilization of suitably derived on -site materials to meet final 3H:1 V slopes. Subsequently, the same materials may be compacted to satisfy standards for lined basins as established and governed by the Colorado Department of Water Resources Office of the State Engineer. Once operations near completion of any lined basin, the OSE will be contacted and the lined basins will be approved by the OSE prior to use. The OSE approval letter will be provided to the OMLR as a condition of the permit as evidence that the lined basin has met the specifications necessary to pass a liner test as part of the OSE approval process. Consistent with conclusion in the AWES Report, lining of the completed basins will have 'will have a de-minimis effect on groundwater hydrology.' The report continues, adding that, 'Predicted post lining head levels immediately up and downgradient of the barrier walls are within the range of normal seasonal water table elevation changes.' Raptor Materials, LLC Cogburn Sand, Gravel, and Reservoir Project February 2025 A REGULAR IMPACT 1112) CONSTRUCTION PERMIT APPLICATION - COLORADO DIVISION OF RECLAMATION MINING AND SAFETY, OFFICE OF MINED LAND RECLAMATION // PAGE 1 GEOTECHNICAL STABILITY GEOTECHNICAL STABILITY EXHIBIT SECTION 1 THROUGH 4 On a site -specific basis, an Applicant shall be required to provide a geotechnical evaluation of all geologic hazards that have the potential to affect any proposed impoundment, slope, embankment, highwall, or waste pile within the affected area. A geologic hazard is one of several types of adverse geologic conditions capable of causing damage or loss of property and life. The Applicant may also be required to provide a geotechnical evaluation of all geologic hazards, within or in the vicinity of the affected lands, which may be de -stabilized or exacerbated by mining or reclamation activities. On a site -specific basis, an Applicant shall be required to provide engineering stability analyses for proposed final reclaimed slopes, highwalls, waste piles and embankments. An Applicant may also be required to provide engineering stability analyses for certain slopes configuration as they will occur during operations, including, but not limited to embankments. Information for slope stability analyses may include, but would no be limited to, slope angles and configurations, compaction and density, physical characteristics of earthen materials, pore pressure information, slope height, post -placement use of site, and information on structures or facilities that could be adversely affected by slope failure. Where there is the potential for off -site impacts due to failure of any geologic structure or constructed earthen facility, which may be caused by mining or reclamation activities, the Applicant shall demonstrate through appropriate geotechnical and stability analyses that off -site areas will be protected with appropriate factors of safety incorporated into the analysis. The minimum acceptable safety factors will be subject to approval by the Office, on a case -by -case basis, depending upon the degree of certainty of soil or rock strength determinations utilized in the stability analysis, depending upon the consequences associated with a potential failure, and depending upon the potential for seismic activity at each site. At sites where blasting is part of the proposed mining or reclamation plan, the Applicant shall demonstrate through appropriate blasting, vibration, geotechnical, and structural engineering analyses, that off -site areas will not be adversely affected by blasting. To assure the stability of any significant, valuable, and permanent man-made structures that may exist within 200 feet of planned extraction activity, a complete and thorough stability analysis was performed by American Water Engineering Services, LLC. (AWES). Their report from October 2024 is based upon on -site samples collected from the intended areas of extraction. Copies of the AWES reports are included at the back of this exhibit. The included AWES report verifies that the maximum planned extraction slopes of 1.25H:1 V will not pose a hazard to such structures. To the extent practical, operational setbacks will be observed consistent with those detailed under Exhibit D: Extraction Plan. Grading and reclamation of completed areas of extraction will reduce extracted slopes to a minimum of 3H:1 V, or flatter, over a majority of the extraction area, in conformance with Rule 3.1.5(7). Raptor Materials, LLC Cogburn Sand, Gravel, and Reservoir Project February 2025 A REGULAR IMPACT (112) CONSTRUCTION PERMIT APPLICATION - COLORADO DIVISION OF RECLAMATION MINING AND SAFETY, OFFICE OF MINED LAND RECLAMATION RFSpEc // PAGE 1 EXHIBIT H 3EXHIBIT H � WILDLIFE INFORMATION SECTION 1 In developing the wildlife information, the Operator/Applicant may wish to contact the local wildlife conservation officer. The Operator/Applicant shall include in this Exhibit, a description of the game and non - game resources on and in the vicinity of the application area, including: SECTION 1 SUBSECTION A THROUGH C a description of the significant wildlife resources on the affected land; seasonal use of the area; the presence and estimated population of threatened or endangered species from either federal or state lists; and Wildlife residents and visitors observed on area lands include a Bald Eagle nest located approximately 0.11 miles northeast of the northern project area boundary. Other migratory birds have been seen in the area, but no nests were observed within the project area. Game species such as Mule Deer will traverse the river bottom, open spaces and fields nearby; as will fur bearers such as prairie dogs, rabbits, coyotes, raccoons, fox, skunks and other non -game species. The project area contains a habitat that could be considered suitable for the eastern black rail. However, the South Platte River drainage is not considered in the black rail's breeding range; therefore, there would be no effects on the species. No suitable habitats were found within the project area for the Preble's meadow jumping mouse. SECTION 1 SUBSECTION D a description of the general effect during and after the proposed operation on the existing wildlife of the area, including but not limited to temporary and permanent loss of food and habitat, interference with migratory routes, and the general effect on the wildlife from increased human activity, including noise. No significant impacts to wildlife or habitat loss are anticipated by planned operations due to the abundant natural conditions of the surrounding lands and general expanse of the project area. Proposed extraction areas occupy less than 50% of the affected area. As with the current use as agricultural fields, temporary displacement of wildlife may occur over the immediate area of affected lands during active operations, while on -site speed limits will be posted at 15 mph to better assure the safety of wildlife in proximity to the activity. THREATENED AND ENDANGERED SPECIES Raptor Materials engaged ERO, a natural resource and environmental consulting firm to conduct a natural resources assessment. ERO assessed the project area for habitat for Threatened and Endangered (T&E) species under the Endangered Species Act (ESA). The ERO report is provided as an addendum to Exhibit H. ERO reports that the proposed project would not directly affect Preble's meadow jumping mouse or monarch butterfly due to the lack of suitable habitat in the project area. No habitat was identified for the piping plover, whooping crane, and pallid sturgeon, nor would they be affected downstream due to depletions to the river. The project area contains habitat that would be considered suitable for the eastern black rail. However, the U.S. Fish and Wildlife Service (USFWS) currently only considers the Arkansas River drainage part of the Raptor Materials, LLC Cogburn Sand, Gravel, and Reservoir Project February 2025 A REGULAR Itv1PACT (1121 CONSTRUCTION PERMIT APPLICATION - COLORADO DIVISION OF RECLAMATION MINING AND SAFETY, OFFICE OF MINED LAND RECLAMATION REgpEc // PAGE 2 EXHIBIT H breeding range for eastern black rails and does not consider the South Platte River drainage within the black g rail's breeding range. Based on current knowledge of the black rail's distribution, there would be no effects on the species, and no further action is necessary. Best Management Practices (BMPs), Voluntary Conservation Measures and recommendations discussed with ERO will be implemented to further minimize the risk of harm to T&E and other wildlife. These measures include: • Work areas will be stabilized in a manner to prevent or minimize soil erosion. • The operator will protect the surrounding area and, from siltation. The Contractor will utilize well - established NRCS storm water and erosion management measures to control erosion, as necessary. • All temporarily disturbed areas will be reseeded with native seed mix as specified in the mine plan. The mine plan states that the "Primary Revegetation Seed Mixture combines a thoughtful mingling of predominantly native grasses of diverse height, form, color and function, to add cover, food source for wildlife and pollinators." The project will implement mine -site reclamation consisting of reseeding with native grasses and pollen producing species. • Trees along the lower terrace of the watercourses will be preserved where possible. • All riverine areas will otherwise remain untouched. • All mining areas, access routes, staging areas, and work areas will all be outside riparian areas. • The project will avoid fragmenting linear riparian corridors. • The project will avoid disturbing (e.g., crushing or trampling) or removing (e.g., cutting or clearing) all vegetation, such as willows, trees, shrubs, and grasses in riparian areas. • Impacts to all riparian habitat consisting of shrubs, grasses, and forbs will be avoided or minimized to maintain current vegetation communities and allow for habitat connectivity to habitat upstream and downstream. • Mining areas will predominantly occur with existing areas of human disturbance such as agricultural cropland, grazed pastures and roads. • Minimum 100 -foot buffers will be established between planned disturbance and the bankfull river/riparian corridor. • Traffic will be limited to existing roads and bridges to the degree possible. • Noise and dust levels for the project are regulated under the Colorado Department of Public Health and Environment. These measures are sufficient to reduce and minimize noise and dust impacts to wildlife. BIG GAME ERO reviewed data from CPW map databases and determined Mule Deer Migration Corridors and Severe Winter Range high priority habitat (HPH) areas overlap the project area. Raptor Materials per recommendation from ERO will consult with the local CPW district manager to discuss the management practices outlined below to minimize impact to Mule Deer, including potentially restricted activity in identified corridors and winter range from December 1 to April 30 should there be a need to supplement the proposed management practices. Aggregate re ate mining in general is a slow, steady progression of mining within active cells. While the cells vary in size the area actively being extracted will be generally 8 to 16 acres in size. The active extraction area will advance through the cells with concurrent reclamation taking place in the previous cell and where possible in the active cell. This incremental approach will retain open areas and opportunities for wildlife movement aid foraging within unmined areas during the life of the mine noting that proposed extraction areas occupy Raptor Materials, LLC Cogburn Sand, Gravel, and Reservoir Project February 2025 A REGULAR IMPACT ( 112) CONSTRUCTION PERMIT APPLICATION - COLORADO DIVISION OF RECLAMATION MINING AND SAFETY, OFFICE OF MINED LAND RECLAMATION REgpEC // PAGE 3 EXHIBIT H less than 50% of the affected area. Even when mining is completed and the cells transitioned to water storage, there will be ample room remaining within the existing riparian and riverine areas along the St. Vrain Creek. Deer and other wildlife will be able to freely migrate, forage, breed and complete all life requirements alcng this g 's broad migration path. The creek drainage will be undisturbed and remain open to maintain suitable ha y bitat ear -round, including severe winter weather, and provide movement corridors to the northwest of the mine area. Mining will normal) be conducted during daylight hours when wildlife is the least active. As described above, M g normally aggregate mining in general is a slow, steady progression of mining within active cells affording wildlife the g g ability t o avoid conflicts over the majority of the project area. There will be no vertical walls created by mining and each cell will also have multiple ingress and egress roads at moderate slopes for equipment. These roads will allow ample opportunity for wildlife to escape, particularly during wildlife active periods when no mining will occur. The operator has no record or evidence of trapped deer in a basin or cell at any of its aggregate operations in Colorado. There will be no fragmentation of wildlife habitat with unnecessary fencing. Existing fencing at the project sit e consists of wildlife -friendly, 3 -strand barbed wire. Raptor Materials will remove all unnecessary fencing that currently exists at the site working with ERO to identify existing unnecessary fencing, as well as fences that benefit wildlife (e.g., fencing along Weld County Roads 17 and 28 that may provide a physical/psychological obstacle to wildlife traversing dangerous roadways). Deer populations o ulations commonly traverse active resource conservations projects like these. Deer and other wildlife are commonly seen at other Colorado mining operations by truck and haul operators as they browse the vegetation at the bottom of more fully extracted basins. AGJATIC NATIVE SPECIES In the project area, St. Vrain Creek coincides with the Aquatic Native Species Conservation Waters HPH. The prese nce of water moving through St. Vrain Creek provides suitable habitat for native species. As currently designed si ned the extraction area is located outside of the limits of St. Vrain Creek. Best Management Practices , sho uld be used during construction to discourage any sedimentation or construction runoff from entering Y St. Vrain Creek. An impacts on the project area wetlands would likely require a Section 404 Permit, which may require a combination of restoration and mitigation of permanent impacts. Restoration or mitigation q could provide resiliency to the Aquatic Native Species Conservation Waters HPH area. The mine will comply will all regulations, standards, and policies of the Colorado Mined Land Reclamation Board for the protection of aquatic resources, including establishing a minimum 100 -foot buffer between plan ned disturbance and the bankfull river/riparian corridor. Furthermore, Raptor Materials has provided s tormwater BMPs and reclamation plans in the mine site application that are designed to protect aquatic resources. BALD EAGLE g A bald eagle nest is located approximately 0.11 mile northeast of the northern project area boundary and could p by be impacted b the project if a physical object or structure (i.e., surface occupancy) is proposed within the C PW-recommended 0.25 -mile radius of active nests permanently or for a significant amount of time or if there would be human encroachment activities within a 0.5 -mile radius of an active nest from December 1 through July 3. Raptor Materials, LLC Cogburn Sand, Gravel, and Reservoir Project February 2025 A REGULAR IMPACT (1121 CONSTRUCTION PERMIT APPLICATION - COLORADO DIVISION OF RECLAMATION MINING AND SAFETY, OFFICE OF MINED LAND RECLAMATION // PAGE 4 EXHIBIT H ER0 has recommended contacting the USFWS and developing a bald eagle mitigation plan to comply with the Bald and Golden Eagle Protection Act (BGEPA), Migratory Bird Treaty Act (MBTA), and 2016 USFWS Eagle Permit Rules as applicable for any activity within the 0.25 -mile nest radius. All areas of initial extraction are located outside the 0.25 -mile radius, and thus can be conducted without a bald eagle mitigation plan. Monitoring of the nest is ongoing. A mitigation plan will be prepared if deemed applicable prior to extraction within the 0.25 -mile nest radius. OTHER SPECIES OF CONCERN BLACK -TAILED PRAIRIE DOG ERO observed active black -tailed prairie dog burrows in the northern portion of the project area during the 2024 site visit. Although prairie dogs are not protected under the ESA, CPW recommends attempting to remove or exterminate prairie dogs prior to bulldozing an active prairie dog town for humane reasons. Weld County does not have any regulations or policies pertaining to prairie dogs and CPW protocol should be fol'owed. Raotor Materials will implement a voluntary prairie dog management approach that may include avoidance, passive dispersal, and/or humane lethal control. The selection of any single or combination of these techniques will be prioritized based on site -specific conditions and regulations, and the likelihood of success. ERO supports this approach as a humane and practical solution to address human -prairie dog conflicts. Because mining would be incremental in scale over the life of the project, avoidance will be the first option for most of the project area. Prairie dogs will be allowed to remain in areas not being actively reined. If on impacts prairie dogs cannot reasonably be avoided, one (or a combination) of the alternatives described p above will be implemented. Any management option selected to address prairie dogs will be conducted in a manner that is compliant with local, state, and federal regulations. \A.ESTERN BURROV_ 1NG OWL The western burrowing owl is a threatened species federally protected under the MBTA. The prairie dog bu rrows within and around the project area are a suitable habitat for burrowing owls. More than 70 percent of sightings reported in Colorado Breeding Bird Atlases were in prairie dog colonies (Colorado Bird Atlas Partnership 2016). CPW recommends a buffer of 660 feet surrounding active burrowing owl nests during the nesting season. No prairie dog burrows are located within the extents of the proposed initial area of extraction; however, burrows are present within the 660 -foot buffer. Raptor Materials will conduct a burrowing owl survey if work could occur within the recommended buffer around potential burrow locations. A burrowing owl clearance survey will be performed in the prairie dog towns that may be subjected to poisoning to prevent any harm from occurring to burrowing owls that could be within the selected prairie dog towns. Extraction occurring from November 1 through March 14 would not require clearance surveys because it would not fall within the burrowing owl nesting season. Burrowing owl management will follow required local, state, and federal regulations. SECTION 2 The application may be reviewed and commented upon by Colorado Parks & Wildlife (CPW). If CPW has comments, they must be provided prior to the end of the public comment period specified in Subsection 1.7.1(2)(a) to be considered by the Board and Office. Reserved to address comment from CPW. Raptor Materials, LLC Cogburn Sand, Gravel, and Reservoir Project February 2025 A REGULAR IMPACT [1121 CONSTRUCTION PERMIT APPLICATION - COLORADO DIVISION OF RECLAMATION MINING AND SAFETY, OFFICE OF MINED LAND RECLAMATION // PAGE 1 EXHIBIT EXHIBIT I - SOILS INFORMATION SECTION 1 In consultation with the Natural Resources Conservation Service (NRCS) or other qualified person, the Operator/Applicant rator/A licant shall indicate on a map (in Exhibit C) or by a statement, the general type, thickness and distribution of soil over the affected land. Such description will address suitability of topsoil (or other material) for establishment and maintenance of plant growth. If necessary, at its discretion, the Board may require additional information on soils or other growth media to be stockpiled and used in revegetation. Exhibit I/J- Soils & Vegetation Map identifies the type and extent of soils over the project site and surrounding lands. Areas designated for resource recovery within the extraction limits will remove all recoverable soils. A portion of the available soils will be utilized for reclamation from a portion of either existing or future soil stockpiles, or suitable in situsoils, as circumstances warrant. The balance of soils not ot herwise needed for reclamation of affected lands remaining above the anticipated static water level of the completed basins will be made available to meet the demands of the market. Interpretation of current soil conditions and vegetation suitable for reclamation relies in part on information and correlated available data from the U.S. Soil Conservation Service (SCS) Soil Surveys and updated digital information of the same by the renamed U.S. Natural Resources Conservation Service (NRCS). Range Site Descriptions (uniquely designated for each Soil Unit as shown by number and boundary on Exhibit I/J - Soils & Vegetation Map) and other related soil and ecosystem information taken from these publications. The g p NRCS generated for the permit area is attached as an addendum to this exhibit. SOIL LEGEND of on -site soils (Refer to Exhibit I/J - Soils & Vegetation Map): Soil Unit #1. Altvan loam, 0-1% slopes; capability subclass IIIE irrigated &IVE non -irrigated; loamy plains range site description [H1 horizon = 0-10" depth] Soil Unit #3. Aquolls & AquentsL.gravelly substratum, capability subclass none specified irrigated & VIW non -irrigated; salt meadow range site description [H1 horizon = 0-48" depth] Soil Unit #10. Ellicott -Ellicott sandy -skeletal complex, 0-3% clay slopes, rarely flooded; capability subclass IVE irrigated & viis non -irrigated; sandy bottomland range site description [A p Y horizon = 0-4" depth] Soil Unit #13. Cascajo gravelly sandy loam, 5-20% slopes; capability subclass none specified irrigated & VIIS non --irrigated; gravel breaks range site description [H1 horizon = 0-9 depth] Soil Unit #27. Heldt silty clay, 1-3% slopes; capability subclass IIIE irrigated & IVC non -irrigated; clayey plains range site description [A horizon = 0-12" depth] Soil Unit #41. Nunn clay loam, 0-1% slopes; capability subclass 3E irrigated & IVE non -irrigated; clayey pines range site description [AP horizon = 0-6"1 Raptor Materials, LLC Cogburn Sand, Gravel, and Reservoir Project February 2025 A REGULAR IMPACT 11121 CONSTRUCTION PERMIT APPLICATION - COLORADO DIVISION OF RECLAMATION MINING AND SAFETY, OFFICE OF MINED LAND RECLAMATION //PAGE 2 EXHIBIT Soil Unit #47. Olney fine sandy loam, 1-3°/0 slopes; capability subclass IIIE irrigated & IVC non - irrigated; sandy plains range site description [H1 horizon = 0-101 Soil Unit #51. Otero sandy loam, 1-3% slopes; capability subclass IIIE irrigated & IVE non - irrigated; sandy plains range site description [H1 horizon = 0-121 The attending narrative descriptions in the included Soil Survey addendums and extracts, detail the native soils, vegetations, and associated ecological conditions likely prevalent over unaltered lands of like kind, and as they might present themselves over the identified parcels. The identified vegetation is an indicator of what did, or may, grow on the represented soils under native undisturbed soil conditions. This information is utilized to create the seed mixture(s) proposed under Exhibit L - Table L-1: Primary/Preferred Revegetation Seed Mixture. The species selected for reseeding are selected as offering the best genetic potential for establishment of a diverse and enduring stabilizing cover in the reclamation and restoration of the affected lands. The affected soils in the proposed extraction areas are designated under the soil survey to fall predominantly under Unit 3: Aquolls and Aquents, gravelly substratum; and Unit 41: Nunn clay loam, and minor components of Unit 1: Altvan Loam. Unit 3 and Unit 41 soils are considered as having potential with appropriate water management as being prime farmland and so well suited to the establishment and maintenance of plant growth in reclamation. While Unit 1 soils are not considered potentially as prime farmland, this unit occupies a lesser portion of the proposed extraction area however of note, the area has been demonstrated to adequately support agriculture. Soil salvage will commence with the removal of the surface layer of soil to a mean depth of 6.0± inches, depending upon equipment and equipment operator limitations. Additional depths of soil (to the extent it occurs) will be removed in a like manner until commercially viable overburden and aggregate are reached, unless already exposed as a result of poor soil development or flood based deposition. Soil salvage will be conducted primarily with excavators, but may include other heavy equipment such as bulldozers as warranted. To minimize the undesirable effects of soil blowing and loss, and to avoid damage to the soil resource via compaction, soil will be stripped wherever possible when soil is moist, and not dry or wet. Any portion of the salvaged soil suitable for plant regrowth will be utilized to meet the minimum depth of soil replacement for reclamation, with the excess made commercially available for export from the property. Generally, soil will be retained in sufficient volume to reclaim all lands remaining between the anticipated static water level of the basins and existing access roads which surround them at any given point in time during resource recovery operations. Once removed from its native location, soil retained for reclamation will be stockpiled over the northern corner of Pit P125A, in areas above the floodplain; or otherwise windrowed along the perimeter of the basin area of extraction or area to be resoiled and seeded with the reclamation seed mixture specified under Exnibit L - Table L-1: Primary/Preferred Revegetation Seed Mixture, or as otherwise determined under an approved revision. Stabilization of inactive soil stockpiles will provide an opportunity to gauge the performance of the seed mixture while attempting to provide a stabilizing cover of vegetation over the stockpiled soil until it is ready for replacement on finished slopes and affected lands remaining above the amicipated static water level of the completed reservoir basins. RAPTOR MATER1ALSuc Raptor Materials, LLC Cogburn Sand, Gravel, and Reservoir Project February 2025 A REGULAR IMPACT (1121 CONSTRUCTION PERMIT APPLICATION - COLORADO DIVISION OF RECLAMATION MINING AND SAFETY, OFFICE OF MINED LAND RECLAMATION //PAGE 1 EXHIBIT J EXHIBIT J - VEGETATION INFORMATION SECTION 1 The Operator/Applicant shall include in this Exhibit a narrative of the following items: SUBSECTIONS AAND 6 descriptions of present vegetation types, which include quantitative estimates of cover and height for the principal species in each life -form represented (i.e., trees, tall shrubs, low shrubs, grasses, fortis); the relationship of present vegetation types to soil types, or alternatively, the information may be presented on a map; and The vegetation in the project area includes alfalfa (Medicago sativa), western wheatgrass (Pascopyrum smithii), cheatgrass (Bromus tectorum), flixweed (Descurainia sophia), squirreltail (Elymus elymoides), little hogweed (Portulaca oleracea), pigweed (Amaranthus species), and kochia (Bassia scoparia) (see photos1-3 in ERO report included as an addendum to Exhibit H). The riparian community contains species such as plains cottonwood (Populus deltoides spp. monilifera), peachleaf willow (Salix amygdaloides), smartweed (Persicaria amphibia), curly dock (Rumex crispus), and Pennsylvania bittercress (Cardamine pensylvanica) (see photos 6-7 in ERO report included as an addendum to Exhibit H). In the project area, 5 wetlands are in the northern portion and 27 agricultural ditches run through the southern portion (see photos 4-9 and Figure -2 in ERO report included as an addendum to Exhibit H). The agricultural ditches only flow when flood irrigation occurs to support the alfalfa fields in which they are located. AgDitch1 through AgDitch12 drain southwest back into Last Chance Ditch. AgDitch13 through Ag Ditch26 drain northwest into Wetland 5 and eventually into an unnamed tributary to St. Vrain Creek. Wetland 1 and Wetland 2 drain into an unnamed perennial tributary to St. Vrain Creek and then into St. Vrain Creek. Wetland 3 and Wetland 4 are located in an oxbow channel of St. Vrain Creek and drain to St. Vrain Creek. Wetland 5 drains into an unnamed tributary to St. Vrain Creek. The 27 agricultural ditches were determined to be excluded from Waters of the United States in a Jurisdictional Determination provided by the US Army Corps of Engineers on December 17, 2024. The current crop and pasture areas along with areas of more natural vegetation can be observed in the aerial photo imagery included in Exhibit I/J - Soils & Vegetation Map. The currently proposed extraction areas have excluded the areas currently mapped as wetlands. The 27 unnamed agricultural ditches used for agricultural irrigation are in the southern portion of the project area. Agricultural ditches are typically exempt and considered non -jurisdictional. A Wetland Jurisdictional Determination Application was submitted concerning these 27 ditches to USACE on November 6, 2024. If the wetlands or unnamed agricultural ditches are considered jurisdictional, before work is planned and permitted by Technical Revision in any of these areas, a Section 404 Permit would be required from the Corps for the placement of dredged or fill material in wetlands or below the ordinary high water mark. RAPTOR MATE RIALSuc Raptor Materials, LLC Cogburn Sand, Gravel, and Reservoir Project February 2025 A REGULAR IMPACT (112) CONSTRUCTION PERMIT APPLICATION - COLORADO DIVISION OF RECLAMATION MINING AND SAFETY, OFFICE OF MINED LAND RECLAMATION // PAGE 2 EXHIBIT SUBSECTION C estimates of average annual production for hay meadows and croplands, and carrying capacity for range lands on or in the vicinity of the affected land, if the choice of reclamation is for range or agriculture. The choice of reclamation is developed water resources not range or agriculture; therefore annual production for hay meadows and croplands is not applicable. SECTION 2 The Op erator/Applicant shall show.the relation of the types of vegetation to existing topography on a map in Exhibit C. In providing such information, the Operator/Applicant may want to contact the local Soil Conservation District. The soil units, current crop and pasture areas along with areas of more natural vegetation can be observed in the aerial photo imagery included in Exhibit C-2 — Extraction Plan Map and Exhibit I/J - Soils & Vegetation Map. Raptor Materials, LLC Cogburn Sand, Gravel, and Reservoir Project February 2025 A REGULAR IMPACT i 1121 CONSTRUCTION PERMIT APPLICATION - COLORADO DIVISION OF RECLAMATION MINING AND SAFETY, OFFICE OF MINED LAND RECLAMATION // PAGE 1 EXHIBIT K EXHIBIT K - CLIMATE SECTION 1 Provide a description of the significant climatological factors for the locality. The following climatic data is extracted from the Prism Climate Group managed by Oregon State University. The climate of Weld County, Colorado has summers that are warm with clear skies and winters that are snowy with some cloud cover. The minimum and maximum temperatures typically range from 14.0°F to 90.0°F with MaY normally having the highest amount of precipitation. The following figure summarizes average minimum and maximum temperatures and precipitation from 2013 to 2023 in Weld County. We Colorado Climate Sur�maryDa�.a From 2013 to 2023 Weld 80 70 60 50 L ca 40 L E 30 s-- 20 10 0 2022 2023 2013 2014 2015 2016 2017 2018 2.010 2020 Years Avg Min Temp (°F) Avg Max Temp (°F) Precipitation (inches) Figure 1. Climate Summary Data for Weld County, Colorado from 2013 to 2023 The warm season lasts approximately four months from June to September, with average daily high temperatures eratures above 71.0°F. The hottest month is July with an average high of 89.1°F and an average low of 57.4 °F. The cold season last approximately four months from November to February, with average daily high temperatures below 45.0°F. The coldest month is January with an average low of 14.0°F and average high of 42.2°F. 25 20 15 10 5 0 2021 Februa 2025 Raptor Materials, LLC Cogburn Sand, Gravel, and Reservoir Project A REGULAR IMPACT (112) CONSTRUCTION PERMIT APPLICATION COLORADO DIVISION OF RECLAMATION MINING AND SAFETY, OFFICE OF MINED LAND RECLAMATION // PAGE 1 EXHIBIT L EXHIBIT L - RECLAMATION COSTS SECTIONS 1 AND 2 All i necessary to calculate the costs of reclamation must be submitted and broken down into the n rY various or ma1jphases of reclamation. The information provided by the Operator/Applicant must be sufficient to calculate the cost of reclamation that would be incurred by the state. The Offi ce may request the Operator/Applicant to provide additional, reasonable data to substantiate said q Operator/Applicant's estimate of the cost of reclamation for all Affected Lands. SUMMARY OF RECLAMATION COSTS, PARAMETERS, AND APPROACH Ti ts s reclamation cost estimate has been performed for the initial projected 5 years of Operations at the Pg 125 Co burn site, with the intent of adjusting the Financial Warranty as needed in future Technical Revisions or adjustments to the projected Life of the Operation, if any. The current projected Life of Mine, detailed later in this Exhibit, including reclamation, is 10-11 years. A summary of project costs is presented below. Costs are separated into operational tasks (direct costs - Table 1) and insurance, bonding, project management, engineering, legal, and administration (indirect costs - Table 2). Indirect costs are calculated as a percentage of either the direct costs or the number of hours to complete tasks. Table 1. Reclamation Direct Cost Summary Task Cost C IRECT COSTS Dewater pit - initial pumping Dewaterpit-continual pumping Grade slope under liner Haul liner material from to pit area Mix material for liner Compact liner Haul subsoil from stockpile to pit to grade over liner Grade subsoil over liner Haul topsoil to pit area Spread topsoil on reservoir bank Seed banks of pond Demo and remove concrete and conveyor Mobilization and Demobilization 57,906 $1,595 $3,570 519,050 52,675 52,343 S 127,089 544,139 54,937 51,521 515,212 59,975 $10,000 Raptor Materials, LLC Cogburn Sand, Gravel, and Reservoir Project February 2025 A REGULAR IMPACT (112) CONSTRUCTION PERMIT APPLICATION - COLORADO DIVISION OF RECLAMATION MINING AND SAFETY, OFFICE OF MINED LAND RECLAMATION //PAGE 2 EXHIBIT L SUBTOTAL DIRECT COSTS: $250,069 Table 2. Reclamation Indirect Cost Summary Item Percentage of[Cost/Hours] Cost INDIRECT COSTS— OVERHEAD AND PROFIT Liability Insurance Performance Bond Job Superintendent Profit - •- •-• •r..r• rw'..••••••n!iarre5 ,""1"-"""ersrt sire: tt,•-•_•-•�r:s, .:.-, • _ ^s I -r.. i :' INDIRECT COSTS— LEGAL, ENGINEERING, PROJECT MANAGEMENT Fnancial Warranty Processing 2,02% [DC] 1,05% [DC] 50% [Total Job Hours]* 10°/o [DC] 5,051 2,626 20,969 25,007 N/A (legal) Engineering/contract/bid 6% [DC + 0&P] Reclamation Mgmt/Admin 4,5% [DC + 0&P] 500 118,223 X13,668 'i.!%_-Y-•'� :-tom SUBTOTAL INDIRECT COSTS; $86,004 *Job hours for this project are estimated at 558 hrs, with a superintendent hourly rate of $75.13, based on the September 2024 DP,MS Cost Estimate for the P124 Two Rivers (M2022-013) project The Grand Total Financial Warranty Amount- $336,114 ® is pending DBMS review and their cost estimate, including expenses ensesforthe State of Colorado Mobilization and Demobilization and other Indirect Cost p determinations by the DEvision. For futur e reference, the ultimate project dimensions that will be used at the end of the current projected Life of Mine are summarized in Table 3. Table 3. Total Proposed Affected Lands and Reclaimed Features Measurements Entity Pit P125_S1 Pit P125A Pit P125B Combined Extraction -finished basin (Acres) Static Water Area — surface (Acres) Static Water Area - elevation (ft.) Basin Lands Above Static Water Level (Acres) Basin Area Volume (cu.yds.) Static Water Level Volume (Gallons) Static Water Level Volume (Acre Feet) 10,4 N/A N/A N/A N/A N/A N/A 22.1 13,5 4,785 8.6 493,483 99,670,836 305,9 38.3 70,8 32.0 45,5 4,782 6.3 14,9 556,797 112,458,593 345.1 1,050,281 212,129,430 651,0 NOTE : All lands within the 196.4± acre permit area are considered as affected lands under C.R.S. 34-32.5- () respective 103 1 of this permit application and any subsequent permit revisions or amendments to the permit a originally pp s on inall approved. Previously affected ground prior to the onset of Operations under this permit Raptor Materials, LLC Cogburn Sand, Gravel, and Reservoir Project February 2025 A REGULAR IMPACT (112] CONSTRUCTION PERMIT APPLICATION - COLORADO DIVISION OF RECLAMATION MINING AND SAFETY, OFFICE OF MINED LAND RECLAMATION RESPEc // PAGE 3 EXHIBIT L wilt not be reclaimed under the terms of this permit unless otherwise re -affected beyond their original state. Puolic Lands and other easements and rights -of -way are offset from operations and while they may fall within the 196.4± acre parcel — are excepted from the permit conditions to the extent of their approved setbacks. The following estimates use assumptions based upon the pre -disturbed state of the application for purposes of determining estimated costs of reclamation and correlated financial warranty. Where appropriate, information is generalized and approximated from similar estimates determined by the Division of Reclamation, Mining and Safety (DRMS), as indicated. Based upon the Extraction and Reclamation Plans of this application, the status and trend of activities and affected land, and related calculations to estimate reclamation liability, are determined as follows. Please Note: Due to the difficulty of calculating heavy equipment costs similar to the Division's software program, unit costs from previous and reasonably current Division estimates of like or similar kind have been used to create a reasonably close estimate. The per unit basis from Division records are shown in the calculation tables throughout this Exhibit, Before concurrent grading, re -soiling, and revegetation for reclamation can commence, a perimeter keyway (dewatering trench) must first circumnavigate the area where the perimeter slopes form along the extraction limits. For the Cogburn site, this includes three sequential areas of extraction: • 10.4± Acres — Pit P125_S1 - South pit • 22.1± Acres — Pit P125A — Eastern pit • 28.2± Acres — Pit P125B — Central pit Exhibit L — Financial Warranty Map shows Initial Extraction as a yellow hatch area, comprising 60.7± acres. Extraction will begin in the southwest corner of Pit P125_S1 and establish a keyway along the western pit boundary, then advance northeastward. Initial Extraction will then progress through Pit P125A, then P125B, as indicated by the arrows on the map. Discharge points from all three pits shall be adjacent to the settling basin, planned to be located outside the southwest corner of Pit P125A. There is a tank battery located at the southeastern border of Pit P125_S1; approximately 1,360 feet of oil and gas pipeline located between Pits P125_S1 and P125A, and one abandoned oil and gas well each (two to_al) within the extraction extents of Pits P125A and P125B, both of which are pending removal. Extraction will not occur within the setbacks detailed in Exhibit D - Extraction Plan. Perimeter keyway extraction will maintain a perimeter slope no steeper than 1.25H:1 V, except for depths greater than 30 feet below ground surface (bgs), which will be lined and backfilled at 3H:1 V following extraction (refer to the Slope Stability Analysis addendum for additional information). At the toe of the cut perimeter slope is the keyway that runs below the extracted deposit of the basin, into the bedrock, which allows the subsurface waters to flow to the settling basin and discharge pumps necessary to keep the cut basin dry during a time of extraction and reclamation of the affected perimeter slopes. The keyway dimensions may vary from 4± to 8± feet in depth and 4± to 16± feet in width. Extraction must be broad enough to allow equipment to safely approach the toe and excise the bed dimensions where the resulting channel is sufficient to convey the groundwaters to the settling basin for discharge. Raptor Materials, LLC Cogburn Sand, Gravel, and Reservoir Project February 2025 A REGULAR IMPACT (112) CONSTRUCTION PERMIT APPLICATION - COLORADO DIVISION OF RECLAMATION MINING AND SAFETY, OFFICE OF MINED LAND RECLAMATION // PAGE 4 EXHIBIT L Please Note: The graphic representation of the Initial Extraction Area and directions are idealized and may vary in shape and size presented. Annual Reports will report on the nature and extent of affected lands and more properly reflect actual conditions on the ground in a given year of operations. The life of the operation is based upon a base rate of extraction approximating 800,000 tons of material extracted in a given year. This extraction rate will shift with the market and may average 800,000± acres but could be faster or slower. Starting out, initial warranty necessary to cover the costs of reclamation for the extent of disturbance in a given year will also vary in time and circumstance, as the initial disturbance is generally less at the onset. So, a rate of disturbance can be estimated and the warranty adjusted incrementally with time and circumstance. Starting out in the initial projected 5 years of Operations, and incrementally thereafter, necessary warranty can be estimated and adjusted in incremental Units based upon the projected Life of the Operation. Essentially, a 5-6± year Life of Operations assumes a rate of extraction of approximately 800,000 tons per year. Considering the Mining -Regrading Schedule included as Table E-1 in Exhibit E, and the general development concept shown on Exhibit L - Financial Warranty Map, Raptor estimates for the initial 5 -year period, development of an initial 60.7 -acre excavation across Pits P125_S1, P125A, and P125B will result in creation of approximately 12,149 feet of external perimeter pit wall. During the same time period, Pit P125_S1 will be backfilled; P125A will be fully reclaimed; and P125B will have depths 25 ft bgs and greater lined, and depths 30 ft bgs and greater backfilled at 3H:1 V. No reclamation or lining at shallower depths than those previously stated is anticipated in Pit P125B in the initial 5 -year period. It is important to note that the financial warranty estimates the closure cost of the operation at the end of the expected first 5 -year period. It is assumed in this initial estimate that no reclamation activities (regrading, topsoiling) will take place. The cost estimate then reflects reclaiming the projected excavation at that point in time. The actual extents and shape of the excavation may change, and actual progress will be addressed in the annual reports. Raptor will update this Exhibit L, the reclamation cost estimate, and any other exhibits as required for purposes of determining financial warranty prior to disturbance reaching the limits projected in the initial 5 years of Operations as described in this Exhibit and shown conceptually on Exhibit Maps C-2 and L. In the following breakdown of components for estimating reclamation cost, factoring of the 5 -year projected disturbance against the final pits is used where appropriate to obtain a reasonable estimate of work required. Various approaches to obtain the necessary quantities exist, but Raptor believes the approaches and quantities are reasonable and alternate approaches would be no more certain as to the accuracy obtained. This is simply due to the variable nature of the deposit and the need to field -fit the excavation to ensure safety in the conditions encountered. DEWATERIND Raptor assumes at the 5 -year mark, Pit P125A will have been fully regraded, lined, and backfilled, and therefore will not require any further reclamation work below the static WSEL. Pit P125B will be in an unlined state and would recharge to static water level requiring dewatering of the pit to allow reclamation operations RAPTOR MATERIALSuc Raptor Materials, LLC Cogburn Sand, Gravel, and Reservoir Project February 2025 A REGULAR IMPACT (112] CONSTRUCTION PERMIT APPLICATION - COLORADO DIVISION OF RECLAMATION MINING AND SAFETY, OFFICE OF MINED LAND RECLAMATION RESP Ec // PAGE 5 EXHIBIT L to be completed. The reservoir volume for P125B for the 5 -year condition was calculated a 3D computer - aided design (CAD) program using the stage -storage curves for the static water surface elevations (WSELs) ( listed in Table 1. Determination of static WSELs for each pit is detailed in Exhibit D — Extraction Plan. Table 4. Initial Dewatering Cost Estimate Pit Reservoir Vol (WSEL = 4,782') [gal] Unit Discharge Cost [$] Total Job Cost [$] P125B 73,884,623 0,000107 7,906 Following initial dewatering, a 30 -day dewatering need was assumed for completion of lining and regrading. A 30 -day continuous dewatering volume was calculated based on the individual pit inflow estimate provided in the AWES Dewatering Estimate memo dated October 28, 2024 (attached as an addendum). As Pit P125B will not be fully extracted at the 5 -year mark, inflow was reduced proportionally to the length of pit wall that will be exposed at year 5. Table 5, 30 -Day Continuous Dewatering Cost Estimate Pit Inflow [MGD] Pit wall length [ft] Pit wall length exposed [ft] % of Tot Inflow Inflow over 30 days [gal] P125B 0.56 5,963 5,290 88.71 14,903,907 Unit Cost: 0.000107 Total Job Cost: $1,595 The total dewatering cost (initial plus continuous) is estimated at $9,500. During dewatering, the basins will be lined or otherwise segregated from the area groundwater, to liberate the water otherwise retained to supplement loss from evaporation in the unlined state. LINER At the 5 -year mark, liner will have been keyed into the base of the Pit P125B side walls at depths greater than 30 feet and installed up to 25 feet bgs, as detailed in Exhibit E — Reclamation Plan. Pit P125_S1 will be completely backfilled and Pit P125A will be regraded, lined, and backfilled. Liner installation was separated into p Y four stages for the purposes of cost estimation: grading the slope under the liner, hauling liner material to the pit area, mixing material for the liner, and compacting the liner. The surface required to be regraded was assumed to be from either the base of the pit where no interim liner exists, or above the existing base liner where installed, to the top of the pit wall, at a thickness of 1 foot. Liner material was assumed to be installed at a thickness of 4 feet on the slope with a 4 -foot -by -4 -foot keyway wnere applicable to a height of 5 feet bgs. Half of the liner material was estimated to require mixing; all the liner material was assumed to require compaction. SJrface areas for wall to be regraded and liner installation were measured based on the above -described mining plan, further detailed in Exhibit D — Extraction Plan, for the 5 -year mining condition surface in a 3D CAD P125B pit bottom elevations 30 feet bgs or shallower were measured to determine remaining program. ke wa length to be installed; these sections are indicated on Exhibit L — Financial Warranty Map. As material keyway g RAPTOR MACERIALSac Raptor Materials, LLC Cogburn Sand, Gravel, and Reservoir Project February 2025 A REGULAR IMPACT 1112) CONSTRUCTION PERMIT APPLICATION - COLORADO DIVISION OF RECLAMATION MINING AND SAFETY, OFFICE OF MINED LAND RECLAMATION RESPEc // PAGE 6 EXHIBIT L is expected to expand during grading and mixing, a swell factor was applied to these volumes. Likewise, a shrinkage factor was applied to the material volume for compaction. Calculation of the regrade and liner material volumes required for reclamation is presented in Table 4 below. Table 6. Regrade and Liner Volume Calculations XS Keyway Area Material Vol Activity Wall Area [sq.ft] wall Depth [ft] Keyway Length [ft] [s4 ] [cu.ft] Regrade 157,078 1 N/A N/A 157,078 479,347 Liner 100,301 4 4,884 16 Material Vol [cu.yd] 5,818 17,754 Haul distance was calculated as an average of the of the distance of liner sources to the site: 3,919 feet from the P115 Kurtz site (M1999-006), 2,836 feet from the P122 Bearson site (M2015-003), and 415 feet from on - site sources, for an average haul distance of 2,390 feet. The source deposits contain extensive materials suitable for use in constructing the liner including shale, claystone, clay, sandstone-claystone--siltstone and sandstone-siltstone bedrock, clay lenses in the sand and gravel deposit, and overburden often comprised of low plasticity sandy silty clay to silty sand. Excess topsoil has also been successfully used as a liner construction material and could be used if excess material is available. Typical liner installation as described in Exhibit E - Reclamation Plan is shown on Figure 1 and Figure 2 below, which indicate dimensions used in the calculation of regrade area and liner and backflll volumes for this cost estimate. 44,44m. 4,00 • 1 • 0 I I • I ▪ • • 1 • f '• • 1111.1.• • •• • • • 1• I • •11111,,•'•• ••. •• •••' • ♦ • • I • •I . 1101••.•1••• ' • • • y•• • • • ••'''• •• •1•1 e I t I•• 1 •1 1 1.1 ••• ,r,1'•,•• , • •• • • , 1.'11 1••,: . ; •1• • ••• • • •• • • • • . • •• Topsoil ••••••••••••. .• \r.n•ar..ti Liner 'length of regraded ` slope 1 • _ \ ♦• •, . ••f <• • • • • •••1'. • Original ground surface .�� :1.1.0..1.,......... �•. /YyL••/••�••R/ r•/. w• • ' wl'+F ••hJM•/1.••w•.w•+•Y.•YYi•I•I`tY.IY.•�r•1JY•!�•'M- t.S%• �t..••w•y ' t ♦MnM w"•ivJw�% JZiM•I•r.. �•NI••Ij',�S�^�..n^^•.Ti�»-v.- r.•ti�..•r.y+s..�. 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L y� '•.•.••••'%.�•4Y`•J••i•• VN✓i.•+.••rN ^`/•Jw n•t :t.J\ �WM}\�w �f l•l i•L•�•••.•`•�, J�% ti•I•tj...r•.KV•wN~~N Afih• �•/•�M/•r.Mf•I..••.r _ YYrw•M1-•V�•Y�••/1•�•Y\J••M�•t•Yl�.••.•�11.L�r��t•��•Y.•�.�rr`•••I \•`••�.�I••L.N•�� 4 a....••••••••••••••••••••••••••••••••••• ..... ••••1•\/'•••.•••••••\••• i`` 7 1- 1` 7 '.�tS�4 A-,1 i ~ Z 1)11%1+1%) I,ii7� 1 1��>_> `�� /��,� A�,� .• ��_. . ` V., •• • S Keyway '�� ' �`�,� �»^�.� Bedrock �=��-s».�;? �'z�� Z . `� - ti � .�.i X111 ;S:ti> ` ` .�: Figure 1, Typical Fully Reclaimed Liner and Backfill Construction for Wall Depths Shallower than 30 ft RAPTOR MATERIALSuc Raptor Materials, LLC Cogburn Sand, Gravel, and Reservoir Project February 2025 A REGULAR IMPACT (1121 CONSTRUCTION PERMIT APPLICATION - COLORADO DIVISION OF RECLAMATION MINING AND SAFETY, OFFICE OF MINED LAND RECLAMATION A ESpE C // PAGE 7 EXHIBIT L 30 -ft Fully reclaimed liner Unexcavated Perimeter Wall (slope 1.25H:1V) . . •....,..•.•. Prelimina Liner ti •t'. - %k ti ->�>�� >"�`S ��~L``�'�`�?1��_��>La"-`��: Sri>.�s ;:.•��»;ti•:1•'�?..'>. `_.. �'��, Z_, � ._, > , _._, Original ground surface r ully reclaimed backfill material (3H:1V) Backfill (regraded) slope at 3H Sequence 1. In cycles • Install liner in 6" lifts • Backfill to 3H:1V 2. Replace topsoil Preliminary backfill material -�: r. -a! *�—'.._-� �•.�•.P-: t•: � '�.`'f 'J.ti;.!.,.'.•. •- - _.'•".5� ..1,04:1 j • a�,� 1,1� �1 �>ti•� ••�� `.� �,h�,{� it >�•Keyway.,,.��.;>j�, �►; 1 :.,i•;;'i`.1>≥,'�;;�:�_.�Bedrock;•.,�► ti 1�. , �. ��,,`,_ Figure 2. Typical Fully Reclaimed Liner and Backfill Construction for Wall Depths Greater than 30 ft Haul distances from stockpiled backfill materials are expected to be very short, with temporary stockpiles strategically placed near areas that will require regrading as excavation advances. Unit costs were taken from the recent DRMS-provided P124 Two Rivers (M2022-013) cost estimate. Calculations for the individual lining component costs are provided in Table 5 below. Table 7. Reclamation Liner Installation Cost Estimate Activity Initial Vol [cu.yd] Swell/Compaction Factor Loose/Compacted Vol [cu.yd] Unit Cost [$/cu.yd] Total Job Cost Grade 5,818 Haul 17,754 Mix 8,877 Compact 17,754 1.215 N/A 1,215 0.91 7,069 17,754 10,785 16,156 $0.505 $3,570 $1.073 $19,050 $0.248 $2,675 $0.145 $2,343 Total Liner Cost: $27,637 CACKFILL At the 5 -year mark, liner will have been keyed into the base of the Pit P125B side walls at depths greater than 33 feet and installed up to 25 feet bgs. Pit P125_S1 will be completely backfilled and Pit P1 25A will be regraded, lined, and backfilled. Within Pit P125B, only walls with depths greater than 30 ft bgs will have been backfilled at 3H:1V from pit bottom up to 25 ft bgs, as detailed in Exhibit E - Reclamation Plan. Backfill was separated into two stages for the purposes of cost estimation: hauling subsoil from source(s) to Pit P125B to grade over the liner, and grading the subsoil. Surfaces were created for the 5 -year and reclaimed conditions in a 3D CAD program for Pit P125B; backfill volume required for reclamation was determined to be the difference between these two surface volumes. Backfill will be achieved using a combination of imported material from nearby sites P115 Kurtz (M1999-006) and P122 Bearson (M2015-003), which will be strategically staged for backfill use as reclamation progresses, RAPTOR MATERIALSuc Raptor Materials, LLC Cogburn Sand, Gravel, and Reservoir Project February 2025 A REGULAR IMPACT [112) CONSTRUCTION PERMIT APPLICATION - COLORADO DIVISION OF RECLAMATION MINING AND SAFETY, OFFICE OF MINED LAND RECLAMATION REgpEC // PAGE S EXHIBIT L and onsite material, resulting in very short on -site push distances. As backfill material will be sourced from the same locations as the liner material, the estimated average haul distance is the same: 2,390 feet. Backfill will be placed and graded from the ground surface to the pit bottom to create finished 3H:1 V slopes for the entire Pit P125B. Similar to material excavated for lining, material excavated for backfill is expected to swell and is therefore assigned a swell factor for cost estimating purposes. The backfill concepts for walls shallower and deeper than 30 feet bgs is portrayed in Figure 1 and Figure 2 in the preceding subsection: Liner. The cost estimate for backfilling Pit P125B, summarized in Table 6 below, is based on unit costs taken from the recent DRMS-provided P124 Two Rivers (M2022-013) cost estimate. Table 8. Reclamation Backfill Cost Estimate Swell/Compaction Loose/Compacted Unit Cost [$/cu.yd] Total Job Cost Activity Initial Vol [cu.yd] Factor Vol [cu.yd] Haul Grade 120,692 120,692 N/A 1.215 120,692 $1.053 $127,089 146,641 S0.301 $44,139 Total Backfill Cost: $171,227 TOPSOIL Topsoil demand will be limited to the cut basin slopes remaining above the static water level for pits reclaimed as reservoirs (P125A and P125B) and to the entirety of the backfilled disturbed surface for Pit P125 S1. Topsoil will be placed at a depth of approximately 6 inches over both even ground and cut slopes and seeded with a cover of stabilizing vegetation, as detailed in Exhibit E — Reclamation Plan. At the 5 -year mark, Pit P125_S1 is expected to have been completed backfilled, re -soiled, and revegetated; Pit P125A is expected to be lined, backfilled, re -soiled, and revegetated. Therefore, the only remaining area to receive topsoil should be the cut slopes reclaimed at 3H:1 V above the static water surface elevation (4,782') in Pit P125B. Determination of the static WSEL is detailed in Exhibit D — Extraction Plan. The cut slope surface area above the static WSEL was calculated from the P125B reclaimed surface in a 3D CAD program. pp Topsoil application was separated into two stages for the purposes of cost estimation: hauling topsoil from p the stockpile to Pit P125B, and spreading topsoil on the banks. Similar to material excavated for backfill, topsoil is expected to swell and is therefore assigned a swell factor for cost estimating purposes The cost p estimate for top soiling the exposed cut slopes of Pit P125B, summarized in Table 7 below, is based on unit costs taken from the recent DRMS-provided P124 Two Rivers (M2022-013) cost estimate. The average haul route distance from the topsoil stockpile in the north corner of Pit P125A to the banks of Pit P125B was estimated at 2,130 feet. Table 9. Topsoil Application Cost Estimate Exposed P125B S.A. Topsoil Initial Vol Swell/Compaction Loose/Compacted Unit Cost Total Job Activity p Factor Vol [cu.yd] [$/cu.yd] Cost above WSEL [sq.ft] Depth [ft] [cu.yd] -Haul Grade 248,445 0.5 4,601 N/A 248,445 0.5 4,601 1.215 4,601 $1.073 $4,937 5,590 $0.272 $1,521 Total Topsoil Application Cost: 6,457 RAPTOR MATERIALSuc Raptor Materials, LLC Cogburn Sand, Gravel, and Reservoir Project February 2025 A REGULAR IMPACT (112) CONSTRUCTION PERMIT APPLICATION - COLORADO DIVISION OF RECLAMATION MINING AND SAFETY, OFFICE OF MINED LAND RECLAMATION ESpEc // PAGE 9 EXHIBIT L REVEGETATION Revegetation will occur following placement of topsoil on disturbed areas remaining at the time of reclamation. As described in the above subsection, Topsoil, only reclaimed slopes above the static water surface elevation in Pit P125B will be disturbed at the 5 -year mark. Seeding will therefore occur over the same exposed area as described in more detail in Exhibit E - Reclamation Plan, and according to seed mixes and application methods presented in Table L, attached as an addendum to this Exhibit. The cost estimate for revegetation, which assumes a 25% initial failure rate that will require re -seeding, is based on unit costs taken from the recent DRMS-provided P124 Two Rivers (M2022-013) cost estimate and i5 presented in Table 8 below. This unit cost includes the cost of seed and fertilizer, their application, tilling, mulching, and nursey stock planting. Please note that seed costs are known to fluctuate seasonally and may vary noticeably from the unit cost used here. The seed mixture includes a substitute for mulch in the inclusion of a wheatgrass hybrid. The Division has historically agreed with and approved the inclusion of this hybrid as a substitute for mulch. Table 10. Revegetation Cost Estimate Pit Exposed P125B S.A. above WSEL [ac] Estimated Failure Initial + Reseeding Rate Area [sq.ft] Seed Cost/Acre Total Job Cost P125B 5.7 25% 7.1 2,134.95 $15,212 CONVEYOR DECOMMISSIONING An elevated conveyor will be used on -site both to transport material from Pit P125B, across the Last Chance Ditch, into P125A, and to transport material from P1 25A to the existing conveyor that runs north -south along the eastern border of the Cogburn site, to an offsite plant location. The Operations team estimated the length of conveyor required based on proposed sequencing, offsite transportation delivery location, and the active pit design. The conveyor, installed in modular 40 -foot sections, is portable and will be decommissioned and transported offsite for use elsewhere following removal of resources from the site. Decommissioning will involve the removal of the conveyor sections and belting, and demolition and on -site disposal of its supporting 2ft x 2ft x 6 ft concrete blocks. The conveyor itself is 3 feet wide. The cost estimate for conveyor decommissioning, summarized in Table 7 below, is based on unit costs taken from the recent DRMS-provided P124 Two Rivers (M2022-013) cost estimate. As consistent with this estimate, an 89.2°/0 location adjustment factor is considered for the decommissioning cost. Table 11. Conveyor Decommissioning Cost Estimate Conveyor Element Section Length [ft] No. of Sections Width [ft] Total Dimension Unit Cost Total Job Cost Elevated Conveyor 125 Concrete Blocks 6 3 3 1,125 [SF] $9.57/SF 10 N/A 60 [LH $6.94/LF 10,766 $416 Total Conveyor Decommissioning Cost: Location Adjustment Factor: Adjusted Conveyor Decommissioning Cost: 11,183 0,892 $9,975 RAPTOR MATERIAISut Raptor Materials, LLC Cogburn Sand, Gravel, and Reservoir Project February 2025 A REGULAR IMPACT (112) CONSTRUCTION PERMIT APPLICATION - COLORADO DIVISION OF RECLAMATION MINING AND SAFETY. OFFICE OF MINED LAND RECLAMATION REgPEc // PAGE 10 EXHIBIT L MOBILIZATION AND DEMOUILIZAJ SON Mobilization and demobilization costs are based upon the Division's estimates, which are pending — but estimated in the summary at the beginning of this Exhibit L at $10,000. DEMOLITION OF STRICTURES No structures are present within the project boundary; therefore, no structure demolition will occur, (Please Note: Since there is no possibility of the applicant in fully reproducing the Division's methods, using similarities from past DBMS calculations is the most viable and accurate means available for the applicant to derive reasonable estimates of per unit costs and should result in estimates very reliable with that of the Division. ` RAPTOR MATERIALSuc Raptor Materials, LLC Cogburn Sand, Gravel, and Reservoir Project February 2025 A REGULAR IMPACT (1121 CONSTRUCTION PERMIT APPLICATION - COLORADO DIVISION OF RECLAMATION MINING AND SAFETY, OFFICE OF MINED LAND RECLAMATION // PAGE 1 EXHIBIT M EXHIBIT M -OTHER PERMITS AND LICENSES SECTION 1 A statement identifying which of the following permits, licenses and approvals the Operator/Applicant holds or will be seeking in order to conduct the proposed mining and reclamation operations: effluent discharge permits, air quality emissions permits, radioactive source material licenses, the State Historic Preservation Office clearance, disposal of dredge and fill material (404) permits, permit to construct a dam, well permits, explosives permits, highway access permits, U.S. Forest Service permits, Bureau of Land Management permits, county zoning and land use permits, and city zoning and land use permits. • Colorado Department of Health Stormwater Discharge Permit Pending. • Colorado Department of Health Emission Permit N/A • Colorado Department of Health Emission Permit N/A Colorado Department of Health Emission Permit N/A • Colorado Department of Health Emission Permit Operations and related activities. • Weld County Special Use Permit Pending. • Colorado Division of Water Resources Well Permit Pending - Concrete Batch Plant. - Portable Equipment - Dry Plant - Wet Plant - Fugitive Dust- Mining Pending. • State Historic Preservation Office clearance N/A. ■ U.S. Department of the Army Corps of Engineers Correspondence of 17 December 2024. No Permit Required per • Planned operations will not utilize or encounter materials, sources, or authorities over related lands and do not require permits for the following: radioactive source materials, construction of a dam, explosives, highway access, U.S. Forest Service, Bureau of Land Management, city zoning or land use. • Note: Any necessary permits for other planned or potential activities, including asphalt batch plants, recycling facilities and operations, etc., will be acquired prior to on -set of such plants, facilities or operations. All future permits will be submitted to the Division to update this list as necessary. Raptor Materials, February 2025 LLC Cogburn Sand, Gravel, and Reservoir Project rY A REGULAR IMPACT (112) CONSTRUCTION PERMIT APPLICATION - COLORADO DIVISION OF RECLAMATION MINING AND SAFETY, OFFICE OF MINED LAND RECLAMATION // PAGE 1 EXHIBIT N EXHIBIT N - SOURCE OF LEGAL RIGHT TO ENTER SECTION 1 Provide documentation of the legal right to enter to conduct mining and reclamation, for Owners of Record described in Rule 1.6.2(1)(e)(i). This may include a copy of a lease, deed, abstract of title, a current tax receipt, or a signed statement by the Landowner and acknowledged by a Notary Public stating that the Operator/Applicant has legal right to enter to conduct mining and reclamation. As landowner(s) to all lands to be permitted for extraction under a Colorado Division of Reclamation Mining and Safety (DRMS), Office of Mined Land Reclamation (OMLR) permit, my signature below testifies that Raptor Materials, LLC., has the legal right to enter and mine with respect to all lands under this permit application (M- 2025-xxx); Cogburn, Gravel and Reservoir Project. Sicned: Garrett Varra, General Manager Raptor Materials, LLC. Signed and dated this j 1 day of State of County of efi I, clot 0 wed TYtoA✓Cyln 2025 The foregoing instrument was acknowledged before me this tvvi.Ar0.,\ 20 2 � by C -S7 aNreke VtifVfo\ of g-ar MCde-Ar‘t CQS LL JESSICA HOOVER NOTARY PUBLIC STATE OF COLORADO NOTARY ID 20044035571 MY COMMISSION EXPIRES OCTOBER 08, 2028 RAPTOR MATERIALSut as Gloack t\A.atGbEAr Nota ublic My Commission expires: day of Raptor Materials, LLC Cogburn Sand, Gravel, and Reservoir Project February 2025 A REGULAR IMPACT (1121 CONSTRUCTION PERMIT APPLICATION - COLORADO DIVISION OF RECLAMATION MINING AND SAFETY, OFFICE OF MINED LAND RECLAMATION // PAGE 1 EXHIBIT 0 EXHIBIT 0 - OWNERS) OF RECORD OF AFFECTED LAND (SURFACE AREAL AND OWNERS) OF SUBSTANCE TO BE MINED SECTION 1 The complete list of all owners can be submitted as a list or on a map in Exhibit C. OWNERCS) OF RECORD OF AFFECTED LAND CSURFACE AREA]: Raptor Materials, LLC 8120 Gage Street Frederick, CO 80516 OWNERCS) OF SUBSTANCE TO BE MINED: Raptor Materials, LLC 8120 Gage Street Frederick, CO 80516 RAPTOR MATERIALSuc Raptor Materials, LLC Cogburn Sand, Gravel, and Reservoir Project February 2025 A REGULAR IMPACT (112) CONSTRUCTION PERMIT APPLICATION - COLORADO DIVISION OF RECLAMATION MINING ANO SAFETY, OFFICE OF MINED LAND RECLAMATION RESpEC // PAGE 1 EXHIBIT P EXHIBIT P MUNICIPALITIES WITHIN TWO MILES SECTION 1 A list of any municipality(s)within two miles of the proposed mining operation and address of the general office of each municipality. Town of Firestone 9950 Park Avenue Firestone, CO 80504 Town of Mead 441 Third Street Mead, CO 80542 Town of Platteville 400 Grand Avenue Platteville, CO 80651 RAPTOR MATERIALSuc Raptor Materials, LLC Cogburn Sand, Gravel, and Reservoir Project February 2025 A REGULAR IMPACT (1121 CONSTRUCTION PERMIT APPLICATION - COLORADO DIVISION OF RECLAMATION MINING AND SAFETY, OFFICE OF MINED LAND RECLAMATION //PAGE 1 EXHIBIT 0 EXHIBIT Q - PROOF OF MAILING OF NOTICES TO BOARD OF COUNTY COMMISSIONERS AND CONSERVATION DISTRICT SECTION 1 Proof that notice of the permit application was sent to the Board of County Commissioners and, if the mining operation is within the boundaries of a Conservation District, to the Board of Supervisors of the local Conservation District, pursuant to Rule 1.6.2(1)(a)(ii). Office of the Board of Weld County Commissioners c/c Weld County Clerk to the Board 1150 O Street Greeley, Colorado 80632 Subject: Colorado Division of Reclamation Mining and Safety (DRMS) Office of Mined Land Reclamation (OMLR Permit application for Raptor Materials, LLC - Cogburn Sand, Gravel and Reservoir Project. NOTICE TO THE BOARD of WELD COUNTY COMMISSIONERS Raptor Materials, LLC (the 'Applicant/Operator') has applied for a Regular (112) reclamation permit from the Colorado Mined Land Reclamation Board (the 'Board') to conduct the extraction of construction materials operations in Weld County. The attached information is being provided to notify you of the location and nature of the proposed operation. The entire application is on file with the Division of Reclamation, Mining, and Safety (the 'Division') and the Weld County Clerk to the Board. The applicant/operator proposes to reclaim the affected land to commercial Developed Water Resources and other Mixed Uses. Pursuant to Section 34-32.5-116(4)(m), C.R.S., the Board may confer with the local Conservation Districts before approving of the post -mining land use. Accordingly, the Board would appreciate your comments on the proposed operation. Please note that, to preserve your right to a hearing before the Board on this application, you must submit written comments on the application within twenty (20) days of the date of last publication of notice pursuant to Section 34-32.5-112(10), C.R.S. If you would like to discuss the proposed post -mining land use, or any other issue regarding this application, please contact the Division of Reclamation, Mining, and Safety, 1313 Sherman Street, Room 215, Denver, Colorado 80203, (303) 866-3567. Your signature below acknowledges receipt of the above referenced permit application form. Date Received: Received By: RECEIVED • MAR. 1 1 2t125 Weld County Clerk to the B�rQWeld County Commissioners vvEL.Q c COMMISSIONERS Raptor Materials, LLC Cogburn Sand, Gravel, and Reservoir Project February 2025 A REGULAR IMPACT (112) CONSTRUCTION PERMIT APPLICATION - COLORADO DIVISION OF RECLAMATION MINING ANO SAFETY, OFFICE OF MINED LAND RECLAMATION // PAGE 1 EXHIBIT R EXHIBIT R - PROOF OF FILING WITH COUNTY CLERK AND RECORDER SECTION 1 An affidavit or receipt indicating the date on which the application was placed with the local County Clerk and Recorder for public review, pursuant to Subparagraph 1.6.2(1)(c). Proof of filing with the County Clerk, to the Board pursuant to Subparagraph 1.6.2(1)(c): Weld County Clerk to the Board 1150 O Street Greeley, Colorado 80632 Subject: Colorado Division of Reclamation Mining and Safety (DRMS), Office of Mined Land Reclamation (OMLR) Permit application for Raptor Materials LLC - Cogburn Sand, Gravel and Reservoir Project. Your signature below acknowledges receipt of the above referenced permit application. The application will be placed for public inspection and review by your Office. The information will be made available to the public until final agency action by the OMLR Board, as defined by C.R.S. 24-4-105(14). Date Received: Received By: RECEIVED MAR 1 1 2025 WELD COUNTY OfgtQw46ttl-C;oU*Mrk to the Board Raptor Materials, LLC Cogburn Sand, Gravel, and Reservoir Project February 2025 A REGULAR IMPACT 11121 CONSTRUCTION PERMIT APPLICATION - COLORADO DIVISION OF RECLAMATION MINING AND SAFETY, OFFICE OF MINED LAND RECLAMATION RESp Ec //PAGE 1 EXHIBIT S EXHIBIT S - PERMANENT MAN-MADE STRUCTURES Where the affected lands are within two hundred (200) feet of any significant, valuable and permanent man- made structure, the applicant shall: SECTION 1 provide a notarized agreement between the applicant and the person(s) having an interest in the structure, that the applicant is to provide compensation for any damage to the structure; or The notarized agreements between the applicant and the person(s) having an interest in the structure, that the applicant is to provide compensation for any damage to the structure are attached as an addendum to this Exhibit S. Notarized agreements obtained are with: - Accord St Vrain Valley Ranch, LLC - Robert Allen Collins - Town of Firestone - LG Everist Inc - Platteville Dairy, LLC - Ready Mixed Concrete Company A complete list of structure owners is shown on Exhibit C-1: Existing Conditions Map and are attached as an addendum to this Exhibit S. SECTION 2 where such an agreement cannot be reached, the applicant shall provide an appropriate engineering evaluation that demonstrates that such structure shall not be damaged by activities occurring at the mining operation; or A slope stability analysis performed by American Water Engineering Services, LLC is included as an addendum to this Exhibit S. SECTION 3 where such structure is a utility, the Applicant may supply a notarized letter, on utility letterhead, from the owner(s) of the utility that the mining and reclamation activities, as proposed, will have "no negative effect" on their utility. The notarized agreements between the applicant and the person(s) having an interest in the utility, that the applicant is to provide compensation for any damage to the utility are attached as an addendum to this Exhibit S. Notarized agreements obtained are with: - Panhandle Eastern Pipeline Company - Resource Gathering System, Inc. - Snyder Oil Corporation - HS Resources, Inc. - Kerr-McGee Gathering, LLC - Kerr-McGee Rocky Mountain Corporation - Weld County Department of Public Works - City of Thornton - Noble Energy - Last Chance Ditch Company RAPTOR MATERIALSue Raptor Materials, LLC Cogburn, Gravel and Reservoir Project February 2025 A REGULAR IMPACT 11121 CONSTRUCTION PERMIT APPLICATION - COLORADO DIVISION OF RECLAMATION MINING AND SAFETY, OFFICE OF MINED LAND RECLAMATION RESpEc Pr, WELD COUNTY girt ONLINE n•1A['PlNti Selected Parcels Report Physical Address Account M6777896 M8943214 M8943222 M8943843 M8943844 M8947215 M8947216 M8957214 M8957215 M8970623 M8978023 M8978024 R0034990 R1022002 Owner COLLINS BOB PLATTEVILLE DAIRY LLC PLATTEVILLE DAIRY LLC PLATTEVILLE DAIRY LLC PLATTEVILLE DAIRY LLC P LATTEVILLE DAIRY LLC PLATTEVILLE DAIRY LLC PLATTEVILLE DAIRY LLC PLATTEVILLE DAIRY LLC P LATTEVILLE DAIRY LLC P LATTEVILLE DAIRY LLC PLATTEVILLE DAIRY LLC RAPTOR MATERIALS LLC READY MIXED CONCRETE COMPANY Report generated: 10/22/2024 5:38:05 PM ell rirT1 13187 COUNTY ROAD 17 WELD 7202 HIGHWAY 66 9 WELD 7204 HIGHWAY 66 10 WELD 7206 HIGHWAY 66 11 WELD 7208 HIGHWAY 66 12 WELD 7210 HIGHWAY 66 13 WELD 7198 HIGHWAY 66 7 WELD 7212 HIGHWAY 66 14 WELD 7214 HIGHWAY 66 15 WELD 7200 HIGHWAY 66 8 WELD 7196 HIGHWAY 66 6 WELD 7194 HIGHWAY 66 5 WELD 8760 HIGHWAY 66 WELD This map is a user generated static output from the Weld County Property Portal mapping site and is for reference only. Data layers that appear on this map may or may not be accurate, current, or otherwise reliable. Page 1 of 2 Account Owner Physical Address R2699604 PLATTEVILLE DAIRY LLC R2699704 PLATTEVILLE DAIRY LLC R2699804 PLATTEVILLE DAIRY LLC R4828386 RAPTOR MATERIALS LLC R4828786 ACORD ST VRAIN VALLEY RANCH LLC R4828886 ACORD ST VRAIN VALLEY RANCH LLC R4829586 RAPTOR MATERIALS LLC R4835386 ACORD ST VRAIN VALLEY RANCH LLC R6778791 COLLINS ROBERT ALLEN R6778791 COLLINS PAULINE F R6778792 RAPTOR MATERIALS LLC R6780765 VARRA PASQUALE R7273098 LG EVERIST INC R7273398 FIRESTONE TOWN OF R8964839 RAPTOR MATERIALS LLC R8982758 RAPTOR MATERIALS LLC 29 Unique Accounts 30 Owners 7388 HIGHWAY 66 WELD 7388 HIGHWAY 66 WELD 13634 COUNTY ROAD 17 WELD 13187 COUNTY ROAD 17 WELD 13187, COUNTY ROAD 17 WELD 13473 COUNTY ROAD 17 WELD This map is a user generated static output from the Weld County Property Portal mapping site and is for reference only Data layers that appear on this map may or may not be accurate, current, or otherwise reliable Page 2 of 2 RAPTOR M AT E RIALSut 8120 Gage Street ® Frederick, CO 80516 Bus: (303) 666-6657 ® Fax: (303) 666-6743 GGREGATE PRODUCTS .........,b .. 201 1 1/2" Washed Rock 203 3/4" Washed Rock 204 3/8 Pea Gravel 301 1 1/2" Road Base 308 Class 5 Road Base _ 303 3/4" Road Base _ 309 Class 6 Road Base 304 Class 1 Structural Fill 401 Concrete Sand _ 403 Squeegee 825 Restocking Fee // PAGE 1 BACKFILL NOTICE EXHIBIT E - BACKFILL NOTICE Inert: fill may be imported, or utilized from existing on -site sources, to meet or exceed planned post extraction land use development potentials over the project area during the life of the operation. The extent and location of fill will be field determined. All inert materials used for backfilling will be consistent with DRMS Rules and Regulations, and those of the Colorado Department of Health and Environment. All beckfill material will be placed with sufficient fines to minimize voids and settling of backfilled areas and slopes. There are no known or expected acid forming or toxic producing materials or refuse at this location, nor will materials known to possess such qualities be knowingly utilized for fill. Any other refuse or reject materials that do not meet the definition of inert and requiring removal and disposal will be placed in closed containers and taken to an appropriate landfill for disposal, unless it is otherwise 'inert,' per Rule 3.1.5(9), of the DRMS Rules and Regulations. All materials, whether extracted on -site or imported, will be handled in such a manner so as to prevent any unauthorized release of pollutants to surface or ground water resources. All fill will be integrated to meet or exceed the reclamation plan and correlated end uses authorized under the approved Colorado Division of Reclamation, Mining and Safety permit. All fill above the anticipated static water level of the resulting basins will be soiled and stabilized according to the approved reclamation plan, or as otherwise allowed according to this application or locally approved land uses. The location and extent of fill utilized over extracted lands will be designated in required DRMS Annual Reports, permit revision, or as part of any request for release of the permitted area, in part or whole. These representations are authorized as is or otherwise modified under the signed original approved DRMS permit, until or unless subsequently modified by an approved DRMS Technical Revision. RAPTOR MATERIALSuc Raptor Materials, LLC Cogburn Sand, Gravel, and Reservoir Project February 2025 A REGULAR IMPACT (1121 CONSTRUCTION PERMIT APPLICATION - COLORADO DIVISION OF RECLAMATION MINING AND SAFETY, OFFICE OF MINED LAND RECLAMATION AMERICAN WATER ENGINEERING SERVICES, LLC MINING AND WATER STORAGE ANALYSIS RAPTOR PIT 125 AWES PROJECT #RM-125-01 OCTOBER 2024 Prepared for: Raptor Materials, LLC 8120 Gage Street Frederick, CO 80516 Prepared by: AWES, LLC 4809 Four Star Ct. Fort Collins, CO 80524 AAWL 4SC9 Four Star Court, Fort Collins, CO SC524 Mining and Water Storage Analysis Raptor Pit 125 Weld County, Colorado Page 1 Introduction The following report presents the results of a hydrogeologic evaluation regarding a proposed gravel quarry operation operated by Raptor Materials, LLC (Raptor) near Platteville, Colorado Raptor identifies the mine as its Pit 125 Operation The evaluation consisted of reviewing available hydrogeologic data and inputting those data into a numerical groundwater flow model The model was then used to estimate the effects of dry mining and lining the pits for water storage on the surrounding groundwater hydrology The site location and mine boundary area are depicted on Figure 1 Background Information The proposed gravel quarry is located in portions of section 29, Township 3 North, Range 67 West of the 6th principal meridian The surrounding land use consists of agricultural, rural residential and natural gas and oil gathering operations The proposed mine occupies an estimated 197 acres The water table at the site is located in unconsolidated alluvial deposits with the depth to water varying between seven and 28 feet below ground surface Soil conditions generally consist of varying thicknesses of top soil underlain by sand and gravel deposits, which in turn are underlain by claystone and sandstone bedrock Over the entire area the average saturated thickness of the sand and gravel deposits (prior to mining) is estimated at about 35 feet It is our understanding that the sand and gravel will be dewatered during aggregate extraction The site location is presented on Figure 1 The mine permit identifies three tracts for sand and gravel extraction which are depicted on Figure 2 This analysis was predictive for the dry mining (dewatenng) and lining of three pits identified as A, B and C and using the pits as surface water storage subsequent to aggregate extraction activities Garrett Varra of Raptor has indicated that mining will progress from south to north and model simulations were ran accordingly The hydraulic conductivity of alluvial deposits can vary greatly, however, for this study a value of 200 feet per day was used for gravely sand The average effective porosity of the local sand and gravel deposits is estimated at 0 27 The natural hydraulic gradient as documented by past water resource investigation reports is on the order of 0 002 feet per foot for the majority of the study area east of the Saint Vrain River Based on USGS studies the depth to groundwater has been measured at less than two feet to greater than 30 feet across the study area Seasonal water table fluctuations between one and three feet are common for this area, however, fluctuations of Mining and Water Storage Analysis Raptor Pit 125 Weld County, Colorado Page 2 greater than ten feet have been documented during drought conditions (Schneider, 1983) Project Assumptions The following are assumptions made in these analyses The aquifer within the model boundary's heterogeneous and anisotropic, o The average saturated thickness of the aquifer within the mine boundary's approximately 35 feet, The average horizontal hydraulic conductivity (K) of the sand and gravel deposits is 200 feet per day and the vertical K value's 20 feet per day, The hydraulic conductivity of unlined ditch beds was assigned a value of 0 4 feet per day and the Saint Vra'n Creek bed was assigned a value of 4 feet per day, The hydraulic conductivity of the lake bed material's 0 01 feet per day, All groundwater solutions are steady state, and The bedrock which underlies the alluvial deposits is an impermeable barrier Model Parameters The effects of dewatenng and pit lining on groundwater flow within the study area were evaluated by using the three dimensional groundwater flow_model Visual ModFlow Pro (VMOD) The general parameters used in the model are presented below Plates 1 depicts model boundary conditions, which are described below The model boundary's 9420 feet (north -south) by 11986 feet (east -west) The model grid's 180 rows by 240 columns or 43200 cells Pits A, B and C were assigned constant head boundaries for dewatenng simulations and lake boundaries for water storage simulations River boundaries were assigned for the Last Chance Ditch and Saint Vra'n Creek General head boundaries were assigned to the model limits (north, south, east and west) A uniform flow field was defined in the model with an unconfined aquifer The natural groundwater flow direction vanes between southeast (west of Saint Vra'n Creek) and northwest (east of Saint Vra'n Creek) within the model boundary Mining and Water Storage Analysis Raptor Pit 125 Weld County, Colorado Page 3 Water levels obtained from published and measured water level data were used to generate water level contours Ground surface and bedrock elevations were obtained from site surveys, dnll hole data and USGS maps The ground surface and bedrock elevations were input into the geo- statistical model Surfer®, which created surface and bedrock contour maps These maps were imported into VMOD to define the ground surface and bedrock elevations within the flow model The river stage elevations (Saint Vrain Creek and ditches) were estimated from survey data and estimated groundwater elevations The model was calibrated by adjusting the general head boundary heads and gradients to simulate available groundwater level data Measured water levels (obtained from Raptor monitoring well data ) were compared to the model predicted elevations The model was adjusted using tnal and error methods of reassigning river boundary conductance and general head elevations until the model predicted water table elevations closely matched measured water levels Once the model was calibrated four model assigned observation wells were placed up and down gradient of tracts A, B and C The calculated head values for the model assigned wells were then used as observed levels so that subsequent model simulations would predict changes to groundwater hydrology compared to the calibrated simulation As mine dewatenng is occurring to the east and south of the model area an elevation of 4755 was assigned for mine dewatenng elevations for all mines Model generated groundwater contours and calibration graph for the calibration run are presented in Attachment A To evaluate the effects of dry mining (dewatenng) and water storage (lining the three cells) on the local groundwater hydrology, constant head boundaries were used to simulate dewatenng and lake boundaries were assigned to simulate water storage To simulate filled ponds, the interior of the reservoirs were assigned a head value of 4795, which is slightly below ground surface An elevation of 4775 was assigned to pit constant head boundanes to simulate the ultimate dewatenng depth Model boundary conditions are depicted in Attachment B Five simulations were ran and included the following 1 Calibration Simulation 2 Cell A Dewater Simulation 3 Cell A Lake — Cell B Dewater Simulation 4 Cell A Lake — Cell B Lake — Cell C Dewater Simulation 5 Cells A, B and C— Lake Simulation Mining and Water Storage Analysis Raptor Pit 125 Weld County, Colorado Page 4 Dewatenng simulations were made using the estimated ultimate mine depth then raising the constant head boundary seven feet above that elevation to account for the water table daylight elevation that occurs during mine dewatenng These same areas were then assigned lake boundaries with the lake elevations being five feet below the surface elevation as defined by surveyed well elevations, topographic maps, and or, Google Earth Figure 2 depicts the extraction extents and model boundaries for all simulations Attachments C through G present model generated contours and calibration graphs for the five model runs summarized on the tables below Table 1— Cell A Dewater ;.Calibration;;Well,; ,, Ca libration;Watef Levelo," ' PfedictedVa`ter Cever 'Y`' EleJation Diffetepce -_ , MW -1 4779 86 4778 57 -1 29 MW -2 4775 47 4774 27 -12 MW -3 4786 17 4785 88 -0 29 MW -4 4777 93 4776 57 -1 36 Mote All values in feet Table 2 — Dewater Cells A and B r;''t c, allbretioriW_ell°� '. i F�' 1 h � �G .7iilf�n �`'i��i ,''�Caliti�atiori Wafer,"Level ; � �<)y '`:Prec1,f;cF,\!, tehlevelik: �p` ��4 ��+��d'�`' + ry 1 4" � Ina',; Eleva,tion Diffierence ; (�,{�>`_ i. cs "3.� l �yl n q MW -1 4779 86 4775 40 -4 46 MW -2 4775 47 4772 34 -3 13 MW -3 4786 17 4785 84 -0 33 MW -4 4777 93 4772 79 -5 14 Mote: All values in feet Table 3 — Cell A Lake Cell B Dewater ''r ; Calibraton' We << t,, — i :, Ca librationaWater Lever , n , F Pred cted,Water Levell`,, f - c e i ii _ ',_ k�;iElevatio tliffarenee _ ': " _ ar ,,,t �,,,. , „ c M W-1 4779 86 4777 61 -2 25 MW -2 4775 47 4774 19 -128 MW -3 4786 17 4786 23 0 06 MW -4 4777 93 4775 81 -2 12 Mote All values in feet Mining and Water Storage Analysis Raptor Pit 125 Weld County, Colorado Page 5 Table 4 — Cell A Lake Cell B Lake Cell C Dewater ,- l',0-allliratibnl Well `,ts ^ '5 - "4,.. 4, Calibrafion�Water, Levels, ` !V �� i'"'`- - _ s^'P,r l� Predicted Water L`evell,; �t ''.. ri-J _ ,,a _ � ,, '':1Elevation " ix,- _ 1 _'_ ..: ,,,, - _ f _ .f� MW -1 4779 86 4777 61 -2 25 MW -2 4775 47 4774 30 -1 17 MW -3 4786 17 _4784 55 -1 62 MW -4 4777 93 4775 00 -2 93 1 Note: All values in feet Table 5 — Cell A Lake Cell B Lake Cell C Lake , bration;Wetit', ° ,',,, ��'..?-.''``ku 7r�..+k;`��w. CaIib aUon:WatertL'ev`el „ n r,:Predicted Water levell" Z8levation Difference MW -1 4779 86 4779 71 -0 15 MW -2 4775 47 4774 03 -144 MW -3 4786 17 4786 22 0 05 MW -4 4777 93 4777 37 -0 56 Note. All values in feet Results A review of Tables 1 through 5, show that the lining of mined pits at their ultimate depth will have temporary effects on the local groundwater hydrology Dewatenng multiple pits at the maximum predicted drawdown (Cells A&B) will likely have the greatest drawdown effects It is anticipated that cell closure of one mine cell (Cell C) will occur dunng the mining and dewatenng of the adjacent pit B, which will mitigate drawdown issues Post lining head levels immediately up and downgradient of the lined pits are within the range of normal seasonal water table elevation changes Predicted water level depressions (shadows) vaned between -015 and -144 feet and predicted mounding was estimated at 0 05 feet for the three lined pits Conclusions The modeling results indicate that shadow -mounding effects of lining post extraction pits will not adversely affect the regional groundwater hydrology From a practical perspective it would be nearly impossible to determine, with any degree of confidence, that water level changes are the result of shadow or mounding verses natural (drought and precipitation) or irrigation influences Joby L Adams, P G Principal/Hydrogeologist Mining and Water Storage Analysis Raptor Pit 125 Weld County, Colorado Page 6 This report was prepared by AWES, LLC Date 10-20-2024 REFERENCES Colton, R B , and Fitch, H R , 1974, Map showing potential sources of gravel and crushed -rock aggregate in the Boulder -Fort Collins -Greeley area, Front Range Urban Corridor, Colorado U S Geol Survey Misc Geol Inv Map I -855-D Schneider, P A, 1983, Shallow groundwater in the Boulder —Fort Collins —Greeley area, Colorado, 1975-77 U S Geological Survey Water Resources Investigation Report 83-4058 .,: F F FIGURES Figure 1 - Site Location Map TN wl- � 0 1 Otafln•a • • C (11,4N 8%0 4795 S 1 MILE O 1000 fEEY 0 503 CC0 METERS Map created with TOPO!® @2002 National Geographic(www_n:tionalgeographic.comJtopo) Approximate Mine Boundary . - Figure 2 - Mine Layout rr MOM IIM. L. �napsas Thi OR SW M E• ns. w r• w •m.rNm r• AL• 701.17 W Y M•1• At: is warani UMW r R1A41AM rIR1 r 41l.ro floor a_ In r`r.I'ino tar s anl J i c� • , G+ gritty. L� St c -A J.- I Crgts•/, T.• .(4.4. M1. Jr^ f� --�I 1 •••••••••• • -mAT •141rr1NM 141.1.10.1✓ A 1 M i M ••• SateAU1. . i+P IF NM 1 4.41.1 ti Y N •STN ICJ MS; O -- :littaw OAD IS oar eon PIP • auk ......roomII.P.RPO. it ads L t_1 ?c,;�1, E SSING KLA1n 1 NEW LooT .."1rrtigionnwalaatos413 Oa WE •••••110.11.1• 00. IP f..,, _ IFII•u .... 1(p•4F ... tar.' y •u1 Jr •a• '• .8# ,rPi lit r..I'IPe'₹��' OM* 0w•.T•••11 141•w•1 A ' •• P DACO. P125 - COGBURN 0 250 500 SCALE IN FEET LEGEND t18UNOARY - APPRO CEO IL FENCE F &SSWNT l PiF —� PIPE RIO t.OF.141Ar L2Ni OVER EAD VI LL TY LMC UNDERGROUND UTl ITY L WP STREET - i1t5TINO CENTEFELNC FLOOOPLMN RIVER ACV OFFSET WATER FLOW Nip SOUTH PLATTE RIVER IAPPRocin IF I DISTANCE BETWEEN FOUND PU.S NA! NESS GORIER FOUND K K]I/OT CORNER AS OF SCRS a CALCULATED POSiT1ON rouND OS MEDAN WH1I 12t NEU KALIL" CAP LS 21-471 Ifl1E'2L'SL• L 2 21 FNOAI GItULAt ED POSITION PROOUC7N0 WELL HEAD APPROMMATE PLUGGED l ADANDONLU WELL HEAD LOCATION ELECTRIC METER ELECTRIC SERVICE POElER POLE WATER ~KE R WATER METER WATER VALVE ELATE POST WELL ATTACHMENT A MODEL CALIBRATION Calculated vs, Observed Head : Steady state ■ Layer#1 95% confidence interval 95% interval m N c0 �s- r��+ �F- Ta) 1 1D to CO N O U CO U"I. MW -3 Observed = 4786.17 Calculated = 4786.17 r l MW -1 Observed = 4779.86 Calculated = 4779.86 MV11-4 Observed = 4777.93 Calculated = 4777.93 MVV-2 Observed = 4775.47 Calculated = 4775.47 Max. Residual: 0.002 (ft) at MW-3/MW-3 Min. Residual: 0 (ft) at MW-2/MW-2 Residual Mean : -0.001 (ft) Abs. Residual Mean : 0.002 (ft) 4780.256 Observed Head (ft) 4785.256 Raptor Pit 125 WMOD Simulations River/Ditch Cal W/Kurtz Dewater AWES, LLC, 970-590-3807 Num. of Data Points : 4 Standard Error of the Estimate : 0.001 (ft) Root Mean Squared : 0.002 (ft) Normalized RI'1PIS : 0.018 ( % ) Correlation Coefficient : 1, Project: Raptor Pit 125 Modeller: l Adams ATTACHMENT ENT IB MODEL BOUNDARY CONDITIONS V," ATTACHMENT C CELL A DEWATERING MODEL CONTOURS AND CALIBRATION GRAPH . f r O h - O • a) ',sass O O O —CO M or- yr • ,qA .A X1,11_^ 0 2000 •4000 Pit A Dewater 4, it . editti of rc\ V r--••"atirit 6000 • c) e Asa1a. 8000 �e • 'oi b.1. • moo 9 1 10000 11986 AWES, LLC 970-590-3807 Date: 10/19/2024 7:29:43 A1r1 Calculated vs. Observed Head : Steady state ■ Layer #1 95°/D confidence interval 95°/0 interval 0 -42 ti 4774.032 r - MW -4 Observed = 4777.93 Calculated = 4776.57 7 - - / / / MW -2 Observed = 4775.47 Calculated = 4774.27 MW -3 Observed = 4786.17 Calculated = 4785.88 / / MW -1 I Observed = 4779.86 Calculated = 4778.57 Max, Residual: -1.355 (ft) at MW-4/MW-4 Min, Residual: -0.295 (ft) at MW-3/MW-3 Residual Mean : -1.035 (ft) Abs. Residual Mean : 1.035 (ft) Raptor Pit 125 VMOD Simulations Cell A Dewater FAWES, LLC - 970-590-3807 4779.032 Observed Head (ft) 4784.032 Num. of Data Points : 4 Standard Error of the Estimate : 0.249 (ft) Root Mean Squared : 1.121 (ft) Normalized RMS : 10.481 ( % ) Correlation Coefficient : 0.999 Project: Raptor Pit 125 Modeller: J Adams ATTACHMENT D CELLS A AND B DEWATERING CONTOURS AND CALIBRATION GRAPHS n (`: NT - 0 0 CD 0 cz a ‘a 0 CL CD v- O C N a N 14795, 20n0 -lobo Pit A Pit. B Dewater ANTES, LLC 970-590-3807 6000 800D tn' 5:4 . h� \i;� - 1 e, Pr., � ,i. i I 11966 Project: Raptor Pit 125 Modeller: J Adarns. Calculated vs, Observed Head a Steady state A Layer #1 95% confidence interval 95`)/0 interval U ra 0 0 C cfl ti c:. Re - 4771.207 MW -3 Observed = 4786.17 Calculated = 4785.84 Mlle -1 Observed = 4T/9.86 Calculated = 4775.40 MW -4 Observed = 4777.93 Calculated = 4772.79 4776.207 4781.207 Observed Head (ft) Max. Residual: -5.138 (ft) at MVV-4/MW-4 Min. Residual: -0.326 (ft) at MW-3/MW-3 Residual Mean : -3.475 (ft) Abs. Residual Mean : 3.475 (ft) Raptor Pit 125 VMOD Simulations Cell A ± Cell B Dewater AWES, LLC i970-590-3807 t- 4786.207 Num. of Data Points : 4 Standard Error of the Estimate : 1.077 (ft) Root Mean Squared : 3.943 (ft) Normalized RMS : 36.853 ( % ) Correlation Coefficient : 0.985 Project: Raptor Pit 125 Modeller: J Adams Calculated vs. Observed Head : Steady state ■ Layer #1 95% confidence interval 96% interval MW -3 n,.s;. Observed = 4786.17 Calculated = 4783.75 MW -4 Observed = 4777.93 Calculated = 4777.18 MW -2 Observed = 4775.47 Calculated = 4772.34 4777.06 4782.06 Observed Head (ft) Max. Residual: -3.83 (ft) at MW-1/MW-1 Min. Residual: -0.746 (ft) at MVti!-4/MW-4 Residual Mean : -2.533 (ft) Abs. Residual Mean : 2.533 (ft) Pit A Pit B Dewater ,AWES, LLC 970-590-3807 i Num. of Data Points : 4 Standard Error of the Estimate : 0.661 (ft) Root Mean Squared : 2.78 (ft) Normalized RMS : 25.984 ( % ) Correlation Coefficient : 0.961! Project: Raptor Pit125 25 Modeller: .1 Adams y ATTACH EWE CELL A LAKE ARID CELL B DEWATERING MODEL CONTOURS AND CALIBRATION GRAPHS rzt� :5 Raptor Pit 125 VMOD Simulations Cell A Lake Cell B Dewater AWES, LLC 970-590-3807 Project: Raptor Pit 125 Modeller: J Adams Calculated vs. Observed Head : Steady state Layer #1 95% confidence interval, 95% interval MW -3 Observed = 4786.17 Calculated = 4786.23 m v M co d v ctS N ct� 03 _U Cr Ws al U co ti 03 yr rn M i ■ MW -1 Observed = 4779.86 Calculated = 4777.61 MW -2 Observed = 4775.47 Calculated = 4774.19 4773.948 4778.948 Observed Head (ft) Max. Residual: -2.25 (ft) at MW-1/MW-1 Min. Residual: 0.062 (ft) at MW-3/MW-3 Residual Mean : -1.398 (ft) Abs. Residual Mean : 1.429 (ft) Raptor Pit 125 VMOD Simulations Cell A Lake Cell B Dewater 4783.948 Num. of Data Points : 4 Standard Error of the Estimate : 0.532 (ft) Root Mean Squared : 1.674 (ft) Normalized RMS : 15.649 ( % ) Correlation Coefficient : 0.99 AWES. LLC 970-590-3807 Project: Raptor Pit 125 Modeller: J Adams v rii co co rn cri ti 4773.948 Calculated vs. Observed Head : Steady state MW -3 Observed = 4786.17 Calculated = 4786.23 • MW -4 Observed = 4777.93 Calculated = 4775.81 4778.948 Observed Head (ft) *Max. Residual: -2.25 (ft) at MW-1/MW-1 Min. Residual: 0.062 (ft) at MVV-3/MW-3 Residual Mean : -1.398 (ft) Abs. Residual Mean : 1.429 (ft) 4783.948 Raptor Pit 125 V11 OD Simulations Cell A Lake Cell B Dewater AWES, LLC 970-590-3807 LI Layer#1 95% confidence interval 95% interval plum. of Data Points : 4 Standard Error of the Estimate : 0.532 (ft) Root Mean Squared :1,674 (ft) Normalized RMS : 15.649 ( % ) Correlation Coefficient : 0.99 Project: Raptor Pit 125 Modeller: J Adams ATTACHMENT MENT E CELL A LAKE CELL B LAKE CELL C DEWATERING MODEL CONTOURS AND CALIBRATION GRAPHS Calculated vs. Observed Head : Steady state a) eo a� as �tei (.)QD a, • O U a' 4774.066 MW -3 Observed = 4786.17 Calculated = 4784.55 / MVV- 1 -r. j .. Observed = 4779.86 Calculated = 4778.29 7 MW -2 Observed = 4775.47 Calculated = 4774.30 4779.066 Observed Head (ft) Max. Residual: -2.93 (ft) at MW-4/MW-4 Min. Residual: -1.167 (ft) at MW-2/MW-2 Residual Mean : -1.822 (ft) Abs. Residual Mean : 1.822 (ft) 4784.066 ■ Layer #1 95% confidence interval 95% interval Num. of Data Points : 4 Standard Error of the Estimate : 0.383 (ft) Root Mean Squared : 1.939 (ft) Normalized RMS : 18.119 ( % ) Correlation Coefficient : 0.987 Raptor Pit 125 VMOD Simulations Cell A Lake Cell B Dewater Cell C Dewater AWES, LLC 970-590-3807 Project: Raptor Pit 12.5 Modeller: J Adams Calculated vs. Observed Head o Steady state Layer #1 95% confidence interval 95% interval MW -3 Observed = 4786.17 Calculated = 4784.55 0 co lzt u) CO 0 ti v 4774.066 7 MW -1 Observed = 4779.86 Calculated = 4778.29 r MW -4 Observed = 4777.93 Calculated = 4775.00 4779.066 Observed Head (ft) Max. Residual: -2.93 (ft) at MW-4/MW-4 Min. Residual: -1.167 (ft) at MW-2/MW-2 Residual Mean : -1.822 (ft) ,Abs. Residual Mean : 1.822 (ft) Raptor Pit 125 VMOD Simulations Cell A Lake Cell B Dewater Cell C Dewater AWES. LIC 970-590-3807 4784.066 Num. of Data Points :4 Standard Error of the Estimate : 0.383 (ft) Root Mean Squared : 1.939 (ft) Normalized RMS : 18.119 ( % ) Correlation Coefficient : 0.9871 Project: Raptor Pit 125 Modeller; J Adams ATTACFIMENT G ALL PITS LAKE MODEL CONTOURS AND CALIBRATION GRAPH Calculated vs. Observed Head : Steady state ■ Layer #1 95°A confidence interval' 95% interval i MW -3 Observed = 4786.17 Calculated = 4786.22 i ti ti ca •v CI) U CO ^' UCD •tr rn ti 4773.791 MW -1 Observed = 4779.86 Calculated = 4779.71 MW -4 Observed = 4777.93 Calculated = 4777.37 i� f - - MW -2 Observed = 4775.47 Calculated = 4774.03 i Max. Residual: -1.435 (ft) at MW-2/MW-2 Min. Residual: 0.051 (ft) at MVV-3/MW-3 Residual Mean : -0.524 (ft) Abs. Residual Mean : 0.549 (ft) Raptor Pit 125 \IMOD Simulations All Pits Lake AWES, LLC; 970-590-3807 4778.791 Observed Head (ft) 4783.791 Num. of Data Points : 4 Standard Error of the Estimate : 0.329 (ft) Root Mean Squared : 0.774 (ft) Normalized RMS : 7.238 ( % ) Correlation Coefficient : 0.998 Project; Raptor Pit 125 Modeller; J Adams COLORA O Department of Public Health & Environment APPLICATION FOR CDPS GENERAL PERMIT COG500000 DISCHARGES FROM SAND AND GRAVEL MINING AND PROCESSING For Agency Use Only: Permit Number Assigned COG50 - Please print or type. The application must be submitted to the Water Quality Control Division at least 60 days prior to the anticipated date of discharge, and must be considered complete by the division before the review and approval process begins. The division will notify the applicant if additional information is needed to complete the application. If more space is required to answer any question, please attach additional sheets to the application form. Applications may be submitted by mail or hand delivered to: Colorado Department of Public Health and Environment Water Quality Control Division, WQCD-P-82 4300 Cherry Creek Drive South Denver, Colorado 80246-1530 Submission - Digitally signed documents may be emailed to cdphe.wqrecordscenter@state.co.us Do not follow up with a mailed -in hard copy. A. PERMIT INFORMATION Reason for Application: Applicant is: e NEW CERT ❑ RENEW CERT EXISTING CERT # PI Property Owner D Contractor/Operator The applicant requests authorization for the following discharge type(s). i r Mine (pit) dewatering: includes any water, such as groundwater, seepage, and Stormwater (precipitation and surface runoff), that is impounded or that collects in the mine pit (surface or underground workings) and is pumped, drained, or otherwise removed from the mine through the efforts of the mine operator. In addition, for construction sand and gravel facilities and industrial sand facilities only, mine dewatering includes wet pit overflow caused solely by direct rainfall and/or groundwater seepage; Process generated wastewater: includes any wastewater used in slurry transport of ruined materials, air emissions control, and processing exclusive to mining. Water used in processing the mined commodity: includes water from washing, sorting, screening, crushing, classifying, etc. Stormwater runoff, comingled with the above listed wastewaters before the discharge point. Stormwater runoff (not comingled with the above listed wastewaters) from facility pollutant sources: includes runoff from stockpiles, disturbed areas, roads, maintenance areas, etc.; asphalt batch plants (SIC code 2951); concrete batch plants (SIC code 3273); or asphalt and concrete recycling activities conducted at the facility. Note: the following discharge types are not eligible for coverage under CDPS General Permit COG500000: • Stormwater discharges associated with construction activity that disturbs one acre or more; • Process water discharges from asphalt batch plants (resulting from the production of asphalt concrete); • Process water discharges from concrete batch plants, including drum and truck wash water (concrete wash out) • Stormwater and process water discharges from placer mining industrial activities (SIC Major Group 10). • Process water discharges from the SIC codes identified in Appendix 1 of this application. Page 1 of 8 - Revision 2/2021 COG500000 Permit Application www.coloradowaterpermits.com B. CONTACT INFORMATION 1. Permittee Information Organization Formal Name: Raptor Materials LLC Permittee Name: the person authorized to sign and certify the permit application. This person receives all permit correspondences and is responsible for ensuring compliance with the permit. Responsible Position (Title): VP of Operations Currently Held By (Person): Robert Haun Telephone No. 720-698-2455 Email address: rhaun@raptormaterialsllc.com Mailing Address: 8120 Gage Street City: Frederick State: CO Zip; 80516 This form must be signed by the permittee to be considered complete. Per Regulation 61, in all cases, it shall be signed as follows: a) In the case of corporations, by a responsible corporate officer. For the purposes of this section, the responsible corporate officer is responsible for the overall operation of the facility from which the discharge described in the application originates. b) In the case of a partnership, by a general partner. c) In the case of a sole proprietorship, by the proprietor. d) In the case of a municipal, state, or other public facility, by either a principal executive officer or ranking elected official. 2. DMR Cognizant Official (i.e. authorized agent) the person or position authorized to sign and certify reports required by permits including Discharge Monitoring Reports [DMR's], Annual Reports, Compliance Schedule submittals, and other information requested by the division. The division will transmit pre-printed DMR's to this person. If more than one, please add additional pages. o Same as 1) Permittee Responsible Position (Title): Environmental Manager Currently Held By (Person): Ben Wilson Telephone No: 832-335-0230 Email address: bwilson@raptormaterialsllc.com Organization: Raptor Materials LLC Mailing Address: 8120 Gage Street City:Frederick State: CO Zip: 80516 Per Regulation 61: All reports required by permits, and other information requested by the Division shall be signed by the permittee or by a duly authorized representative of that person. A person is a duly authorized representative only if: a) The authorization is made in writing by the permittee b) The authorization specifies either an individual or a position having responsibility for the overall operation of the regulated facility or activity such as the position of plant manager, operator of a well or a well field, superintendent, position of equivalent responsibility, or an individual or position having overall responsibility for environmental matters for the company. (A duly authorized representative may thus be either a named individual or any individual occupying a named position) c) Submitted in writing to the Division Page 2 of 8 - Revision 2/2021 COG500000 Permit Application www.coloradowaterpermits.com B. CONTACT INFORMATION (cont.) 3. Site/Local Contact (contact for questions relating to the facility Et discharge authorized by this permit.) ❑ Same as 1) Permittee Responsible Position (Title): Environmental Manager Currently Held By (Person): Ben Wilson Telephone No: 832-335-0230 P Email address:bwilson@raptormaterialsllc.com O rganization: Raptor Materials LLC Mailing Address: 8120 Gage Street City: Frederick State: CO Zip: 80516 4. Operator in Responsible Charge ® Same as 1) Permittee ❑ Same as 3) Site/ Local Contact Responsible Position (Title): Currently Held By (Person): Telephone No: Email address: O rganization: Mailing Address: City: State: Zip: 5. Billing Contact � � Same as 1) Permittee Responsible Position (Title): Accounts Payable Currently Held By (Person): Tawnya Snyder Telephone No: 720-698-2295 Email address: RMLaccountspayable@eaglematerials.com O rganization: Raptor Materials LLC Mailing Address: City: Frederick 8120 Gage Street State: CO Zip: 80516 6. Other Contact Types (check below) Add pages if necessary: Responsible Position (Title): Currently Held By (Person): Telephone No: Email address: O rganization: Mailing Address: City: State: Zip: ❑ Environmental Contact ❑ Facility Inspection Contact ❑ Consultant ❑ Compliance Contact ❑ Property Owner 11 Other Page 3 of 8 - Revision 2/2021 COG500000 Permit Application C. PERMITTED FACILITY INFORMATION Facility or Project Name P125 Street Address (or cross streets) City Platteville County Road 28 and County Road 17 www.coloradowaterpermits.com Colorado, Zip Code 80651 County Weld Type of Facility Ownership o City Government ❑ Corporation = Private Ei State Government n Mixed Ownership Municipal or Water District Facility or Project Latitude/Longitude - List the latitude and longitude of the center point of the facility. Latitude: 40 . 1941509 Longitude: -104 .9076694 (Provide coordinates in decimal degrees to 6 decimal places (e.g., 39.703345 -104.933567° )) Standard Industrial Classification (SIC) Code(s) for this FACILITY (please use dropdown menu to select up to 4 SIC codes, in order of importance) Note: see the SIC codes covered by permit link (general permit COG500000) on the division website for descriptions of SIC codes associated with this permit. 1. 1442 2. 3. 4. D. PROJECT DESCRIPTION - Provide an overview of the industrial activities that are conducted at the facility. The current mining plan includes dry mine gravel extraction from four pits that will encompass approximately 196 acres. Mined material will be transfered to a neighboring pit via conveyors for processing. E. SITE MAPS AND SCHEMATICS - provide as an attachment to the application - no larger than 11x17 inches 1. Location Map - Application must include a location map that shows the location of the project/facility, the boundaries of the area subject to the application, and all receiving water(s). A north arrow must be shown. 2. Legible Site Sketch - showing all surface features (buildings, ponds, diversion ditches, stockpiles, processing areas, batch plants, other pollutant sources, etc.); stream location(s); numbered outtalk; and direction(s) of water flow at the facility indicated by arrows (stormwater and process water). Label outtalk to correspond with the numbers listed Table G.1 of this application. Are the required maps/sketches attached? es El No - Application cannot be processed without required maps F. SITE -SPECIFIC CONDITIONS - Nearby Sources of Potential Groundwater Contamination/Facility pollutant sources Note: The division may require representative analytical data of the effluent (e.g., mine pit water or discharge) as part of the application review process. The division will notify the applicant if any additional information is required. Failure to provide this data may delay permit application processing until such data is submitted to the division. Note: see Appendix B of Application Guidance Document (Construction Dewatering - COG070000) on the division website for resources useful in identifying ground water contamination near the facility. Page 4 of 8 - Revision 2/2021 COG500000 Permit Application www.coloradowaterpermits.com 1. Has the applicant reviewed the surrounding area for possible groundwater contamination, such as plumes from leaking underground storage tanks (LUSTs), hazardous waste sites, or additional sources? Applicants are expected to exercise due diligence in evaluating their sites prior to applying for a discharge permit. a Yes H No f NA (no water leaves the pit, or stormwater-only discharge) 2. Is an open LUST located within 0.5 mile of the site? ❑ Yes a No *If yes, BTEX analytical data for the mine pit water or discharge must be included with the permit application. The division may request analytical data for additional parameters. Failure to include this data may delay permit application processing until such data is submitted to the division. 3. Is a Superfund site or National Priorities List (NPL) site located within 1 mile of the site? Li Yes a No *If yes, analytical data for the mine pit water or discharge, for those parameters associated with the Superfund or NPL facility, must be included with the permit application. Failure to include this data may delay permit application processing until such data is submitted to the division. 4. Is a UMTRA facility located within 1 mile of the site? D Yes a No *If yes, analytical data for the mine pit water or discharge, for those parameters associated with the UMTRA facility, must be included with the permit application. Failure to include this data may delay permit application processing until such data is submitted to the division. 5. Is any other (non -LUST, non-Superfund, non-NPL site) known source of contamination, such as a Voluntary Cleanup (VCUP), Environmental Covenant, open RCRA Corrective Action site, or brownfields site located within 0.5 mile of the site? o Yes a No *If yes, analytical data for the mine pit water or discharge, for those parameters associated with the known source of contamination, must be included with the permit application. Failure to include this data may delay permit application processing until such data is submitted to the division. 6. Is the sand and gravel facility within the footprint of an historic landfill? ri Yes a No If Yes for any of questions 1 6 above, show location of the source(s) of possible groundwater contamination on the maps required in Item E of this application. In the box below, describe the location, extent of contamination, and possible effect on the discharges from this facility. 7. Is concrete truck washout conducted at the facility? ❑ Yes • No If Yes, please provide the following additional information with respect to this discharge: • Location of concrete washout water discharge. Check all that apply. to surface water ❑ to a lined impoundment or excavation to the ground ❑ washout water not discharged - water is reused, or to an unlined impoundment or excavation evaporates • What is the proximity of the discharge to a lake, pond, stream/river, intermittent or ephemeral creek, drainage, irrigation ditch, wetland, etc? • Is the discharge within the DRMS permit boundary? • What is discharge volume and frequency? 8. Does the facility discharge stormwater runoff from a concrete batch plant? (SIC code 3273) Yes No 9. Does the facility discharge stormwater runoff from an asphalt batch plant? (SIC code 2951) es No 10. Does the facility discharge stormwater runoff from recycled concrete? nYes ✓ No 11. Does the facility discharge stormwater runoff from recycled asphalt? Res No Page 5 of 8 - Revision 2/2021 i COG500000 Permit Application G. OUTFALLS www.coloradowaterpermits.com 1. For EACH process water or stormwater-only outfall, provide the information identified in the table. Instructions for filling out this table (superscripts 1 -12) are provided in Attachment 2 of this application. Please copy this page and submit with the application if more than 6 outfalls are required. Table G.1 Outfall and Activity information 1 Discharge information Receiving water information Continuous or Outfall Latitude Activity Descriptions) 2 SIC Process water or Discharge instantaneous flow measu re6 rate flow in Chemicals 9 Distance from pit lmmediate11 to Number Lon itudel g Code3 stormwater4 types Specific method' flow MGD8 surface water10 Ultimately 40.1919 Mine Dewatering P125 S1 - P125A, 1442- 01,02, Process Pumped Continuous 4.42 60 ft Last Chance Ditch 001 965,-104 P125B, - N/A .908532 03 Mag Meter St Vrain Creek 40.19545 Mine Dewatering - P125C 1442- Process Pumped Continuous 50 ft Unnamed Drain 1.93 N/A 002 47,-104.9 01,02, Mag Meter St Vrain Creek 136856 03 003 004 005 A 006 Page 6 of 8 - Revision 2/2021 COG500000 Permit Application www.coloradowaterpermits.com 2. Are any of the receiving waters identified in the Table G.1 above a storm sewer system, ditch, or manmade conveyance? Li Yes nu No Note: if discharge is to a storm sewer system, ditch, or manmade conveyance, approval from the owner of the system must be obtained before discharge. 3. Did the applicant obtain approval from the owner of the storm sewer system, ditch, or manmade conveyance? r� Yes ri No NA - discharge is not to a storm sewer system, ditch, or manmade conveyance. H. CHEMICAL ADDITION/TREATMENT If chemical additives, settling agents, flocculants, or other materials are proposed for use in or to treat wastewater/stormwater prior to discharge, please submit a Chemical Approval Form with this application. 1. Is chemical addition/treatment proposed for this facility? r] Yes P! No 2. Did applicant submit a Chemical Approval Form with this application? Yes e No - chemical addition/treatment not proposed I. OTHER ENVIRONMENTAL PERMITS Does this facility currently hold any environmental permits, or is it subject to regulation, under any of the following programs? Permit Name Yes No Effective Date Permit No. 1. Colorado Division of Reclamation, Mining and Safety 2. Underground Injection Control 3. Clean Water Act (CWA) Section 404 - US COE 4. Resource Conservation and Recovery Act (RCRA) 5. CDPS Stormwater 6. Colorado State Air Pollution Emission ■ 7. Other J. ACTIVITY DURATION When did the activity commence? What is the estimated life of the activity generating the discharge(s) ? 8 2026 years. Page 7 of 8 - Revision 2/2021 COG500000 Permit Application www.coloradowaterpermits.com K. STORMWATER MANAGEMENT PLAN (SWMP) CERTIFICATION - required ONLY for applications requesting stormwater-only outfalls. The Stormwater Management Plan must be completed prior to signing the following certifications! A Stormwater Management Plan (SWMP) shall be prepared prior to applying for stormwater coverage under the general permit, and the following certification signed. "I certify under penalty of law that a complete Stormwater Management Plan has been prepared for my activity. Based on my inquiry of the person or persons who manage the system, or those persons directly responsible for gathering the information, the Stormwater Management Plan is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for falsely certifying the completion of said SWMP, including the possibility of fine and imprisonment for knowing violations." Signature of Legally Responsible Person or Authorized Agent Date Signed Name (printed) Title L. REQUIRED CERTIFICATION SIGNATURE [REG 61.4(1)(H)] "I certify under penalty of law that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system, or those persons directly responsible for gathering the information, the information submitted is to the best of my knowledge and belief, true, accurate and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations." bloat Mum Signature of Legally Responsible Person or Authorized Agent Robert Haun Digttat signed iFt sR w n 0:C t:RCan JaOt prt�t=rrt Oa:n =3S JnRu ad States IL=S :need States R[ V rt ariei Rs t r Materials t)t a I I I ntt gig r a rn i re 1 n ater+atstl Raas]tJe: t]r]1 ? 730sdZ7ent L I obi n Date= 711:1= 11/18/2024 Date Signed VP of Operations Name (printed) Title This form must be signed by the permittee to be considered complete. Per Regulation 61, in all cases, it shall be signed as follows: a) In the case of corporations, by a responsible corporate officer. For the purposes of this section, the responsible corporate officer is responsible for the overall operation of the facility from which the discharge described in the application originates. b) In the case of a partnership, by a general partner. c) In the case of a sole proprietorship, by the proprietor. d) In the case of a municipal, state, or other public facility, by either a principal executive officer or ranking elected official. DO NOT INCLUDE A COPY OF THE STORMWATER MANAGEMENT PLAN with the application DO NOT INCLUDE PAYMENT - AN INVOICE WILL BE SENT AFTER THE CERTIFICATION IS ISSUED. Page 8 of 8 - Revision 2/2021 Attachment 1 Process water discharges not eligible for coverage under CDPS General Permit COG500000 Process water discharges from the facilities listed below are excluded from coverage due to the potential toxicity and wide variety of pollutants, the minimal operations in Colorado, or Federal ELGS that require no discharge of process water from these facilities: no Facility discharge types of that process require water 40 CFR Subpart 436 SIC Code Gypsum air emissions facilities control that do scrubbers not employ wet E 1499 Asphaltic mineral facilities F 1499 Asbestos and wollastonite facilities G 1499 J 1479 Barite wet processes facilities or that flotation do not employ processes Flourspar media separation facilities or that flotation do not employ processes heavy K 1479 L 2899 Saline from brine lake facilities Borax facilities M N 1474 1474 Potash facilities Sodium sulfate facilities 0 1474 Phosphate Rock R 1475 Frasch sulfur facilities S 1479 Bentonite facilities V 1459 Magnesite facilities W 1459 X 1499 Diatomite facilities Jade facilities Y 1499 Novaculite facilities Z 1499 Tripoli facilities AF 1499 Asphalt batch plants 40 CFR 443 2951 Concrete batch plants, including associated truck --- 3273 and drum wash out Appendix Page 1 of 3 - Revision 2/2021 Attachment 2 Instructions for completing Table G.1 in Item G of this application (see superscripts 1 -12). 1. Latitude and longitude Provide the latitude and longitude of each outfall location (NOT the center of the facility) in NAD83 format The discharge location is the point where effluent sampling will occur This location must be at a point after treatment and before the effluent joins or is diluted by any other waste stream, body of water, or substance If the discharge is to a ditch or storm sewer system, include the name of the ultimate receiving waters where the ditch or storm sewer discharges Note facilities that discharge stormwater via sheet flow must identify an outfall at a location along the line of flow that is representative of the facility's sheet flow discharge. This location is where the sheet flow exits the facility, or enters a surface water within the facility, and where samples can be collected, if required 2. Activity Description(s): Bnefly descnbe the activity (or activities) that contnbute water to each outfall Examples include -stormwater runoff from stockpiled gravel, -construction sand pit dewatenng, -stormwater runoff from an asphalt or concrete batch plant, -industnal sand wash water, -stormwater runoff from concrete recycling or asphalt recycling activities, -stormwater runoff from facility haul roads, -other (give a descnption) If more than` one activity contributes waterltio an outfall; list all activities in_the space prownded a 3. SIC code: Identify the SIC code(s) associated with each activity identified above (the SIC codes covered by permit link (general permit COG500000) on the division website for descriptions of SIC codes associated with this permit) If more than one activity contributes water to an outfall, list all SIC codes for the activities in the space provided 4. Process water or stormwater Indicate if the discharge water is process water or stormwater The discharge is considered to be process water if it is descnbed in the bullets below Note that the stormwater provisions in the general permit DO NOT apply to process water Therefore, it is very important that the division understand the contnbution(s) to each discharge from the facility to accurately develop the permit certification for the facility. If the permittee identifies that the discharge for all outfalls is solely stormwater and does not comingle with process water, the division will issue a stormwater-only certification. Process water includes -Mme dewaterng, which includes o any water, including groundwater, seepage, and stormwater (precipitation and surface runoff), that is impounded or that collects in the mine pit (surface or underground workings) and is pumped, drained, or otherwise removed from the mine through the efforts of the mine operator; m additionally, for construction sand and gravel facilities and industrial sand facilities only, wet pit overflow caused solely by direct rainfall and/or groundwater seepage -Process generated wastewater, which includes any wastewater used in slurry transport of mined materials, air emissions control, and processing exclusive to mining, -Any water used in processing the mined commodity such as washing, sorting, screening, crushing, and classifying, -stormwater runoff that becomes commgled with the above listed wastewaters before the discharge point Appendix Page 2 of 3 - Revision 2/2021 Examples of comingled discharges considered to be process water under the renewal permit o Stormwater runoff from mine haul roads that is directed to and discharges from the mine pit The resulting discharge is considered process water, Stormwater runoff from construction activities at the mine facility that is directed to and discharges from the mine pit The resulting discharge is considered process water, and the activity does not require separate construction stormwater permit coverage even if the disturbed area exceeds the one acre threshold, Stormwater runoff from asphalt or concrete batch plants that is directed to and discharges from the mine pit The resulting discharge is considered process water Stormwater runoff from mine areas that commingles with product wash water pnor to discharge 5 Discharge type Indicate the discharge type (for example pumped or passive pit dewatenng, other process water discharge (such as product wash water), detained stormwater (such as detention or sediment ponds), stormwater sheet flow, etc 6 7 It 8. Flow For all process water outfalls, indicate • whether the discharge is measured continuously or instantaneously, ® the specific flow rate method the permtttee uses (v -notch weir, pump capacity, parshall flume, etc ), and • the average flow rate in million gallons per day (MGD) Note the division will apply the flow rate provided in this application supplement as a 30 -average flow limit in the facility certification 9 Chemicals. Identify all chemicals used in industnal activities at the facility that have the potential to be present in the discharge Chemicals in this context include, but are not limited to, chemical used at any point in the treatment process, release agents, etc If the facility does not use chemicals, please indicate `NA' in the table 10. Pit distance to receiving water- As applicable to the facility, provide the distance from the pit to the immediate receiving water If the facility does not have a pit, please indicate `NA' in the table 11_ a 12. Receiving water: Receiving waters include lakes, ponds, nvers and streams (perenmal, intermittent or ephemeral), drainages, irngation ditches, wetlands, etc Identify the immediate and ultimate receiving water of the discharges from all outfalls for the facility (immediate receiving waters are those that the facility discharges directly to, the ultimate receiving waters are those directly downgradient of the immediate waters) Appendix Page 3 of 3 - Revision 2/2021 Figure 1- Site Location Map 01000 fEET 0 500 t000 METERS erszlei Map created with TOPO!® ©2002 National Geographic(www.mtionalgeogxaphic.comitopo) pj Approximate Mine Boundary i 1' 34 NI 31VDS O O • x 1 -h I m _!s h 111)OA# SVO 0313111131VM u3>tuvn N31VM ro ® ¢ O ■ o 311/0130 31011313 0313r1 3101"313 01/30 113N10V1311CCNA 0iNN38i0 T11100103 1011C1I ONn03 0 Uanuoas9JWIM 4 sm.'tlNn01 N33M13031rr1/1t70 N.A E t a S 4 s a A a ;123 A T z r 2 t 9 f m 0 inn unurr oNn00903arm 3`.11 /,11 Y1n rr1/3NNlAO II 3Ni1 IN3113W3 r Nane000 - 93 Id AMERICAN WATER ENGINEERING SERVICES, LLC GROUNDWATER MONITOR! RAPTOR PIT 125 N WELD COUNTY, COLORADO AWES PROJECT X024W;I.2'; OCTOBER 2024 Prepared for: Raptor Materials, LLC. 8120 Gage Street Frederick, CO 80516 Prepared by: AWES, LLC 4809 Four star Ct Fort Collins, X0 80524 iniAMIES 11111C -- 4SC1 Four Star Court, Fort CeHills, CO SC4141 AWES, ]L]LC Table of Contents 1 0 INTRODUCTION 1 1 Objectives 1 2 Background Information 2 0 GROUNDWATER MONITORING 2 1 Monitoring Well Installation 2 2 Groundwater Level Measurements 2 3 Chemical Analyses 2 4 Drawdown/Mounding Modeling 2 5 Contingency Plan and Abatement 3 0 ORGANIZATION AND STAFF ASSIGNMENTS 3 1 Project Personnel 3 2 Subcontractors 4 0 OVERVIEW - QUALITY ASSURANCE/QUALITY CONTROL 1 1 1 1 1 2 2 3 3 3 3 3 4 5 0 REMARKS 4 FIGURES Figure 1- Site Location Map Figure 2— Monitoring Well Location Map TABLE Table 1 —Analytical Parameters APPENDIX Appendix A— Boring Logs Appendix B — Methods and Procedures AWES, LLC GROUNDWATER MONITORING WORK PLAN RAPTOR PIT 125 MINE PROJECT WELD COUNTY, COLORADO 1 0 INTRODUCTION This Groundwater Monitoring Plan (Plan) has been prepared by AWES, LLC on behalf of Raptor Materials, LLC (Raptor) for the proposed Pit 125 mine project located in Weld County, Colorado (Figure 1) The current mining plan includes dry mine gravel extraction from four pits that will encompass approximately 196 acres This plan will be submitted to the Division of Reclamation, Mining and Safety (Division) as part of Raptor's mine permit application 1 1 Objectives The objectives of this Plan are to identify potential liabilities with the extraction of aggregate under semi - saturated conditions Specific objectives for the Raptor project are described below o To determine the aerial extent of drawdown associated with mine dewatenng, o To determine the effects of dry mine aggregate extraction on local hydrology and water quality, • To generate predictive models on possible adverse drawdown in adjacent domestic wells, and a To determine the effects of lined pit reclamation on the local groundwater flow regime 1 2 Background Information The proposed gravel quarry is located in section 29 of Township 3 North, Range 67 West of the 6m Principal Meridian The surrounding land use consists of agricultural, rural residential and oil and gas gathering The proposed mine area occupies an estimated 196 acres The anticipated extraction depth will vary between 23 and 50 feet below grade Information provided by geotechnical investigations, monitoring well water level data and water resource evaluation reports document the local and regional hydrogeology In August 2023, 6 soil borings were dulled from ground surface to bedrock to determine the potential aggregate mass within the proposed mine boundary These borings were completed as one -inch groundwater monitoring wells and the well locations are depicted on Figure 2 The depth to bedrock within the proposed mine pit boundaries vaned between 23 and 50 feet below ground surface In general soil conditions consist of less than one to six feet of top soil and sandy clay underlain by sand and gravel with occasional clay and poorly graded sand lenses The coarse alluvial deposits are underlain by bedrock which consists of siltstone, sandstone and claystone 2 0 GROUNDWATER IVIONITORING 2 1 Monitoring Well Installation As mentioned in August 2023, DrillPro, Inc of Denver, CO drilled six soil borings from ground surface to bedrock using hollow stem auger techniques and completed the borings as one -inch groundwater monitoring wells Boring logs are presented in Appendix A AWES, JL=+.S. y )LPL C 2.2 Groundwater Level Measurements All monitoring wells were surveyed to the nearest 0 01 foot for vertical elevation and to the nearest 0 5 foot for honzontal location Groundwater level measurements in all wells have been measured by an electric water level indicator on a monthly basis since August 2024 Raptor will continue to measure water levels on a monthly basis during dewatermg operations After reclamation groundwater levels will be measured on a quarterly basis until the mine permit has been withdrawn 2 3 Chemical Analyses Table 1 presents field parameters and laboratory analyses for samples obtained from one well selected as a compliance monitoring well Water levels will be measured from all wells on a monthly basis Five samples will be obtained from the compliance well on a quarterly basis will be analyzed for the parameters below to establish a baseline The compliance well will be sampled annually thereafter Table 1— Analytical Parameters Parameter Analytical Method Units Water Quality Standard Frequency , Field Parameters p FI Direct Measurement s u 6 5.9 Annual Specific Conductance Direct Measurement uS/cm N/A Annual Temperature Direct Measurement °F N/A Annual Water Level Direct Measurement Ft N/A Quarterly ' La_ boratory:Parameters r _ Arsenic EPA 200 8 ug/L 10 5 quarters/annual Cadmium EPA 200 8 ug/L 5 5 quarters/annual Chromium EPA 200 8 ug/L 10 5 quarters/annual Copper EPA 200 8 ug/L 200 5 quarters/annual Lead EPA 200 8 ug/L 50 5 quarters/annual Manganese EPA 200 8 ug/L 50 5 quarters/annual Mercury EPA 200 8 ug/L 2 5 quarters/annual Nickel EPA 200 8 ug/L 100 5 quarters/annual Selenium EPA 200 8 ug/L 50 5 quarters/annual Uranium EPA 200 8 ug/L 30 5 quarters/annual Zinc EPA 200 8 ug/L 2000 5 quarters/annual _ Nitrate EPA 300 mg/L 10 5 quarters/annual Sulfate EPA 300 mg/L 250 5 quarters/annual Gross Alpha Particle EPA 900 pCi/L 15 5 quarters/annual Total Dissolved Solids EPA 160 1 mg/L Varied 5 quarters/annual 4 AWES, LLC 2.4 Drawdown/Mounding Modeling Water level data will be used for drawdown and mounding analyses The average of monthly water level data over a one year period will be input into the geostatistical software package Surfer® Vanations in pre - mining water levels will be presented on a two dimensional contour map and will be compared to numerical predictions and will be provided to the Division in an annual report which will be delivered during the first quarter after each sample year All data and methods will be presented in the report 2 5 Contingency Plan and Abatement As mine dewatenng will create a groundwater sink it is highly unlikely that changes in groundwater quality will occur due to mining activities As water levels will be measured on a monthly basis unanticipated groundwater drawdown can be predicted and evaluated for possible injury to off -site well owners The extent of any abatement will be determined by negotiations with affected parties Abatement actions if required may include one or more of the following the use of a recharge pond (or ponds), improvements to the wells, and the supply of alternative sources of water Raptor as described in Exhibit M, "Other Permits and Licenses" to the permit application will obtain a Well Permit from the Colorado Division of Water Resources as the excavation will expose groundwater As part of the well permitting process, Raptor will seek to obtain agreements with well owners who may be impacted by the operation and reclamation of the mine If Raptor receives a complaint from a well owner, the following steps shall be taken 1) Raptor will notify the Division within seven days of the complaint 2) After the Division is notified, or if the complaint is received by the Division and Raptor is notified, Raptor will review the data and available information and submit a report to the Division within 30 days The report will include documentation of discussions with the well owner who made the complaint and a review of available baseline data from the affected well and vicinity to evaluate whether changes were due to seasonal variations, climate, mining, or other factors The report will identify the extent of potential or actual impacts associated with the factors 3) If mining or reclamation activities by Raptor are determined to be a significant contributing factor to the groundwater impacts, the impacts agreed to be attributable to Raptor will be mitigated by Raptor to the satisfaction of the Division 3 0 ORGANIZATION AND STAFF ASSIGNMENTS 3 1 Project Personnel Mr Ben Wilson of Raptor will serve as field coordinator and will be responsible for obtaining water levels and will perform or supervise water quality sampling Mr Garrett Varra of Raptor will provide senior review of field and analytical data and will serve as project coordinator 3 2 Subcontractors Subcontracted services for this project will include an accredited laboratory that will perform analytical services AWES, 11 S, LLC 4 0 OVERVIEW - QUALITY ASSURANCE/QUALITY CONTROL Quality assurance (QA) is a management system for ensunng that all information, data, and decisions resulting from the project are technically sound and properly documented Quality Control (QC) is the functional mechanism through which quality assurance achieves its goals Quality control programs, for example, define the frequency and methods of checks, audits, and reviews necessary to identify problems and dictate corrective action to resolve these problems, thus ensuring data of high quality Thus, a QA/QC program pertains to all data collection, evaluation, and review activities that are part of the project The use of qualified personnel for conducting various portions of the project is of paramount importance to an effective QA/QC program This pertains not only to qualified QA/QC specialists, but also to specialists in other fields, including hydrogeologists, air quality specialists, soil scientists, analytical chemists and other scientific and technical disciplines The project manager should ensure that qualified specialists, pnmanly individuals with the proper education, training, and expenence, including licensed or certified professionals, are directing and performing the various project activities The same general principles apply to selection of contractors and/or outside laboratones Another important aspect of the QA/QC program is the communication between the QA/QC organization and the project manager Regular appraisal by the project manager of the quality aspects related to the ongoing project data-gathenng efforts provides the mechanism whereby the'established objectives may be met QA/QC procedures should provide details relating to the schedule, information to be provided, and the mechanism for reporting to the project manager Reports to the project manager should include Periodic assessment of measurement data accuracy, precision, and completeness, e Results of performance audits, Results of system audits, Significant QA/QC problems and recommended solutions, and Resolutions of previously stated problems 5 0 REMARKS The scope of work is based upon current available information and our understanding of this project As the project develops, changes to the project scope of work may be required If changes in the scope of work are dictated by the needs of the project, these changes will be presented pnor to implementation This Groundwater Monitoring Plan was prepared by AWES, LLC Date Joby L Adams, P G , REM Principal/Hydrogeologist Figure 1- Site Location Map 0 5 I MILE 0000 FEET 0 �, ,� 50� 1••••••••4;000 METERS Map created with TOPO!® ©2002 National Geographic(wwwnationalgeoeraphic.cornitopo) APPENDIX A SOIL BORING LOGS L Project Raptor aliaterlals, LLC Project Location P-125 Project Number 2023-RIVI-P125 AWES, LLC 4809 Four Star Ct Fort Collins, CO 80524 970-590-3807 Log of Bonng MW -1 Sheet 1 of 1 Date(s) 8/2112023 Dnlled Logged By JLA Checked By Dniling HSA Method Dnll Bit 4 25 S¢e/Type Total Depth 38 feet 6gs of Borehole Dnll Rig Type Diedrich Dnllmg DrillPro Services contractor Approximate 4797 Surface Elevation Groundwater Level 13 01 and Date Measured Sampling Cuttings Methods) Hammer Percussion Data Borehole BackflII Location Far NE Well `� 5 > w z � o. p N r -2 CL FT Z E E II) cn ai U C (0 N N ' m c E 3 (TA f— °' J o m c7 MATERIAL DESCRIPTION 0 - � o U d .«- U d t O1 .. T p` m o REMARKS AND OTHER TESTS 4797— _ 0 _ _ oL ; _ Top sod/overburden, dark brown, moist, some - ' sand and gravel z .ii a' - Concrete :-:-• Bentonite chips �. 4792, _ 4787— -_ 4782 — - - - 4777— - - 4772— - _ 4767- - - 4762— 5— _ 10— -_ 15 — - - - 20— - - 25— - _ 30- - - 35— SW GM ` — r , � r r �� r o__gb- p odd' Oh °Y:,,, 0= 7 07 0° 7 h �'�� Sand, poorly sorted, very fine to very coarse - grained, some gravel, brown, moist to wet at 7:+- 13 feet - — - 57_2.• _ _ — _ _ _ Gravel, sand and silt mixture, red -brown, wet - - - - _ u , o ° 0o I O \.. 1" blank riser •Note 2 5' above grade . user • �` 'C �` 1" 0 01 slot PVC : i well screen 1 O ; qO t1, shale : . - Shale, stiff, grey to dark grey _ 4757— 4752— 4747— _ 4742— - 4737— _ 4732 _ - - 40— 45— 50— _ 55— - 60, - 65, - - End of Boring — — — — — — — — - — — -_-.- — - _, — 4727 70 Protect Raptor Materials, LLC AWES, LLIC Key to Log of Boring Protect Location P-125 4809 Four Star Ct Fort Collins, CO 80524 Sheet 1 of 1 Protect Number 2023-RM-1,125 970-590-3807 Elevation (feet) , N L a m O N T a E m N E 1, m d E m a� U C f0 Ur m N C $ O. N m o MATERIAL DESCRIPTION u LzIlar COLUMN DESCRIPTIONS Elevation (feet) Elevation (MSL, feet) p Water Content, % Water content of the soil sample, expressed as Depth (feet) Depth in feet below the ground surface percentage of dry weight of sample Sample Type Type of sod sample collected at the depth interval ® Dry Unit Weight, pcf Dry weight per unit volume of sod sample shown measured in laboratory, in pounds per cubic foot 5 4e Sample Number Sample identification number In Well Log Graphical representation of well installed upon Sampling Resistance, blows/ft Number of blows to advance driven completion of drilling and sampling sampler one foot (or distance shown) beyond seating interval ® REMARKS AND OTHER TESTS Comments and observations using the hammer identified on the bonng log regarding dnlling or sampling made by driller or field personnel 7 e6 Matenal Type Type of matenal encountered Graphic Log Graphic depiction of the subsurface material encountered ® MATERIAL DESCRIPTION Descnption of material encountered May include consistency, moisture, color, and other descriptive text 1 2 3 u Water Content, % Dry Unit Weight, pcf u td REMARKS AND OTHER TESTS FIELD AND LABORATORY TEST ABBREVIATIONS CHEM Chemical tests to assess corrosivity COMP Compaction test CONS One-dimensional consolidation test LL Liquid Limit, percent MATERIAL GRAPHIC SYMBOLS -n �r b' a� qv yv 9 O Bentonite chips Portland Cement Concrete Silty GRAVEL (GM) TYPICAL SAMPLER GRAPHIC SYMBOLS MAuger sampler O Bulk Sample 3 -inch -OD California w/ brass nngs y ff CME Sampler Grab Sample 2 5 -inch -OD Modified California w/ brass liners PI Plasticity Index, percent SA Sieve analysis (percent passing No 200 Sieve) UC Unconfined compressive strength test, Qu, in ksf WA Wash sieve (percent passing No 200 Sieve) Low plasticity PEAT (OL) Shale Well graded SAND (SW) OTHER GRAPHIC SYMBOLS Pitcher Sample -7. Water level (at time of drilling, ATD) Water level (after wading) 2 -inch -OD unlined split spoon (SPT) Minor change in material properties withina stratum Shelby Tube (Thin -walled, — — Infen•edlgradaticnal contact between strata fixed head) —�— Quened contact between strata i i GENERAL NOTES 1 Soil classifications are based on the Unified Sod Classification System Descnptions and stratum lines are mterpretve, and actual lithologic changes may be gradual Field descriptions may have been modified to reflect results of lab tests 2 Descnptions on these logs apply only at the specific bonng locations and at the time the bonngs were advanced They are not warranted to be representative of subsurface conditions at other locations or times Figure B-1 Project: Raptor Materials, LLC Project Location: P-125 Project Number: 2023-RM-P125 AWES, LLC 4809 Four Star Ct. Fort Collins, CO 80524 970-590-3807 Log of Boring MW -2 Sheet 1 of 1i Checked By Date(s) 8/22/2023 Drilled Logged By J LA Drilling HSA Method Drill Bit 4.25 Size/Type Total Depth 25 feet bgs of Borehole Drill Rig Died• rich Type Drilling DrillPro Services Contractor Approximate Surface Elevation Groundwater Level 4, and Date Measured Sampling Cuttings Method(s) Hammer Percussion Data Borehole Bacl fill Location NW of Lagoon Elevation (feet) r r r r r YEN r r r 0000 r r -, r a) O 0 a I — a) cn a) z U cn a� U C ca _(7) C a cn co o cn .n U F- J C13 U L IE 2 O MATERIAL DESCRIPTION Water Conte U d L .E O oL /;;�•,,k Top soil/overburden, dark brown, moist, some -� SW r 10- 1 5 20 30 35 .j� 70 O 000.._ -- • • • • •' sand and gravel. ::::::'' Sand, poorly sorted, very fine to very coarse = grained, some gravel, brown, moist to wet . ▪ • . . . . •••••r 0 . 0 60006e, . . . . . . . . . . . . O 606.._ •.•••• .••0•` . 0•.•• ••••• •••••• ••••• • • • • • . • • • • • • • • • • • • • • • • I • • • • • • •• • • • • 0 1 • • • • • • •. • • • • • I • • • • • • n.. • • • • • • • • • • • • • • • I If • • • • • • ':'•- Gravel, well graded, red -brown, up to 3" gravel, Jr - •••I wet. j • . .. •� ` Shale, very stiff, dark grey at 4 feet. GW Mtn r Shale r ..I r .., .* mus mum End of Boring r •_ a. ✓ • _ r r r r r •0 r r AC rte_ r„,/ •••• 0000. •••• ►••._ ••00 • • • • • 0 • - • • ••••- •••• ••.• •••• •••• •••• �••• ••.• •00•. •••• CD U REMARKS AND OTHER TESTS Concrete rr ° Bentonite chips .0•• •.•• •••. 00.• •••• •••• • • • •I • • • • • • • • •••• •••. • • • •••• .••. .••. •.•, •••• •••• .0•• •••• •...---0000 •••• • • • • • • • • • • . • • • • • • • I • • • • • • •. �r • . • 0 T-0 • • • • • • • —' • • • • • . . . e-- . • . . •••• • • • • • • • • . •••• r� r .dll. •••• • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • ..• •.. rI ft r—:i r .••—•ta. ...• ... 1" blank riser Note - 2.5' above grade riser 1" 0.01 slot PVC well screen Project Raptor Materials, LLC AWES, LL C Key to Log of Boring Project Location P-125 4809 Four Star Ct Fort Collins, CO 80524 Sheet 1 of 1 Project Number 2®23-R1U1-P125 970-590-3807 N t a m N H N o. E m N E J Z m n E m u7 a� U C W tq N m c_ E m 3 O MATERIAL DESCRIPTION Water Content, % U d L m m c REMARKS AND OTHER TESTS u u►uuuu u U 10 t1 1�2 COLUMN DESCRIPTIONS Elevation (feet) Elevation (MSL, feet) Q9 Water Content, % Water content of the sod sample, expressed as Depth (feet) Depth in feet below the ground surface percentage of dry weight of sample Sample Type Type of sod sample collected at the depth interval in Dry Unit Weight, pcf Dry weight per unit volume of sod sample shown measured in laboratory, in pounds per cubic foot ElSample Number Sample identification number in Well Log Graphical representation of well installed upon Sampling Resistance, blows/ft Number of blows to advance driven completion of dulling and sampling sampler one foot (or distance shown) beyond seating interval © REMARKS AND OTHER TESTS Comments and observations using the hammer identified on the boring log regarding drilling or sampling made by duller or field personnel e6 Matenal Type Type of matenal encountered 7 Graphic Log Graphic depiction of the subsurface material encountered ® MATERIAL DESCRIPTION Descnption of material encountered May include consistency, moisture, color, and other descriptive text 1 2 3 FIELD AND LABORATORY TEST ABBREVIATIONS CHEM Chemical tests to assess corrosivity COMP Compaction test CONS One-dimensional consolidation test LL Liquid Limit, percent MATERIAL GRAPHIC SYMBOLS F,S1 o� v0 �eme' i P� Pa a.o.e Bentonite chips Portland Cement Concrete Well graded GRAVEL (GW) TYPICAL SAMPLER GRAPHIC SYMBOLS Auger sampler Bulk Sample 3 -inch -OD California w/ brass rings CME Sampler Grab Sample 2 5 -inch -OD Modified California w/ brass liners PI Plasticity Index, percent SA Sieve analysis (percent passing No 200 Sieve) UC Unconfined compressive strength test, Qu, in ksf WA Wash sieve (percent passing No 200 Steve) Low plasticity PEAT (OL) Shale Well graded SAND (SW) OTHER GRAPHIC SYMBOLS Pitcher Sample ---3Water level (at time of dnlling, ATD) 3 -3 Water level (after waiting) 2 -inch -OD unlined split spoon (SPT) Minor change in material properties withm a stratum Shelby Tube (Thin -walled, — — Inferred/gradational contact between strata fixed head) —a— Quened contact between strata GENERAL NOTES 1 Sod classifications are based on the Unified Soil Classification System Descnptions and stratum lines are interpretive, and actual lithologic changes may be gradual Field descriptions may have been modified to reflect results of lab tests 2 Descnptions on these logs apply only at the specific bonng locations and at the time the bonngs were advanced They are not warranted to be representative of subsurface conditions at other locations or times Figure B4 Protect Raptor Materials, LLC Protect Location P-725 Protect Number 2023-RM-P125 � _ AF VES LLC 4809 Four star ct Fort Collins, CO 80524 970-590-3807 Log of Boring MW -3 Sheet 1 of i - - Date's) 8/22/2023 Drilled Logged By JLA Checked By Drill, Method HSA Dnll Bit 4 25 Srcerrype Total Depth 35 feet bgs of Borehole Drill Rig Diedrich Type Dnlling DrtllPro Services Contractor Approximate Surface Elevation Groundwater Level —6, and Date Measured Sampling Cuttings Method(s) Hammer Percussion Data Borehole Backfill Location Far West Central Well U7 o. O 5- 10- 15 - 20 - 25 - 30, 357 40, 45 - 50 - 55, 60 — 65 — 70 d N a E co N d E Z N d E m U C N Q7 m C � d N g n MATERIAL DESCRIPTION \22L74,14,. Top soil/overburden, dark brown, moist, some 4 sw sM .• 4 ,sand and gravel /_ � Sand, poorly sorted, fine to coarse grained, „,V- with gravel, wet at 6 bgs w� s ow >PGravel, well graded, red -brown, wet, gravel up - mme aemm` o. a_ — av;v— - aP� P°L we shale . ' . ' _ Shale, dark grey, very stiff End of boring Water Content, % 9 it REMARKS AND OTHER TESTS r Concrete Bentonite chips 1" blank riser 1" 0 01 slot PVC well screen Project Raptor Materials, LLC Protect Location P-125 Project Number 2023-RM-P125 AWES, LLC 4809 Four Star Ct Fort Collins, CO 80524 970-590-3807 Key to Log of Boring Sheet 1 of 1 m w O (0 m w u uuuuuu u N L a a� O O d N N n E m Ul E 2 UI E m of U C U U1 N OI C O. E m 3 O Ol O. F - r0 a� m MATERIAL DESCRIPTION Water Content, % COLUMN DESCRIPTIONS Elevation (feet) Elevation (MSL, feet) 0 Depth (feet) Depth in feet below the ground surface Sample Type Type of sod sample collected at the depth interval in shown e4 Sample Number Sample identification number 0 5 Sampling Resistance, blows/ft Number of blows to advance driven sampler one foot (or distance shown) beyond seating interval gi using the hammer identified on the bonng log 6 Matenal Type Type of matenal encountered 7 Graphic Log Graphic depiction of the subsurface material encountered ® MATERIAL DESCRIPTION Description of material encountered May include consistency, moisture, color, and other descriptive text 1 2 3 FIELD AND LABORATORY TEST ABBREVIATIONS CHEM Chemical tests to assess corrosivity COMP Compaction test CONS One-dimensional consolidation test LL Liquid Limit, percent MATERIAL GRAPHIC SYMBOLS 149 9 0 4 Bentonite chips Portland Cement Concrete Well graded GRAVEL (GW) TYPICAL SAMPLER GRAPHIC SYMBOLS i Auger sampler Bulk Sample 3 -inch -OD California w/ brass rings Dry Unit Weight, pcf lig L REMARKS AND OTHER TESTS Water Content, % Water content of the soil sample, expressed as percentage of dry weight of sample Dry Unit Weight, pcf Dry weight per unit volume of sod sample measured in laboratory, in pounds per cubic foot Well Log Graphical representation of well installed upon completion of drilling and sampling REMARKS AND OTHER TESTS Comments and observations regarding drilling or sampling made by driller or field personnel PI Plasticity Index, percent SA Sieve analysis (percent passing No 200 Sieve) UC Unconfined compressive strength test, Qu, in ksf WA Wash sieve (percent passing No 200 Sieve) ;1TTIT i Low plasticity PEAT (OL) Shale Well graded SAND with Silt (SW-SM) OTHER GRAPHIC SYMBOLS ( - Water level (at time of drilling, ATD) CME Sampler Pitcher Sample Water level (after waiting) Grab Sample 2 -inch -OD unlined split Minor change m material properties within a spoon (SPT) stratum 2 5 -Inch -OD Modified X Shelby Tube (Thin -walled, — — Inferred/gradational contact between strata California w/ brass liners fixed head) — ?— Quened contact between strata GENERAL NOTES 1 Sod classifications are based on the Unified Soil Classification System Descnptions and stratum lines are interpretive, and actual lithologic changes may be gradual Field descriptions may have been modified to reflect results of lab tests 2 Descnptions on these logs apply only at the specific bonng locations and at the time the bonngs were advanced They are not warranted to be representative of subsurface conditions at other locations or times Figure B-1 Project Raptor Materials, LLC Project Location P-125 Protect Number 2023-RM-P125 AWES, LLC 4809 Four Star Ct Fort Collins, CO 80524 970-590-3807 Log of Boring MW -4 Sheet of I 1 Date's) 8/22/2023 Drilled Logged By JLA Checked By Drilling Method HSA Dnll Bit 4 25 Sizeffype Total Depth 25 feet bgs of Borehole Drill Rig Diedrich Type 'I. DrillPro Services Contractor Approximate Surface Elevation Groundwater Level bgs and Date Measured 8' Sampling Cuttin Methods s Method(s) 9 Hammer Percussion Data Borehole Backfill Location Far Northwest Well n U7 w7 w aai 0 N d U n E m N E Z N o. E m U C [0 U7 UJ m C � a� 63 N F- J U � a � (9 MATERIAL DESCRIPTION Water Content, % U Q L G a 0 o_ 5— 10.1 15 - 20- 25- 30 - 35- 40, 45, - 55 - 60 - 65, 70 oL Top soil/overburden, dark brown, moist, some a sw r_\sand and gravel /_ Sand, poorly sorted, fine to coarse grained, _ with gravel, wet at 6' bgs . 11_ r cw ':a'� Gravel, well graded, red -brown, wet vev- shale • _ Shale, dark grey, very stiff End of boring m J REMARKS AND OTHER TESTS { Concrete ��- Bentonite chips _ 1" blank riser 1" ll 1 slot PVC & s � s�< well screen a ©. Project Raptor Matenals, LLC Project Location P-125 Project Number 2023-RM-P125 AWES, LLLC 4809 Four Star Ct Fort Collins, CO 80524 970-590-3807 Key to Log of Boring Sheet I of I N .vi O m w u W LeJ W u UJ L n m O N T i- Gl n E m N E Z N n E c U C lq N d C � d U7 � o cA a N d F - f0 N m MATERIAL DESCRIPTION Water Content, % U d L C REMARKS AND OTHER TESTS COLUMN DESCRIPTIONS Elevation (feet) Elevation (MSL, feet) 90 Water Content, % Water content of the soil sample, expressed as Depth (feet) Depth in feet below the ground surface percentage of dry weight of sample Sample Type Type of sod sample collected at the depth interval ® Dry Unit Weight, pcf Dry weight per unit volume of soil sample shown measured in laboratory, in pounds per cubic foot e4 Sample Number Sample identification number in Well Log Graphical representation of well installed upon 5 Sampling Resistance, blows/ft Number of blows to advance dnven completion of drilling and sampling sampler one foot (or distance shown) beyond seating interval ® REMARKS AND OTHER TESTS Comments and observations using the hammer identified on the boring log regarding dnlhng or sampling made by driller or field personnel 6eMatenal Type Type of material encountered 7 Graphic Log Graphic depiction of the subsurface material encountered ® MATERIAL DESCRIPTION Description of material encountered May include consistency, moisture, color, and other descnptive text 1 2 3 FIELD AND LABORATORY TEST ABBREVIATIONS CHEM Chemical tests to assess corrosivity COMP Compacbon test CONS One-dimensional consolidation test LL Liquid Limit, percent MATERIAL GRAPHIC SYMBOLS �av 9a� c v v M1 v C o'o v•m.� e° v� v( Bentonite chips Portland Cement Concrete Well graded GRAVEL (GW) TYPICAL SAMPLER GRAPHIC SYMBOLS s Auger sampler Bulk Sample 3 -inch -OD California w/ brass nngs CME Sampler PI Plasticity Index, percent SA Sieve analysis (percent passing No 200 Sieve) UC Unconfined compressive strength test, Qu, in ksf WA Wash sieve (percent passing No 200 Sieve) �f i Low plasticity PEAT (OL) Shale Well graded SAND (SW) OTHER GRAPHIC SYMBOLS - -3 Water level (at time of dnlhng, ATD) Pitcher Sample --`— Water level (after waiting) Grab Sample 2 -Inch -OD unlined split Minor change in material properties within a spoon (SPT) y stratum I2 5 -Inch -OD Modified X Shelby Tube (Thin -walled, — — Inferred/gradational contact between strata California w/ brass liners fixed head) — z— Quened contact between strata GENERAL NOTES 1 Sod classifications are based on the Unified Sod Classification System Descnptions and stratum lines are interpretive, and actual hthologic changes may be gradual Field descriptions may have been modified to reflect results of lab tests 2 Descnptions on these logs apply only at the specific bonng locations and at the time the bonngs were advanced They are not warranted to be representative of subsurface conditions at other locations or times Figure B-1 Project Raptor Materials, LLC Project Location P-125 Project Number 2023-RM-P125 AWES, LL,C 4809 Four Star Ct Fort Collins, CO 80524 970-590-3807 Log of Boring MW -5 Sheet 1 of 1 Date(s) 8/23/2023 Dniled Logged By JLA Checked By Dnlhng HSA Method Drill Bit 4 25 Size/Type Total Depth feet bgs of Borehole 43 Dell Rig Diedrich Type '''g DrillPro Services Contractor Approximate 4800 Surface Elevation Groundwater Level 13' bgs and Date Measured Samphng Cuttings Method(s) Hammer Percussion Data Borehole Backfill Location Far Southwest Well iii g c5 o > w w �- a o O 9,- I— Z m m E E (2 cn gS (� N U N i. m E l'." in —�° F- m °' 2 J O MATERIAL DESCRIPTION c - C w o - m L- d O) N .-. 2 p 07 O J — m �' REMARKS AND OTHER TESTS — ° _ _ 5— o� ''',:, tit - Top sod - /overburden, dark brown, moist, some _ sand and gravel — 7--• i •� 7, --Concrete �r— Bentornte chips ..!• .. — — _ _ 10— _ ___ 1s— _ _ sw • .- «r- • ..-_- E Sand, poorly sorted, fine to coarse grained, with gravel, wet at 6' bgs — C � — . •• . . ' _ • . _ _ -:. �Pl 1" blank nser — — — 20, _ -,:71:=Y: _ 25— _ _ 30— _ - _ 39— _ _ Gw vin e'• ' a Pte, '�® e` s:, P Pa .`.. 'e °av > o' 0` r ' .00..- 'PiP- � �` fP®or ',m @- >eoe Gravel, well graded, red -brown, wet — — _ — .l f o . m, ..:1,,g -g: : P l'r- P 1'C =a .f= • 0 . .f �=.,e, e .a. u- : v-�. O. 0'� a1�1=�1" �s ? 1 .;ec v l°f '7.7,'...:,•'.-- o .--7 . Pt s_Pl C .... a. P�Dl�f a Cea. Pl'fCP c, i X0O. P1 tPl f 0 01 slot PVC well screen — 40—, shale . — Shale, dark grey, very stiff=; — — i + — — i — . _ 45— 50— 55— 60— _ _ 65— - - End of boring — — — — - — — _ — - _ — — _ ), — 70 1 Pro)ect Raptor Materials, L -L -C Pro)ect Location P-125 1ProJect Number 2023-RM-P125 AWES, LL C 4809 Four Star Ct Fort Collins, CO 80524 970-590-3807 Key to Log of Boring Sheet 1 of 11 , c O w a� a. a� O N a f - N a E m N E 7 Z N a E m m U C y N o_ m d tq E 3 (A To' `m m MATERIAL DESCRIPTION a a v o: a N a 0 J `o N a N N O i W 3 5 U u u121uuuu COLUMN DESCRIPTIONS Water Content, % Dry Unit Weight, pcf m J REMARKS AND OTHER TESTS u u ILI LA Elevation (feet) Elevation (MSL, feet) 9Q Water Content, % Water content of the sod sample, expressed as Depth (feet) Depth in feet below the ground surface percentage of dry weight of sample Sample Type Type of sod sample collected at the depth interval ©0 Dry Unit Weight, pcf Dry weight per unit volume of sod sample shown measured in laboratory, in pounds per cubic foot EiSample Number Sample identification number In Well Log Graphical representation of well installed upon Sampling Resistance, blows/ft Number of blows to advance dnven completion of drilling and sampling sampler one foot (or distance shown) beyond seating interval © REMARKS AND OTHER TESTS Comments and observations using the hammer identified on the bonng log regarding drilling or sampling made by dnller or field personnel El Matenal Type Type of matenal encountered 7 Graphic Log Graphic depiction of the subsurface matenal encountered SQ MATERIAL DESCRIPTION Descnpbon of matenal encountered May include consistency, moisture, color, and other descriptive text 1 2 3 FIELD AND LABORATORY TEST ABBREVIATIONS CHEM Chemical tests to assess corrosnrity COMP Compaction test CONS One-dimensional consolidation test LL Liquid Limit, percent MATERIAL GRAPHIC SYMBOLS Bentonite chips Portland Cement Concrete ffff ° y9 oP� Well graded GRAVEL (GW) TYPICAL SAMPLER GRAPHIC SYMBOLS Auger sampler Bulk Sample 3 -inch -OD California w/ brass nngs 'i T CME Sampler Grab Sample 2 5 -inch -OD Modified California w/ brass liners PI Plasticity Index, percent SA Sieve analysis (percent passing No 200 Sieve) UC Unconfined compressive strength test, Qu, in ksf WA Wash sieve (percent passing No 200 Sieve) i Low plasticity PEAT (OL) Shale Well graded SAND (SW) OTHER GRAPHIC SYIVIBOLS Pitcher Sample - Water level (at time of drilling, ATD) Water level (after wading) 2 -inch -OD unlined split spoon (SPT) Minor change to matenal properties within a 1 stratum Shelby Tube (Thin -walled, — — Inferred/gradational contact between strata fixed head) — 2— Quened contact between strata GENERAL NOTES 1 Sod classifications are based on the Unified Soil Classification System Descnptions and stratum lines are interpretive, and actual Idhologic changes may be gradual Field descriptions may have been modified to reflect results of lab tests 2 Descnptions on these logs apply only at the specific bonng locations and at the time the bonngs were advanced They are not warranted to be representative of subsurface conditions at other locations or times Figure B-1 Project Raptor Materials, LLC Project Location P-125 Project Number 2023-RM-P125 AWES, LPL C 4809 Four Star Ct Fort Collins, CO 80524 970-590-3807 Log of Boring MW -6 Sheet 1 of 71 Date's) 8/23/2023 Drilled Logged By JLA Checked By Dolling HSA Method Dnll Bit 4 25 Srzeffype Total Depth 53 feet bgs of Borehole Drill Rig Diedrich Type Dolling DriIIPro Services Contractor Approximate 4800 Surface Elevation Groundwater Level 16 b s and Date Measured g Sampling Cuttings Method(s) Hammer Percussion Data Borehole Backrill Location Far Southeast Well n N .C a m 0 N O. F- eJ d E is MATERIAL DESCRIPTION Water Content, % Dry Unit V/eIght, pcf 5- 10, 15, 20 - 25 - 30-, 35, 407 45 - 507 55 — 60 — 65, oL - Top soil/overburden, dark brown, moist, some - _ sand and gravel SW ,-Sand, poorly sorted, fine to coarse grained, with gravel, wet at 6' bgs r' r Gravel, well graded, gravel sand mixture, red -brown, wet Shale - Shale, dark grey, very stiff -End of boring m J d REMARKS AND OTHER TESTS Concrete Bentonite chips 1" blank riser 1" 0 01 slot PVC well screen 70 Protect Raptor Materials, LLC Protect Location P-125 AWES, L► LC 4809 Four Star Ct Fort Collins, CO 80524 Key to Log of Boring Sheet 1 of i Protect Number 2023-RM-P125 970-590-3807 N d L n ai 0 N d QI n E m O .O E 7 Z N fl. E m a� U C O N N N O) C d E m 3 0 .n MATERIAL DESCRIPTION Water Content, % Dry Unit Weight, pcf REMARKS AND OTHER TESTS a a v rn a N N a 0 J C `o N a i N N O N N W g U u uuuuuu u U 11 COLUMN DESCRIPTIONS Elevation (feet) Elevation (MSL, feet) 9❑ Water Content, % Water content of the soil sample, expressed as Depth (feet) Depth in feet below the ground surface percentage of dry weight of sample Sample Type Type of sod sample collected at the depth interval Q0 Dry Unit Weight, pcf Dry weight per unit volume of sod sample shown measured in laboratory, in pounds per cubic foot ElSample Number Sample identification number in Well Log Graphical representation of well installed upon Sampling Resistance, blows/ft Number of blows to advance driven completion of drilling and sampling sampler one foot (or distance shown) beyond seating interval © REMARKS AND OTHER TESTS Comments and observations using the hammer identified on the bonng log regarding drilling or sampling made by dnller or field personnel e6 Matenal Type Type of material encountered 7 Graphic Log Graphic depiction of the subsurface matenal encountered ® MATERIAL DESCRIPTION Descnption of matenal encountered May include consistency, moisture, color, and other descnptive text 1 2 3 FIELD AND LABORATORY TEST ABBREVIATIONS CHEM Chemical tests to assess corrosivity COMP Compaction test CONS One-dimensional consolidation test LL Liquid Limit, percent MATERIAL GRAPHIC SYMBOLS ;iii; z a1 ,vv v Ji 9 y9� I PAP Bentonite chips Portland Cement Concrete Well graded GRAVEL (GW) TYPICAL SAMPLER GRAPHIC SYMBOLS Auger sampler Bulk Sample 3 -inch -OD California w/ brass nngs CME Sampler Water level (after waiting) Grab Sample 2 -inch -OD unlined split Minor change m material properties within a spoon (SPT) stratum PI Plasticity Index, percent SA Sieve analysis (percent passing No 200 Sieve) UC Unconfined compressive strength test, Qu, in ksf WA Wash sieve (percent passing No 200 Sieve) 11111111111 Low plasticity PEAT (OL) Shale Well graded SAND (SW) OTHER GRAPHIC SYMBOLS Pitcher Sample Water level (at time of drilling, ATD) 2 5 -Inch -OD Modified X Shelby Tube (Thin -walled, — — Inferred/gradational contact between strata California w/ brass liners fixed head) —?— Quened contact between strata GENERAL NOTES 1 Soil classifications are based on the Unified Sod Classification System Descnptions and stratum lines are interpretive, and actual lithologic changes may be gradual Field descriptions may have been modified to reflect results of lab tests 2 Descnptions on these logs apply only at the specific bonng locations and at the time the bonngs were advanced They are not warranted to be representative of subsurface conditions at other locations or times Figure B-1 APPENDIX B METHODS ARID PROCEDURES AWES, LLC METHODS AND PROCEDURES Groundwater Sampling All monitoring wells where groundwater is encountered will be sampled according to the protocols listed below All pertinent information will be recorded on a sampling information form or field book Field Protocol Step 1- Measure water level Step 2 - A dedicated polyethylene bailer will be used to develop each well Three well volumes will be evacuated from each well prior to sampling Step 3 - Collect water samples Water samples will be collected using a polyethylene bailer Step 4 - Store samples in a cooler on ice for transport to the laboratory Follow all documentation and chain - of -custody procedures Step 5 - Clean equipment Water level measurement equipment will be cleaned with ethanol followed by a deiontzed water rinse Upon completion of soil or groundwater sampling, a chain of custody log will be initiated A copy of the chain of custody will be returned to the project manager Chemical Analysis All analytical parameters are presented on Table 1 Groundwater Elevation Measurements The following outlines our standard groundwater quality sampling methodology Before purging any of the soil test borings or monitoring wells, water level measurements must be taken Measuring Point Establish the measunng point for the well The measuring point is marked on the north side of the top of the monitoring well riser The top of the nser Is normally a one or two Inch casing inside a locked protective casing The riser will generally be PVC pipe The measuring point should be described on the groundwater sample collection record or field book Access After unlocking or opening a monitoring well, the first task will be to obtain a water level measurement Water level measurements will be made using an electronic water level Indicator Depth to water and total depth of the well will be measured for calculation of purge volume AWES, ]LLC Measurement To obtain a water level measurement, lower a decontaminated electronic water level probe into the monitoring well Care must be taken to assure that the electronic probe hangs freely in the monitoring well and is not adhering to the well casing The electronic probe will be lowered into the well until the audible sound of the unit is detected and the light on the electronic sounder illuminates At this time, the precise measurement should be determined by repeatedly raising and lowenng the probe to obtain an exact measurement The water level measurement is then entered on the groundwater sampling collection record sheet or field book to the nearest 0 01 feet Decontamination The electronic probe shall be decontaminated immediately after use by wiping with isopropyl alcohol -soaked paper towels If applicable always proceed in order from the suspected cleanest well or soil test bonng to the suspected most contaminated one Purge Volume Computation All monitonng wells will be purged pnor to sample collection Depending upon the rate of recovery, three to five volumes of groundwater present in a well or bore hole shall be withdrawn prior to sample collection If a well or bore hole bails dry, the well or bore hole should be allowed to recharge and a sample taken as soon as there is sufficient volume for the intended analysis The volume of water present in each well or bore hole shall be computed using the two measurable variables, length of water column in soil bonng or monitonng well and diameter Purging and Sample Collection Procedures Ba 1�ng o Obtain a laboratory decontaminated disposable bailer and a spool of nylon rope or equivalent bailer cord Tie a bowline knot or equivalent through the bailer loop Test the knot for adequacy by creating tension between the line and the bailer Tie again if needed New rope will be used for every sample or purge New clean latex gloves will be used when touching the rope or bailer Spread a clean plastic sheet near the base of the well The plastic sheet should be of sufficient size to prevent bailer or bailer rope from contacting the ground surface Place the bailer inside the well to verify that an adequate annulus is present between the bailer and the well casing to allow free movement of the bailer Lower the bailer carefully into the well casing to remove the sample from the top of the water column, taking care not to agitate the water in the well Pour the bailed groundwater into a bucket Once the bucket is full, transfer the water to a barrel and contain on -site If no regulated substances are suspected the evacuated water can be poured on the ground if local regulations allow AWES, ]LLC o Raise the bailer by grasping a section of cord, using each hand alternately This bailer lift method will assure that the bailer cord will not come into contact with the ground or other potentially contaminated surfaces Sampling Instructions for obtaining samples for parameters are reviewed with the laboratory coordinator to insure that proper preservation and filtering requirements are met Appropriate sample containers will be obtained from the contract laboratory After samples are collected, they will be put on ice in coolers (4°C) Care will be taken to prevent breakage during transportation or shipment Samples collected by bailing will be poured directly into sample containers from bailers The sample should be poured slowly to minimize air entrapment into the sample bottle During collection, bailers will not be allowed to contact the sample containers o Upon completion of sampling a chain -of -custody log will be initiated Chain -of -custody records will include the following information project name and number, shipped by, shipped sampling point, location, field ID number, date, time, sample type, number of containers, analysis required and sampler's signature The samples and chain -of -custody will be delivered to the laboratory Upon arrival at the laboratory the samples will be checked in by the appropnate laboratory personnel Laboratory identification numbers will be noted on the chain -of -custody record Upon completion of the laboratory analysis, the completed chain -of -custody record will be returned to the project manager Field Cleaning Procedures For all equipment to be reused in the field, the following cleaning procedures must be followed Disassemble the equipment to the extent practical Wash the equipment with distilled water and laboratory -grade detergent Rinse with distilled water until all detergent is removed Rinse the equipment with isopropyl or methanol, making sure all surfaces, inside and out, are rinsed o Triple rinse the equipment with distilled water Laboratory Selection The project manager should consider the following factors when selecting a laboratory Capabilities (facilities, personnel, instrumentation), including Participation in interiaboratory studies (e g , EPA or other Federal or State agency sponsored analytical programs), Certifications (e g , Federal or State), References (e g other clients), Experience Turnaround time, and Technical input (e g , recommendations on analytical procedures) AWES, ILILC The project manager is encouraged to gather pertinent laboratory -selection information prior to extensively defining analytical requirements under the project A request may be made to a laboratory to provide a qualifications package that should address the points listed above Once the project manager has reviewed the vanous laboratory qualifications, further specific discussions with the laboratory or laboratories should take place In addition, more than one laboratory should be considered For large-scale investigations, selection of one laboratory as a primary candidate and one or two laboratories as fall -back candidates should be considered The quality of the laboratory service provided is dependent on various factors The project manager should be able to control the quality of the information (e g, samples) provided to the laboratory It is extremely important that the project manager communicate to the laboratory all the requirements relevant to the project This includes the number of samples and their matrices, sampling schedule, parameters and constituents of interest, required analytical methodologies, detection limits, holding times, deliverables, level of QA/QC, and required turnaround of analytical results Field and Laboratory Quality Control General Quality control checks are performed to ensure that the data collected is representative and valid data Quality control checks are the mechanisms whereby the components of QA objectives ore monitored Examples of items to be considered are as follows 1 Field Activities Use of standardized checklists and field notebooks, Verification of checklist information by an independent person, Strict adherence to chain -of -custody procedures, Calibration of field devices, Collection of replicate samples, and a Submission of field blanks, where appropriate 2 Analytical Activities o Method blanks, o Laboratory control samples Calibration check samples, replicate samples, Matrix -spiked samples, "Blind" quality control samplers, Control charts, Surrogate samples, Zero and span gases, and Reagent quality control checks Water Well Details Permit Number Latitude Longitude Owner Permit Status Construction Date Permit Category Use(s) 333156- 40 189838 -104 909036 RAPTOR MATERIALS, LLC (VARRA, GARRETT) Well Constructed 8/23/2023 Monitoring/Observation Monitoring/Sampling 315477- 40 191780 -104 904158 READY MIXED CONCRETE COMPANY Well Constructed 6/11/2019 Monitoring/Observation Monitoring/Sampling 333154- 40 194554 -104 913611 RAPTOR MATERIALS, LLC (VARRA, GARRETT) Well Constructed 8/22/2023 Mondonng/Observation Monitoring/Sampling 333152- 40 196637 -104 904997 RAPTOR MATERIALS, LLC (VARRA, GARRETT) Well Constructed 8/21/2023 Monitoring/Observation Monitoring/Sampling 333153- 40 198785 -104 909435 RAPTOR MATERIALS, LLC (VARRA, GARRETT) Well Constructed 8/22/2023 Monitoring/Observation Monitoring/Sampling 333292- 40 196742 -104 911761 OCCIDENTAL PETROLEUM (RIEMER, JOSEPH) Well Constructed 8/1/2023 Monitoring/Observation Monitoring/Sampling 333293- 40 198796 -104 911773 OCCIDENTAL PETROLEUM (RIEMER JOSEPH) Well Constructed 8/1/2023 Monitoring/Observation Mondonng/Sampling 333294- 40 196760 -104 911691 ENSOLUM (THOMAS, DANIEL) Well Constructed 8/1/2023 Monitoring/Observation Monitoring/Sampling 333295- 40 198725 -104 911832 OCCIDENTAL PETROLEUM (RIEMER, JOSEPH) Well Constructed 8/1/2023 Monitoring/Observation Monitoring/Sampling 333296- 40 197806 -104 911750 OCCIDENTAL PETROLEUM (RIEMER, JOSEPH) Well Constructed 8/1/2023 Monitoring/Observation Monitoring/Sampling 333155- 40 199402 -104 914580 RAPTOR MATERIALS, LLC (VARRA, GARRETT) Well Constructed 8/22/2023 Monitoring/Observation Monitoring/Sampling 25867 -F -R 40 201879 -104 914413 COLORADO DAIRY FARMS Well Constructed 3/14/1992 General Purpose Stock 299543- 40 189339 -104 903950 VARRA COMPANIES INC (VARRA,GARRETT) Well Constructed 8/6/2013 Monitoring/Observation Monitoring/Sampling 4124-F 40 193402 -104 904335 VARRA COMPANIES INC (VARRA,GARRETT) Well Constructed 5/20/1963 General Purpose Irrigation 45973- 40 189896 -104 902281 RALPH NIX PRODUCE INC Well Constructed 5/10/1909 Residential Domestic 239442-A 40 189725 -104 902234 READY MIXED CONCRETE COMPANY LLC (MARVEL JR, J C) Well Constructed 3/12/2002 Residential Domestic Top of pipe (ft ) Ground (ft.) Measured Bottom Depth of Well (ft) Elevation of Well Bottom (ft ) Date Pit 125 Piezometers MW -2 MW -3 MW -4 MW -5 MW- MW - 7025 7029 7027 7019 7021 7023 4789 63 4794 84 4789 29 4798 32 4800 91 4799 85 4787 04 4792 13 4786 52 4800 43 4798 32 4797 04 4762 63 4768 06 4763 38 4754 04 4746 99 4765 85 27 00 26 78 25 91 44 28 53 92 34 00 7025 7029 Elevation of Water (ft.) 7027 7019 7021 7023 3/29/2024 4781 18 4784 46 4780 65 4770 54 4773 39 4782 97 5/30/2024 4782 42 4786 26 4780 65 4775 70 4777 03 4784 83 9/27/2024 4782 57 no access 4780 35 4778 95 4781 70 4785 71 10/25/2024 4782 01 4786 53 4783 51 4775 84 4778 56 4784 71 11/20/2024 4781 52 4786 12 4780 38 4774 49 4776 70 4782 85 AMERICAN WATER ENGINEERING SERVICES, LLC SLOPE STABILITY ANALYSES OMLR 112 PERMIT APPLICATION RAPTOR MATERIAL PIT 125 AWES PROJECT # 2024-RM-13125 October 2024 Problem: Raptor Pit 125 - FS Alin- Bishop = 1.312 70 - - 65 - - 60 -- 55 - Soils Cohesion Friction Bedrock Sand w Grvl Sand Water Table Critical Surface J Angle 500.0 22.0 0.0 38.2 . 0.0 35.4 50 45 40 35 — - 30 25 20 15 10-- 0 -5 -10 -15 -20 L . l L. L. t. J J J J J -25 - - c. r J I 1 1 J 1 1 1 J 1 1 1 J 1 • J • • • J • 1 1 J 1 1 1 J 1 1 1 1 1 1 1 1 1 1 1 • 1 • 1 • • • • • • • 1 1 1 • 1 1 l 1 1 1 L • 1 1 l 1 I 1 L 1 1 1 L 1 1 • 1 • L. L L L L 1 • 1 • • 1 • 1 • • • • 1 J _ -1 L. L_ J_ J_ 1- L- 1 • 1 1 1 1 1 1 1 1 1 • 1 1 1 1 1 • • 1 / / • J J 1 L 1 1 1 1 • 1 / 1 1 1 • • J J 1 L L • 1 1 • 1 1 1 • 1 1 / • J J 1 L L 1 1 t 1 1 / 1 1 1 1 • 1 J J 1 L L 1 1 1 • 1 1 1 1 • 1 1 4 _ J L J J J • 1 1 J 1 1 J 1 / 1 1 J 1 t 1 J 1 • 1 1 1 1 1 1 1 1 1 • • 1 • L • 1 • L 1 • 1 L 1 - -- L ----- • • ---L ----- • • • s • -10 0 10 20 30 • i • • • • 40 50 SO 70 (Scale in Feet) 1 80 90 100 110 • 1 • 120 130 Prepared for: Raptor Materials, LLC 8120 Gage Street Frederick, CO 80516 Prepared by: AWES, L.L.C. 4809 Four Star Ct. Fort Collins, CO 80524 ASAWES 48U1 Four Star Court, Fort Collins, CO 80524 Introduction The following report presents the results of a slope stability analysis for a proposed open cut gravel extraction operations at the Raptor Materials, LLC (Raptor) Pit 125 operations located near Platteville, Colorado This analysis was performed at the request of Raptor This report is being submitted in partial fulfillment of an OMLR 112 Mine Permit Application Background Information The proposed gravel quarry is located in portions of section 29, Township 3 North, Range 67 West of the 6ti' principal meridian The surrounding land use consists of agricultural, rural residential and natural gas and oil gathering operations The proposed mine occupies an estimated 197 acres The water table at the site is located in unconsolidated alluvial deposits with the depth to water varying between seven and 28 feet below ground surface Soil conditions generally consist of varying thicknesses of top soil underlain by sand and gravel deposits, which in turn are underlain by claystone and sandstone bedrock Over the entire area the average saturated thickness of the sand and gravel deposits (prior to mining) is estimated at about 35 feet It is our understanding that the sand and gravel will be dewatered during aggregate extraction The site location is presented on Figure 1 Previous Investigations Raptor conducted a sand and gravel study in August 2023 The study consisted of drilling six soil borings from ground surface to bedrock to determine the potential aggregate mass within the proposed mine boundary Selected sand and gravel samples were obtained for direct shear testing The depth to bedrock over the site varied between 23 and 50 feet below ground surface The geotechnicai laboratory report is presented as Attachment A Soil boring logs are presented in Attachment B Overview of Stability Analyses Soil strength testing for the sand and gravel deposits was performed as part of the Raptor study Density testing was not performed on field samples and unit weights used by the Division of Reclamation and Mining Safety were used for bedrock and overburden clay Unit weight values reported by Engineering Analytics, Inc , of Fort Collins, CO for were used for the sand and gravel deposits Slope Stability Analysis Raptor Pit 125 Weld County, Colorado Page 2 Table 1 —Soil Strength Properties Material Wet Unit Weight (Ibs/cu ft ) ` Saturated Unit , Weight (Ibs/cu ft ) Cohesive Intercept (PSF) Friction Angle Overburden Clay* 114 126 50-150 28 Sand, occasional gravel 132** 138** 0 35 4*** Gravelly Sand 132** 138** 0 38 2 Bedrock* 124 134 500 22 Note * Unit weight values reported by DRMS ** Remolded unit weight values reported by Engineering Analytics, Inc *** Average of the direct shear testing results The assumptions used in the bank stability analysis include the following o The static depth to groundwater at the distance to no pumping influence is 6 feet below ground surface and the water table will intersect the pit bank just above the mine floor (seepage face) during steady state dewatenng, O The pit depth will vary between 23 and 50 feet below grade, • The termination zone for the 23 foot simulation was placed 15 feet back from the crest of the mine wall as the model predicted sheet failure (raveling) for any termination zone beginning down the mine slope, o During extraction activities the pit bank slope will vary between 1 25H 1V and 3 H 1V The software package PC-STABL was used to evaluate slope stability Simulations using Spencer, and Modified Bishop methods were ran to determine the most conservative safety factor The soil strength properties used in the analysis are presented on computer generated data sheets which are presented in Attachment B Stability analyses were ran for the following scenarios a 23 foot mine depth with a bank cut of 125H 1V, and a 50 foot mine depth with a bank cut of 3H 1V for the bottom 20 feet and 125H 1V for the remaining slope It was assumed that a safety factor of 13 or greater will meet regulatory approval Discussion As the stratigraphy, other than depth to bedrock, did not vary greatly across the study area two model runs were made to simulate the conditions encountered during drilling A review of the model results indicate that a safety factor of slightly greater than 13 is Slope Stability Analysis Raptor Pit 125 Weld County, Colorado Page 3 achieved for a uniform slope of 125H 1V at a bank height of 23 feet — this safety factor is contingent on the lower sand and gravel deposits having a fnction angle of 38 degrees This scenano is depicted on Plate 1 in Attachment C Model results indicate that using a lower bank slope (20 feet) of 3H 1V will result in safety factors of greater than 13 at a bank height of 50 feet This scenario is depicted on Plate 2 Using the different wet unit weights reported in Table 1, resulted in safety factor differences of less than 2 percent If any significant modifications to proposed pit wall slopes occur this analysis may not be representative of site conditions and additional simulations are recommended Comments The discussions and recommendations in this report represent our professional opinions Our conclusions, opinions and recommendations are based from information available at this time and we do not guarantee that undiscovered conditions will not become evident in the future AWES' report was prepared in accordance with currently accepted engineering practices at this time and location and no other warranties, representations or certifications are implied or intended This report was prepared by AWES, LLC IJ Joby L Adams, P G Pri nci pal/Hyd rogeologist Date October 11, 2024 REFERENCES Engineering Analytics, Inc, 2023 Geotechnical Laboratory Test Report, Raptor Materials, October 2023 FIGURES , Figure 1 - Site Location Map t- 0 a� • a Ditch JJr. t 4810 p • � IVIN 18%° TN 4813 4830-_ Z . .�\ #4'878 5 SORE 0 r---I0(jO FEET 0 }� ---L S0ILF14Q0 h4ETEtiS Map created with TOPO!® ©2002 Natinnal Geographic(www.nationalgeog-aphic.comltopo) 4782 ji iamin �79� ' 1 BM 796 Approximate Mine Boundary . 4 -9, -?p ATTACHMENT A Geotechnicai Study Resuks Geotechnical Labor tory Test Report Raptor Materials Prepared for: AWES, LLC Fort Collins, CO 80525 Engineering Analytics, Inc. 1600 Specht Point Road, Suite 209 Fort Collins, Colorado 80525 (970) 488-3111 Fax (970) 488-3112 Project No. 111077 October 12, 2023 1.0 Summary Laboratory testing was performed on soil samples at the request of AWES, LLC of Fort Collins, Colorado All samples were obtained by AWES, LLC The samples tested and tests conducted were assigned by personnel from AWES, LLC All of the testing was performed by Engmeenng Analytics under the direct supervision of a licensed Professional Engineer in the State of Colorado All of the tests were performed in general accordance with the Amencan Society of Testing and Materials (ASTM) procedures unless noted otherwise Where ASTM procedures were not applicable, the testing was performed in general accordance with acceptable industry standards and the deviations were noted in the report No major problems were encountered with the laboratory testing Presented in this report are all of the test results and relevant graphs 2e® Direct Shear The Direct shear tests were performed -in general accordance with ASTM D3080 The test is ,performed by deforming a specimen at a controlled strain rate on or near a single shear plane determined by the configuration of the apparatus Generally, three or more specimens are tested, each under a different normal load, to determine the effects upon shear resistance and displacement, and strength properties such as Mohr strength _ envelopes - ._ . ' 4 9000 Results _ C, psf 1405 (1), deg 38 2 Tan() 0 79 I 6000 a � ui m 3000// ' Z 0 0 3000 6000 9000 12000 15000 18000 ' Normal Stress, psf { 9000 Sample No 1 2 3 Water Content, % 2 2 2 2 2 2 7500 Dry Density, 114 2 114 2 114 2 \ \ pcf ; Saturation, % 13 0 13 0 13 0 3 - Void Ratio 0 4490 0 4490 0 4490 6000 o ; Diameter, 4 00 4 00 400 K in 1 17 1 17 1 17 4500 ' '— 2 Height, in Water Content, % 13 1 13 1 13 1 8 2 Dry Density, 121 0 121 6 122 4 pcf Saturation, % 94 2 96 0 98 5 3000 X' Void Ratio 0 3675 0 3607 0 3516 1 Diameter, 4 00 4 00 4 00 1500 in Height, 1 10 1 09 1 09 in Normal Stress, 1000 4000 8000 psf Fail Stress, psf 2024 4840 7566 0 0 5 10 15 20 Strain, % Strain, % 6 8 9 0 5 5 Ult Stress, psf Strain, % Strain rate, in /min 0 003 0 003 0 003 Sample Type Remolded Description Gravelly SAND Assumed Specific Gravity= 2 650 Remarks Figure Client- AWES, LLC Project Raptoi Materials Lab Testmg Source of Sample P-125 Sample Number MW -2 Proj No. 111077 Date Sampled DIRECTSHEAR TEST REPORT i ENGINEERING ANALYTICS, INC. Tested By. EH Checked By EH 6000 Results _ C, psf 64 4), deg 32 6 Tan(C) 0 64 4000 g 2 ` v_ 2000 77777 / i 0 0 2000 4000 6000 8000 10000 12000 Normal Stress, psf 6000 Sample No 1 2 3 WaterDensity, Content, % 3 0 3 0 5000 s 11930° 1139°0 1190°19 0 Drypcf m 20 5 20 5 20 5 Saturation, % Void Ratio 0 3903 0 3903 0 3903 4000 n Diameter, 4 00 4.00 4 00 r m Height, 142 142 142 8 3000 in Water Content, % 118 118 118 id 2 Dry Density, 122 4 122 9 123 5 pcf % 89 1 90 5 92 3 cp 2000 il:), Saturation, Void Ratio 0 3515 0 3462 0 3393 Q Diameter, 4 00 4.00 4 00 1000 in 1 38 1.38 1 37 1 Height, in Normal Stress, 1000 4000 8000 psf Fail Stress, psf 747 2540 5207 0 0 5 10 15 20 Strain, % Strain, % 93 102 114 Ult Stress, psf Strain, % Strain rate, in /min 0 003 0 003 0 003 Sample Type- Remolded Description Gravelly SAND Assumed Specific Gravity= 2 650 Remarks Figure Client AWES, LLC Project Raptor Materials Lab Testmg Source of Sample P-125 Sample Number MW -6 Proj No. 111077 Date Sampled. DIRECT SHEAR TEST REPORT ENGINEERING ANAL YTICS, INC, Tested By. EH Checked By EH ATTACHMENT B B®R0NG LOGS C,WES1202,RM P1251Borin Project Raptor Materials, L.L.C Project Location P-925 Project Number 2023-RM-P925 A ES, LLC 4809 Four Star Ct Fort Collins, CO 80524 970-590-3807 Log of Bonng MW -1 Sheet I of 1 J Date's) 8/21/2023 Dnlled Logged By JLA Checked By Drilling HSA Method Dnll Bit 4 25 Size/Type Total Depth 38 feet bgs of Borehole Dr'''. Diednch Type 'll.DrillPro Services Contractor Approximate 4797 Surface Elevation Groundwater Level 13 01 and Date Measured Sampling Cuttings Method(s) Hammer Percussion Data Borehole Backlit' Location Far NE Well 4, v `° Eli ^ --5n o N � d ] T F Z in m U N N m n O a I--� (0 a? . O J L E 6 MATERIAL DESCRIPTION e C w C U U d m C p rn J REMARKS AND OTHER TESTS 4797, 0 - - oL ; _ Top soil/overburden, dark brown, moist, some - - sand and gravel = t1� o •ii �� •�3• ''.- Concrete i Bentonite chips 4792— - 4787— 4792— - - 5— - 10— ts— - - 3w _ .- Sand, poorly sorted, very fine to very coarse _ grained, some gravel, brown, moist to wet at = 13 feet — ,- - `- - r 1" blank nser Note 2 5' above grade riser 47777 - 4772— - 4767 — - - - 4762— zo— - 25— - — 30o'1"6:- - - - 35— cM o, o- Gravel, sand and silt mixture, red -brown, wet _ °c - - o`(11'-`- - �(,�C.�, OTq — 7_ o',Cir - 7 _ o� ,1, n o Qo 0 ' _ 1" 0 01 slot PVC well screen ` ; _ = shale . - Shale, stiff, grey to dark grey - - 4757— - 4752- 4747- 4742- 4737- 4732- - - 40— - 45- 50- 55- 60- 65- - - End of Boring - — — - - - - - - - - - - - - - I 4727-70 Project Raptor Materials, LLC Project Location P-125 Project Number 2023-RM-P125 AWLS, L LC 4809 Four Star Ct Fort Collins, CO 80524 970-590-3807 Key to Log of Boring Sheet 1 of 1 N C O m w u uuuuuu u N L o. a� N T F- N n E m N 7 z N E m U C N d c2 D1 C t E 3 m O iA .n UI O. (0 `m is MATERIAL DESCRIPTION Water Content, % d L LSI C REMARKS AND OTHER TESTS a N a v a N N a h O J 0 m O. `o m N a i N N O N W 3 3 U t U 11 COLUMN DESCRIPTIONS Elevation (feet) Elevation (MSL, feet) Q9 Water Content, % Water content of the soil sample, expressed as Depth (feet) Depth in feet below the ground surface percentage of dry weight of sample Sample Type Type of soil sample collected at the depth interval Q0 Dry Unit Weight, pcf Dry weight per unit volume of sod sample shown measured in laboratory, in pounds per cubic foot BSample Number Sample identification number Q1 Well Log Graphical representation of well installed upon 5 Sampling Resistance, blows/ft Number of blows to advance driven completion of drilling and sampling sampler one foot (or distance shown) beyond seating interval ® REMARKS AND OTHER TESTS Comments and observations using the hammer identified on the boring log regarding dulling or sampling made by dnller or field personnel 6eMatenal Type Type of material encountered 7 Graphic Log Graphic depiction of the subsurface material encountered ® MATERIAL DESCRIPTION Description of material encountered May include consistency, moisture, color, and other descriptive text 2 3 FIELD AND LABORATORY TEST ABBREVIATIONS CHEM Chemical tests to assess corrosivtty COMP Compaction test CONS One-dimensional consolidation test LL Liquid Limit, percent MATERIAL GRAPHIC SYMBOLS ba4a 'y9 O 64 N� Bentonite chips Portland Cement Concrete Silty GRAVEL (GM) TYPICAL SAMPLER GRAPHIC SYMBOLS Auger sampler Bulk Sample �e 3 -inch -OD California wl brass nngs CME Sampler Grab Sample 2 5 -inch -OD Modified California w/ brass liners PI Plasticity Index, percent SA Sieve analysis (percent passing No 200 Sieve) UC Unconfined compressive strength test, Qu, in ksf WA Wash sieve (percent passing No 200 Sieve) 111111111111 Low plasticity PEAT (OL) Shale Well graded SAND (SW) OTHER GRAPHIC SYMBOLS Pitcher Sample 2 -inch -OD unlined split spoon (SPT) Shelby Tube (Thin -walled, — — Inferred/gradational contact between strata fixed head) —7— Quened contact between strata --Y. Water level (at time of dulling, ATD) —3 Water level (after waiting) Minor change in matenal properties within a stratum GENERAL NOTES 1 Sod classifications are based on the Unified Sod Classification System Descnptions and stratum lines are interpretive, and actual lithologic changes may be gradual Field descnptions may have been modified to reflect results of lab tests 2 Descriptions on these logs apply only at the specific boring locations and at the time the bonngs were advanced They are not warranted to be representative of subsurface conditions at other locations or times Figure B-1 Protect Raptor Materials, LLC AWES, LLC Log of Boring MW -2 Protect Location P-125 4809 Four Star Ct Fort Collins, CO 80524 Sheet 1 of 1 Protect Number 2023-RM-P'125 970-590-3807 \AWES\2022-RM P1251Borina L Date's) 8/22/2023 Drilled Logged By JLA Checked By Dolling Method HSA Bit 4 25 Drill B Sizefrype Total Depth 25 feet bgs of Borehole Drill Rig Diedrich Type Drilling DnIIPro Services Contractor Approximate Surface Elevation Groundwater Level 4, and Date Measured Sampling Cuttings Method's) Hammer Percussion Data Borehole Bad.II Location NW of Lagoon i a v c O > ui w a O 1- d j > Z F N U C @ d a� C$ 3 con �° f0 a? O U c' MATERIAL DESCRIPTION o N 0 U U p_ _ L ? __ C p` J N REMARKS AND OTHER TESTS -o - _ - " — - — - - - 5- - io— - 15— - - - OL sw Top soil/overburden, dark brown, moist, some •a - ��and and gravel �_ Sand, poorly sorted, very fine to very coarse ,_ .- grained, some gravel, brown, moist to wet - ^ at 4 feet = -- � - , _ L. — `- - , t - :r 7,- '-^Bentonite .� •�� -1" — _ = _ . _— Concrete chips blank user Note - 2 5' above grade riser _- - 20 - _ G'N a ee- Gravel, well graded, red -brown, up to 3" gravel, - oP_ _ .®.@ wet ... 7ee�-D� a .= oa. 1" 0 01 slot PVC well screen _ Shale — Shale, very stiff, dark grey — _ — - - - - — — — 25— _ 30- 35- 40- 45- 50 — 55— so= 65— _ _ End of Boring _ - - - - - - - - — — — — — — — — - - — 70 'Project Raptor Materials, LLC Project Location P-925 Project Number 2023-RM-P925 AWES, Ll6C 4809 Four Star Ct Fort Collins, CO 80524 970-590-3807 Key to Log of Boring Sheet 1 of 9 U7 C O m w N w t a ai O N d f - N a E m N E 7 Z N o. E m U C f0 y N QI O_ E m 0 .o N d `m m MATERIAL DESCRIPTION Water Content, % Dry Unit Weight, pcf REMARKS AND OTHER TESTS u uuuuuu COLUMN DESCRIPTIONS Elevation (feet) Elevation (MSL, feet) 90 Water Content, % Water content of the soil sample, expressed as Depth (feet) Depth in feet below the ground surface percentage of dry weight of sample Sample Type Type of soil sample collected at the depth interval ® Dry Unit Weight, pcf Dry weight per unit volume of sod sample shown measured in laboratory, in pounds per cubic foot El Sample Number Sample identification number in Well Log Graphical representation of well installed upon 5 Sampling Resistance, blows/ft Number of blows to advance dnven completion of drilling and sampling sampler one foot (or distance shown) beyond seating interval © REMARKS AND OTHER TESTS Comments and observations using the hammer identified on the bonng log regarding dnlhng or sampling made by dnller or field personnel B6 Matenal Type Type of matenal encountered 7 Graphic Log Graphic depiction of the subsurface material encountered ® MATERIAL DESCRIPTION Description of material encountered May include consistency, moisture, color, and other descriptive text 1 2 3 FIELD AND LABORATORY TEST ABBREVIATIONS CHEM Chemical tests to assess corrosivity COMP Compaction test CONS One-dimensional consolidation test LL Liquid Limit, percent MATERIAL GRAPHIC SYMBOLS •yiV v .q a a o ec a'm?� Bentonite chips Portland Cement Concrete Well graded GRAVEL (GW) TYPICAL SAMPLER GRAPHIC SYMBOLS Auger sampler Bulk Sample 3 -inch -OD California w/ brass nngs CME Sampler Grab Sample 2 5 -inch -OD Modified California w/ brass liners a PI Plasticity Index, percent SA Sieve analysis (percent passing No 200 Sieve) UC Unconfined compressive strength test, Qu, in ksf WA Wash sieve (percent passing No 200 Sieve) Low plasticity PEAT (OL) Shale Well graded SAND (SW) OTHER GRAPHIC SYMBOLS --F Water level (at time of dnlling, AM) Pitcher Sample ---3 Water level (after waiting) 2 -inch -OD unlined split Minor change in matenal properties within a spoon (SPT) 1 stratum Shelby Tube (Thin -walled, — — Inferred/gradational contact between strata fixed head) —?— Queried contact between strata GENERAL NOTES 1 Sod classifications are based on the Unified Soil Classification System Descriptions and stratum lines are interpretive, and actual lithologic changes may be gradual Field descriptions may have been modified to reflect results of lab tests 2 Descnptions on these logs apply only at the specific bonng locations and at the time the bonngs were advanced They are not warranted to be representative of subsurface conditions at other locations or times Figure B-1 WWES\202,RM P125\Bonn Protect Raptor Materials, t_e_C Protect Location P-125 Protect Number 2023-RM-P125 AWES, LLC 4809 Four Star Ct Fort Collins, CO 80524 970-590-3807 Log of Boring MW -3 Sheet 1 of 1 Date(s) 8/22/2023 Dnlled Logged By JLA Checked By Dnllmg HSA Method Dnil &t 4 25 Sizefrype Total Depth 35 feet bgs of Borehole Drill Rig Diedrich Type Dnlling ❑rillPro Services ConVactor Approximate Surface Elevation Groundwater Level _6, and Date Measured Sampling Cuttings Method(s) Hammer Percussion Data Borehole Backfill Location Far West Central Well A c a .-. � v A. � U' 7 T h Z m a� _ a n U @ N N !Y e E 4= Ti.N -�° a H- m _ aj O J U a MATERIAL DESCRIPTION \ o_ G C O U a' '-' U �' m -, ' o m J _ 2i REMARKS AND OTHER TESTS _ _ _ - - — - _ _ T. - - - ° _ _ 5- - - io— - _ 15— 20 _ - 25— - - oL swsM Dw ' ' , ;- Top sod/overburden, dark brown, moist, some 4 ; ‘sand and gravel /_ t ; , .Sand, poorly sorted, fine to coarse grained, - 4, with gravel, wet at 6' bgs ?_ • « - •• . - q:/:_ .. - . 4Y, - ♦S .( _ 'm'o-- Gravel, well graded, red -brown, wet, gravel up 'por _ to 5" - 'v� P — — oa o'- - '.o. - .m!.. - ; ' 'm' 'o T. ...o: si . vo .B .a, .o ... ,-^, Concrete ,-- Bentonite chips '`" 1" blank riser `,.' ° es . 1" 0 01 slot PVC well screen - 30, - Shale _ Shale, dark grey, very stiff - - - _ :� :' a1, .m 7 _ 35— 40- 45-- 50- 55, 60- 65- - - End of boring - - - - - - - - - - - - - - - 70 a a v m a N a N 0 J m `o m N a 0 N to W g U Project Raptor Materials, LLC Project Location P-125 Project Number 2023-RM-P125 4809 Four Star Ct Fort Collins, CO 80524 970-590-3807 Key to Log of Boring Sheet 1 of 1 I O R w ar wU- L a d ❑ N T Ul a E m U1 E Z m E m of U C (0 N m O) d N m o N o. H m m MATERIAL DESCRIPTION u uUuuuu u Water Content, % U d L O1 C REMARKS AND OTHER TESTS u ,1 r� COLUMN DESCRIPTIONS Elevation (feet) Elevation (MSL, feet) ❑9 Water Content, % Water content of the sod sample, expressed as Depth (feet) Depth in feet below the ground surface percentage of dry weight of sample Sample Type Type of sod sample collected at the depth interval In Dry Unit Weight, pcf Dry weight per unit volume of sod sample shown measured in laboratory, in pounds per cubic foot 5 40 Sample Number Sample identification number 0 Well Log Graphical representation of well installed upon Sampling Resistance, blows/ft Number of blows to advance driven completion of drilling and sampling sampler one foot (or distance shown) beyond seating interval ® REMARKS AND OTHER TESTS Comments and observations using the hammer identified on the bonng log regarding dnlhng or sampling made by driller or field personnel ElMatenal Type Type of matenal encountered Graphic Log Graphic depiction of the subsurface material encountered ® MATERIAL DESCRIPTION Descnption of material encountered May include consistency, moisture, color, and other descnptive text 1 2 3 FIELD AND LABORATORY TEST ABBREVIATIONS CHEM Chemical tests to assess corrosivity COMP Compaction test CONS One-dimensional consolidation test LL Liquid Limit, percent MATERIAL GRAPHIC SYMBOLS •iii yv yv 9's9� e®e� Bentonite chips Portland Cement Concrete Well graded GRAVEL (GW) TYPICAL SAMPLER GRAPHIC SYMBOLS i Auger sampler Bulk Sample 3 -inch -OD California w/ brass nngs z CME Sampler Grab Sample 2 5 -Inch -OD Modified California w/ brass liners PI Plasticity Index, percent SA Sieve analysis (percent passing No 200 Sieve) UC Unconfined compressive strength test, Qu, in ksf WA Wash sieve (percent passing No 200 Sieve) Low plasticity PEAT (OL) Shale Well graded SAND with Silt (SW-SM) OTHER GRAPHIC SYMBOLS Pitcher Sample -3 Water level (at time of dnlling, ATD) Water level (after wafting) 2 -inch -OD unlined split spoon (SPT) Minor change in matenal properties within a 1 stratum Shelby Tube (Thin -walled, — — Inferred/gradational contact between strata fixed head) —4— Quened contact between strata GENERAL NOTES 1 Sod classifications are based on the Unified Soil Classification System Descnptions and stratum lines are interpretive, and actual lithologic changes may be gradual Field descriptions may have been modified to reflect results of lab tests 2 Descnptions on these logs apply only at the specific bonng locations and at the time the bonngs were advanced They are not warranted to be representative of subsurface conditions at other locations or times Figure B-1 Protect Raptor Materials, LLC Protect Location P-125 AWES, LLC 4809 Four Star Ct Fort Collins, CO 80524 Log of Boring MW -4 Sheet 1 of i Protect Number 2023-RM-P125 970-590-3807 Date's) 8/2212023 Drilled Logged By JLA Checked By Dnllmg HSA Method Dnil Bit 25 Srceffype Total Depth 25 feet bgs of Borehole Drill Rig Dtednch Type Drilling DrdlPro Services Contractor Approximate Surface Elevation Groundwater Level and Date Measured 8' bgs Sampling Methods) Cuttings Hammer Data Percussion Borehole Backfill Location Far Northwest Well N a m 0 5- 10 — 157 207 257 307 35 - 407 45 - 507 557 607 657 70 N O. H N n E m ❑ H J � U � a m � C7 MATERIAL DESCRIPTION Water Content, % Dry Unit Weight, pcf o� Top soil/overburden, dark brown, moist, some i sw 1;.:�sand and gravel /_ +' Sand, poorly sorted, fine to coarse grained, - • � with gravel, wet at 6' bgs GW '.v ��v • ® • ,-, Gravel, well graded, red -brown, wet '.4 §7" - Shale, dark grey, very stiff End of bonng OJ J 3 REMARKS AND OTHER TESTS 7- Concrete ;�— Bentonite chips blank riser 1" 0 01 slot PVC well screen Project Raptor Materials, LLC Project Location P-'125 Project Number 2023-RM-P'125 AWES, LLC 4809 Four Star Ct Fort Collins, CO 80524 970-590-3807 Key to Log of Boring Sheet 1 of 1 N c O [0 w N .c o. a) 0 N o. N a E ro N E Z N E ro a� U C ro N O rn c d E ro 3 O .n N d (0 ro MATERIAL DESCRIPTION Water Content, % Dry Unit Weight, pcf rn J REMARKS AND OTHER TESTS n a v` a N a N 0 J m `o m N a tt N N O N N W s U u uuuuuu COLUMN DESCRIPTIONS u Elevation (feet) Elevation (MSL, feet) Q9 Water Content, % Water content of the soil sample, expressed as Depth (feet) Depth in feet below the ground surface percentage of dry weight of sample Sample Type Type of sod sample collected at the depth interval ® Dry Unit Weight, pcf Dry weight per unit volume of soil sample shown measured in laboratory, in pounds per cubic foot 5 4e Sample Number Sample identification number Q Well Log Graphical representation of well installed upon Sampling Resistance, blows/ft Number of blows to advance dnven completion of drilling and sampling sampler one foot (or distance shown) beyond seating interval © REMARKS AND OTHER TESTS Comments and observations using the hammer identified on the bonng log regarding drilling or sampling made by driller or field personnel 86 Matenal Type Type of material encountered 7 Graphic Log Graphic depiction of the subsurface material encountered ® MATERIAL DESCRIPTION Descnption of material encountered May include consistency, moisture, color, and other descriptive text 1 2 3 FIELD AND LABORATORY TEST ABBREVIATIONS CHEM Chemical tests to assess caraway COMP Compaction test CONS One-dimensional consolidation test LL Liquid Limit, percent MATERIAL GRAPHIC SYMBOLS T� q9 9 e� O Bentonite chips Portland Cement Concrete Well graded GRAVEL (GW) TYPICAL SAIVIPLER GRAPHIC SYMBOLS Auger sampler Bulk Sample 3 -inch -OD California w/ brass nngs CME Sampler Grab Sample 2 5 -inch -OD Modified California w/ brass liners PI Plasticity Index, percent SA Sieve analysis (percent passing No 200 Sieve) UC Unconfined compressive strength test, Qu, in ksf WA Wash sieve (percent passing No 200 Sieve) l Low plasticity PEAT (OL) Shale Well graded SAND (SW) OTHER GRAPHIC SYMBOLS Pitcher Sample —Li Water level (at time of drilling, ATD) —3 Water level (after wafting) 2 -inch -OD unlined split spoon (SPT) Minor change In matenal properties within a stratum Shelby Tube (Thin -walled, — — Inferred/gradational contact between strata fixed head) —?— Quened contact between strata GENERAL NOTES 1 Soil classifications are based on the Unified Soil Classification System Descnptions and stratum lines are interpretive, and actual lithologic changes may be gradual Field descriptions may have been modified to reflect results of lab tests 2 Descnptions on these logs apply only at the specific bonng locations and at the time the bonngs were advanced They are not warranted to be representative of subsurface conditions at other locations or times Figure B-1 C,WES12022-RM P125\Boring Logs P125 b Project Raptor Materials, LL.C Project Location P-125 Project Number 2023-RM-P125 AWES LLC 4809 Four Star Ct Fort Collins, CO 80524 970-590-3807 Log of Boring MW -5 Sheet 1 of 1 Date's) 8/23/2023 Dnlled Logged By JLA Checked By Drilling HSA Method Dnll Bit 4 25 Siz&Type Total Depth 43 feet bgs of Borehole Dnll Rig Diedrich Type _ Dnllmg DrillPro Services Contractor Approximate 4800 Surface Elevation Groundwater Level 13' bgs and Date Measured Sampling Cuttings Method(s) Hammer Percussion Data Borehole Backfill Location Far Southwest Well v o m w F, w o N a E �+ m ai a o C N N � _- o y •- y a I- m I g „,m J r o. 6 MATERIAL DESCRIPTION o - C CO U °.-' � U D L m m ?> o o J d REMARKS AND OTHER TESTS — ° - oL Top sod/overburden, dark brown, moist, some sand and gravel _ .i'i'il •� ;' • Concrete -�'- Bentonite chips ' - _ — - - — - - - - - to— - 1s— - - -r sw _ Sand, poorly sorted, fine to coarse grained, - with gravel, wet at 6' bgs -• — — .` - `— _• - _ . ,.. - r - � . . • • al-. 1" blank riser — - — - ' _- 20 25 —- 3°— - cw '' .. Gravel, well graded, red -brown, wet 'ii P - >ee - ol� t' sl ■�c .' . o lac �A .o . 1" 0 01 slot PVC well screen - - 40— - Shale - Shale, dark grey, very stiff - — — — — 45— 50— 55— so— 65— - End of boring - — — — — — — — — — — _ — 70 Project: Raptor Materials, LLC Project Location: P-125 Project Number: 2023-RM-P125 AWES, L LC 4809 Four Star Ct. Fort Collins, CO 80524 970-590-3807 Key to Log of Boring Sheet 1 of 1 Elevation (feet) a v- a� 0 a) a U cn U c co d Cn co 0 cn .n a) n� H - co 2 0 U d MATERIAL DESCRIPTION CAAWES12022-Rtvl-P1251Boring Logs P125.bg4[P126.1p11 u uuuLai uu COLUMN DESCRIPTIONS 1 2 3 4 5 6 7 8 u Elevation (feet): Elevation (MSL, feet). Depth (feet): Depth in feet below the ground surface. Sample Type: Type of soil sample collected at the depth interval shown. Sample Number: Sample identification number. Sampling Resistance, blows/ft: Number of blows to advance driven sampler one foot (or distance shown) beyond seating interval using the hammer identified on the boring log. Material Type: Type of material encountered. Graphic Log: Graphic depiction of the subsurface material encountered. MATERIAL DESCRIPTION: Description of material encountered. May include consistency, moisture, color, and other descriptive text. FIELD AND LABORATORY TEST ABBREVIATIONS CHEM: Chemical tests to assess corrosivity COMP: Compaction test CONS: One-dimensional consolidation test LL: Liquid Limit, percent MATERIAL GRAPHIC SYMBOLS ,e . ,e .?• •oy .. .. ,e . ,e .p ..Q . �4 Leib ID 11 1 .1 re r • I • • •••• ►v1 r • es • M Bentonite chips Portland Cement Concrete Well graded GRAVEL (GW) TYPICAL SAMPLER GRAPHIC SYMBOLS 0 �4 D 4 4 Auger sampler Bulk Sample 3 -inch -OD California wl brass rings i A CME Sampler Grab Sample 2.5 -inch -OD Modified California wl brass liners 9 hol h 1 h2I Water Content, y REMARKS AND OTHER TESTS Lai 10 11 1�2 Water Content, %: Water content of the soil sample, expressed as percentage of dry weight of sample. Dry Unit Weight, pcf: Dry weight per unit volume of soil sample measured in laboratory, in pounds per cubic foot. Well Log: Graphical representation of well installed upon completion of drilling and sampling. REMARKS AND OTHER TESTS: Comments and observations regarding drilling or sampling made by driller or field personnel. PI: Plasticity Index, percent SA: Sieve analysis (percent passing No. 200 Sieve) UC: Unconfined compressive strength test, Qu, in ksf WA: Wash sieve (percent passing No. 200 Sieve) ••••••• ......• ••••••• .•••••• ••••••• w ..... • Low plasticity PEAT (OL) Shale Well graded SAND (SW) OTHER GRAPHIC SYMBOLS Pitcher Sample 2 -inch -OD unlined split spoon (SPT) Shelby Tube (Thin -walled, fixed head) 1 Water level (at time of drilling, ATD) Water level (after waiting) Minor change in material properties within a stratum Inferred/gradational contact between strata -2- Queried contact between strata GENERAL NOTES 1: Soil classifications are based on the Unified Soil Classification System. Descriptions and stratum lines are interpretive, and actual lithologic changes may be gradual. Field descriptions may have been modified to reflect results of lab tests. 2: Descriptions on these logs apply only at the specific boring locations and at the time the borings were advanced. They are not warranted to be representative of subsurface conditions at other locations or times. Figure B-1 Project Raptor Matenals, LD_C AWES L LC Log of Boring MW -6 Project Location P-125 4809 Four Star Ct Fort Collins, CO 80524 Sheet I of I Project Number 2023-RiVi-P125 970-590-3807 Date's) 8/23/2023 Drilled Logged By JLA Checked By Drilling HSA Method DnII Bit4 25 SrzelType Total Depth 53 feet bgs of Borehole Dnll Rig Type _Diedrich Dnllmg Contractor DrillPro Services Approximate Surface Elevation 4800 Groundwater Level 16' bgs and Date Measured Sampling Cuttings Method's) Hammer Percussion Data Borehole Backfill Location Far Southeast Well a a N a 9 a w L a a� O eI d N a E m N E Z N o. E m rn MATERIAL DESCRIPTION Water Content, % 10, 15 - 20, 25, 30- 35 - 40, 45 - 50, 55, 60 — 65, 70 oL Top soil/overburden, dark brown, moist, some - - sand and gravel - SW • . • ,-Sand, poorly sorted, fine to coarse grained, with gravel, wet at 6' bgs :r soon Gravel, well graded, gravel sand mixture, red -brown, wet oo. Pe... '2 �l� �: Op Pv .off .e. .A. ��a fir• - • a er 'Pm eC Pi P .m.r- Shale - Shale, dark grey, very stiff ow - End of boring i D) J d REMARKS AND OTHER TESTS Concrete Z.. Bentonite chips • 1" 0 01 slot PVC well screen Project Raptor Materials, LLC A'.' ES, LLC Key to Log of Boring Project Location P-125 4809 Four Star Ct Fort Collins, CO 80524 Sheet 1 of 1 Project Number 2023-RM-P125 970,90-3807 N L o. a� O UJ T F- N d E „ N .O E J Z U7 E m u7 a� U C O N N rn C d N E 3 m a g� MATERIAL DESCRIPTION Water Content, % Dry Unit Weight, pcf m J REMARKS AND OTHER TESTS u uL31uuuu u U 11 COLUMN DESCRIPTIONS Elevation (feet) Elevation (MSL, feet) Q9 Water Content, % Water content of the soil sample, expressed as Depth (feet) Depth in feet below the ground surface percentage of dry weight of sample Sample Type Type of sod sample collected at the depth interval ® Dry Unit Weight, pcf Dry weight per unit volume of sod sample shown measured in laboratory, in pounds per cubic foot e4 Sample Number Sample identification number ©9 Well Log Graphical representation of well installed upon 5 Sampling Resistance, blows/ft Number of blows to advance driven completion of drilling and sampling sampler one foot (or distance shown) beyond seating interval © REMARKS AND OTHER TESTS Comments and observations using the hammer identified on the bonng log regarding drilling or sampling made by dnller or field personnel e6 Matenal Type Type of material encountered 7 Graphic Log Graphic depiction of the subsurface material encountered ® MATERIAL DESCRIPTION Descnption of material encountered May include consistency, moisture, color, and other descnptive text 7 2 3 FIELD AND LABORATORY TEST ABBREVIATIONS CHEM Chemical tests to assess corrosivaty COMP Compaction test CONS One-dimensional consolidation test LL Liquid Limit, percent MATERIAL GRAPHIC SYMBOLS �ap�a O� O4 ,sv ev [oovv PGPGPG�o. Bentonite chips Portland Cement Concrete Well graded GRAVEL (GW) TYPICAL SAMPLER GRAPHIC SYMBOLS Auger sampler . Bulk Sample 3 -inch -OD California w/ brass nngs y CME Sampler Grab Sample 2 5 -inch -OD Modified California w/ brass liners r'. PI Plasticity Index, percent SA Sieve analysis (percent passing No 200 Sieve) UC Unconfined compressive strength test, Qu, in ksf WA Wash sieve (percent passing No 200 Sieve) i Low plasticity PEAT (OL) Shale Well graded SAND (SW) OTHER GRAPHIC SYMBOLS Pitcher Sample - Water level (at time of dnlling, ATD) =1 Water level (after warhng) 2 -inch -OD unlined split spoon (SPT) Minor change in material properties within a stratum Shelby Tube (Thin -walled, — — Inferred/gradational contact between strata fixed head) — 't— Queried contact between strata GENERAL NOTES 1 Sod classifications are based on the Unified Sod Classification System Descnptions and stratum lines are interpretive, and actual lithologrc changes may be gradual Field descnpttons may have been modified to reflect results of lab tests 2 Descnptions on these logs apply only at the specific bonng locations and at the time the bonngs were advanced They are not warranted to be representative of subsurface conditions at other locations or times Figure B-1 r k AT II 'iCHMEll T C PC SYASL RESULTS 4"' 70 65 60 50 45 40 �C LI•J 10 - 0 Problern Raptor- Pit 125 i Min- Bishop __ -10 . -15 . -25 MEP Y 1 r _ 1 Y i J Soils Cohesion Bedrock Bead Grvl Bead Water Table Critical Surface 500.0 0.0 0.0 Friction Angle 22.0 38.2 35.4 est 1 1 1 r Ir r 1 1 1 1 r / 1 J ! 1 i 1 ! r J J 1 { 1 ,.1... J J 1 1 1 1 1 1 1 1 1 _L J J 1 1 1 1 1 r 1 1 1 I 1 1 1 1 1 J J J SIP r i _I 0 • 1 1 1 1 1 Iii I r 1 t 1 M 1 1 r 1 1 t 1 1 1 1 I 1 1 1 1 1 J. I� d Vt 'DO L 1 1 ! L 1 1 ! 1 r ! 1 1 t L t • er 1 1 w 30 } r r 1 1 1 1 i 1 t I 1 • 1 1 1 1 t • 1 1 1 1 1 40 'P. J A 1 1 1 1 1 r 1 1 1 1 1 • 4, 60 7n (Scale in Fret) r t 1 1 L i r • 8n 1 1 1 1 ! ! 90 .1 00 1 1 1 J 1 1 I J ! 110 � 1 1 I 1 A 1 1 1 L 1 1 M L 1 1 1 L 1 1 1 L — — — L ..... 1 1 1 OW IMO r ..... . ! t 1 N 130 asammdmIs Y—! L d 70 6r 60 55 50 45 40 35 30 15 10 .5 10 15 Problem: Two 11 Rivers Stability' Analysis J - F Lz-s) Ndi Bi shop = 1 fav ��• ANS Y Bedrock Sand w Grvl Sand . Overburden C Water Table ♦ Critical Surface Soils Cohesion Friction Angle 22.0 38.2 32.6 28.0 500.0 0.0 0.0 150.0 T —r t a 1 1 a u 1 1 1 T 1 1 1 1 1 1 T 1 1 1 T r 1 1 r 1 1 1 1 r I 1 1 1 I— 1 I 1 — — — 1 1 1 1 1 1 1 1 1 1 1 1 1 1 T r r _ 1 1 1 1 1 - - a a 1 1 1 1 1 1 1 t 1 1 1 I 1 1 1 T 1 1 i f a r 1 T r 1 1 1 1 n 90 .100 .110 120 1 1 Y T 1 1 r 1 1 t I 1 r 1 r 1 1 1 a 1 1 1 1 r r 1 1 r 1 1 a r i I 1 1 1 1 1 1 1 1 1 1 1 1 1 r 1 1 r 1 1 1 1 r r 1 a 1 1 r • a — — IS — — — r r r OP — ., — MP —— __ - — — — _ S lag Mill a -10 0 •10 i n HI 40 50 CIO 70 (Scale in Feet) 1 1 130 Consultants in Natural Resources and the Environment Technical Memorandum File and Literature Review P125 Gravel Dine Project Weld County, Colorado Prepared for — Raptor Materials 8120 Gage Street Erie, Colorado 80516 September 13, 2024 Raptor Materials (Client) retained ERO Resources Corporation (ERO) to perform a cultural resource file and literature review for a proposed gravel mine (project) located south of State Highway 66 and west of Weld County Road 17 in Weld County, Colorado (project area, Figure 1, attached) The project proposes to construct a commercial gravel mine on former agricultural land The proposed project may require a U S Army Corps of Engineers (Corps) Clean Water Act Section 404 Permit for proposed modifications to wetlands, therefore, compliance with Section 106 of the National Historic Preservation Act (NHPA) may be required The results of the file and literature review will provide the Client's planners with information regarding known and potential cultural resources as well as a summary of potential regulatory requirements that could stipulate for additional cultural resource identification and documentation This technical memorandum can also be used by the Corps to determine if any additional efforts are necessary to comply with the NHPA Project ^ rea _The project area includes four discontinuous but adjacent areas of potential ground disturbance including the limits of disturbance to construct a gravel mine complex (125 83 acres) The project area is south of State Highway 66 and west of Weld County Road 17 An unnamed dirt road extending from Weld County Road 26 % trends northeast -southwest and bisects the project area The St Vram River flows north to south and is located to the west Agricultural land surrounds most of the project area with modern residential developments located to the south and west The project area is in Section 29, Township 3 North, Range 67 West of the 6th Principal Meridian in Weld County, Colorado (Figure 2) ERO Project .4-180 1 ERO Resources Corporation Technical Memorandum File and Literature Review P125 Gravel Mine Project, Weld County, Colorado Methodology The purpose of the cultural resource file and literature review is to determine if any previously documented cultural resources listed in or eligible for listing in the National Register of Historic Places (NRHP) or State Register of Historic Places (SRHP) could be impacted by the proposed project. A "cultural resource" is defined as an archaeological site, structure, or building constructed 50 or more years ago (Little et al. 2000). A cultural resource listed in or eligible for listing in the NRHP/SRHP is a "historic property." To assist with project planning and potential consultation obligations under Section 106 of the NHPA (36 Code of Federal Regulations 800) and the State Register Act (Colorado Revised Statutes 34-80.1-104), ERO reviewed the previous cultural resource surveys and resource documentation completed in the project area by conducting a file search with the Office of Archaeology and Historic Preservation (OAHP). The OAHP provided the results to ERO on August 1, 2024 (File Search No. 00-3637). Results The file search identified no previous cultural resource surveys that intersect the project area. However, the file search identified three previous cultural resource surveys located just north of the project area (Table 1). All surveys were completed from 2005 to 2012. nventories near the project area. . M .�.. r. _ -' State Project No. Report Title (Date) Institution MC.CH.R175 An Intensive Archaeological Resource Improvements on US Highway 287 Counties, Colorado (Sta-R400-173) Inventory of Proposed Safety and State Highway 66, Lorimer and Weld (2005) Colorado Transportation Department (CDOT) of WL.CH.NR44 An Intensive Archaeological Resource Inventory River Realignment on State Highway 66 Colorado (CDOT # STA 0661-009) (2006) of the Proposed St. Vrain West of Gowanda, Weld County, CDOT WL.CH.NR55 An Intensive Cultural Resources Inventory for the Replacement Vrain River Bridge on State Highway 66, Weld County 006a-002/STA 066a-001, SH 66 at St. Vrain Bridge) (CDOT (2012) of the St. Project FBR CDOT The OAHP records indicate no previously documented cultural resources are in the project area (Table 2). Resources recorded north of the project area consist of two historical resources. The resources include a segment of the Last Chance Ditch (5WL1975.3) and St. Vrain River Bridge D -17 -AK (5WL3007). rded cultural resources near the project area. Smithsonian Site No. Associated Report Nos. Resource Name/Type NRHP Eligibility Status (Date) SWL1975.3 Not listed Last Chance Ditch Segment Officially Eligible (2006) 5WL3007 MC.CH.R100 St. Vrain River Bridge D -17 -AK Officially Not Eligible (2002) In addition to the OAHP file search, ERO reviewed existing literature, historical maps, public records, General Land Office (GLO) records, and aerial images to assess the potential for unknown historical resources, such as roads, ditches, and buildings, in the project area. ERO reviewed maps dating from 1863 to 1950 (General Land Office 1863; U. S. Surveyor General's Office 1902, 1950, 1957; U.S. Surveyor ERO Project #24-180 2 ERO Resources Corporation Technical Memorandum File and Literature Review P125 Gravel Mine Project, Weld County, Colorado General's Office 1949) and aerial images from 1948 to 2023 (Google, Inc 2024, Nationwide Environmental Title Research 2024) A portion of an unnamed ditch and a trail are mapped on the original 1863 GLO survey plat in the general project location (General Land Office 1863) By 1902, at least one building is mapped near the northeastern section of the project area, later maps and aerial imagery indicate that this structure was removed by 2019 (Nationwide Environmental Title Research 2024, U S Surveyor General's Office 1902, U S Surveyor General's Office 1949) The building location is close enough to the project area that historical materials could exist in the project area (Google, Inc 2024) Topographic maps dating between 1949 and 1950 depict a segment of the Union Pacific Railroad that directly intersects the project area diagonally from the southwest to the northeast This segment was decommissioned by the 2010s A two -track road is near the railroad According to the Client's plans, the abandoned grade is situated to the west of the extant road Per recent guidance from the OAHP, unnamed, unimproved roads typically do not require documentation as cultural resources (Horn and Norton 2021) ERO evaluates the potential for buried cultural resources through surface geology and topographic maps Sediments are consistent throughout the project area and are mapped as Holocene in age (Tweto 1979) Light disturbances to the project area began, approximately, in the late 1800s in association with agricultural activity (Google, Inc 2024) The railroad has disturbed a small linear segment in the project area, while other sections, specifically near the St Vrain River, appear to be undisturbed- Because of the presence of Holocene -aged deposits and the overall,light disturbance, undocumented buried Native American resources are potentially present to the project area, especially in the western section of the project area along the St Vram River This area has a higher chance of containing Native American resources because it is near a prominent water source, appears undisturbed, and has an increased chance for deep soil deposits Summary Although no previously documented cultural resources are m the project area, the file search and literature review indicates that an abandoned segment of the Union Pacific Railroad exists in the project area Additionally, historical remains could be present in the northeastern section of the project area near where.a historic agricultural complex was removed in 2019 Due to the lack of previous surveys in the project area and the presence of permanent water sources, undocumented Native American sites are potentially present in the project area Furthermore, the presence of Holocene -aged sediments also indicate a potential for subsurface cultural deposits If a permit is required by the Corps, additional work may be necessary to satisfy Section 106 of the NHPA ERO can assist in any survey, documentation, or reporting required Please feel free to contact ERO by email at mdinkel@eroresources com or by phone at (303) 830-1188 with any questions you may have in reference to the file and literature review results and additional work potentially needed for NHPA or State Register Act compliance ERO Project #24-180 3 ERO Resources Corporation Technical Memorandum File and Literature Review P125 Gravel Mine Project, Weld County, Colorado Certification of Results nvit,A-0..i),....t._ Michelle Dinkel; Staff Archaeologist Attachments Figure 1 Project location Figure 2 Existing Conditions References Cited Colorado Office of Archaeology and Historic Preservation 2024 Compass Colorado Historical Society - Office of Archaeology and Historic Preservation Compass - Colorado's On-line Cultural Resource Database . https //gis colorado gov/compass/OAHP/M_Search_e asp, accessed May 14, 2024 General Land Office 1863 Township 3 North, Range 67 West -GLO Original Survey Plat. U S Surveyor General's Office Google, Inc 2024 Google Earth Pro Google Earth Pro version 7 3 3 7786 (64 -bit) Online database, https //earth google com/web Horn, Jonathon C , and Holly K Norton 2021 Walking the Line Guidance for Identification, Evaluation, and Field Recordation of Historical Linear Sites in Colorado Written by Alpine Archaeological Consultants, LLC for History Colorado Little, Barbara, Erika M Seibert, Jan Townsend, John H Sprinkle Jr, and John Knoerl 2000 National Register Bulletin Guidelines for Evaluating and Registenng Archaeological Properties Prepared by the U S Department of the Interior Nationwide Environmental Title Research 2024 Histonc Aerials National Environmental Title Research LLC Online database, https //www histoncaenals com/viewer Tweto, Ogden 1979 Geologic Map of Colorado 1 500,000 U S Geological Survey Special Geologic Map Department of the U S Geological Survey, Colorado U S Surveyor General's Office 1902 Greeley 1125000 Topographic Quadrangle Map U S Surveyor General's Office 1950 Gowanda 1 24000 Topographic Quadrangle Map U S Surveyor General's Office ERO Project #24-180 4 ERO Resources Corporation Technical Memorandum File and Literature Review P125 Gravel Mine Project, Weld County, Colorado 1957 Greeley 1 125000 Topographic Quadrangle Map U S Surveyor General's Office U S Surveyor General's Office 1949 Gowanda 1 24000 Topographic Quadrangle Map U S Surveyor General's Office ERO Project #24-180 5 ER0 Resources Corporation a ro z v u V V L' ry ry CL 0 M W 1 CJ rig d 5 W .r -a fl t Vrain Sch P125 Gravel Mine Weld County, Colorado Section 29, T3N, R67W, 6th PM UTM NAD 83: Zone 13N; 507556mE, 4449406mN Longitude 104.911225°W, Latitude 40.195013°N USGS Gowanda, CO Quadrangle (1:24,000) Weld County, Colorado N 0 A� _ Project Area 1,250 2,500 ' Feet 1:24,000 COLORADO Figure 1 Project Location ERO ERO Resources Corp. Prepared for: Raptor Material File: 24_180 P125 Gravel Mine CR.mxd (GN) September 12, 2024 Portions of this document include intellectual property of ESRI and its licensors and are used herein under license. Hybrid Reference Layer: Esri, TomTom, Garmin, SafeGraph, GeoTechnologies, Inc, METI/NASA, USGS, EPA, NPS, US Census Bureau, USDA, USFWS USA _Topo_Maps: Copyright:0 2013 National Geographic Society, i•cubed, ESRI and its licensors. All rights reserved. P125 Gravel Mine Weld County, Colorado Section 29, T3N, R67W, 6th PM UTM NAD 83: Zone 13N; 507556mE, 4449406mN Longitude 104.911225°W, Latitude 40.195013°N USGS Gowanda, CO Quadrangle (1:24,000) Weld County, Colorado N A 0 Project Area 400 800 Feet 1:6,500 Figure 2 Existing Conditions ERC) ERO Rs -sources Corp. Prepared for: Raptor Material File: 24_180 P125 Gravel Mine CR.mxd (GN) September 12, 2024 Portions of this document include intellectual property of ESRI and its licensors and are used herein under license. USA_Topo_Maps: Copyright:® 2013 National Geographic Society, i•cubed Hybrid Reference Layer: Esri Community Maps Contributors, 0 OpenStreetMap, Microsoft, Esri, TomTom, Garmin, SafeGraph, GeoTechnologies, Inc, METI/NASA, USGS, EPA, NPS, US Census Bureau, USDA, USEWS, ESR1 and its licensors. All rights reserved. Consultants in Natural Resources and the Environment Natural Resources Assessment P125 Gravel Mine Southwest of State Highway 66 and County Road 17 Weld County, Colorado Prepared for — Raptor Matenals 8120 Gage Street Ene, Colorado 80516 Prepared by— ERO Resources Corporation 1626 Cole Boulevard, Suite 100 Lakewood, Colorado 80401 (303) 830-1188 ERO Project #24-180 September 23, 2024 Natural Resources Assessment P125 Gravel Mine - Southwest of State Highway 66 and County Road 17 Weld County, Colorado Contents Executive Summary.. .... Introduction.. ... ........ 1 Project Area I.ocation ••••. •• • • • ••1 Project Background and Environmental Baseline .. 4 Project Area Description ........ . ......... .. . Wetlands and Other Waters of the U S and Waters of the State... ..5 Clean Water Act Section 404 5 State Dredge and Fill Program 5 Methods 6 Recommendations 10 Threatened, Endangered, and Candidate Species .......... 10 Species Eliminated from Further Consideration 11 Threatened and Endangered Species Habitat 12 Other Species and Habitats of Concern 13 Black -Tailed Prairie Dog 13 Western Burrowing Owl 14 Raptors and Migratory Birds 15 Bald Eagle 16 High Prionty Habitat and Big Game ..... .... ..... ........ .. 17 Aquatic Native Species Conservation Waters 19 Mule Deer 19 Other Wildlife 20 References......... ........... .. 20 Tables Table 1 Wetland area, Cowardin classification, and HGM 8 Table 2 IPaC resource list for the project area 11 Figures Figure 1 Vicinity Map 2 Figure 2 Existing Conditions 3 Figure 3 High Priority Habitat 18 Appendices Appendix A Photo Log Appendix B Routine Wetland Determination Data Forms ERO Proiect #24-180 ERO Resources Corporation Natural Resources Assessment P125 Gravel Mine - Southwest of State Highway 66 and County Road 17 Weld County, Colorado Executive Summary Raptor Materials retained ERO Resources Corporation (ERO) to provide a natural resources assessment for the P125 Gravel Mine property (project) southwest of the intersection of State Highway 66 and County Road 17 in Longmont, Weld County, Colorado (project area) ERO assessed the project area for potential wetlands and other waters of the U S , threatened and endangered species habitat, natural resources, and general wildlife use Below is a summary of the resources found at the project area and recommendations or future actions necessary based on the current site conditions and federal, state, and local regulations The natural resources and associated regulations described in this report are valid as of the date of this report and may be relied upon for the specific use for which it was prepared by ERO under contract to Raptor Materials Because of their dynamic natures, site conditions and regulations should be reconfirmed by a qualified consultant before relying on this report for a use other than that for which ERO was contracted Wetlands and Other Waters of the U S — During the 2024 site visit, 5 wetlands and 27 unnamed agricultural ditches were found in the project area Wetland 1 through Wetland 5 are unnamed perennial tributaries that hydrologically connect to St Vrain Creek in the northern portion of the project area The 27 unnamed agricultural ditches used for agricultural irrigation are in the southern portion of the project area Agricultural Ditch 13 through Agriculture Ditch 26 drains into Agriculture Ditch 27 Agricultural ditches are typically exempt and considered nonjunsdictional If any work is planned ►n the unnamed agricultural ditches in the project area, a jurisdictional determ►nation should be requested from the U.S. Army,Corps of Engineers (Corps) If the wetlands or unnamed agricultural ditches are considered jurisdictional and work is planned in any of these areas, a Section 404 Permit would be required from the Corps for the placement of dredged or fill material in wetlands or below the ordinary high water mark If no work is planned in any of these areas, no Corps action is necessary Threatened and Endangered Species —The project area contains habitat for the eastern black rail, a federally listed threatened species Should the project involve habitat -disturbing activities, consultation with the U.S. Fish and Wildhfe Service (Service) would be required. If project activities would occur outside of the suitable habitat for the eastern black rail, ERO recommends submitting a habitat assessment to the Service requesting confirmation that the project would have no adverse impacts on any federally hsted threatened or endangered species. Prairie Dogs —The northern portion of the project area contains a black -tailed prairie dog colony, with some portions extending beyond the project area Weld County does not have any regulations or policies pertaining to prairie dogs, thus if prairie dog removal becomes necessary, Colorado Parks and Wildlife (CPW) protocol will be followed CPW recommends removing the pra►ne dogs in a humane manner before any earthwork or construction takes place Burrowing Owls — Burrowing owls could be impacted by the project if work would occur within the CPW-recommended 0 125 -mile (660 -foot) buffer of any prairie dog burrows (CPW 2020) Praire dog burrows occur in the project area and within 660 feet of the project area If work would occur within the recommended buffer of any burrow dunng the breeding season (March through October), a burrowing owl survey should be conducted If owls are present in the project area, activities should be restricted within 660 feet of nest burrows until the owls have migrated from the site, which can be determined through monitoring The prairie dog colony that is separated from the project area by St ERO Project #24-180 ERO Resources Corporation Natural Resources Assessment P125 Gravel Mine - Southwest of State Highway 66 and County Road 17 Weld County, Colorado Vrain Creek and the riparian corridor may have enough visual separation from the project area for burrowing owl surveys to not be required at this location even though the project area is within 660 feet Migratory Birds — No bird nests were observed during the 2024 site visit, however, trees, shrubs, and upland grasslands in the project area provide potential nesting habitat The Eastern Colorado Field Office of the Service and Colorado Department of Transportation have identified the primary nesting season for migratory birds in eastern Colorado as occurring from April 1 to August 31 (Beane and Salamack 2021, Colorado Department of Transportation 2011) However, some birds, such as the red- tailed hawk and great horned owl, can nest as early as February or March Because of variability in the breeding seasons of various bird species, ERO recommends a nest survey be conducted within one week prior to ground -disturbing or vegetation -disturbing activities to determine if any active nests are present in the project area so they can be avoided If active nests are found, any work that would destroy the nests should not be conducted until the nest fledge or failure has occurred Bald Eagles — A bald eagle nest has been identified 011 mile northeast of the northern project area boundary and could be impacted by the project if a physical object or structure is proposed within the CPW-recommended 0 25 -mile radius of active nests permanently or for a significant amount of time (i e , surface occupancy) or if there would be human encroachment activities within a 0 5 -mile radius of an active nest from December 1 through July 31 (CPW 2020) This nest was not observed during the 2024 site visit If surface occupancy cannot be avoided within 0 25 mile of the nest and the nest is located in a highly developed area, then, through consultation with CPW, the recommended no surface occupancy buffer may be reduced to 0 33 mile (660 feet) from the nest site (CPW 2020) CPW recommends seasonal restrictions beyond July 31 if chicks are still present in the nest CPW has also established recommended buffer zones and seasonal restrictions for eagle winter night roosts and communal roosts Additionally, bald eagle winter concentration and winter forage area are identified in the project area If work would occur within the recommended buffer of the active nest or a winter night or communal roost, ERO recommends consulting with the Service to develop a bald eagle mitigation plan Coordination with CPW may also be appropriate to assess and develop site -specific recommendations based on preexisting conditions Other Wildlife — The project area occurs In Aquatic Native Species Conservation Waters and Mule Deer Migration Corridors and Severe Winter Range (CPW 2021) No other sensitive species occur in the project area that would be significantly adversely affected by the proposed project. Overall, surrounding and continuing development contributes to a decline in the number and diversity of wildlife species nearby and to a change in species composition ERO Project #24-180 ERO Resources Corporation Natural Resources Assessment P125 Gra : el Mine Southwest it State Highway 66 and County Road 17 Weld Copan Colorado September 20, 2024 Introduction Raptor Materials retained ERO Resources Corporation (ERO) to provide a natural resources assessment for the P125 Gravel Mine property (project) southwest of the intersection of State Highway 66 and County Road 17 in Longmont, Weld County, Colorado (project area, Figure 1) On July 11 and July 12, 2024, Marie Russo and Ashlee Caruana, biologists with ERO, assessed the project area for natural resources (2024 site visit) During this assessment, activities included a delineation of potential wetlands and other waters of the U S (WOTUS), identification of suitable habitat for federally listed threatened, endangered, and candidate (T&E) species, and identification of other natural resources This report provides information on existing site conditions and resources, as well as current regulatory guidelines related to those resources ERO assumes the landowner is responsible for obtaining all federal, state, and local permits for construction of the project The natural resources and associated regulations described in this report are valid as of the date of this report and may be relied upon for the specific use for which it was prepared by ERO under contract to Raptor Materials Because of their dynamic natures, site conditions and regulations should be reconfirmed by a qualified consultant before relying on this report for a use other than that for which ERO was contracted fir ject ree Location The project area is in Section 29, Township 3 North, Range 67 West of the 6th Principal Meridian in Weld County, Colorado (Figure 1) The UTM coordinates for the approximate center of the project area are 507688mE, 4449436mN, Zone 13 North The longitude/latitude of the project area is 104 909671°W/40 195283°N The elevation of the project area is approximately 4,790 feet above sea level Photo points of the project area are shown on Figure 2, and the photo log is in Appendix A ERO Project #24-180 1 ERO Resources Corporation at P125 Gravel Mine, Weld County Section 29, T3N, R67W; 6th PM UTM NAD 83: Zone 13N; 507688mE, 4449436mN Longitude 104.909671°W, Latitude 40.195283°N USGS Gowanda, CO Quadrangle Weld County, Colorado Sources: Esri, HERE, Garmin, Intermap, increment P Corp., GEBCO, USGS, FAO, NPS, NRCAN, GeoBase, IGN, Kadaster NL, Ordnance Survey, Esri Japan, METI, Esri China (Hong Kong), (c) OpenStreetMap contributors, and the GIS User Community Copyright:® 2013 National Geographic Society, 1 -cubed �. 4. ttaitionsonsis _ 0 r -- Y T 750 1,500 �i feet Gowanda n - _a=7,E se. 66reeSea t I I I 1 Coant y Road 28 Lupton Bottom D? tsh Cut/nt., Figure 1 Vicinity Map Prepared for: Raptor Materials File: 24_180 Figure 1.mxd [dill] July 17, 2024 ERA ERO Resources Corp. Portions of this document include intellectual property of ESRI and its licensors and are used herein under license. Copyright © 2024 ESRI and its licensors. All rights reserved. Esri, HERE, Garmin, (c) OpenStreetMap contributors Source: Esri, Maxar, Earthstar Geographics, and the GIS User Community Natural Resources Assessment P125 Gravel Mme - Southwest of State Highway 66 and County Road 17 Weld County, Colorado Project Background and Environmental Baseline During the 2024 site visit, ERO assessed the project area for natural resources including a delineation of potential wetlands and other WOTUS, identification of suitable habitat for federally listed T&E species, and identification of other natural resources In addition to the information gathered during the 2024 site visit, natural resource information was obtained from existing databases and sources such as aerial photography, the Colorado Natural Diversity Information Source (NDIS), Colorado Parks and Wildlife (CPW) map databases, the U S Fish and Wildlife Service (Service) National Wetlands Inventory (NWI) database, the U S Geological Survey (USGS) National Hydrography Dataset (NHD), the Colorado Natural Heritage Program (CNHP), and other sources (Google, Inc 2024, NDIS 2021, CPW, n d -a, Service, n d , USGS 2024, CNHP 2024) Project rea Description The U S Department of Agriculture (USDA) has mapped the project area within the Central High Plains, Southern Part Major Land Resource Area, which is mainly characterized as elevated piedmont plains abutting the foothills of the Rocky Mountains (USDA, Natural Resources Conservation Service [NRCS] 2006) Precipitation is typically low as most of the region is on the leeward side of the mountains The average annual precipitation in this region is between 13 and 22 inches (USDA NRCS 2006) The topography of the project area is generally flat (Photo 1) The project area is surrounded by agricultural and commercial properties with limited residential development south of State Highway 66, north of Weld County Road 28, and west of Weld County Road 17 (Figure 1) The project area consists of flood -irrigated alfalfa fields,and an organic dairy cattle pasture (Figure 2, Photo 1, Photo 2, and Photo 3) The vegetation in the project area includes alfalfa (Mechcago sotiva), western wheatgrass (Pascopyrum smithu), cheatgrass (Bromus tectorum), fltxweed (Descuramia sophia), squirreltail (Elymus elymcndes), little hogweed (Portulaca oleracea), pigweed (Amaranthus species), and kochia (Bassia scopana) (Photo 1, Photo 2, and Photo 3) The riparian community contains species such as plains cottonwood (Populus deltoides spp monthfera), peachleaf willow (Salix amygdaloides), smartweed (Perslcana amphibia), curly dock (Rumex cnspus), and Pennsylvania bittercress (Cardamine pensylvanica) (Photo 6 and Photo 7) In the project area, 5 wetlands are in the northern portion and 27 agricultural ditches run through the southern portion (AgDitch1 through AgDitch27) (Photo 4 through Photo 9) AgDitch1 through AgDitch27 only flow when flood irrigation occurs to support the alfalfa fields in which they are located AgDitch1 through AgDitch12 drain southwest back into Last Chance Ditch AgDitch13 through Ag Ditch26 drain northwest into Wetland 5 and eventually into an unnamed tributary to St Vrain Creek Wetland 1 and Wetland 2 drain into an unnamed perennial tributary to St Vrain Creek and then into St Vrain Creek Wetland 3 and Wetland 4 are located in an oxbow channel of St Vrain Creek and drain to St Vrain Creek Wetland 5 drains into an unnamed tributary to St Vrain Creek ERO Project #24-180 4 ERO Resources Corporation Natural Resources Assessment P125 Gravel Mine - Southwest of State Highway 66 and County Road 17 Weld County, Colorado During the 2024 site visit, a black -tailed prairie dog (Cynomys ludovicianus) colony was observed in the northern portion of the project area (Figure 2) Wetlands and Other Wafers of the U.S. and Waters ®f the State Clean Water Act Section 4®4 The Clean Water Act (CWA) protects the chemical, physical, and biological quality of WOTUS The U S Army Corps of Engineers' (Corps) Regulatory Program administers and enforces Section 404 of the CWA Under Section 404, a Corps permit is required for the discharge of dredged or fill material into wetlands and other WOTUS (streams, ponds, and other waterbodies) Since the regulatory program was initiated, the definition of WOTUS has changed frequently due to United States Supreme Court (Supreme Court) decisions and new rules proposed by presidential administrations On August 29, 2023, the U S Environmental Protection Agency and Corps announced a final rule amending the 2023 definition of , "waters of the U S " to conform with the Supreme Court ruling under Sackett v Environmental Protection Agency, No 21-454 The amended rule reduces the jurisdiction of the CWA over wetlands adjacent to bodies of water that do not have a continuous surface connection to other known WOTUS, as well as streams that do not have continuous flowing or relatively permanent water The amended rule removes the "significant nexus" standard that was created under Rapanos v United States, removes interstate wetlands from the definition of WOTUS, and revises the definition of "adjacent" to mean "having a continuous surface connection " Potential rulings and guidance in the future could change the results of this report regarding the jurisdictional status of waters and wetlands in the project area While ERO may provide its opinion on the likely jurisdictional status of wetlands and waters, the Corps will make the final determination of jurisdiction based on the current rulings State Dredge and Fill Program On May 6, 2024, the Colorado Legislature passed House Bill (HB) 24-1379, which creates a dredge and fill permit program (program) for the State of Colorado The program will apply to all state waters, including wetlands, that are not protected under the federal CWA Section 404 If a CWA Section 404 Permit is obtained from the Corps, or the project has a valid approved jurisdictional determination from the Corps that was issued prior to May 25, 2023, then authorization from the state would not be required The program will require authorization from the Colorado Department of Public Health and Environment (CDPHE) for the placement of dredged or fill material into state waters where the wetlands or open water have been determined to not be WOTUS CDPHE has until December 31, 2025 to go through rulemakmg, which will create general and individual permits similar to CWA Section 404 Permits Until the program is in place, CDPHE has issued Clean Water Policy 17, which allows for enforcement discretion for activities in state waters that would have previously required a CWA Section 404 Permit If a project would impact state waters that are no longer considered WOTUS and require a CWA Section 404 Permit, Clean Water Policy 17 applies The policy allows for enforcement discretion if permanent impacts on state waters would be less than 010 acre on wetlands or 0 03 acre on streambeds and ERO Project #24-180 5 ERO Resources Corporation Natural Resources Assessment P125 Gravel Mine - Southwest of State Highway 66 and County Road 17 Weld County, Colorado notification is submitted to CDPHE If impacts would exceed those thresholds, HB 24-1379 states CDPHE may issue temporary authorizations for the activities if it would result in net increases in the function and services of state waters (only to stream impacts), or the applicant shows proof of purchase of mitigation bank credits that meet or exceed the compensatory mitigation requirements that would have been applicable under federal Nationwide Permits or Regional General Permits Beginning January 1, 2025, CDPHE will use existing Nationwide Permits and Regional General Permits for compliance with impacts on state waters until rulemaking is completed and CDPHE has issued general authorizations Applicants may submit a preconstruction notification as required under the CWA Section 404 for authorization If compensatory mitigation is required, the applicant will be required to obtain temporary authorization from the CDPHE as discussed above Methods Wetland Delineation During the 2024 site visit, ERO surveyed the project area for potential isolated wetlands, jurisdictional wetlands, and other WOTUS Before the 2024 site visit, ERO reviewed USGS topographic quadrangle maps, the NWI database, the NHD, and aerial photography to identify mapped streams and areas of open water that could indicate wetlands or WOTUS (USGS 2022, Service, n d , USGS 2024, Google, Inc 2024) ERO conducted the wetland delineation following the methods for routine on -site wetland determinations as described in the 1987 Corps of Engineers Wetlands Delineation Manual and used methods in the Regional Supplement to the Corps of Engineers Wetland Delineation Manual Great Plains Region (Version 2 0) to determine wetland boundaries (Environmental Laboratory 1987, Corps 2010) The Corps defines wetlands as "areas that are inundated or saturated by surface or ground water at a frequency and duration sufficient to support, and that under normal circumstances do support, a prevalence of vegetation typically adapted for life In saturated soil conditions Wetlands generally include swamps, marshes, bogs, and similar areas" (33 Code of Federal Regulations [CFR] 328 2(c)) Wetland boundaries were determined by a visible change in vegetation community, soils, topographic changes, and other visible distinctions between wetlands and uplands The wetland indicator status of plant species was identified using the National Wetland Plant List, taxonomy was determined using Flora of Colorado, and nomenclature was determined using the PLANTS Database (Corps 2020, Ackerfield 2015, USDA, MRCS 2024) Intermittent, ephemeral, and perennial drainages with characteristics of a defined streambed, streambank, ordinary high water mark (OHWM), and other erosional features also were identified The OHWM identifies the lateral jurisdictional limits of nonwetland WOTUS Federal Jurisdiction over nonwetland WOTUS extends to the OHWM, defined in 33 CFR 328 3 as "the line on the shore established by fluctuations of water and indicated by physical characteristics such as a clear, natural line impressed on the bank, shelving, changes in the character of the soil, destruction of terrestrial vegetation, the presence of litter and debris, or other appropriate means that consider the ERO Project #24-180 6 ERO Resources Corporation Natural Resources Assessment P125 Gravel Mine - Southwest of State Highway 66 and County Road 17 Weld County, Colorado characteristics of the surrounding areas " The Corps defines "stream bed" as "the substrate of the stream channel between the OHWMs The substrate may be bedrock or inorganic particles that range in size from clay to boulders " The boundaries of identified wetlands and other characteristics of potential WOTUS were mapped using a Trimble Global Positioning System (GPS) unit Data were differentially corrected using the CompassCom base station All differential_correction was completed using Trimble Pathfinder Office 5 9 software GPS data were incorporated using ESRI® ArcGIS Desktop software Additionally, where appropriate, wetlands were drawn on georectified aerials and then digitized Wetland Classification Delineated wetlands were classified according to the U S Fish and Wildlife Service's Cowardin classification system combined with a hydrogeomorphic (HGM) approach (Cowardin et al 1979, Brinson 1993) The HGM approach assesses the chemical, physical, and biological functions of wetlands based on their geomorphic setting, water source, and hydrodynamics HGM classes found in Colorado are mineral soil flats, organic soil flats, rivenne, lacustnne fringe, slope, and depressional The Cowardin classification uses a hierarchical structure of systems, subsystems, and classes to classify both wetlands and deepwater habitats Wetlands with persistent or nonpersistent vegetation are classified in the Cowardin system as palustnne, which typically includes wetlands referred to as marshes, fens, wet meadows, and sloughs The palustnme system also includes small, shallow, permanent, or intermittent water bodies such as ponds Palustnne wetlands may be situated shoreward of lakes and river channels, on river floodplains, in isolated catchments, or on slopes (Cowardin et al 1979) Under the palus`trine system, wetlands are classified as emergent (erect, rooted, herbaceous, and usually perennial hydrophytes that remain standing until at least the next growing season), scrub -shrub (woody vegetation less than 20 feet tall), or forested (woody vegetation 20 feet or taller) In wetlands where more than one wetland type occurs, the wetland type of the largest area is used For example, an area that is predominantly palustnne emergent (PEM) wetlands but also contains a small amount of palustrne scrub -shrub wetlands would be categorized as PEM wetlands Because of the limited occurrence of the smaller wetland types in the larger wetland polygons, these areas were not separated within the delineated polygons The Cowardin nvenne system includes wetlands and deepwater habitats contained within a channel, except wetlands dominated by trees, shrubs, and emergent vegetation The nvenne system usually contains flowing water and is bounded on the landward side by uplands, channel banks, or other wetlands Within the riverine system, wetlands are divided into the tidal, lower perennial (low gradient and slow water), upper perennial (high gradient and fast water), and intermittent subsystems Within these subsystems, nverine wetlands are further classified as unconsolidated bottom, aquatic bed, streambed, rocky shore, unconsolidated shore, and emergent wetland (nonpersistent) During the wetland delineation, ERO classified the wetlands as PEM, palustrne forested (PFO), and palustnne unconsolidated bottom (PUB) ERO Project #24-180 7 ER0 Resources Corporation Natural Resources Assessment P125 Gravel Mine - Southwest of State Highway 66 and County Road 17 Weld County, Colorado Jurisdictional Assessment To assist the Corps in making a preliminary jurisdictional determination, ERO reviewed the proximity and potential surface water connection of wetlands to known jurisdictional WOTUS using aerial photo interpretation and information from the wetland delineation. This information is accurate as of the date of this report and may change if further guidance documentation is issued. The project area is adjacent to St. Vrain Creek, an unnamed tributary to St. Vrain Creek, and the Last Chance Ditch. The Last Chance Ditch is an agricultural ditch that appears to have been excavated in uplands and would revert to uplands if irrigation flows were removed and, therefore, is an exempt feature. The Last Chance Ditch is likely nonjurisdictional. St. Vrain Creek is a known jurisdictional WOTUS. Description of Wetlands and Other Waters ERO conducted a wetland delineation of the project area during the 2024 site visit. Data were collected from various locations in the project area to document the characteristics of uplands, wetlands, and the transition areas between them. Each data point (DP) was given a label that corresponds to a location shown on Figure 2 and routine wetland determination data forms in Appendix B. ERO mapped approximately 2.7437 acres of wetlands in the project area during the 2024 site visit. Table 1 provides a summary of the mapped areas, including the Cowardin classification and HGM class for each wetland in the project area. No open waters or streams were identified in the project area during the 2024 site visit. Table 1. Wetland area, Cowardin classification, and HGM. Wetland ID1 Latitude Longitude Feature (acre) Size Classificationz Cowardin HGM W1 40.1994° -104.911° 0.0769 PEM Depressional W2 40.1987° -104.911° 0.0134 PEM Depressional W3 40.1971° -104.916° 0.1033 PEM Riverine W4 40.1973° -104.917° 0.3982 PFO/PUB Riverine W5 40.19547° -104.912° 2.1519 PEM Slope Wetland Tata/ 2.7437 1W = Wetland 2PEM = palustrine emergent, PFO = palustrine forested, PUB = palustrine unconsolidated bottom. Depressional Wetlands (W1 and W2) W1 and W2 are in the northeastern portion of the project area in depressional swales (Figure 2; Photo 4 and Photo 5). W1 and W2 are not identified in the NHD or on the NWI (USGS 2024; Service, n.d.). W1 and W2 have direct hydrological connections to the unnamed tributary to St. Vrain Creek. ERO believes these features would be considered jurisdictional. At DP1 and DP3, vegetation was dominated by Pennsylvania smartweed (Persicaria pensylvanica), common threesquare (Schoenoplectus pungens), and foxtail barley (Hordeum jubatum). Vegetation at DP1 and DP3met the rapid test for hydrophytic vegetation. At DP1 and DP3, the soils contained matrix colors of 10YR 3/1 and 10YR 2/1 with redoximorphic concentrations of 7.5YR3/3 and 5YR 3/4. The hydric ERO Project #24-180 8 ERO Resources Corporation Natural Resources Assessment P125 Gravel Mine - Southwest of State Highway 66 and County Road 17 Weld County, Colorado soil indicator redox dark surface was met at DP1 and DP3 Hydrology indicators met included surface water (DP1), a high water table (DP1), saturation (DP1), geomorphic position (DP1 and DP2), and a successful FAC-neutral test (DP1 and DP2) Uplands adjacent to W1 and W2 (DP2 and DP4) were dominated by plains cottonwood, western wheatgrass, prickly Russian<thistle (Salsola tragus), saltgrass (Distichhs spicata), and musk thistle (Carduus nutans) Indicators of hydrophytic vegetation were not met at DP2 and DP4 Soil samples were not taken at DP2 and DP4 due to the lack of indicators of hydrophytic vegetation and wetlands, therefore, hydric soils were assumed absent No primary or secondary hydrology indicators were observed at DP2 or DP4 Riverine Wetlands (W3 and W4) W3 and W4 are in the northwestern portion of the project area in depressional swales that appear to be oxbow channels of St Vrain Creek (Figure 2, Photo 6 and Photo 7) W3 and W4 are not identified on the NHD, however, W3 is identified as a palustnne unconsolidated bottom semipermanently flooded wetland and W4 is identified as a palustnne forested seasonally flooded wetland on the NWI maps (USGS 2024, Service, n d ) ERO believes these features would be considered junsdictional due to their continuous hydrological connections to St Vrain Creek At DP5, vegetation was dominated by curly dock (Rumex crispus) and met the dominance test for hydrophytic vegetation At DP5, the soils contained a matrix color of 10YR 3/2 with a redoximorphic concentration of 10YR 3/4 and met the hydnc soil indicator redox dark surface Hydrology indicators met at DP5 included surface soil cracks, geomorphic position, and a successful FAC-neutral test Due to the similarity between W3 and W4, a DP was not taken in W4 The only difference between the two wetlands is that W4 had a canopy dominated by peachleaf willow with an understory containing curly dock and smartweed (Photo 7) Hydric soils were assumed present based on the dominance of hydrophytic vegetation and presence of wetland hydrology (geomorphic position and a successful FAC neutral test) Uplands adjacent to W3 and W4 (DP6) were dominated by western wheatgrass, field bindweed (Convolvulus arvensis), and smooth brome (Bromus mermis) Indicators of hydrophytic vegetation were not met at DP6 A soil sample was not taken at DP6 due to the lack of indicators of hydrophytic vegetation and wetland hydrology No primary or secondary hydrology indicators were met at DP6 Slope Wetland (Wetland 5) W5 is a slope wetland in the center of the project area (Figure 2, Photo 8) W5 is not identified on the NHD, however, it is mapped as a palustnne emergent persistent temporarily flooded PEM1A on the NWI map (USGS 2024, Service, n d ) W5 has a continuous hydrological connection to the unnamed tributary to St Vrain Creek ERO believes this feature would be considered jurisdictional Vegetation in W5 (DP7) was dominated by foxtail barley, reed canarygrass (Phalar►s orundinacea), and fowl bluegrass (Poa palustrrs) and met the rapid test for hydrophytic vegetation At DP7, the soils contained a matrix color of 10YR 2/1 with a redoximorphic concentration of 7 5YR 3/4 and met the hydric soil indicator redox dark ERO Project #24-180 9 ERO Resources Corporation Natural Resources Assessment P125 Gravel Mine - Southwest of State Highway 66 and County Road 17 Weld County, Colorado surface Hydrology indicators met at DP7 included surface water, high water table, saturation, geomorphic position, and a successful FAC-neutral test Uplands adjacent to W5 (DP8) were dominated by western wheatgrass and did not meet any indicators of hydrophytic vegetation A soil sample was not taken at DP8 due to the lack of indicators of hydrophytic vegetation and wetland hydrology No pnmary or secondary hydrology indicators were met at DP8 Agricultural Ditches During the 2024 site visit, ERO observed 27 agricultural ditches (AgDitch) used to flood irrigate alfalfa fields in the southern half of project area with water from the Last Chance Ditch (AgDitchl through AgDitch27, Figure 2, Photo 1 and Photo 9) The agricultural ditches are actively maintained by farmers to divert water throughout the field The ditches range from 219 to 1,663 feet long, are approximately 3 feet wide, and range from dry to saturated to wet When irrigation flows recede, AgDitchl through AgDitch12 return water into the Last Chance Ditch Depending on the quantities of water, AgDitch13 through AgDitch26 run northwest into W5 and flow into the unnamed tributary to St Vrain Creek If irrigation flows are lower, AgDitch 13 through AgDitch26 flow drain into AgDitch27, which returns flows to a lateral of Last Chance Ditch and then into Last Chance Ditch Agncultural ditches are typically exempt from Section 404 permitting because they do not carry a relatively permanent flow of water and are excavated wholly in and draining only dry land ERO believes AgDitch 1 through AgDitch27 are likely nonjunsdictional Recommendations ERO recommends requesting a jurisdictional determination of W1, W2, W3, W4, and W5 if work is planned in these areas If W1 through W5 are considered jurisdictional and work is planned in these areas, a Section 404 Permit would be required for the placement of dredged or fill material in the wetlands lithe wetlands are determined nonjunsdictional, or if no work is planned in these areas, no action would be necessary Additionally, ERO recommends requesting a jurisdictional determination of AgDitchl through AgDitch27 if work is planned in these areas If the AgDitches are considered jurisdictional and work is planned in any of them, a Section 404 Permit would be required for the placement of dredged or fill material below the OHWM If the AgDitches are determined nonjunsdictional, or if no work is planned in these areas, no action would be necessary Threatened, Endangered, and Candidate Species ERO assessed the project area for habitat for T&E species under the Endangered Species Act (ESA) Federally listed T&E species are protected under the ESA of 1973, as amended (16 United States Code [U S C ] 1531 et seq ) Significant adverse effects on a federally listed species or its habitat require consultation with the U S Fish and Wildlife Service (Service) under Section 7 or 10 of the ESA The_ ERO Proiect #24-180 10 ERO Resources Corporation Natural Resources Assessment P125 Gravel Mine - Southwest of State Highway 66 and County Road 17 Weld County, Colorado Service's Information for Planning and Consultation (IPaC) resource list identifies several T&E species in the project area (Table 2). e 2. iPaC resource list for the project area. Scientific Name Status* Habitat Habitat Potential Present Affected Project? to or be by Common Name Mammals _ Preble's mouse meadow jumping Zapus hudsonius preblei T Shrub riparian/wet meadows No habitat Birds Eastern black rail Laterallus jamaicensis T Shallow wet cover drainage Colorado River sedge in in cattail the in east meadows Arkansas southeastern and -central the wetlands Republican with River Colorado and dense Yes Piping plover* Charadrius melodus T Sandy river lakeshore sandbars beaches and No habitat depletions anticipated and no Whooping crane' Grus americana E Mudflats in agricultural around areas reservoirs and No habitat depletions anticipated and no Fish Pallid sturgeon" ScaphirhynchliS albus E Large, with or a sandy turbid, strong substrate free -flowing current and rivers gravel No habitat depletions anticipated and no Invertebrates Monarch butterfly Danaus plexippus C Dependent (Asclepiadoideae) and a summer forage on on resident milkweeds blooming as host plants flowers; No habitat Plants Ute ladies' -tresses orchid Spiranthes diluvialis T lakes Moist floodplains streams, elevation to below wet of and 7,800 alluvial perennial around feet meadows, springs in and No habitat Western orchid'* prairie fringed Platanthera praeclara T Moist meadows to wet prairies and No habitat depletions anticipated and no *T = Federally Threatened Species, E = Federally Endangered Species, C = Candidate for Federal Listing. "Water depletions in the South Platte River may affect the species and/or critical habitat in downstream reaches in other counties or states. Source: Service 2024. Species Eliminated from Further Consideration The proposed project would not directly affect Preble's meadow jumping mouse, monarch butterfly, or Ute ladies' -tresses orchid due to the lack of suitable habitat in the project area. The piping plover, whooping crane, pallid sturgeon, and western prairie fringed orchid are species that are affected by depletions to the Platte River system. Based on ERO's knowledge of the types of activities likely to be implemented as part of the development of the project area, there would be no depletions to the South ERO Project #24-180 11 ERO Resources Corporation Natural Resources Assessment P125 Gravel Mine - Southwest of State Highway 66 and County Road 17 Weld County, Colorado ' Platte River If the project includes activities that deplete water in the South Platte River, such as diverting water from a stream or developing new water supplies, these species could be affected by the project and consultation with the Service may be required Threatened and Endangered Species Habitat Eastern Black Rail Species Background The eastern black rail was listed as a threatened species on October 8, 2020 under the ESA (see Federal Register Vol 85, No 196 63764-63803) by the Service The eastern black rail ranges throughout central and eastern North America and south through the Caribbean and Brazil This species has been documented along the Arkansas River drainage in southeastern Colorado and the Republican River in east -central Colorado Threats include habitat fragmentation and conversion resulting in the loss of wetland habitats, sea level rise and tidal flooding, land management practices (e g, incompatible fire management practices, grazing, and haying/mowing and other mechanical treatment activities), and increasing storm intensity and frequency There are no exact counts of eastern black rail populations at the present time, therefore, analysis units based on habitat have been identified across the United States Colorado is included in the Great Plains analysis unit (Service 2019) The eastern black rail is dependent on wetland and marsh habitat that contains a mix of wet, saturated, and some dry edges around the periphery The subspecies requires dense overhead cover and sods that are moist to saturated (occasionally dry) and interspersed with or adjacent to very shallow water (Service 2019) In Colorado, the eastern black rail has been documented in cattail/bulrush marshes and near pond edges Along the Republican River in northeastern Colorado and western Kansas, the species has been documented in riparian habitat (U S Air Force Academy 2020) Swtable Habitat and Effects The project area contains herbaceous PEM wetland habitat (W5) east of St Vrain Creek that would be considered suitable for the eastern black rail However, the Service currently only considers the Arkansas River drainage part of the breeding range for eastern black rails and does not consider the South Platte River drainage within the black rail's breeding range (Beane and Salamack 2021) Based on current knowledge of the black rail's distribution, there would be no effects on the species, and no further action is necessary Recommendations Should new information become available that expands the known breeding range of the eastern black rail, future consultation with the Service may be required ERO Project #24-180 12 ERO Resources Corporation Natural Resources Assessment P125 Gravel Mine -Southwest of State Highway 66 and County Road 17 Weld County, Colorado Other Species and Habitats of C # ncern Baack-Tamed Prairie Dog Species Background The black -tailed prairie dog is a Colorado species of special concern (CPW 2021a) Black -tailed prairie dogs are important components of the short and mesic grasslands systems Threats to this species include habitat loss and degradation, habitat fragmentation, disease (sylvatic plague), and lethal control activities Typically, areas occupied by prairie dogs have greater cover and abundance of perennial grasses and annual forbs compared with unoccupied sites (Whacker and Detling 1988, Witmer et al 2000) Black -tailed prairie dogs are commonly considered a "keystone" species because their activities (burrowing and intense grazing) provide food and shelter for many other grassland species and have a large effect on community structure and ecosystem function (Power et al 1996) Prairie dogs can contribute to overall landscape heterogeneity, affect nutrient cycling, and provide nest sites and shelter for wildlife (Whacker and Detling 1988) Species such as black -footed ferret (Mustela nignpes), burrowing owl (Athene cunrculana), prairie rattlesnake (Crotalus vinchs), and mountain plover (Charadnus montanus) are closely linked to prairie dog burrow systems for food and cover Prairie dogs - also provide an important prey resource for numerous predators including American badger (Toxic/ea taxus), coyote (Canis latrans), red fox (Vulpes vulpes), bald eagle (Naliaeetus leucocephalus), golden - eagle (Aquila chrysaetos), ferruginous hawk (Buteo regales), and other raptors Prairie dogs also can denude the surface by clipping aboveground vegetation and contributing to exposed bare ground by digging up roots (Kuford 1958, Smith 1967) Suitable Habitat and Effects ERO observed active black -tailed prairie dog burrows in the northern portion of the project area during the 2024 site visit (Figure 2, Photo 3) Although prairie dogs are not protected under the ESA, CPW recommends attempting to remove or exterminate prairie dogs prior to bulldozing an active prairie dog town fo'r humane reasons Weld County does not have any regulations or policies pertaining to prairie dogs and CPW protocol should be followed Recommendations If prairie dogs must be removed for any proposed activities, two options typically exist relocation and extermination Currently, relocation to other parts of Colorado is not an option due to limited resources for new populations and CPW requires permits to move praise dogs Private companies can be hired to relocate praine dogs, although relocation sites are difficult to secure If extermination of prairie dogs is the only option, several independent companies provide treatments for prairie dog control Prior to any work that would disturb a colony from March 15 through October 31, colonies should be surveyed for western burrowing owls CPW recommends attempting to remove or exterminate prairie dogs pnor to bulldozing an active prairie dog town for humane reasons ERO Project #24-180 13 ERO Resources Corporation Natural Resources Assessment P125 Gravel Mine - Southwest of State Highway 66 and County Road 17 Weld County, Colorado Western Burrowing Ow8 Species Background The western burrowing owl (burrowing owl) is a small migrant owl listed by the state of Colorado as a threatened species and is federally protected under the Migratory Bird Treaty Act (MBTA). Primary threats to the burrowing owl include habitat loss and fragmentation, anthropogenic sources of mortality such as vehicular collisions, and loss of wintering grounds, largely in Mexico (McDonald, Korfanta, and Lantz 2004) In general, burrowing owls are found in grasslands with vegetation less than 4 inches high and a relatively large proportion of bare ground (Gilhhan and Hutchings 2000) In Colorado, burrowing owls are usually associated with black -tailed prairie dog colonies (Andrews and Righter 1992) More than 70 percent of sightings reported in Colorado Breeding Bird Atlases were in prairie dog colonies (Colorado Bird Atlas Partnership 2016) Burrowing owls usually arrive on their breeding grounds around mid -March to early Apnl and remain until September (Haug and Oliphant 1990) Burrowing owls are typically present in Colorado from March 15 through October 31, with breeding from mid -April through early/mid-August (Andrews and Righter 1992, Colorado Bird Atlas Partnership 2016) CPW suggests conducting burrowing owl clearance surveys in prairie dog towns that are subject to poisoning or construction projects dunng the period from March 15 through October 31 (CPW 2020) Suitable Habitat and Effects The praise dog burrows in and adjacent to the project area are suitable habitat for burrowing owls Inadvertent killing of burrowing owls could occur dunng prairie dog poisoning, construction, or other earthmoving projects during the breeding period, as well as up to a month before egg laying and several months after young have fledged CPW has a recommended bufferof 660 feet (0 125 mile) surrounding active burrowing owl nests during the nesting season (March 15 through August 31) (CPW 2020) Burrowing owls could be impacted by the project if work would occur within CPW's recommended 660 - foot buffer of any active burrows Recommendations A burrowing owl survey should be conducted if work would occur within the recommended buffer of any burrow from March 15 through October 31 Additionally, CPW recommends conducting burrowing owl clearance surveys in prairie dog towns that are subject to poisoning or construction projects during this period (March 15 through October 31) (CPW 2020) If owls are present within 660 feet of the project area, activities should be restncted until the owls have migrated from the site, which can be determined through monitoring The prairie dog colony that is separated from the project area by St Vrain Creek and its riparian corridor may have enough visual separation from the project area for burrowing owl surveys to not be required at this location even though these burrows are within 660 feet of the project area Construction occurring from November 1 through March 14 would not require clearance surveys ERO Project #24-180 14 ERO Resources Corporation Natural Resources Assessment P125 Gravel Mine - Southwest of State Highway 66 and County Road 17 Weld County, Colorado Raptors and Migratory Birds Migratory birds, as well as their eggs and nests, are protected under the MBTA The MBTA does not contain any prohibition that applies to the destruction of a bird nest alone (without birds or eggs), provided that no possession occurs tlunng the destruction While destruction of a nest by itself is not prohibited under the MBTA, nest destruction that results in the unpermitted take of migratory birds or their eggs is illegal and fully prosecutable under the MBTA (Service 2003) The regulatory definition of a take means to pursue, hunt, shoot, wound, kill, trap, capture, or collect, or attempt to pursue, hunt, shoot, wound, kill, trap, capture, or collect (50 CFR 10 12) Under the MBTA, the Service may issue nest depredation permits, which allow a permittee to remove an active nest The Service, however, issues few permits and only under specific circumstances, usually related to damage to agricultural crops/livestock, private property, and protection of human health and safety Obtaining a nest depredation permit is unlikely and involves a process that takes, at a minimum, 8 to 12 weeks The best way to avoid a violation of the MBTA is to remove vegetation outside of the active breeding season, which typically falls between March and August, depending on the species MBTA enforcement actions are typically the result of a concerned member of the community reporting a violation CPW maintains a leadership role with respect to raptor management in Colorado, however, the primary authority for the regulation of take and the ultimate jurisdiction for most of these species rests with Service under the MBTA and the Bald and Golden Eagle Protection Act (16 U S C 668-668c) Suitable Habitat and Effects A wide variety of bird species use different habitat types in the project area for shelter, breeding, wintering, and foraging at various times during the year Riparian vegetation, wetlands, and upland grasslands in and adjacent to the project area are potential nesting habitat for migratory birds ERO passively surveyed the project area for nests during the 2024 site visit Depending on the species, CPW recommends a 0 33- or 0 25 -mile buffer from active raptor nests from February through July for human encroachment activities or installation of a permanent or long-standing physical object or structure (CPW 2020) The breeding season for most birds in Colorado is March through mid -September, with the exception of a few species that begin breeding in February, such as great -horned owls (Bubo virgunanus) Recommendations Although no nests were observed during the 2024 site visit, ground -nesting bird and arboreal nests are difficult to detect and may be present in the grasslands and dense trees on the perimeter of the project area To avoid destruction of potential migratory bird nests, vegetation removal should be conducted outside of the April 1 through September 15 breeding season or within a week of a nest clearance survey being conducted ERO Project #24-180 15 ERO Resources Corporation Natural Resources Assessment P125 Gravel Mine - Southwest of State Highway 66 and County Road 17 Weld County, Colorado Both the Eastern Colorado Field Office of the Service and the Colorado Department of Transportation have identified the primary nesting season for migratory birds in eastern Colorado as occurring from April 1 through August 31 (Service 2022, Colorado Department of Transportation 2011) However, a few species such as bald eagles, great horned owls, and red-tailed hawks (Bute° jamaicensis) can nest as early as December (eagles) or late February (owls and red-tailed hawks) Because of variability in the breeding seasons, ERO recommends that a nest survey be conducted within one week prior to construction to determine if any active nests are present in the project area so that they can be avoided Additional nest surveys during the nesting season may also be warranted to identify active nesting species that may present additional development timing restrictions (e g, eagles or red-tailed hawks) If active nests are identified in or near the project area, activities that would directly affect the nests should be restricted Habitat -disturbing activities (e g, tree removal, grading, scraping, and grubbing) should be conducted during the nonbreeding season to avoid disturbing active nests, or to avoid a "take" of the migratory bird nests in the project area Nests can be removed during the September 1 through March 31 nonbreeding season to preclude future nesting and avoid violations of the MBTA There is no process for removing nests during the nonbreeding season, however, nests may not be collected under MBTA regulations If the construction schedule does not allow vegetation removal outside of the breeding season, a nest survey should be conducted immediately prior to vegetation removal to determine if the nests are active and by which species If active nests are found, any work that would destroy the nests or cause the birds to abandon young in the nest could not be conducted until the birds have vacated the nests CPW recommends consultation with local CPW staff early in the planning phase of project proposals to assess and develop site -specific recommendations based on preexisting conditions (e g, existing development, topography, vegetation, and line -of -sight to nest) Bald Eagle Species Background The Bald Eagle Protection Act (Eagle Act) was originally passed In 1940 In 1962, the Eagle Act was amended to include the golden eagle (Bald and Golden Eagle Protection Act - BGEPA) The BGEPA prohibits anyone, without a permit issued by the Secretary of the Interior, from "taking" bald eagles, including their parts, nests, or eggs The BGEPA defines "take" as "pursue, shoot, shoot at, poison, wound, kill, capture, trap, collect, molest, or disturb " The BGEPA affords eagles additional protections beyond those provided by the MBTA by making it unlawful to "disturb" eagles In 2016, "disturb" under the BGEPA was defined to mean to "agitate or bother a bald or golden eagle to a degree that causes or is likely to cause, based on the best scientific information, (1) injury to an eagle, (2) a decrease in its productivity, by substantially interfering with normal breeding, feeding, or sheltering behavior, or (3) nest abandonment, by substantially interfering with normal breeding, feeding, or sheltering behavior" Removing nests, destroying nests, or causing nest abandonment may constitute a violation of the MBTA and the BGEPA The BGEPA authorizes the Service to issue eagle incidental take permits only when the ERO Project i#24-180 16 ERO Resources Corporation Natural Resources Assessment P125 Gravel Mine - Southwest of State Highway 66 and County Road 17 Weld County, Colorado take is "compatible with the preservation of bald eagles or golden eagles " In December 2016, the Service published a final rule,regarding Eagle Take Permits, outlining revisions to regulations for eagle incidental take and take of eagle nests (Service 2016a) The permitting process provides limited exceptions to the BGEPA's prohibitions, and the Service has issued regulations concerning the permit procedures in 50 CFR 22 The bald eagle is a large North American bird with a historical distribution throughout most of the U S Most bald eagle nesting in Colorado occurs near lakes or reservoirs or along rivers Typical bald eagle nesting habitat consists of forests or wooded areas that contain tall, aged, dying, and dead trees (Martell 1992) Bald eagles seek aquatic habitat for foraging and typically prefer fish, although they also feed on birds, mammals, and carrion, particularly in winter (Buehler 2000, Sharps and Uresk 1990) Prairie dogs provide a major food resource for bald eagles wintering along the Colorado Front Range (Environmental Science and Engineering 1988) Suitable (Habitat and Effects A bald eagle nest is located approximately 011 mile northeast of the northern project area boundary and could be impacted by the project if a physical object or structure (I e , surface occupancy) is proposed within the CPW-recommended 0 25 -mile radius of active nests permanently or for a significant amount of time or if there would be human encroachment activities within a 0 5 -mile radius of an active nest from December 1 through July 31 (CPW 2020) The nest is located on the south bank of St Vram Creek During the 2024 site visit, this nest was not observed due to tree leaf out CPW recommends seasonal restrictions beyond July 31 if chicks are still present in the nest Additionally, the project area overlaps a bald eagle winter concentration and winter forage area (CNHP 2024) The recommendations for active nests are more restrictive and supersede recommendations for winter concentration and winter forage areas Recommendations For any work conducted within a 0 25 -mile radius of the bald eagle nest, ERO recommends -contacting the Service and developing a bald eagle mitigation plan to comply with the BGEPA, MBTA, and 2016 Service Eagle Permit Rules as applicable (Service 2016b) Additionally, CPW recommends consultation with local CPW staff early In the planning phase of project proposals to assess and develop site -specific recommendations based on preexisting conditions (e g , existing development, topography, vegetation, and line -of -sight to nest) High Priority Habitats and [,ug Game ERO reviewed data from CPW map databases and determined that two high priority habitat (HPH) areas overlap the project area, which include Aquatic Native Species Conservation Waters and Mule Deer Migration Corridors and Severe Winter Range (CPW 2021b, Figure 3) These species are discussed in more detail below ERO Project #24-180 17 ERO Resources Corporation 2 l? P125 Gravel Mine, Weld County Project Area Bald Eagle Active Nest Site 1 Bald Eagle Active Nest Site Buffer Aquatic Native Species Conservation Waters a% Figure 3 Mule Deer Migration Corridor High Priority Habitat Mule Deer Winter Concentration Area Mule Deer Severe Winter Range Gotin . Ro28 0 250 500 feet N A Prepared for: Raptor Materials File: 24_180 Figure 3.mzd [dlHj September 20, 2024 ERO ERO Resources Corp. Esri, HERE, Garmin, (c) OpenStreetMap contributors Source: Esri, Maxar, Earthstar Geographies, and the GIS User Community Natural Resources Assessment P125 Gravel Mine - Southwest of State Highway 66 and County Road 17 Weld County, Colorado Aquatic Native Species Conservation Waters Species Background Aquatic native species are found throughout Colorado, wherever water resources are present They are typically sensitive to changes in water quality factors -such as temperature, dissolved oxygen, and turbidity The health of a water resource can often be evaluated based on the presence or absence of certain aquatic species A major threat to the aquatic native resources in Colorado is urban development, which leads to consumptive water use and dams, as well as aquatic nuisance species, which often outcompete native species for resources (CPW, n d -b) Suitable Habitat and Effects In the project area, St Vrain Creek coincides with the Aquatic Native Species Conservation Waters HPH (CPW 2021b) The presence of water moving through St Vrain Creek provides suitable habitat for native species Recommendations As currently designed, the project area is located outside of the limits of St Vrain Creek Best Management Practices should be used during construction to discourage any sedimentation or construction runoff from entering St Vrain Creek Any impacts on the project area wetlands would likely required a Section 404 Permit, which may require a combination of restoration and mitigation of permanent impacts Restoration or mitigation could provide resiliency to the Aquatic Native Species Conservation Waters HPH area Mule Deer Species Background Mule deer are found in all ecosystems in Colorado from grasslands to alpine tundra Spring and summer ranges are typically mosaics of meadows, aspen woodlands, alpine tundra-subalpine forest edges, or montane forest edges (Fitzgerald 1994) Seasonally, mule deer are relatively sedentary, although most will spend the summer at higher elevations and migrate to lower elevations in the winter Mule deer diets vary seasonally but generally consist of browsing trees and shrubs, forbs, and grasses Suitable Habitat and Effects As discussed above, the project area overlaps Mule Deer Migration Corridors and Severe Winter Range, which is designated as HPH (CPW 2021b) Although no mule deer were observed during the 2024 site visit, it is likely that mule deer forage and migrate through the project area during all seasons Mule deer could be temporarily displaced from the project area during construction Recommendations For any work conducted within Mule Deer Migration Corridors and Severe Winter Range, CPW recommends no permitted or authorized human activities be conducted from December 1 to April 30, however, some development may be allowable while protecting the identified resource values with special constraints (CPW 2021b) ERO recommends contacting the local CPW district manager early in ERO Project #24-180 19 ERO Resources Corporation Natural Resources Assessment P125 Gravel Mine -Southwest of State Highway 66 and County Road 17 Weld County, Colorado the planning phase of project proposals to assess and develop site -specific recommendations based on preexisting conditions Other Wildlife The project area provides habitat for a variety of small mammals such as cottontail rabbits (Sylvilagus sp ), deer mice (Peromyscus sp ), voles (Microtus sp ), and pocket gophers (Geomyidea sp ) Additionally, the on -site wetlands and the nearby riparian corridors of St Vrain Creek and the unnamed tributary to St Vrain Creek provide foraging, sheltering, and dispersal habitat components for numerous species Carnivores such as coyote (Canis latrans), raccoon (Procyon lotor), red fox, grey fox (Urocyon cinereoargenteus), and striped skunk (Mephitis mephitis) are also likely to occur in the project area These species are typically observed in open grasslands and close to riparian corridors None of these species were observed during the 2024 site visit As with any human development, wildlife species sensitive to human disturbance are likely to decline in abundance or abandon the area, while other wildlife species adapted to development are likely to increase in abundance Species likely to increase include red fox, raccoon, and great horned owl Overall, surrounding and continuing development contributes to a decline in the number and diversity of wildlife species nearby and to a change in species composition to favor species that adapt better to human disturbance References Ackerfield, Jennifer 2015 Flora of Colorado First Edition Fort Worth, Texas Botanical Research Institute of Texas Andrews, R , and R Righter 1992 Colorado Birds A Reference to Their Distribution and Habitat Denver, Colorado Denver Museum of Nature & Science Press Beane, R D , and Kristin Salamack 2021 "Personal Communication between Ron Beane (ERO) and Kristin Salamack (Colorado Department of Transportation / U S Fish and Wildlife Service Liaison) " Brinson, Mark M 1993 "A Hydrogeomorphic Classification of Wetlands " Wetlands Research Program Technical Report WRP-DE-4 Vicksburg, Mississippi Army Engineers Waterways Experiment Station Buehler, D A 2000 "Bald Eagle (Haliaeetus Leucocephalus), Version 2 0 " In The Birds of North America Cornell Lab of Ornithology, Ithaca, New York, USA https //doi org/10 2173/bna 506 Colorado Bird Atlas Partnership 2016 The Second Colorado Breeding Bird Atlas Denver, CO https i//cobreedingbirdatlasii org/ Colorado Department of Transportation 2011 "Section 240, Protection of Migratory Birds " https //www codot gov/programs/environmental/wildlife/guidelines/BirdspecCDOTbio pdf/vie w Colorado Natural Heritage Program 2024 "Colorado's Conservation Data Explorer (CODEX) " https //codex cnhp colostate edu/ ERO Project #24-180 20 ER0 Resources Corporation Natural Resources Assessment P125 Gravel Mine - Southwest of State Highway 66 and County Road 17 Weld County, Colorado Colorado Parks and Wildlife 2020 "Recommended Buffer Zones and Seasonal Restrictions for Colorado Raptors" https //cpw state co us/Documents/WildlifeSpecies/LivingWithWildlife/Raptor-Buffer- Guidelines pdf --- 2021a "Black -Tailed Prairie Dog" 2021 --- 2021b "CPW Recommendations to Avoid and Minimize Impacts to Wildlife from Land Use Development in Colorado " --- n d -a "Google Earth (KMZ) Species Maps " Accessed May 15, 2023 https //cpw state co us/learn/Pages/KMZ-Maps aspx --- n d -b "Habitats in Colorado - Aquatic Habitats " Accessed September 17, 2024 https //cpw state co us/conserving-and-researching-wildlife-habitats#4257225834-2121360582 Cowardin, Lewis M , Virginia Carter, Francis C Golet, and Edward T LaRoe 1979 "Classification of Wetlands and Deepwater Habitats of the United States " FWS/OBS-79/31 Washington, D C Department of the Interior, U S Fish and Wildlife Service, Office of Biological Services Program Environmental Laboratory 1987 "Corps of Engineers Wetlands Delineation Manual " Wetlands Research Program Technical Report Y-87-1 Vicksburg, Mississippi U S Army Engineer Waterways Experiment Station https //www Irh usace army mil/Portals/38/docs/USACE%2087%20Wetland%20Delineation%20 Manual pdf Environmental Science and Engineering 1988 "Bald Eagle Study Winters 1986-1987,1987-1988 Final Report " Prepared for the Office of the Program Manager, Rocky Mountain Arsenal Contamination Cleanup Fitzgerald, J P 1994 Mammals of Colorado University Press of Colorado Gillihan, Scott W , and Scott W Hutchings 2000 "Best Management Practices for Shortgrass Praine Birds A Landowner's Guide " Brighton, Colorado Colorado Bird Observatory http //www rmbo org/pubs/downloads/bmp pdf Google, Inc 2024 "Google Earth Pro " Online database Google Earth Pro 2024 https //earth google com/web Haug, Elizabeth A , and Lynn W Oliphant 1990 "Movements, Activity Patterns, and Habitat Use of Burrowing Owls in Saskatchewan " The Journal of Wildlife Management 54 (1) 27-35 https //doi org/10 2307/3808896 Kuford, Carl B 1958 "Prairie Dogs, Whitefaces, and Blue Grama " Wildlife Monographs, no 3,3-78 Martell, M 1992 "Bald Eagle Winter Management Guidelines " U S Fish and Wildlife 21 Service McDonald, David, Nicole M Korfanta, and Sarah J Lantz 2004 "The Burrowing Owl (Athene Cunicularia) A Technical Conservation Assessment " Preparedfor the USDA Forest Service, Rocky Mountain Region, Species Conservation Project http //a123 g akamai net/7/123/11558/abc123/forestservic download akamai com/11558/ww w/nepa/91137_FSPLT3_2553024 pdf Natural Diversity Information Source 2021 "Natural Diversity Information Source " Colorado Parks and Wildlife Colorado Hunting Atlas 2021 https //ndismaps nrel colostate edu/index htmPapp=HuntingAtlas Power, Mary E , David Taman, James A Estes, Bruce A Menge, William J Bond, L Scott Mills, Gretchen Daily, Juan Carlos Castilla, Jane Lubchenco, and Robert T Paine 1996 "Challenges in the Quest for Keystone Species " BioScience 46 (8) 609-20 https //doi org/10 2307/1312990 Sharps, Jon C , and Daniel W Uresk 1990 "Ecological Review of Black -Tailed Prairie Dogs and Associated Species in Western South Dakota " The Great Basin Naturalist 50 (4) 339-45 Smith, Ronald E 1967 Natural History of the Prairie Dog m Kansas Lawrence, Kansas Museum of Natural History, University of Kansas ERO Project #24-180 21 ERO Resources Corporation Natural Resources Assessment P125 Gravel Mine - Southwest of State Highway 66 and County Road 17 Weld County, Colorado U S Air Force Academy 2020 "Personal Communication between Brian Mihlbachler (USAFA) and April Estep " U S Army Corps of Engineers 2010 "Regional Supplement to the Corps of Engineers Wetland Delineation Manual Great Plains Region (Version 2 0) " Vicksburg, Mississippi https-//usace contentdm`ocic org/utils/getfile/collection/p266001coll1M/7613 - -- 2020 "National Wetland Plant List, Great Plains " U S Department of Agriculture, Natural Resources Conservation Service 2006 "Land Resource Regions and Major Land Resource Areas of the United States, the Caribbean, and the Pacific Basin " Agriculture Handbook 296 Washington, DC US Department of Agriculture - -- 2024 "PLANTS Database " Database PLANTS Database 2024 https //plants sc egov usda gov/home U S Fish and Wildlife Service 2003 "Migratory Bird Permit Memorandum " https //www fws gov/media/mbpm-l-migratory-bird-permit-mbp-memorandum-series --- 2016a "Eagle Permits, Revisions to Regulations for Eagle Incidental Take and Take of Eagle Nests " Federal Register --- 2016b "Programmatic Environmental Impact Statement for the Eagle Rule Revision " https //www fws gov/migratorybirds/pdf/management/Signed-ROD-eagles pdf - -- 2019 "Species Status Assessment Report for the Eastern Black Rail (Laterallus Jamaicensis Jamaicensis) Version 1 3 " Southeast Region, Atlanta, GA - -- 2022 "Personal Communication between Kristin Salamack (U S Fish and Wildlife Service) and ERO Resources Corporation Regarding Nesting Season of Migratory Birds " --- 2024 "Information for Planning and Consultation (IPaC) Resource List" 2024 https //ecos fws gov/ipac/ --- n d "National Wetlands Inventory Online Database " FWS Gov https //www fws gov/wetlands/index html U S Geological Survey 2022 "Gowanda, CO " - -- 2024 "National Hydrography Dataset " U S Department of the Interior, U S Geological Survey https //apps nationalmap gov/viewer/ Whicker, April, and James Detling 1988 "Ecological Consequences of Prairie Dog Disturbances " B►oScience 38 (December) Witmer, Gary, Kurt VerCauteren, Karen Manci, and Donna Dees 2000 "Urban -Suburban Prairie Dog Management Opportunities and Challenges " https //doi org/10 5070/V419110183 ERO Project #24-180 22 ERO Resources Corporation Natural Resources Assessment P125 Gravel Mine - Southwest of State Highway 66 and County Road 17 Weld County, Colorado Appendix A Photo Log ERO Protect #24-180 ERO Resources Corporation PHOTO LOG NATURAL RESOURCES ASSESSMENT P125 GRAVEL MINE, WELD COUNTY, COLORADO JULY 11 AND JULY 12, 2024 Photo 1 - Overview of a flat agricultural field containing irrigation ditches dominated by alfalfa in the southern portion of the project area. View is southeast. !�+,f •i t: C� \�. ..I - '7!� 1•.f A C. -‘t: a. Il • .C• .'-'T•'Fs '� ,W •«♦ . • %as es •,, i-•I •�c.� ' a • } J C,''} 4,. ij' -„>•`• •.,i ri •• •40 1.`, 1� --Y r.;„),or, . • • .....:1-% it: �4-:- • .. . • rJ IY�`r`si• • , I r ,'� , • '1' �Y r`. i r r ' . \ va,: _1 • 'T • - - 'L►} . . ... , . : • ^ I M 1 \ it \.! I.• L.I' • 1' • 1l 2,..•� if _• �. r' 9k • = .{Y 1_ ti ..r 1 ` ,.,' ♦t�r1 >`..• L e ♦if �• ` -, .� `=.♦ i 't. �.r"•aM/♦...".- _ -,r .�. �• 5 `r "•' V ' \ ••� ��'y♦^4 w•'{ 'Y`' ' _ �.-.4% C 'I -I .• , - .� • -.. - ! \. ` Imo. r./ •� , •y - d ' ` \ .• , • .` �- 4� �1�*, 1•��; 1L • e�w-.� iv.�♦'•� y.j �1' f' F li ��'_. f•/'. r •t 't.• •'� lir- .� •f, .��A - _;1 .j \ . • l/ 1 II , Vow _filly .. 4. . '�+ly_t[�lr •ti •.1} • J}.1 •' _ •: 1 \' }k►%►. '.t ".• -sf - 1 . 'ti' r.., '1 ..... _ r J� Ir �r - •`�. • M •.y .1i • _• t••- .�1.•}". i f� � I r_ i `•y 4•" , 1 • n 1 -• .' •S' -1, I t( t r ♦ •, -Ir. '• .i . �+ '. ` a 1 _ �' • •� . F ' �^ �'. I • j' •- • • ' I. • i . \� * �• - \t.�.'- J. - • _.`. `• Iti. a �'`• �t (�' L� i • t. .f "•l• y A 1•� ' Jr , 1 _ .' . ♦, t1`s % , •• s • t. L- 1 '• r4 �. ,.l� ' •`• 4 . .r , . \_. r• `.1''�1 1 \� 1 w` � �� rf I -.. \ .{ I \� e .—'`•l" _1•_.ite� �� • Photo 2 - Overview of vegetation in the central portion of the project area. View is northeast. PHOTO LOG NATURAL RESOURCES ASSESSMENT P125 GRAVEL MINE, WELD COUNTY, COLORADO JULY 11 AND JULY 12, 2024 S v ``-_,r�i 1"•r•�k•':l �_' '.... .J .� r, �. . ` a •• , ':fir. _ 11. .."► d _.lL�f ��` �1-rth:^. .e. _ J •.{' L 1, !. < ��t ^� k. - r J • �++' 417 ,r k i- t I •vj r:::"..... -.....::o a r t • • ♦ - :,",.. .7,- : 1Y `VTTr��1�. • } • _ •� .- J• 4!'>o Fr k. �. �. .� r Photo 3 - Overview of active prairie dog colonies in the northern portion of the project area in the organic dairy cattle pasture. View is north. • Y t t rlt*! btft. li(. Si. . , It t ••' ,, 4� a lAt 4,`S `1 ,.) t;#,:.....' 1Y,. 1I �.'Y'z i wI ,i �. J. �- •, 1. �• .air t ,<. lilt PHOTO LOG NATURAL RESOURCES /ASSESSMENT P125 GRAVEL MINE, WELD COUNTY, COLORADO JULY 11 AND JULY 12, 2024 PHOTO LOG NATURAL RESOURCES ASSESSMENT P125 GRAVEL MINE, WELD COUNTY, COLORADO JULY 11 AND JULY 12, 2024 PHOTO LOG NATURAL RESOURCES ASSESSMENT P125 GRAVEL MINE, WELD COUNTY, COLORADO JULY 11 AND JULY 12, 2024 Photo 9 - A total of 27 irrigation ditches (AgDitch) were identified in the project area. View is southeast. , , - .. '1 , LN7 4 : - _ � .. .' ns -1--••• ^. • . `�.�_ am.,_ J _ --1.4.- Natural Resources Assessment P125 Gravel Mine - Southwest of State Highway 66 and County Road 17 Weld County, Colorado Appendix B Routine Wetland Determination Data Forms / ERO Project #24-180 ERO Resources Corporation WETLAND DETERMINATliON DATA FORM — Great Plains Region Project/Site P125 Gravel Mme Applicant/Owner Raptor Materials Investigator(s) Mane Russo & Ashlee Caruana Section, Township, Range Section 29, T3N, R67W, 6th PM City/County Weld County Sampling Date 7/12/2024 State CO Sampling Point DP1 Landform (hdlslope, terrace, etc ) Swale Subregion (LRR) Western Great Plains Range & Irrigated Region Lat 40 199385 Long 104 910828 Datum NAD83 Soil Map Unit Name , Aquolls and Aquents, gravelly substratum NWI Classification None Are climate/hydrologic conditions on the site typical for this time of year? ® Yes ❑ No (If no, explain in Remarks) Vegetation Sod Hydrology Are "Normal Circumstances" present? Yes ❑ No Significantly Disturbed? ❑ ❑ ❑ Naturally Problematic? ❑ ❑ ❑ (If needed, explain any answers in Remarks) SUMMARY OF FINDINGS — Attach site map showing sampling point locations, transects, important features, etc Local relief (concave, convex, none) Concave Slope (%) 0 % Hydrophybc Vegetation Present? Hydnc Soil Present? Wetland Hydrology Present? Is the Sampled Area within a Wetland? Yes No ® ❑ N ❑ .1 ❑ Remarks Wetland data point VEGETATION — Use scientific names of plants Tree Stratum (Plot size .3 ft) 1 Absolute % Cover % Dominant Indicator Species? Status Dominance Test Worksheet Number of Dominant Species that are OBL, FACW, or FAC 2 % (excluding FAC-) (A) 3 % Total Number of Dominant 4 % Species Across All Strata (B) 0 % = Total Cover Sapling/Shrub Stratum (Plot size .f1) Percent of Dominant Species that are OBL, FACW, or FAC (A/B) 1 % 2 % Prevalence Index Worksheet 3 % 4 % Total % Cover of Multiply by 5 % OBL species % x 1 = 0 0 % = Total Cover FACW species % x 2 = 0 FAC species % x 3 = 0 Herb Stratum (Plot size 5 ft ) FACU species % x 4= 0 1 Persicana pensvlvarnce 35 % Y FACW UPL species % x 5 = 0 2 Schoenoplectus pungens 15 % Y OBL Column Totals 0% (A) 0 (B) 3 Rumex cnspus 3 % N FAC Prevalence Index = B/A = 4 Chenopodwm album N FACU 2 % 5 Phleum pretense N FACU Hydrophytc Vegetation Indicators 7 % % g 7 % ® 1 Rapid Test for Hydrophybc Vegetation 8 % ❑ 2 Dominance Test is >50% 9 % ❑ 3 Prevalence Index is ≤3 0' 10 % 62 % El Morphological Adaptations' (Provide supporting data in Remarks or on a separate sheet) = Total Cover , Woody Vine Stratum (Plot size 30 ft ) 1 ❑ Problematic Hydrophytc Vegetation' (explain) % %1 Indicators of hydnc sod and wetland hydrology must be present, unless disturbed or problematic 2 = Total Cover 0 % Bare Ground in Herb Stratum 38 % Hydrophybc Vegetation Present? ® Yes ❑ No Remarks The rapid test for hydrophytic vegetation is met US Army Corps of Engineers Great Plains — Version 2 0 SOIL Sampling Point DP1 Profile Description (Descnbe to the depth needed to document the indicator or confirm the absence of indicators ) Depth Matrix Redox Features (inches) Color (moist) % --. Color (moist) % Type' Loc2 Texture Remarks 0-3 10YR 3/1 100 Loam 3-12 10YR 2/1 88 7 5YR 3/3 12 C PL Loam 'Type C=Concentration, D=Depletion, RM=Reduced Matrix, CS=Covered or Coated Sand Grams 2Location PL=Pore Lining, M=Matrix Hydnc Soil Indicators (Applicable to all LRRs, unless otherwise noted ) ❑ Histosol (A1) ❑ Sandy Gleyed Matrix (S4) ❑ Histic Epipedon (A2) ❑ Sandy Redox (S5) ❑ Black Hist. (A3) ❑ Stripped Matrix (S6) ❑ Hydrogen Sulfide (A4) ❑ Loamy Mucky Mineral (F1) ❑ Stratified Layers (A5) (LRR F) ❑ Loamy Gleyed Matrix (F2) ❑ 1 cm Muck (A9) (LRR F, G, H) ❑ Depleted Matnx (F3) ❑ Depleted Below Dark Surface (A11) ® Redox Dark Surface (F6) ❑ Thick Dark Surface (Al2) ❑ Depleted Dark Surface (F7) ❑ Sandy Mucky Mineral (S1) ❑ Redox Depressions (F8) ❑ 2 5 cm Mucky Peat or Peat (S2) (LRR G, H) ❑ High Plains Depressions (F16) ❑ 5 cm Mucky Peat or Peat (S3) (LRR F) (MLRA 72 & 73 of LRR H) Indicators for Problematic Hydnc sods. ❑ 1 cm Muck (A9) (LRR I, J) ❑ Coast Praine Redox (A16) (LRR F, G, H) ❑ Dark Surface (S7) (LRR G) ❑ High Plains Depressions (F16) (LRR H outside of MLRA 72 & 73) ❑ Reduced Vertic (F18) ❑ Red Parent Matenal (TF2) ❑ Very Shallow Dark Surface (TF 12) ❑ Other (Explain in Remarks) .Indicators of hydrophytic vegetation and wetland hydrology must be present, unless disturbed or problematic Restnctwe Layer (if present) Type Depth (inches) Hydnc Soil Present, ® Yes ❑ No Remarks Hydnc soil indicator F6 is met HYDROLOGY Wetland Hydrology Indicators Pnmary Indicators (minimum of one required, check all that apply) ® Surface Water (A1) ® High Water Table (A2) ® Saturation (A3) ❑ Water Marks (B1) ❑ Sediment Deposits (B2) ❑ Dnft Deposits (B3) ❑ Algal Mat or Crust (B4) ❑ Iron Deposits (B5) ❑ Inundation Visible on Aenal Imagery (B7) ❑ Water -Stained Leaves (B9) ❑ Salt Crust (611) ❑ Aquatic Invertebrates (B13) ❑ Hydrogen Sulfide Odor (C1) ❑ Dry -Season Water Table (C2) ❑ Oxidized Rh¢ospheres on Living Roots (C3) (where not tilled) ❑ Presence of Reduced Iron (C4) ❑ Thin Muck Surface (C7) ❑ Other (Explain in Remarks) Secondary Indicators (2 or more required) ❑ Surface Sod Cracks (86) ❑ Sparsely Vegetated Concave Surface (B8) ❑ Drainage Patterns (B10) ❑ Oxidized Rhizospheres on Living Roots (C3) (where tilled) ❑ Crayfish Burrows (C8) ❑ Saturation Visible on Aenal Imagery (C9) ® Geomorphic Position (D2) ® FAC-Neutral Test (D5) ❑ Frost -Heave Hummocks (D7) (LRR F) Field Observations Depth Yes No (inches) Surface Water present? ® ❑ 15 Water Table present? ® ❑ 0 Saturation Present, ��. ❑ 0 (includes capillary fringe) Wetland Hydrology Present, El Descnbe Recorded Data (stream gauge, monitoring well, aerial photos, previous inspections, etc ), if available Remarks Indicators Al, A2, A3, D2, and D5 are met US Army Corps of Engineers Great Plains —Version 2 0 WETLAND DETERMINATION DATA EORI!!l — Great Plains Region Project/Site P125 Gravel Mme Applicant/Owner Raptor Materials Investigator(s) Mane Russo & Ashlee Caruana Landform (hdlslope, terrace, etc ) Terrace Subregion (LRR) Western Great Plains Range & Imgated Region Lat 40 199367 Long -104 910867 Datum NAD83 City/County Weld County Sampling Date 7/12/2024 State CO Sampling Pomt DP2 Section, Township, Range ,Section 29, T3N, R67W, 6th PM Local relief (concave, convex, none) None Slope (%) 0 % Soil Map Unit Name Ellicott -Ellicott sandy -skeletal complex, 0 to 3 percent'slopes NWI Classification None Are climate/hydrologic conditions on the site typical for this time of year? Yes ❑ No (If no, explain in Remarks) Vegetation Sod Hydrology Are "Normal Circumstances" present? ® Yes ❑ No Significantly Disturbed? ❑ ❑ ❑ Naturally Problematic? ❑ ❑ ❑ (If needed, explain any answers in Remarks) SUMMARY OF FINDINGS — Attach site map showing sampling point locations, transects, important features, etc Yes No Hydrophytic Vegetation Present? ❑ El Hydnc Soil Present? ❑ El Wetland Hydrology Present? ❑ El is the Sampled Area within a Wetland? ❑ El Remarks Upland data point VEGETATION — Use scientific names of plants Tree Stratum (Plot size 30 ft ) 1 Populus deltoides spp momlifera Absolute % Cover 15 % Dominant Species? Y Indicator Status FAC Dominance Test Worksheet Number of Dominant Species that are OBL, FACW, or FAC 2 % (excluding FAC-) 2 (A) 3 % % Total Number of Dominant Species Across All Strata 4 (B) 4 15 % = Total Cover Sapling/Shrub Stratum Plot size 15 ft ( ) Percent of Dominant Species that are OBL, FACW, or FAC 50% (A/B) 1 % 2 % Prevalence Index Worksheet 3 % 4 % Total % Cover of Multiply by 5 % OBL species %x1= 0 0 % = Total Cover FACW species % x 2 = 0 FAC species % x 3 = 0 Herb Stratum (Plot size 5 ft ) FACU species % x 4 = 0 1 Pascopyrum smith! 25 % Y FACU UPL species % x 5 = 0 2 Salsola traqus 20 % Y FACU Column Totals 0% (A) 0 (B) 3 Distichlis smcata 25 % % Y FACW Prevalence Index = B/A = 4 5 % Hydrophytic Vegetation Indicators 6 % 7 % ❑ 1 Rapid Test for Hydrophytic Vegetation 8 % ❑ 2 Dominance Test is >50% 9 % ❑ 3 Prevalence Index is ≤3 0' 10 % 70 % = Total Cover El Morphological Adaptations' (Provide supporting data in Remarks or on a separate sheet) Woody Vine Stratum (Plot size 30 ft ) 1 ❑ Problematic Hydrophytic Vegetation' (explain) % % 0 % ' Indicators of hydnc sod and wetland hydrology must be present, unless disturbed or problematic 2 = Total Cover Bare Ground in Herb Stratum 30 % Hydrophytic Vegetation Present? ❑ Yes No Remarks Indicators of hydrophytic vegetation are not met US Army Corps of Engineers Great Plains — Version 2 0 SOIL Sampling Point DP2 Profile Description (Describe to the depth needed to document the indicator or confirm the absence of indicators ) Depth Matrix Redox Features (inches) Color (moist) % Color (moist) % Type' Loc2 Texture Remarks 'Type C=Concentration, D=Depletion, RM=Reduced Matrix, CS=Covered or Coated Sand Grains 2Location PL=Pore Lining, M=Matrix Hydnc Sod Indicators (Applicable to all LRRs, unless otherwise noted ) ❑ Histosol (A1) ❑ Sandy Gleyed Matrix (S4) ❑ Histic Epipedon (A2) ❑ Sandy Redox (S5) ❑ Black Histic (A3) ❑ Stnpped Matrix (S6) - ❑ Hydrogen Sulfide (A4) ❑ Loamy Mucky Mineral (F1) ❑ Stratified Layers (A5) (LRR F) ❑ Loamy Gleyed Matnx (F2) ❑ 1 cm Muck (A9) (LRR F, G, H) ❑ Depleted Matnx (F3) ❑ Depleted Below Dark Surface (A11) ❑ Redox Dark Surface (F6) ❑ Thick Dark Surface (Al2) ❑ Depleted Dark Surface (F7) ❑ Sandy Mucky Mineral (Si) ❑ Redox Depressions (F8) ❑ 2 5 cm Mucky Peat or Peat (S2) (LRR G, H) ❑ High Plains Depressions (F16) ❑ 5 cm Mucky Peat or Peat (S3) (LRR F) (MLRA 72 & 73 of LRR H) Indicators for Problematic Hydnc sods. ❑ 1 cm Muck (A9) (LRR 1, J) ❑ Coast Prairie Redox (A16) (LRR F, G, H) ❑ Dark Surface (S7) (LRR G) ❑ High Plains Depressions (F16) (LRR H outside of MLRA 72 & 73) ❑ Reduced Vertic (F18) ❑ Red Parent Material (f F2) ❑ Very Shallow Dark Surface (TF 12) ❑ Other (Explain in Remarks) •Indicators of hydrophytic vegetation and wetland hydrology must be present, unless disturbed or problematic Restrictive Layer (if present) Type Depth (inches) Hydre Soil Present, ❑ Yes ® No Remarks Sod sample not taken due to a lack of wetland hydrology and presence of upland vegetat on Hydnc soils are assumed absent , HYDROLOGY Wetland Hydrology Indicators Primary Indicators (minimum of one required, check all that apply) ❑ Surface Water (A1) ❑ High Water Table (A2) ❑ Saturation (A3) ❑ Water Marks (B1) ❑ Sediment Deposits (B2) ❑ Drift Deposits (B3) ❑ Algal Mat or Crust (B4) ❑ Iron Deposits (B5) ❑ Inundation Visible on Aerial Imagery (B7) ❑ Water -Stained Leaves (B9) ❑ Salt Crust (B11) ❑ Aquatic Invertebrates (B13) ❑ Hydrogen Sulfide Odor (C1) ❑ Dry -Season Water Table (C2) ❑ Oxidized Rh¢ospheres on Living Roots (C3) (where not tilled) ❑ Presence of Reduced Iron (C4) ❑ Thin Muck Surface (C7) ❑ Other (Explain in Remarks) Secondary Indicators (2 or more required) ❑ Surface Sod Cracks (B6) ❑ Sparsely Vegetated Concave Surface (B8) ❑ Drainage Patterns (B10) ❑ Oxidized Rhizospheres on Living Roots (C3) (where tilled) ❑ Crayfish Burrows (C8) ❑ Saturation Visible on Aerial Imagery (C9) ❑ Geomorphic Position (D2) ❑ FAC-Neutral Test (D5) ❑ Frost -Heave Hummocks (D7) (LRR F) Field Observations Surface Water present? Water Table present, Saturation Present, (includes capillary fnnge) Wetland Hydrology Present, Depth Yes No (inches) O El O El O El Describe Recorded Data (stream gauge, monitoring well, aerial photos, previous inspections, etc ), if available Remarks Hydrology indicators are not met US Army Corps of Engineers Great Plains —Version 2 0 WETLAND DETERMINATION DATA FORM — Great P ame "eglon Project/Site P125 Gravel Mme Applicant/Owner Raptor Matenals Investigator(s) Mane Russo & Ashlee Caruana Section, Township, Range Section 29, T3N, R67W, 6th PM City/County Weld County Sampling Date 7/12/2024 State CO Sampling Point DP3 Landform (hillslope, terrace, etc ) Swale Subregion (LRR) Western Great Plains Range & Irrigated Region Lat 40 19861945 Long -104 9111372 Datum NAD83 Soil Map Unit Name Aquolls and Aquents, gravelly substratum NWI Classification None Are climate/hydrologic conditions on the site typical for this time of year? ® Yes ❑ No (If no, explain en Remarks) Vegetation Sod Hydrology Are "Normal Circumstances" present? ® Yes ❑ No Significantly Disturbed? ❑ ❑ ❑ Naturally Problematic? ❑ ❑ ❑ (If needed, explain any answers in Remarks) SUMMARY OF FINDINGS — Attach site map showing sampling point locations, transects, important features, etc Local relief (concave, convex, none) Concave Slope (%) 0 % Hydrophytic Vegetation Present? Hydnc Sod Present? Wetland Hydrology Present? Is the Sampled Area within a Wetland? Yes El El No Remarks Wetland data point VEGETATION — Use scientific names of plants Tree Stratum (Plot size 30 ft) 1 Absolute % Cover % Dominant Indicator Species? Status Dominance Test Worksheet Number OBL�f DominantSpecies that FACW or FAC 2 % are (excluding FAC-) (A) 3 % Total Number of Dominant 4 % Species Across All Strata (B) 0 % = Total Cover Sapling/Shrub Stratum (Plot size 15 ft ) Percent of Dominant Species that are OBL, FACW, or FAC (A/B) 1 % 2 % Prevalence Index Worksheet 3 % % Total % Cover of Multiply by 4 5 % OBL species %x1= 0 0 % = Total Cover FACW species % x 2 = 0 FAC species % x 3 = 0 Herb Stratum (Plot size 5 ft ) FACU species % x 4 = 0 1 Schoenoplectus pungens 30 % Y OBL UPL species % x 5= 0 2 Nordeum tubatum 30 % Y FACW Column Totals 0% (A) 0 (B) 3 Rumex cnspus 5 % 15 % N FAC Prevalence Index = B/A = N OBL 4 Carex cf emoro 5 Hydrophytic Vegetation Indicators % g % 7 % ® 1 Rapid Test for Hydrophytic Vegetation 8 % El2 Dominance Test is >50% 9 % ❑ 3 Prevalence Index s ≤3 0' 10 80 %% El Morphological Adaptations' (Provide supporting data in Remarks or on a separate sheet) = Total Cover Woody Vine Stratum (Plot size 30 ft ) 1 ❑ Problematic Hydrophytic Vegetation' (explain) % %1 Indicators of hydnc sod and wetland hydrology must be present, unless disturbed or problematic 2 = Total Cover 0 % Bare Ground in Herb Stratum 20 % Hydrophytic Vegetation Present? ® Yes ❑ No Remarks The rapid test for hydrophytic vegetation is met US Army Corps of Engineers Great Plains — Version 2 0 SOIL Sampling Point DP3 Profile Description (Descnbe to the depth needed to document the indicator or confirm the absence of indicators ) Depth Matrix Redox Features (inches) Color (moist) % Color (moist) % Type' Loc2 Texture Remarks 0-8 10YR 3/1 75 5YR 3/4 25 C M Silty Clay Loam 'Type C=Concentration, D=Depletion, RM=Reduced Matrix, CS=Covered or Coated Sand Grams Iocation PL=Pore Lining, M=Matrix Hydnc Sod Indicators (Applicable to all LRRs, unless otherwise noted ) ❑ Histosol (A1) ❑ Sandy Gleyed Matnx (S4) ❑ Histic Epipedon (A2) ❑ Sandy Redox (S5) ❑ Black Hist. (A3) ❑ Stnpped Matrix (S6) ❑ Hydrogen Sulfide (A4) ❑ Loamy Mucky Mineral (F1) ❑ Stratified Layers (A5) (LRR F) ❑ Loamy Gleyed Matnx (F2) ❑ 1 cm Muck (A9) (LRR F, G, H) ❑ Depleted Matnx (F3) ❑ Depleted Below Dark Surface (A11) ® Redox Dark Surface (F6) ❑ Thick Dark Surface (Al2) ❑ Depleted Dark Surface (F7) ❑ Sandy Mucky Mineral (S1) ❑ Redox Depressions (F8) ❑ 2 5 cm Mucky Peat or Peat (S2) (LRR G, H) ❑ High Plains Depressions (F16) ❑ 5 cm Mucky Peat or Peat (S3) (LRR F) (MLRA 72 & 73 of LRR H) Indicators for Problematic Hydnc sods. ❑ 1 cm Muck (A9) (LRR I, J) ❑ Coast Praine Redox (A16) (LRR F, G, H) ❑ Dark Surface (S7) (LRR G) ❑ High Plains Depressions (F16) (LRR H outside of MLRA 72 & 73) ❑ Reduced Vert. (F18) ❑ Red Parent Matenal (TF2) ❑ Very Shallow Dark Surface (TF 12) ❑ Other (Explain in Remarks) 3lndicators of hydrophytic vegetation and wetland hydrology must be present, unless disturbed or problematic Restrictive Layer (if present) Type Depth (inches) Hydric Soil Present, ® Yes ❑ No Remarks Hydnc soil iridicator F6 is met HYDROLOGY Wetland Hydrology Indicators Primary Indicators (minimum of one required, check all that apply) ❑ Surface Water (A1) ❑ High Water Table (A2) ❑ Saturation (A3) ❑ Water Marks (B1) ❑ Sediment Deposits (B2) ❑ Dnft Deposits (B3) ❑ Algal Mat or Crust (B4) i ❑ Iron Deposits (B5) ❑ Inundation Visible on Aerial Imagery (B7) ❑ Water -Stained Leaves (B9) ❑ Salt Crust (B11) ❑ Aquatic Invertebrates (B13) ❑ Hydrogen Sulfide Odor (C1) ❑ Dry -Season Water Table (C2) ❑ Oxidized Rhizospheres on Living Roots (C3) (where not tilled) ❑ Presence of Reduced Iron (C4) ❑ Thin Muck Surface (C7) ❑ Other (Explain in Remarks) Secondary Indicators (2 or more required) ❑ Surface Sod Cracks (B6) ❑ Sparsely Vegetated Concave Surface (B8) ❑ Drainage Patterns (B10) ❑ Oxidized Rhizospheres on Living Roots (C3) (where tilled) ❑ Crayfish Burrows (C8) ❑ Saturation Visible on Aenal Imagery (C9) ® Geomorphic Position (D2) ® FAC-Neutral Test (D5) ❑ Frost -Heave Hummocks (D7) (LRR F) Field Observations Surface Water present? Water Table present, Saturation Present, (includes capillary fnnge) Wetland Hydrology Present, - Depth Yes No (inches) o o o o El ® ❑ Describe Recorded Data (stream gauge, monitoring well, aenal photos, previous inspections, etc ), if available Remarks Hydrology indicators D2 and D5 are met US Army Corps of Engineers Great Plains — Version 2 0 WETLAND DETERMINATION DATA FORM — Great Plains Region Project/Site P125 Gravel Mine Applicant/Owner Raptor Materials Investigator(s) Mane Russo & Ashlee Caruana Section, Township, Range Section 29, T3N, R67W, 6th PM Landform (hdlslope, terrace, etc ) Upland terrace Local relief (concave, convex, none) none Slope (%) 0 % Subregion (LRR) Western Great Plains Range & Irrigated Region Lat 40 198646 Long -104 911216 Datum NAD83 Soil Map Unit Name Aquolls and Aquents, gravelly substratum NWI Classification None Are climate/hydrologic conditions on the site typical for this time of year? ® Yes ❑ No (If no, explain in Remarks) Vegetation Soil Hydrology Are "Normal Circumstances" present? ® Yes ❑ No Significantly Disturbed? ❑ ❑ ❑ Naturatly Problematic? ❑ ❑ ❑ (If needed, explain any answers in Remarks) SUMMARY OF FINDINGS — Attach site map showing sampling point locations, transects, important features, etc City/County Weld County Sampling Date 7/12/2024 State CO Sampling Point DP4 Yes No Hydrophytic Vegetation Present? ❑ Hydnc Sod Present? ❑ Wetland Hydrology Present? ❑ Is the Sampled Area within a Wetland? ❑ Remarks Upland data point VEGETATION — Use scientific names of plants Tree Stratum (Plot size 30 ft) 1 Absolute % Cover % Dominant Species, Indicator Status Dominance Test Worksheet Number of Dominant Species that are OBL, FACW, or FAC 2 % (excluding FAC-) 0 (A) 3 % 4 % Total Number of Dominant Species Across All Strata 2 (B) 0 % = Total Cover Sapling/Shrub Stratum (Plot size 15 ft ) Percent of Dominant Species that are OBL, FACW, or FAC 0% (NB) 1 % 2 % Prevalence Index Worksheet 3 % 4 % Total % Cover of Multiply by 5 % OBL species % x 1 = 0 0 % = Total Cover FACW species % x 2= 0 FAC species % x 3 = 0 Herb Stratum (Plot size 5 ft ) FACU species % x 4 = 0 1 Pascopyrum Smithy 65 % Y FACU UPL species % x 5= 0 2 Carduus nutans 20 % Y FACU Column Totals 0% (A) 0 (B) 3 Crrsium arvense 5 % % N FACU Prevalence Index = B/A = 4 5 % Hydrophytic Vegetation Indicators 6 % 7 % ❑ 1 Rapid Test for Hydrophytic Vegetation 8 % DI2 Dominance Test is,50% 9 % ❑ 3 Prevalence Index is ≤3 0' 10 % 90 % = Total Cover ❑ 4 Morphological Adaptations' (Provide supporting data in Remarfis or on a separate sheet) Woody Vine Stratum (Plot size 30 ft ) 1 % , ❑ Problematic Hydrophytic Vegetation' (explain) 2 % 0 % ' Indicators of hydnc sod and wetland hydrology must be present, unless disturbed or problematic = Total Cover Bare Ground in Herb Stratum 10 % Hydrophytic Vegetation Present? DI Yes ® No Remarks Indicators of hydrophytic vegetation are not met US Army Corps of Engineers Great Plains — Version 2 0 SOIL Sampling Point DP4 Profile Description (Describe to the depth needed to document the indicator or confirm the absence of indicators ) Depth Matrix Redox Features (inches) Color (moist) % Color (moist) % Type' Loc2 Texture Remarks 'Type C=Concentration, D=Depletion, RM=Reduced Matnx, CS=Covered or Coated Sand Grains 2Location PL=Pore Lining, M=Matrix Hydnc Sod Indicators (Applicable to all LRRs, unless otherwise noted ) ❑ Histosol (A1) ❑ Sandy Gleyed Matnx (S4) ❑ Histic Epipedon (A2) ❑ Sandy Redox (S5) ❑ Black Histic (A3) ❑ Stnpped Matrix (S6) ❑ Hydrogen Sulfide (A4) ❑ Loamy Mucky Mineral (F1) ❑ Stratified Layers (A5) (LRR F) ❑ Loamy Gleyed Matrix (F2) ❑ 1 cm Muck (A9) (LRR F, G, H) ❑ Depleted Matnx (F3) ❑ Depleted Below Dark Surface (A11) ❑ Redox Dark Surface (F6) ❑ Thick Dark Surface (Al2) ❑ Depleted Dark Surface (F7) ❑ Sandy Mucky Mineral (S1) ❑ Redox Depressions (F8) ❑ 2 5 cm Mucky Peat or Peat (S2) (LRR G, H) ❑ High Plains Depressions (F16) ❑ 5 cm Mucky Peat or Peat (S3) (LRR F) (MLRA 72 & 73 of LRR H) Indicators for Problematic Hydnc Solle ❑ 1 cm Muck (A9) (LRR I, J) ❑ Coast Praine Redox (A16) (LRR F, G, H) ❑ Dark Surface (S7) (LRR G) ❑ High Plains Depressions (F16) (LRR H outside of MLRA 72 & 73) ❑ Reduced Vertic (F18) ❑ Red Parent Matenal (TF2) ❑ Very Shallow Dark Surface (TF 12) ❑ Other (Explain in Remarks) 3lndicators of hydrophytic vegetation and wetland hydrology must be present, unless disturbed or problematic Restrictive Layer (if present) Type Depth (inches) Hydnc Soil Present? ❑ Yes ® No Remarks Sod sample not taken due to lack of indicators of wetland hydrology and hydrophtyic vegetation Hydnc soils assumed absent t HYDROLOGY Wetland Hydrology Indicators Primary Indicators (minimum of one required, check all that apply) ❑ Surface Water (A1) ❑ High Water Table (A2) ❑ Saturation (A3) ❑ Water Marks (B1) ❑ Sediment Deposits (B2) ❑ Dnft Deposits (B3) ❑ Algal Mat or Crust (B4) ❑ Iron Deposits (B5) ❑ Inundation Visible on Aenal Imagery (B7) ❑ Water -Stained Leaves (B9) ❑ Salt Crust (B11) ❑ Aquatic Invertebrates (B13) ❑ Hydrogen Sulfide Odor (C1) ❑ Dry -Season Water Table (C2) ❑ Oxidized Rh¢ospheres on Living Roots (C3) (where not tilled) ❑ Presence of Reduced Iron (C4) ❑ Thin Muck Surface (C7) ❑ Other (Explain in Remarks) Secondary Indicators (2 or more required) ❑ Surface Sod Cracks (86) ❑ Sparsely Vegetated Concave Surface (B8) ❑ Drainage Patterns (B10) ❑ Oxidized Rhizospheres on Living Roots (C3) (where tilled) ❑ Crayfish Burrows (C8) ❑ Saturation Visible on Aerial Imagery (C9) ❑ Geomorphic Position (D2) ❑ FAC-Neutral Test (D5) ❑ Frost -Heave Hummocks (D7) (LRR F) Field Observations Surface Water present? Water Table present, Saturation Present, (includes capillary fnnge) Wetland Hydrology Present? ❑ Depth Yes No (inches) 0 El 0 El El Descnbe Recorded Data (stream gauge, monitoring well, aenal photos, previous inspections, etc ), rf available Remarks No hydrology indicators are met US Army Corps of Engineers Great Plains — Version 2 0 WETLAND DETERMINATION DATA PORRII — Great Plains Region Project/Site P125 Gravel Mme Applicant/Owner Raptor Materials Investigator(s) Mane Russo & Ashlee Caruana Section, Township, Range Section 29, T3N, R67W, 6th PM Landform (hillslope, terrace, etc ) Depression/Swale Subregion (LRR) Westem Great Plains Range & Imgated Region Lat 40 197108 Long -104 91544 Datum NAD83 Sod Map Unit Name Aquolls and Aquents, gravelly substratum NWI Classification PUBF Are climate/hydrologic conditions on the site typical for this time of years ® Yes ❑ No (If no, explain in Remarks) City/County Weld County Sampling Date 7/12/2024 State CO Sampling Point DP5 Local relief (concave, convex, none) Concave Slope (%) 0 % Significantly Disturbed, Naturally Problematic, SUMMARY OF FINDINGS — Attach site map showing sampling point locations, transects, important features, etc Vegetation Sod Hydrology ❑ ❑ ❑ ❑ ❑ ❑ Are "Normal Circumstances" present, El Yes ❑ No (If needed, explain any answers in Remarks) Hydrophytc Vegetation Present, Hydnc Soil Present, Wetland Hydrology Present, Is the Sampled Area within a Wetland? Yes No El ❑ ® ❑ ® ❑ — Use scientific names of plants Remarks Wetland data point Absolute Tree Stratum (Plot size 30 ft) % Cover 1 % Dominant Indicator Species, = Total Cover Status Dominance Test Worksheet Number of Dominant Species that are OBL, FACW, or FAC (excluding FAC-) 1 (A) 2 % 3 % Total Number of Dominant Species Across All Strata 1 (B) 4 % 0 % Sapling/Shrub Stratum (Plot size 15 ft) 1 % Percent of Dominant Species that are OBL, FACW, or PAC 100% (A/B) 2 % Prevalence Index Worksheet , ° Total /° Cover of Multiply by 3 % % 4 5 % OBL species %x1= 0 0 % Herb Stratum (Plot size 5 ft ) 1 Rumex cnspus 80 % = Total Cover Y PAC FACW species % x 2= 0 PAC species % x 3= 0 FACU species % x 4 = 0 UPL species % x 5 = 0 2 Cardamme pensvlvanica 15 % N FACW Column Totals 0% (A) 0 (B) 3 % Prevalence Index = B/A = % 4 5 % Hydrophytc Vegetation Indicators ❑ 1 Rapid Test for Hydrophytc Vegetation ® 2 Dominance Test is >50% ❑ 3 Prevalence Index is ≤3 0' El Morphological Adaptations' (Provide supporting data in Remarks or on a separate sheet) ❑ Problematic Hydrophyhc Vegetation' (explain) Indicators of hydnc sod and wetland hydrology must be present, unless disturbed or problematic 6 % 7 % 8 % g % 10 % 95 % Woody Vine Stratum (Plot size 30 ft ) 1 % = Total Cover 2 % 0 % 1 Bare Ground in Herb Stratum 5 % = Total Cover Hydrophytc Vegetation Present, El Yes ❑ No Remarks The dominance test for hydrophytic vegetation is me t US Army Corps of Engineers Great Plains — Version 2 0 SOIL Sampling Point DP5 Profile Description (Describe to the depth needed to document the indicator or confirm the absence of indicators ) Depth Matrix Redox Features (inches) Color (moist) % Color (moist) % Type' Lac' Texture Remarks 0-4 10YR 3/2 100 Silty Loam 4-12 10YR 3/2 90 10YR 3/4 10 C M Silty Loam 'Type C=Concentration, D=Depletion, RM=Reduced Matnx, CS=Covered or Coated Sand Grams 2Location PL=Pore Lining, M=Matnx Hydnc Sod Indicators (Applicable to all LRRs, unless otherwise noted ) ❑ Histosol (A1) ❑ Sandy Gleyed Matnx (S4) ❑ Hist. Epipedon (A2) ❑ Sandy Redox (S5) ❑ Black Histic (A3) ❑ Stripped Matrix (S6) ❑ Hydrogen Sulfide (A4) ❑ Loamy Mucky Mineral (F1) ❑ Stratified Layers (A5) (LRR F) ❑ Loamy Gleyed Matnx (F2) ❑ 1 cm Muck (A9) (LRR F, G, H) ❑ Depleted Matnx (F3) ❑ Depleted Below Dark Surface (A11) ® Redox Dark Surface (F6) ❑ Thick Dark Surface (Al2) ❑ Depleted Dark Surface (F7) ❑ Sandy Mucky Mineral (S1) ❑ Redox Depressions (F8) ❑ 2 5 cm Mucky Peat or Peat (S2) (LRR G, H) ❑ High Plains Depressions (F16) ❑ 5 cm Mucky Peat or Peat (S3) (LRR F) (MLRA 72 & 73 of LRR H) Indicators for Problematic Hydnc sods. ❑ 1 cm Muck (A9) (LRR I, J) ❑ Coast Prairie Redox (A16) (LRR F, G, H) ❑ Dark Surface (S7) (LRR G) ❑ High Plains Depressions (F16) (LRR H outside of NILRA 72 & 73) ❑ Reduced Vertic (F18) ❑ Red Parent Material (TF2) ❑ Very Shallow Dark Surface (TF 12) ❑ Other (Explain in Remarks) .Indicators of hydrophytic vegetation and wetland hydrology must be present, unless disturbed or problematic Restrictive Layer Of present) Type Depth (inches) Hydnc Soil Present, ® Yes ❑ No Remarks Hydnc soil indicator F6 is met HYDROLOGY Wetland Hydrology Indicators Primary Indicators (minimum of one required, check all that apply) ❑ Surface Water (A1) ❑ High Water Table (A2) ❑ Saturation (A3) ❑ Water Marks (B1) ❑ Sediment Deposits (B2) ❑ Drift Deposits (B3) ❑ Algal Mat or Crust (B4) ❑ Iron Deposits (B5) ❑ Inundation Visible on Aerial Imagery (B7) ❑ Water -Stained Leaves (B9) ❑ Salt Crust (B11) ❑ Aquatic Invertebrates (B13) ❑ Hydrogen Sulfide Odor (C1) ❑ Dry -Season Water Table (C2) ❑ Oxidized Rhizospheres on Living Roots (C3) (where not tilled) ❑ Presence of Reduced Iron (C4) ❑ Thin Muck Surface (C7) ❑ Other (Explain in Remarks) Secondary Indicators (2 or more required) ® Surface Sod Cracks (B6) ❑ Sparsely Vegetated Concave Surface (B8) ❑ Drainage Patterns (B10) ❑ Oxidized Rhizospheres on Living Roots (C3) (where tilled) ❑ Crayfish Burrows (C8) ❑ Saturation Visible on Aerial Imagery (C9) ® Geomorphic Position (D2) ® FAC-Neutral Test (D5) ❑ Frost -Heave Hummocks (D7) (LRR F) Field Observations Surface Water present, Water Table present? Saturation Present, (includes capillary fnnge) Wetland Hydrology Present, El Depth Yes No (inches) El o o o El Describe Recorded Data (stream gauge, monitoring well, aenal photos, previous inspections, etc ), if available Remarks Hydrology indicators B6, D2, and D5 are met US Army Corps of Engineers Great Plains — Version 2 0 WETLAND DETERYU NATMN DATA FORM — Great Plains Region Project/Site P125 Gravel Mme Applicant/Owner Raptor Matenals Investigator(s) Mane Russo & Ashlee Caruana Section, Township, Range Section 29, T3N, R67W, 6th PM City/County Weld County Sampling Date 7/12/2024 State CO Sampling Point DP6 Landform (hillslope, terrace, etc ) Terrace Subregion (LRR) Western Great Plains Range & Irrigated Region Lat 40 197163 Long 104 915408 Datum NAD83 Sod Map Unit Name Aquolls and Aquents, gravelly substratum NWI Classification None Are climate/hydrologic conditions on the site typical for this time of year, Yes ❑ No (If no, explain in Remarks) Local relief (concave, convex, none) none Slope (%) 0 % Vegetation Sod Hydrology Significantly Disturbed, ❑ ❑ ❑ Naturally Problematic, ❑ ❑ ❑ Are "Normal Circumstances" present, ® Yes ❑ No (If needed, explain any answers in Remarks) SUMMARY OF FINDINGS — Attach site map showing sampling point locations, transects, important features, etc Yes No Hydrophytic Vegetation Present, ❑ El Hydnc Sod Present, ❑ El Wetland Hydrology Present, ❑ El Is the Sampled Area within a Wetland, ❑ El Remarks Upland data point VEGETATION — Use scientific names of plants Tree Stratum (Plot size 30 ft 1 Absolute % Cover % Dominant Species, Indicator Status Dominance Test Worksheet Number of Dominant Species that are OBL, FACW, or FAC 2 % _ (excluding FAC-) 0 (A) 3 % % Total Number of Dominant Species Across All Strata 3 (B) 4 0 % = Total Cover Sapling/Shrub Stratum Plot size 15 ft ( ) Percent of Dominant Species that ° are OBL, FACW, or FAC 0 /° (A/B) 1 % 2 % Prevalence Index Worksheet 3 % 4 % Total % Cover of Multiply by 5 % OBL species % x 1= 0 0 % = Total Cover FACW species % x 2= 0 FAC species % x 3 = 0 Herb Stratum (Plot size 5 ft ) FACU species % x 4 = 0 1 Crchonum mtybus 5 % N FACU UPL species % x 5= 0 2 Bromus mermus 15 % Y UPL Column Totals 0% (A) 0 (B) 3 Gaura brenms 5 % 10 % N FACU Prevalence Index = B/A= 4 Phyla frutrcosa N FAC 5 Convolvulus arvensrs 15 % Y UPL Hydrophytic Vegetation Indicators 6 Pascoovrum smrthrr 25 % Y FACU 7 % ❑ 1 Rapid Test for Hydrophytic Vegetation 8 % ❑ 2 Dominance Test is >50% 9 % ❑ 3 Prevalence Index is ≤3 0' 10 % 75 % = Total Cover El Morphological Adaptations' (Provide supporting data in Remarks or on a separate sheet) Woody Vine Stratum 1 (Plot size al ft) ❑ Problematic Hydrophytic Vegetation' (explain) % % 0 % ' Indicators of hydnc sod and wetland hydrology must be present, unless disturbed or problematic 2 = Total Cover Bare Ground in Herb Stratum 25 % Hydrophytic Vegetation Present, ElYes ® No Remarks Indicators of hydrophytic vegetation are not met US Army Corps of Engineers Great Plains — Version 2 0 SOIL Sampling Point DP6 Profile Description (Describe to the depth needed to document the indicator or confirm the absence of indicators ) Depth Matrix Redox Features (inches) Color (moist) % Color (moist) % Type' Locz Texture Remarks 'Type C=Concentration, D=Depletion, RM=Reduced Matnx, CS=Covered or Coated Sand Grains 2Location PL=Pore Lining, M=Matrix Hydnc Soil Indicators (Applicable to all LRRs, unless otherwise noted ) ❑ Histosol (A1) ❑ Sandy Gleyed Matnx (S4) ❑ Histic Epipedon (A2) ❑ Sandy Redox (S5) ❑ Black Hist. (A3) ❑ Stnpped Matnx (S6) ❑ Hydrogen Sulfide (A4) ❑ Loamy Mucky Mineral (F1) ❑ Stratified Layers (A5) (LRR F) ❑ Loamy Gleyed Matnx (F2) ❑ 1 cm Muck (A9) (LRR F, G, H) ❑ Depleted Matnx (F3) ❑ Depleted Below Dark Surface (A11) ❑ Redox Dark Surface (F6) ❑ Thick Dark Surface (Al2) ❑ Depleted Dark Surface (F7) ❑ Sandy Mucky Mineral (S1) ❑ Redox Depressions (F8) ❑ 2 5 cm Mucky Peat or Peat (S2) (LRR G, H) ❑ High Plains Depressions (F16) ❑ 5 cm Mucky Peat or Peat (S3) (LRR F) (MLRA 72 & 73 of LRR H) Indicators for Problematic Hydnc Soils. ❑ 1 cm Muck (A9) (LRR I, J) ❑ Coast Praine Redox (A16) (LRR F, G, H) ❑ Dark Surface (S7) (LRR G) ❑ High Plains Depressions (F16) (LRR H outside of MLRA 72 & 73) ❑ Reduced Vertic (F18) ❑ Red Parent Material (TF2) ❑ Very Shallow Dark Surface (TF 12) ❑ Other (Explain in Remarks) .Indicators of hydrophytic vegetation and wetland hydrology must be present, unless disturbed or problematic Restrictive Layer (if present) Type Depth (inches) Hydrrc Sod Present? ❑ Yes No Remarks Sod sample not taken due to lack of hydrophytic vegetation and wetland hydrology indicators Hydnc sod is assumed absent HYDROLOGY Wetland Hydrology Indicators Pnmary Indicators (minimum of one required, check all that apply) ❑ Surface Water (A1) ❑ High Water Table (A2) ❑ Saturation (A3) ❑ Water Marks (B1) ❑ Sediment Deposits (B2) ❑ Dnft Deposits (B3) ❑ Algal Mat or Crust (B4) ❑ Iron Deposits (B5) ❑ Inundation Visible on Aenal Imagery (B7) ❑ Water -Stained Leaves (B9) ❑ Salt Crust (B11) ❑ Aquatic Invertebrates (B13) ❑ Hydrogen Sulfide Odor (C1) ❑ Dry -Season Water Table (C2) ❑ Oxidized Rhizospheres on Living Roots (C3) (where not tilled) ❑ Presence of Reduced Iron (C4) ❑ Thin Muck Surface (C7) ❑ Other (Explain in Remarks) Secondary Indicators (2 or more required) ❑ Surface Sod Cracks (B6) ❑ Sparsely Vegetated Concave Surface (B8) ❑ Drainage Patterns (B10) ❑ Oxidized Rhizospheres on Living Roots (C3) (where tilled) ❑ Crayfish Burrows (C8) ❑ Saturation Visible on Aenal Imagery (C9) ❑ Geomorphic Position (D2) ❑ FAC-Neutral Test (D5) ❑ Frost -Heave Hummocks (D7) (LRR F) Field Observations Surface Water present? Water Table present, Saturation Present? (includes capillary fringe) Wetland Hydrology Present? Depth Yes No (inches) O El O El O El O El Descnbe Recorded Data (stream gauge, monftonng well, aenal photos, previous inspections, etc ), if available Remarks Hydrology indicators are not met US Army Corps of Engineers Great Plains — Version 2 0 INETLAND DETERMINATION DATA FORM — Great Plains Revlon Project/Site P125 Gravel Mme Applicant/Owner Raptor Materials Investigator(s) Mane Russo & Ashlee Caruana Section, Township, Range Section 29, T3N, R67W, 6th PM City/County Weld County Sampling Date 7/12/2024 State CO Sampling Point DP7 Landform (hillslope, terrace, etc ) Depression Subregion (LRR) Western Great Plains Range & Irrigated Region Lat 40 195768 Long -104 911890 Datum NAD83 Sod Map Unit Name Aquolls and Aquents, gravelly substratum NWI Classification PEM1A Are climate/hydrologic conditions on the site typical for this time of year? Yes ❑ No (If no, explain in Remarks) Vegetation Sod Hydrology Are "Normal Circumstances" present, ® Yes ❑ No Significantly Disturbed? ❑ ❑ ❑ Naturally Problematic, ❑ ❑ ® (If needed, explain any answers in Remarks) SUMMARY OF FINDINGS — Attach site map showing sampling point locations, transects, important features, etc Local relief (concave, convex, none) Concave Slope (%) 0 % Yes No Hydrophytic Vegetation Present? El ❑ Hydnc Sod Present, El ❑ Wetland Hydrology Present? ® ❑ Is the Sampled Area within a Wetland, ® ❑ Remarks Wetland data point Adjacent flood irrigated field drams to this wetland VEGETATION — Use scientific names of plants Tree Stratum (Plot size 30 ft 1 Absolute % Cover % Dominant Indicator Species? Status Dominance Test Worksheet Number of Dominant Species that are OBL, FACW, or FAC (excluding FAC-) (A) 2 % % % 3 Total Number of Dominant Species Across All Strata (B) 4 0 % = Total Cover Sapling/Shrub Stratum (Plot size 15 ft Percent of Dominant Species that are OBL, FACW, or FAC (A/B) 1 % 2 % Prevalence Index Worksheet 3 4 % Total % Cover of Multiply by 5 % OBL species %x1= 0 0 % = Total Cover FACW species % x 2= 0 FAC species % x 3 = 0 Herb Stratum (Plot size 5 ft ) FACU species % x 4 = 0 1 Hordeum lubatum 20 % Y FACW UPL species % x 5= 0 2 Phalans arundmacea 20 % Y FACW Column Totals 0% (A) 0 (B) 3 Pascopyrum smith,' 15 % 25 % N FACU Prevalence Index = B/A = 4 Poa palustns Y FACW 5 Phleum pretense 15 % N FACU Hydrophytic Vegetation Indicators 6 % 7 % ® 1 Rapid Test for Hydrophytic Vegetation 8 % ❑ 2 Dominance Test is >50% 9 % ❑ 3 Prevalence Index is ≤3 0' 10 % 95 % = Total Cover El Morphological Adaptations' (Provide supporting data in Remarks or on a separate sheet) Woody Vine Stratum (Plot size 30 ft ) 1 ❑ Problematic Hydrophytic Vegetation' (explain) % % 0 % ' Indicators of hydnc sod and wetland hydrology must be present, unless disturbed or problematic 2 = Total Cover Bare Ground in Herb Stratum 5 % Hydrophytic Vegetation Present? El Yes El No Remarks The rapid test for hydrophytic vegetation is met US Army Corps of Engineers Great Plains — Version 2 0 SOIL Sampling Point DP7 Profile Description (Describe to the depth needed to document the indicator or confirm the absence of indicators ) Depth Matrix Redox Features (inches) Color (moist) % Color (moist) % Type' Loe Texture Remarks 0-12 10YR 2/1 85 7 5YR3/4 15 C M Silty Clay Loam 'Type C=Concentration, D=Depletion, RM=Reduced Matnx, CS=Covered or Coated Sand Grams 2Location PL=Pore Lining, M=Matnx Hydnc Sod Indicators (Applicable to all LRRs, unless otherwise noted ) ❑ Histosol (A1) ❑ Sandy Gleyed Matnx (S4) ❑ Histic Epipedon (A2) ❑ Sandy Redox (S5) ❑ Black Histic (A3) ❑ Stripped Matnx (S6) ❑ Hydrogen Sulfide (A4) ❑ Loamy Mucky Mineral (F1) ❑ Stratified Layers (A5) (LRR F) ❑ Loamy Gleyed Matrix (F2) ❑ 1 cm Muck (A9) (LRR F, G, H) ❑ Depleted Matrix (F3) ❑ Depleted Below Dark Surface (A11) ® Redox Dark Surface (F6) ❑ Thick Dark Surface (Al2) ❑ Depleted Dark Surface (F7) ❑ Sandy Mucky Mineral (Si) ❑ Redox Depressions (F8) ❑ 2 5 cm Mucky Peat or Peat (S2) (LRR G, H) ❑ High Plains Depressions (F16) ❑ 5 cm Mucky Peat or Peat (S3) (LRR F) (MLRA 72 & 73 of LRR H) Indicators for Problematic Hydnc Soils• ❑ 1 cm Muck (A9) (LRR 1, J) ❑ Coast Prairie Redox (A16) (LRR F, G, H) ❑ Dark Surface (S7) (LRR G) ❑ High Plains Depressions (F16) (LRR H outside of MLRA 72 & 73) ❑ Reduced Vete (F18) ❑ Red Parent Materral (TF2) ❑ Very Shallow Dark Surface (TF 12) ❑ Other (Explain in Remarks) •Indicators of hydrophytic vegetation and wetland hydrology must be present, unless disturbed or problematic Restrictive Layer (if present) Type Depth (inches) Hydnc Soil Present, ® Yes ❑ No Remarks Hydnc soil indicator F6 is met HYDROLOGY Wetland Hydrology Indicators Pnmary Indicators (minimum of one required, check all that apply) ® Surface Water (A1) ® High Water Table (A2) ® Saturation (A3) ❑ Water Marks (B1) ❑ Sediment Deposits (62) ❑ Dnft Deposits (63) ❑ Algal Mat or Crust (B4) ❑ Iron Deposits (B5) ❑ Inundation Visible on Aeral Imagery (B7) ❑ Water -Stained Leaves (B9) ❑ Salt Crust (B11) ❑ Aquatic Invertebrates (B13) ❑ Hydrogen Sulfide Odor (C1) ❑ Dry -Season Water Table (C2) ❑ Oxidized Rhizospheres on Living Roots (C3) (where not tilled) ❑ Presence of Reduced Iron (C4) ❑ Thin Muck Surface (C7) ❑ Other (Explain in Remarks) Secondary Indicators (2 or more required) ❑ Surface Sod Cracks (B6) ❑ Sparsely Vegetated Concave Surface (68) ❑ Drainage Patterns (B10) ❑ Oxidized Rhizospheres on Living Roots (C3) (where tilled) ❑ Crayfish Burrows (C8) ❑ Saturation Visible on Aerial Imagery (C9) ® Geomorphic Position (D2) ® FAC-Neutral Test (D5) ❑ Frost -Heave Hummocks (D7) (LRR F) Field Observations Surface Water present, Water Table present, Saturation Present? (includes capillary fringe) Wetland Hydrology Present? Yes No ® ❑ ® ❑ 0 ® ❑ ® ❑ Depth (inches) 1 0 Describe Recorded Data (stream gauge, monitonng well, aenal photos, previous inspections, etc ), if available Remarks Hydrology indicators Al, A2, A3, D2, and D5 are met US Army Corps of Engineers Great Plains — Version 2 0 WETLAND DETERMINATION DATA FORM — Great Plains Regions Project/Site P125 Gravel Mine Applicant/Owner Raptor Materials Investigator(s) Mane Russo & Ashlee Caruana Section, Township, Range Section 29, T3N, R67W, 6th PM City/County Weld County Sampling Date 7/12/2024 State CO Sampling Point DP8 Landform (hdislope, terrace, etc ) Terrace Subregion (LRR) Western Great Plains Range & Irrigated Region Lat 40 195740 Long -104 911773 Datum NAD83 Soil Map Unit Name Aquolls and Aquents, gravelly substratum NWI Classification None Are climate/hydrologic conditions on the site typical for this time of year, Yes ❑ No (If no, explain m Remarks) Local relief (concave, convex, none) None Slope (%) 0 % Vegetation Soil Hydrology Significantly Disturbed? ❑ ❑ ❑ Naturally Problematic? ❑ ❑ ❑ Are "Normal Circumstances" present? E1 Yes ❑ No (If needed, explain any answers to Remarks) SUMMARY OF FINDINGS — Attach site map showing sampling point locations, transects, important features, etc Yes No Hydrophytic Vegetation Present? ❑ Hydnc Sod Present? ❑ Wetland Hydrology Present? ❑ Is the Sampled Area within a Wetland? ❑ IEJ Remarks Upland data point VEGETATION — Use scientific names of plants Tree Stratum (Plot size 30 ft ) 1 Absolute % Cover % Dominant Species, Indicator Status Dominance Test Worksheet Number of Dominant Species that are OBL, FACW, or FAC (excluding FAC-) 0 (A) 2 % % 3 - 4 % Total Number of Dominant Species Across All Strata 1 (B) 0 % = Total Cover Sapling/Shrub Stratum (Plot size 15 ft ) Percent of Dominant Species that are OBL, FACW, or FAC 100% (A/B) 1 % 2 % Prevalence Index Worksheet 3 % 4 % Total % Cover of Multiply by 5 % OBL species % x 1= 0 0 % = Total Cover FACW species % x 2 = 0 FAC species % x 3= 0 Herb Stratum (Plot size 5 ft ) FACU species % x 4 = 0 1 Pascopyrum smith, 100% % Y FACU UPL species % x 5= 0 2 Column Totals 0% (A) 0 (B) 3 % 4 % Prevalence Index = B/A = 5 % Hydrophytic Vegetation Indicators 6 % 7 % ❑ 1 Rapid Test for Hydrophytic Vegetation g % El2 Dominance Test is >50% 9 % ❑ 3 Prevalence Index is 53 0' 10 % 100 % = Total Cover El Morphological Adaptations' (Provide supporting data in Remarks or on a separate sheet) Woody Vine Stratum (Plot size 30 ft ) 1 ❑ Problematic Hydrophytic Vegetation' (explain) % % 0 % ' Indicators of hydrnc sod and wetland hydrology must be present, unless disturbed or problematic 2 = Total Cover Bare Ground in Herb Stratum 0 % Hydrophytic Vegetation Present? ElYes ® No Remarks US Army Corps of Engineers Great Plains — Version 2 0 SOIL Sampling Point DP8 Profile Description (Describe to the depth needed to document the indicator or confirm the absence of indicators ) Depth Matnx Redox Features (inches) Color (moist) % Color (moist) % Type' Loc2 Texture Remarks 'Type C=Concentration, D=Depletion, RM=Reduced Matnx, CS=Covered or Coated Sand Grains 2Location PL=Pore Lining, M=Matnx Hydnc Sod Indicators (Applicable to all LRRs, unless otherwise noted ) ❑ Histosol (A1) ❑ Sandy Gleyed Matnx (S4) ❑ Histic Epipedon (A2) ❑ Sandy Redox (S5) ❑ Black Histic (A3) ❑ Stnpped Matnx (S6) ❑ Hydrogen Sulfide (A4) ❑ Loamy Mucky Mineral (F1) ❑ Stratified Layers (A5) (LRR F) ❑ Loamy Gleyed Matnx (F2) ❑ 1 cm Muck (A9) (LRR F, G, H) ❑ Depleted Matrix (F3) ❑ Depleted Below Dark Surface (A11) ❑ Redox Dark Surface (F6) ❑ Thick Dark Surface (Al2) ❑ Depleted Dark Surface (F7) ❑ Sandy Mucky Mineral (S1) ❑ Redox Depressions (F8) ❑ 2 5 cm Mucky Peat or Peat (S2) (LRR G, H) ❑ High Plains Depressions (F16) ❑ 5 cm Mucky Peat or Peat (S3) (LRR F) (MLRA 72 & 73 of LRR H) Indicators for Problematic Hydnc Sods' ❑ 1 cm Muck (A9) (LRR I, J) ❑ Coast Prairie Redox (A16) (LRR F, G, H) ❑ Dark Surface (S7) (LRR G) ❑ High Plains Depressions (F16) (LRR H outside of NILRA 72 & 73) ❑ Reduced Vertic (F18) ❑ Red Parent Material (iF2) ❑ Very Shallow Dark Surface (TF 12) ❑ Other (Explain in Remarks) .Indicators of hydrophytic vegetation and wetland hydrology must be present, unless disturbed or problematic Restrictive Layer (if present) Type Depth (inches) Hydnc Soil Present? ❑ Yes ® No Remarks Sod sample not taken due to lack of indicators,of hydrophytic vegetation and wetland hydrology Hydnc sods are assumed absent HYDROLOGY Wetland Hydrology Indicators Primary Indicators (minimum of one required, check all that apply) ❑ Surface Water (A1) ❑ High Water Table (A2) ❑ Saturation (A3) ❑ Water Marks (B1) ❑ Sediment Deposits (B2) ❑ Dnft Deposits (B3) ❑ Algal Mat or Crust (B4) ❑ Iron Deposits (B5) ❑ Inundation Visible on Aerial Imagery (B7) ❑ Water -Stained Leaves (B9) ❑ Salt Crust (611) ❑ Aquatic Invertebrates (B13) ❑ Hydrogen Sulfide Odor (C1) ❑ Dry -Season Water Table (C2) ❑ Oxidized Rhizospheres on Living Roots (C3) (where not tilled) ❑ Presence of Reduced Iron (C4) ❑ Thin Muck Surface (C7) ❑ Other (Explain in Remarks) Second,/ Indicators (2 or more required) ❑ Surface Sod Cracks (B6) ❑ Sparsely Vegetated Concave Surface (B8) ❑ Drainage Patterns (B10) ❑ Oxidized Rhizospheres on Living Roots (C3) (where tilled) ❑ Crayfish Burrows (C8) ❑ Saturation Visible on Aenal Imagery (C9) ❑ Geomorphic Position (D2) ❑ FAC-Neutral Test (D5) ❑ Frost -Heave Hummocks (D7) (LRR F) Field Observations Depth Yes No (inches) Surface Water present? ❑ El Water Table present? ❑ El Saturation Present? ❑ El (includes capillary fnnge) Wetland Hydrology Present, ❑ Descnbe Recorded Data (stream gauge, monitonng well, aenal photos, previous inspections, etc ), if available Remarks No hydrology indicators are met US Army Corps of Engineers Great Plains — Version 2 0 USDA United States Department of Agriculture FRCS Natural Resources Conservation Service A product of the National Cooperative Soil Survey, a joint effort of the United States Department of Agriculture and other Federal agencies, State agencies including the Agricultural Experiment Stations, and local participants Custom Soil Resource Report for Weld County, Colorado, Southern Part October 23, 2024 Preface Soil surveys contain information that affects land use planning in survey areas. They highlight soil limitations that affect various land uses and provide information about the properties of the soils in the survey areas. Soil surveys are designed for many different users, including farmers, ranchers, foresters, agronomists, urban planners, community officials, engineers, developers, builders, and home buyers. Also, conservationists, teachers, students, and specialists in recreation, waste disposal, and pollution control can use the surveys to help them understand, protect, or enhance the environment. Various land use regulations of Federal, State, and local governments may impose special restrictions on land use or land treatment. Soil surveys identify soil properties that are used in making various land use or land treatment decisions. The information is intended to help the land users identify and reduce the effects of soil limitations on various land uses. The landowner- or user is responsible for identifying and complying with existing laws and regulations. Although soil survey information can be used for general farm, local, and wider area planning, onsite investigation is needed to supplement this information in some cases. Examples include soil quality assessments (http://www.nres.usda.gov/wps/ portal/nrcs/main/soils/health/) and certain conservation and engineering applications. For more detailed information, contact your local USDA Service Center (https://offices.sc.egov.usda.gov/locator/app?agency=nres) or your NRCS State Soil Scientist (http://www.nres.usda.gov/wps/portal/nres/detail/soils/contactus/? cid=nres142p2_053951). Great differences in soil properties can occur within short distances. Some soils are seasonally wet or subject to flooding. Some are too unstable to be used as a foundation for buildings or roads. Clayey or wet soils are poorly suited to use as septic tank absorption fields. A high water table makes a soil poorly suited to basements or underground installations. The National Cooperative Soil Survey is a joint effort of the United States Department of Agriculture and other Federal agencies, State agencies including the Agricultural Experiment Stations, and local agencies. The Natural Resources Conservation Service (NRCS) has leadership for the Federal part of the National Cooperative Soil Survey. Information about soils is updated periodically. Updated information is available through the NRCS Web Soil Survey, the site for official soil survey information. The U.S. Department of Agriculture (USDA) prohibits discrimination in all its programs and activities on the basis of race, color, national origin, age, disability, and where applicable, sex, marital status, familial status, parental status, religion, sexual orientation, genetic information, political beliefs, reprisal, or because all or a part of an individual's income is derived from any public assistance program. (Not all prohibited bases apply to all programs.) Persons with disabilities who require 2 alternative means for communication of program information (Braille, large pnnt, audiotape, etc ) should contact USDA's TARGET Center at (202) 720-2600 (voice and TDD) To file a complaint of discrimination, wnte to USDA, Director, Office of Civil Rights, 1400 Independence Avenue, S W , Washington, D C 20250-9410 or call (800) 795-3272 (voice) or (202) 720-6382 (TDD) USDA is an equal opportunity provider and employer 3 Contents Preface 2 How Sod Surveys Are Made 5 Soil Map 8 - Soil Map 9 Legend 10 Map Unit Legend 11 Map Unit Descriptions 11 Weld County, Colorado, Southern Part 13 1—Altvan loam, 0 to 1 percent slopes 13 3—Aquolls and Aquents, gravelly substratum 14 10 —Ellicott -Ellicott sandy -skeletal complex, 0 to 3 percent slopes, rarely flooded 16 13—Cascajo gravelly sandy loam, 5 to 20 percent slopes 18 27—Heldt silty clay, 1 to 3 percent slopes 19 41 —Nunn clay loam, 0 to 1 percent slopes 20 47 —Olney fine sandy loam, 1 to 3 percent slopes 21 51 —Otero sandy loam, 1 to 3 percent slopes 23 85 —Water 24 Sod Information for All Uses 25 Suitabdities and Limitations for Use 25 Land Classifications 25 Ecological Classification Name NRCS Rangeland Site (Cogburn Area Sods) 25 Farmland Classification (Cogburn Area Sods) 28 Ecological Sites 34 All Ecological Sites — (Cogburn Area Sods) 34 Map —Dominant Ecological Site (Cogburn Area Sods) 35 Legend —Dominant Ecological Site (Cogburn Area Sods) 36 Table —Ecological Sites by Map Unit Component (Cogburn Area Soils) 37 References 39 4 How S�o�cur y-ysAreMa x. Sod surveys are made to provide information about the sods and miscellaneous areas in a specific area They include a description of the soils and miscellaneous areas and their location on the landscape and tables that show soil properties and limitations affecting vanous uses Sod scientists observed the steepness, length, and shape of the slopes, the general pattern of drainage, the kinds of crops and native plants, and the kinds of bedrock They observed and descnbed many soil profiles A sod profile is the sequence of natural layers, or honzons, in a sod The profile extends from the surface down into the unconsolidated matenal in which the sod formed or from the surface down to bedrock The unconsolidated material is devoid of roots and other living organisms and has not been changed by other biological activity Currently, sods are mapped according to the boundaries of major land resource areas (MLRAs) MLRAs are geographically associated land resource units that share common characteristics related to physiography, geology, climate, water resources, sods, biological resources, and land uses (USDA, 2006) Sod survey areas typically consist of parts of one or more MLRA The soils and miscellaneous areas in a survey area occur in an orderly pattern that is related to the geology, landforms, relief, climate, and natural vegetation of the area Each kind of soil and miscellaneous area is associated with a particular kind of landform or with a segment of the landform By observing the sods and miscellaneous areas in the survey area and relating their position to specific segments of the landform, a sod scientist develops a concept, or model, of how they were formed Thus, dunng mapping, this model enables the soil scientist to predict with a considerable degree of accuracy the kind of sod or miscellaneous area at a specific location on the landscape Commonly, individual sods on the landscape merge into one another as their characteristics gradually change To construct an accurate soil map, however, sod scientists must determine the boundanes between the sods They can observe only a limited number of soil profiles Nevertheless, these observations, supplemented by an understanding of the sod -vegetation -landscape relationship, are sufficient to venfy predictions of the kinds of sod to an area and to determine the boundanes. Sod scientists recorded the characteristics of the sod profiles that they studied They noted sod color, texture, size and shape of soil aggregates, kind and amount of rock fragments, distnbution of plant roots, reaction, and other features that enable them to identify sods After describing the sods in the survey area and determining their properties, the soil scientists assigned the soils to taxonomic classes (units) Taxonomic classes are concepts Each taxonomic class has a set of sod characteristics with precisely defined limits The classes are used as a basis for companson to classify sods systematically Sod taxonomy, the system of taxonomic classification used in the United States, is based mainly on the kind and character of sod properties and the arrangement of horizons within the profile After the soil 5 Custom Soil Resource Report scientists classified and named the sods in the survey area, they compared the individual sods with similar sods in the same taxonomic class in other areas so that they could confirm data and assemble additional data based on experience and research The objective of sod mapping is not to delineate pure map unit components, the objective is to separate the landscape into landforms or landform segments that have similar use and management requirements Each map unit is defined by a unique combination of sod components and/or miscellaneous areas in predictable proportions Some components may be highly contrasting to the other components of the map unit The presence of minor components in a map unit in no way diminishes the usefulness or accuracy of the data The delineation of such landforms and landform segments on the map provides sufficient information for the development of resource plans If intensive use of small areas is planned, onsite investigation is needed to define and locate the sods and miscellaneous areas Sod scientists make many field observations in the process of producing a soil map The frequency of observation is dependent upon several factors, including scale of mapping, intensity of mapping, design of map units, complexity of the landscape, and experience of the soil scientist Observations are made to test and refine the sod -landscape model and predictions and to venfy the classification of the soils at specific locations Once the sod -landscape model is refined, a significantly smaller number of measurements of individual sod properties are made and recorded These measurements may include field measurements, such as those for color, depth to bedrock, and texture, and laboratory measurements, such as those for content of sand, silt, clay, salt, and other components Properties of each sod typically vary from one point to another across the landscape Observations for map unit components are aggregated to develop ranges of characteristics for the components The aggregated values are presented Direct measurements do not exist for every property presented for every map unit component Values for some properties are estimated from combinations of other properties While a sod survey is in progress, samples of some of the sods in the area generally are collected for laboratory analyses and for engmeenng tests Sod scientists interpret the data from these analyses and tests as well as the field -observed characteristics and the sod properties to determine the expected behavior of the sods under different uses Interpretations for all of the sods are field tested through observation of the sods to different uses and under different levels of management Some interpretations are modified to fit local conditions, and some new interpretations are developed to meet local needs Data are assembled from other sources, such as research information, production records, and field expenence of specialists For example, data on crop yields under defined levels of management are assembled from farm records and from field or plot expenments on the same kinds of soil Predictions about sod behavior are based not only on sod properties but also on such variables as climate and biological activity Sod conditions are predictable over long periods of time, but they are not predictable from year to year For example, sod scientists can predict with a fairly high degree of accuracy that a given sod will have a high water table within certain depths in most years, but they cannot predict that a high water table will always be at a specific level in the sod on a specific date After sod scientists located and identified the significant natural bodies of sod in the survey area, they drew the boundaries of these bodies on aenal photographs and 6 Custom Sod Resource Report Identified each as a specific map unit Aerial photographs show trees, buildings, fields, roads, and avers, all of which help in locating boundaries accurately 0� The soil map section includes the soil map for the defined area of interest, a list of soil map units on the map and extent of each map unit, and cartographic symbols displayed on the map Also presented are vanous metadata about data used to produce the map, and a description of each soil map unit 8 Custom Soil Resource Report Area of Interest (AOI) Area of Interest (AOI) Soils 001.40 MAP LEGEND Soil Map Unit Polygons Soil Map Unit Lines Soil Map Unit Points Special Point Features Blowout I2 X 1. r4t� r •Y 0 =sue a" tat'. ,� r • Borrow Pit Clay Spot Closed Depression Gravel Pit Gravelly Spot Landfill Lava Flow Marsh or swamp Mine or Quarry Miscellaneous Water Perennial Water Rock Outcrop Saline Spot Sandy Spot Severely Eroded Spot Sinkhole Slide or Slip Sodic Spot Spoil Area Stony Spot Very Stony Spot Wet Spot Other Special Line Features Water Features Streams and Canals Transportation III Rails Interstate Highways US Routes Major Roads Local Roads Background Aerial Photography MAP INFORMATION The soil surveys that comprise your AOI were mapped at 1:24,000. Warning: Soil Map may not be valid at this scale. Enlargement of maps beyond the scale of mapping can cause misunderstanding of the detail of mapping and accuracy of soil line placement. The maps do not show the small areas of contrasting soils that could have been shown at a more detailed scale. Please rely on the bar scale on each map sheet for map measurements. Source of Map: Natural Resources Conservation Service Web Soil Survey URL: Coordinate System: Web Mercator (EPSG:3857) Maps from the Web Soil Survey are based on the Web Mercator projection, which preserves direction and shape but distorts distance and area. A projection that preserves area, such as the Albers equal-area conic projection, should be used if more accurate calculations of distance or area are required. This product is generated from the USDA-NRCS certified data as of the version date(s) listed below. Soil Survey Area: Weld County, Colorado, Southern Part Survey Area Data: Version 23, Aug 29, 2024 Soil map units are labeled (as space allows) for map scales 1:50,000 or larger. Date(s) aerial images were photographed: Jun 8, 2021 Jun 12, 2021 The orthophoto or other base map on which the soil lines were compiled and digitized probably differs from the background imagery displayed on these maps. As a result, some minor shifting of map unit boundaries may be evident. 10 Custom Soil Resource Report M p Unit Legend Map Unit Symbol Map Unit Name Acres in AOI Percent of AOI 14.2 7.2°/a 1 Altvan slopes loam, 0 to 1 percent 108.9 55.5% 3 Aquolls substratum and Aquents, gravelly 15.4 7.8% 10 Ellicott complex, slopes, -Ellicott 0 to rarely sandy 3 percent flooded -skeletal 4.3 2.2% 13 Cascajo to gravelly 20 percent slopes sandy loam, 5 4.9 2.5% 27 Heldt slopes silty clay, 1 to 3 percent 41.4 21.1% 41 Nunn slopes clay loam. 0 to 1 percent 3.2 1.7°/o 47 Olney fine sandy percent slopes loam, 1 to 3 0.0 0.0% 51 Otero sandy percent slopes loam, 1 to 3 4.0 2.0`)/0 - 85 Water 196.4 100.0% Totals for Area of Interest Map Unit Descriptions The map units delineated on the detailed soil maps in a soil survey represent the soils or miscellaneous areas in the survey area. The map unit descriptions, along with the maps, can be used to determine the composition and properties of a unit. A map unit delineation on a soil map represents an area dominated by one or more major kinds of soil or miscellaneous areas. A map unit is identified and named according to the taxonomic classification of the dominant soils. Within a taxonomic class there are precisely defined limits for the properties of the soils. On the landscape, however, the soils are natural phenomena, and they have the characteristic variability of all natural phenomena. Thus, the range of some observed properties may extend beyond the limits defined for a taxonomic class. Areas of soils of a single taxonomic class rarely, if ever, can be mapped without including areas of other taxonomic classes. Consequently, every map unit is made up of the soils or miscellaneous areas for which it is named and some minor components that belong to taxonomic classes other than those of the major soils. Most minor soils have properties similar to those of the dominant soil or soils in the map unit, and thus they do not affect use and management. These are called noncontrasting, or similar, components. They may or may not be mentioned in a particular map unit description. Other minor components, however, have properties and behavioral characteristics divergent enough to affect use or to require different management. These are called contrasting, or dissimilar, components. They 11 Custom Sod Resource Report generally are in small areas and could not be mapped separately because of the scale used Some small areas of strongly contrasting sods or miscellaneous areas are identified by a special symbol on the maps If included in the database for a given area, the contrasting minor components are identified in the map unit descriptions along with some charactensttcs of each A few areas of minor components may not have been observed, and consequently they are not mentioned in the descriptions, especially where the pattern was so complex that it was impractical to make enough observations to identify all the soils and miscellaneous areas on the landscape The presence of minor components in a map unit in no way diminishes the usefulness or accuracy of the data The objective of mapping is not to delineate pure taxonomic classes but rather to separate the landscape into landforms or landform segments that have similar use and management requirements The delineation of such segments on the map provides sufficient information for the development of resource plans If intensive use of small areas is planned, however, onsite investigation is needed to define and locate the sods and miscellaneous areas An identifying symbol precedes the map unit name in the map unit descriptions Each description includes general facts about the unit and gives important sod properties and qualities Sods that have profiles that are almost alike make up a soil senes Except for differences in texture of the surface layer, all the sods of a senes have major horizons that are similar in composition, thickness, and arrangement Sods of one senes can differ in texture of the surface layer, slope, stoniness, salinity, degree of erosion, and other charactensttcs that affect their use On the basis of such differences, a sod series is divided into soil phases Most of the areas shown on the detailed sod maps are phases of soil senes The name of a soil phase commonly indicates a feature that affects use or management For example, Alpha silt loam, 0 to 2 percent slopes, is a phase of the Alpha series Some map units are made up of two or more major sods or miscellaneous areas These map units are complexes, associations, or undifferentiated groups A complex consists of two or more sods or miscellaneous areas In such an Intncate pattern or in such small areas that they cannot be shown separately on the maps The pattern and proportion of the sods or miscellaneous areas are somewhat similar in -all areas Alpha -Beta complex, 0 to 6 percent slopes, is an example An association is made up of two or more geographically associated sods or miscellaneous areas that are shown as one unit on the maps Because of present or anticipated uses of the map units in the survey area, it was not considered practical or necessary to map the soils or miscellaneous areas separately The pattern and relative proportion of the soils or miscellaneous areas are somewhat similar Alpha -Beta association, 0 to 2 percent slopes, is an example An undifferentiated group is made up of two or more soils or miscellaneous areas that could be mapped individually but are mapped as one unit because similar interpretations can be made for use and management The pattern and proportion of the soils or miscellaneous areas in a mapped area are not uniform An area can be made up of only one of the major soils or miscellaneous areas, or it can be made up of all of them Alpha and Beta sods, 0 to 2 percent slopes, is an example Some surveys include miscellaneous areas Such areas have little or no soil material and support little or no vegetation Rock outcrop is an example 12 Custom Soil Resource Report ,Al eld County, Colorado, Southern Part 1—Altvan loam, 0 to 1 percent slopes Map Unit Setting National -map unit symbol 3611 Elevation 4,500 to 4,900 feet Mean annual precipitation 14 to 16 inches Mean annual air temperature 46 to 48 degrees F Frost -free penod 130 to 150 days Farmland classification Not prime farmland Map Unit Composition Altvan and similar sods 90 percent Minor components 10 percent Estimates are based on observations, descriptions, and transects of the mapunit Description of Alb/an Setting Landform Terraces Down -slope shape Linear Across -slope shape Linear Parent matenal Old alluvium Typical profile H1 - 0 to 10 inches loam H2 - 10 to 25 inches clay loam H3 - 25 to 60 inches gravelly sand Properties and qualities Slope 0 to 1 percent Depth to restnctive feature More than 80 inches Drainage class Well drained Runoff class Low Capacity of the most bmitrng layer to transmit water (Ksat) Moderately high to high (0 20 to 2 00 in/hr) Depth to water table More than 80 inches Frequency of flooding None Frequency of ponding None Calcium carbonate, maximum content 5 percent Available water supply, 0 to 60 inches Low (about 5 7 inches) Interpretive groups Land capability classification Orngated) 3s Land capability classification (nonrrrrgated) 4e Hydrologic Sod Group B Ecological site R067BY002CO - Loamy Plains Hydnc sod rating No Minor Components Cascajo Percent of map unit 9 percent Hydnc soil rating No 13 Custom Sod Resource Report Aquic haplustolls Percent of map unit 1 percent Landform Swales Hydnc sod rating Yes 3— quoits and Aquents, gravely/ substratum Map Unit Setting National map unit symbol 3627 Elevation 4,000 to 7,200 feet Mean annual precipitation 12 to 18 inches Mean annual air temperature 45 to 55 degrees F Frost -free penod 80 to 155 days Farmland classification Pnme farmland if drained and either protected from flooding or not frequently flooded during the growing season Map Unit Composition Aquolls and similar sods 55 percent Aquents, gravelly substratum, and similar sods 30 percent Minor components 15 percent Estimates are based on observations, descriptions, and transects of the mapun►t Description of Aquolls Setting Landform Swales, flood plains, streams Down -slope shape Linear Across -slope shape Linear Parent matenal Recent alluvium Typical profile H1 - 0 to 48 inches loam H2 - 48 to 60 inches gravelly sand Properties and qualities Slope 0 to 3 percent Depth to restnctive feature More than 80 inches Drainage class Poorly drained Runoff class Low Capacity of the most limiting layer to transmit water (Ksat) Moderately high to high (0 20 to 2 00 in/hr) Depth to water table About 6 to 48 inches Frequency of flooding Frequent Frequency of ponding None Maximum salinity Nonsaline to slightly saline (0 0 to 4 0 mmhos/cm) Available water supply, 0 to 60 inches Moderate (about 8 0 inches) Interpretive groups Land capability classification Orngated) None specified Land capabilty classification (non►rngated) 6w 14 Custom Sod Resource Report Hydrologic Sod Group D Ecological site R067BY035CO - Salt Meadow Hydnc soil rating Yes Description of Aquents, Gravelly Substratum Setting Landform Stream terraces Down -slope shape Linear Across -slope shape Linear Parent matenal Recent alluvium Typical profile H9 - 0 to 48 inches variable H2 - 48 to 60 inches very gravelly sand Properties and qualities Slope 0 to 3 percent Depth to restnchve feature More than 80 inches Drainage class Poorly drained Runoff class Very high Capacity of the most limiting layer to transmit water (Ksat) Moderately high to very high (0 57 to 19 98 in/hr) Depth to water table About 6 to 24 inches Frequency of flooding Frequent Frequency of ponding None Calcium carbonate, maximum content 10 percent Maximum salinity Nonsaline to moderately saline (0 0 to 8 0 mmhos/cm) Available water supply, 0 to 60 inches Moderate (about 6 6 inches) Interpretive groups Land capability classification (►rngated) 6w Land capability classification (non►rngated) 6w Hydrologic Soil Group D Ecological site R067BY035CO - Salt Meadow Hydnc soil rating Yes Minor Components Bankard Percent of map unit 10 percent Hydnc soil rating No Ustic torrifluvents Percent of map unit 5 percent Hydnc sod rating No 15 Custom Sod Resource Report 10 —Ellicott -Ellicott sandy -skeletal complex, 0 to 3 percent slopes, rarely flooded Map Unit Setting National map unit symbol 2xsth Elevation 3,950 to 5,960 feet Mean annual precipitation 13 to 17 inches Mean annual air temperature 50 to 54 degrees F Frost -free period 135 to 165 days Farmland classification Pnme farmland if irngated and the product of I (sod erodibdity) x C (climate factor) does not exceed 60 Map Unit Composition Ellicott, rarely flooded, and similar soils 65 percent Ellicott sandy -skeletal, rarely flooded, and similar soils 25 percent Minor components 10 percent Estimates are based on observations, descnpbons, and transects of the mapunit Description of Ellicott, Rarely Flooded Setting Landform Drainageways, flood plains on intermittent streams Down -slope shape Linear Across -slope shape Concave Parent matenal Noncalcareous, stratified sandy alluvium Typical profile A - 0 to 4 inches sand AC - 4 to 13 inches sand C1 - 13 to 30 inches sand C2 - 30 to 44 inches sand C3 - 44 to 80 inches coarse sand Properties and qualities Slope 0 to 3 percent Depth to restnctive feature More than 80 inches Drainage class Excessively drained Runoff class Negligible Capacity of the most hmitmg layer to transmit water (Ksat) High to very high (13 00 to 39 96 in/hr) Depth to water table More than 80 inches Frequency of flooding Rare Frequency of ponding None Maximum salinity Nonsaline to very slightly saline (0 1 to 2 0 mmhos/cm) Available water supply, 0 to 60 inches Very low (about 2 1 inches) Interpretive groups Land capability classification Orngated) 4e 16 Custom Sod Resource Report Land capability classification (nonirngated) 7s Hydrologic Sod Group A Ecological site R067BY031 CO - Sandy Bottomland Hydnc sod rating No Description of Ellicott Sandy -skeletal, Rarely Flooded Setting Landform Channels on drainageways, channels on intermittent streams Down -slope shape Linear Across -slope shape Concave, linear Parent matenal Noncalcareous, stratified sandy alluvium Typical profile A - 0 to 4 inches very gravelly coarse sand AC - 4 to 13 inches very gravelly sand C1 - 13 to 30 inches very gravelly sand C2 - 30 to 44 inches very gravelly sand C3 - 44 to 80 inches very gravelly coarse sand Properties and qualities Slope 0 to 3 percent Depth to restnchve feature More than 80 inches Drainage class Excessively drained Runoff class Negligible Capacity of the most limiting layer to transmit water (Ksat) High to very high (13 00 to 39 96 in/hr) Depth to water table More than 80 inches Frequency of flooding Rare Frequency of ponding None Maximum salinity Nonsaline to very slightly saline (0 1 to 2 0 mmhos/cm) Available water supply, 0 to 60 inches Very low (about 1 2 inches) Interpretive groups Land capabddy classification Orngated) 4s Land capability classification (nonirngated) 8s Hydrologic Soil Group A Ecological site R067BY031 CO - Sandy Bottomland Hydnc sod rating No Minor Components Haverson Percent of map unit 10 percent Landform Terraces Landform position (three-dimensional) Tread Down -slope shape Linear Across -slope shape Linear Ecological site R067BY036CO - Overflow Hydnc sod rating No 17 Custom Soil Resource Report 'l3—Cascajo gravelly sanely loam, 5 to 20 percent slopes Map Unit Setting National map unit symbol 361n Elevation 4,600 to 5,200 feet Mean annual precipitation 11 to 13 inches Mean annual air temperature 52 to 54 degrees F Frost -free penod 120 to 160 days Farmland class►ficat►on Not prime farmland Map Unit Composition Cascajo and similar soils 85 percent Minor components 15 percent Estimates are based on observations, descnptrons, and transects of the mapun►t Description of Cascajo Setting Landform Terraces, ndges Down -slope shape Linear Across -slope shape Linear Parent matenal Calcareous gravelly alluvium Typical profile H1 - 0 to 9 inches gravelly sandy loam H2 - 9 to 31 inches extremely gravelly sandy loam H3 - 31 to 60 inches very gravelly sand Properties and qualities Slope 5 to 20 percent Depth to restnct►ve feature More than 80 inches Drainage class Excessively drained Runoff class Low Capacity of the most limiting layer to transmit water (Ksat) High (2.00 to 6 00 in/hr) Depth to water table More than 80 inches Frequency of flooding None Frequency of pond►ng None Calcium carbonate, maximum content 25 percent Maximum salinity Nonsaline to very slightly saline (0 0 to 2 0 mmhos/cm) Available water supply, 0 to 60 inches Low (about 41 inches) Interpretive groups Land capability classification (►rngated) None specified Land capability classification (non►rngated) 7s Hydrologic Sod Group A Ecological site R067BY063CO - Gravel Breaks Hydnc soil rating No 18 Custom Sod Resource Report Minor Components Renohill Percent of map unit 8 percent Hydnc soil rating No Samsil Percent of map unit 7 percent Hydnc sod rating No 27—Heldt silty clay, 1 to 3 percent slopes Map Unit Setting National map unit symbol 3624 Elevation 4,950 to 5,050 feet Mean annual precipitation 11 to 17 inches Mean annual air temperature 46 to 59 degrees F Frost -free penod 110 to 150 days Farmland classification Pnme farmland if irrigated and the product of I (soil erodibility) x C (climate factor) does not exceed 60 Map Unit Composition Heldt and similar sods 85 percent Minor components 15 percent Estimates are based on observations, descnpt►ons, and transects of the mapun►t Description of Heldt Setting Landform Plains Down -slope shape Linear Across -slope shape Linear Parent matenal Sediment alluvium derived from shale Typical profile H1 - 0 to 7 inches silty clay H2 - 7 to 60 inches silty clay Properties and qualities Slope 1 to 3 percent Depth to restnctive feature More than 80 inches Drainage class Well drained Runoff class Low Capacity of the most limiting layer to transmit water (Ksat) Moderately low to moderately high (0 06 to 0 20 in/hr) Depth to water table More than 80 Inches Frequency of flooding None Frequency of ponding None Calcium carbonate, maximum content 10 percent Gypsum, maximum content 1 percent 19 Custom Sod Resource Report Maximum salinity Nonsaline to slightly saline (0 0 to 4 0 mmhos/cm) Sodium adsorption ratio, maximum 10 0 Available water supply, 0 to 60 inches High (about 9 6 inches) Interpretive groups Land capability classification (►rngated) 3e Land capability classification (non►rngated) 4c Hydrologic Soil Group C Ecological site R067BY042CO - Clayey Plains Hydnc soil rating No Minor Components Nunn Percent of map unit 10 percent Hydnc sod rating No Haverson Percent of map unit 5 percent Hydnc soil rating No 41 —Dunn clay loam, 0 to 1 percent slopes Map Unit Setting National map unit symbol 2ting Elevation 4,100 to 5,700 feet Mean annual precipitation 14 to 15 inches Mean annual air temperature 48 to 52 degrees F Frost -free penod 135 to 152 days Farmland classification Pnme farmland if irrigated Map Unit Composition Nunn and similar sods 85 percent Minor components 15 percent Estimates are based on observations, descriptions, and transects of the mapun►t Description of Nunn Setting Landform Terraces Landform position (three-dimensional) Tread Down -slope shape Linear Across -slope shape Linear Parent matenal Pleistocene aged alluvium and/or eolian deposits Typical profile Ap - 0 to 6 inches clay loam Bt1 - 6 to 10 inches clay loam Bt2 - 10 to 26 inches clay loam Btk - 26 to 31 inches clay loam Bk1 - 31 to 47 inches loam 20 Custom Soil Resource Report Bk2 - 47 to 80 inches loam Properties and qualities Slope 0 to 1 percent Depth to restnctive feature More than 80 inches Drainage class Well drained Runoff class Medium Capacity of the most limiting layer to transmrt water (Ksat) Moderately low to moderately high (0 06 to 0 20 in/hr) Depth to water table More than 80 inches Frequency of flooding None Frequency of ponding None Calcium carbonate, maximum content 7 percent Maximum sahn►ty Nonsaline (0 1 to 1 0 mmhos/cm) Sodium adsorption ratio, maximum 0 5 Available water supply, 0 to 60 inches High (about 9 1 inches) Interpretive groups Land capability classification (►rngated) 3e Land capability classification (nonirngated) 4e Hydrologic Soil Group C Ecological site R067BY042CO - Clayey Plains Hydnc soil rating No Minor Components Heldt Percent of map unit 10 percent Landform Terraces Landform position (three-dimensional) Tread Down -slope shape Linear Across -slope shape Linear Ecological site R067BY042CO - Clayey Plains Hydnc soil rating No Wages Percent of map unit 5 percent Landform Terraces Landform position (three-dimensional) Tread Down -slope shape Linear Across -slope shape Linear Ecological site R067BY002CO - Loamy Plains Hydnc soil rating No 47—ODney fine sandy 6oam, 1 to 3 percent sVopes Map Unit Setting National map unit symbol 362v Elevation 4,600 to 5,200 feet Mean annual precipitation 11 to 15 inches Mean annual air temperature 46 to 54 degrees F 21 Custom Sod Resource Report Frost -free penod 125 to 175 days Farmland classification Pnme farmland if irrigated and the product of I (sod erodibdity) x C (climate factor) does not exceed 60 Map Unit Composition Olney and similar soils 85 percent Minor components 15 percent Estimates are based on observations, descnptnons, and transects of the mapunnt Description of Olney Setting Landform Plains Down -slope shape Linear Across -slope shape Linear Parent maternal Mixed deposit outwash Typical profile H1 - 0 to 10 inches fine sandy loam H2 - 10 to 20 inches sandy clay loam H3 - 20 to 25 inches sandy clay loam H4 - 25 to 60 ranches fine sandy loam Properties and qualities Slope 1 to 3 percent Depth to restnctive feature More than 80 inches Drainage class Well drained Runoff class Low Capacity of the most hmntmg layer to transmit water (Ksat) Moderately high to high (0 57 to 2 00 in/hr) Depth to water table More than 80 inches Frequency of flooding None Frequency of pondmg None Calcium carbonate, maximum content 15 percent Maximum salinity Nonsaline to very slightly saline (0 0 to 2 0 mmhos/cm) Available water supply, 0 to 60 inches Moderate (about 7 0 inches) Interpretive groups Land capability classification Orngated) 3e Land capability classification (nonnrngated) 4c Hydrologic Sod Group B Ecological site R067BY024CO - Sandy Plains Hydnc sod rating No Minor Components Zigweid Percent of map unit 10 percent Hydnc soil rating No Vona Percent of map unit 5 percent Hydnc sod rating No 22 Custom Soil Resource Report 51 —Otero sandy loam, 1 to 3 percent slopes Map Unit Setting National map unit symbol 3630 Elevation 4,700 to 5,250 feet Mean annual precipitation 12 to 15 inches Mean annual air temperature 48 to 52 degrees F Frost -free penod 130 to 180 days Farmland classification Pnme farmland if irrigated and the product of I (sod erodibility) x C (climate factor) does not exceed 60 Map Unit Composition Otero and similar sods 85 percent Minor components 15 percent Estimates are based on observations, descriptions, and transects of the mapunit Description of Otero Setting Landform Plains Down -slope shape Linear Across -slope shape Linear Parent material Eolian deposits and/or mixed outwash Typical profile H1- 0 to 12 inches sandy loam H2 - 12 to 60 inches fine sandy loam Properties and qualities Slope 1 to 3 percent Depth to restnctive feature More than 80 inches Drainage class Well drained Runoff class Very low Capacity of the most limiting layer to transmit water (Ksat) Moderately high to high (0 57 to 5 95 in/hr) Depth to water table More than 80 inches Frequency of flooding None Frequency of ponding None Calcium carbonate, maximum content 10 percent Maximum salinity Nonsaline to slightly saline (0 0 to 4 0 mmhos/cm) Available water supply, 0 to 60 inches Moderate (about 7 7 inches) Interpretive groups Land capability classification (irrigated) 3e Land capability classification (nonirngated) 4e Hydrologic Sod Group A Ecological site R067BY024CO - Sandy, Plains Hydnc soil rating No 23 Custom Soil Resource Report Minor Components Kim Percent of map unit 10 percent Hydnc soil rating No Vona - Percent of map unit 5 percent Hydnc sal rating No 85-1Nater Map Unit Composition _ Water 95 percent Minor components 5 percent Estimates are based on observations, descriptions, and transects of the mapunit i1limor Components ' Aquolls Percent of map unit 5 percent Landform Marshes Hydnc so►1 rating Yes 24 S®08 0nf®rmaff RI for Ag Uses 4) Suotabill foes and L°imitato oi ns for Use The Suitabtlities and Limitations for Use section includes various sod interpretations displayed as thematic maps with a summary table for the soil map units in the selected area of interest A single value or rating for each map unit is generated by aggregating the interpretive ratings of individual map unit components This aggregation process is defined for each interpretation Land C llassifoc, to 1} ns Land Classifications are specified land use and management groupings that are assigned to sod areas because combinations of sod have similar behavior for specified practices Most are based on sod properties and other factors that directly influence the specific use of the sod Example classifications include ecological site classification, farmland classification, irngated and nonirrigated land capability classification, and hydnc rating Ecological Chase facatlon Name: N CS Rangeland Site (C, ;gburn Area Soils) Ecological classifications consist of a serves of vegetative classification systems developed by vanous partners in the National Cooperative Sod Survey The classifications include, but are not limited to, systematic vegetative groupings Examples include NRCS ecological sites, United States Forest Service plant associations, and forage suitability groups The classifications systems are identified by the Ecological Classification Type Name field, which is in the Component Ecological Classification table 25 Custom Soil Resource Report Map —Ecological Classification Name: NRCS Rangeland Site (Cogburn Area Soils) r . r/ /t -� Custom Soil Resource Report MAP LEGEND Area of Interest (AOI) Area of Interest (AO') Soils Soil Rating Polygons j� Clayey Plains Gravel Breaks Loamy Plains Salt Meadow Sandy Bottomland Sandy Plains Not rated or not available Soil Rating Lines Clayey Plains ,,acits Gravel Breaks Loamy Plains Salt Meadow Sandy Bottomland 40-kssie Sandy Plains 0 * Not rated or not available Soil Rating Points Clayey Plains Gravel Breaks Loamy Plains Salt Meadow Sandy Bottomland 0 Sandy Plains ® Not rated or not available Water Features Streams and Canals Transportation H R Rails Interstate Highways US Routes Major Roads Local Roads Background Aerial Photography MAP INFO'' MATION The soil surveys that comprise your A01 were mapped at 1:24,000. Warning: Soil Map may not be valid at this scale. Enlargement of maps beyond the scale of mapping can cause misunderstanding of the detail of mapping and accuracy of soil line placement. The maps do not show the small areas of contrasting soils that could have been shown at a more detailed scale. Please rely on the bar scale on each map sheet for map measurements. Source of Map: Natural Resources Conservation Service Web Soil Survey URL: Coordinate System: Web Mercator (EPSG:3857) Maps from the Web Soil Survey are based on the Web Mercator projection, which preserves direction and shape but distorts distance and area. A projection that preserves area, such as the Albers equal-area conic projection, should be used if more accurate calculations of distance or area are required. This product is generated from the USDA -MRCS certified data as of the version date(s) listed below. Soil Survey Area: Weld County, Colorado, Southern Part Survey Area Data: Version 23, Aug 29, 2024 Soil map units are labeled (as space allows) for map scales 1:50,000 or larger. Date(s) aerial images were photographed: Jun 8, 2021 Jun 12, 2021 The orthophoto or other base map on which the soil lines were compiled and digitized probably differs from the background imagery displayed on these maps. As a result, some minor shifting of map unit boundaries may be evident. 27 Custom Soil Resource Report Table —Ecological Classification Name: MRCS Rangeland Site (Cogburn Area Soils) Map unit symbol Map unit name Rating Acres in AOI Percent of AOI 1 Alivan loam, 0 to 1 percent slopes Loamy Plains 14 2 7 2% 3 Aquolls and Aquents, gravelly substratum Salt Meadow 108 9 55 5% 10 Ellicott -Ellicott sandy- skeletal complex, 0 to 3 percent slopes, rarely flooded Sandy Bottomland 15 4 7 8% 13 Cascaio gravelly sandy loam, 5 to 20 percent slopes Gravel Breaks 4 3 2 2% 27 Heldt silty clay, 1 to 3 percent slopes Clayey Plains 4 9 2 5% 41 Nunn clay loam, 0 to 1 percent slopes Clayey Plains 41 4 21 1% 47 Olney fine sandy loam, 1 to 3 percent slopes Sandy Plains 3 2 1 7% 51 Otero sandy loam, 1 to 3 percent slopes Sandy Plains 0 0 0 0% 85 Water 4 0 2 0% Totals for Area of Interest 196 4 100 0% Rating Options —Ecological Classification Name' MRCS Rangeland Site (Cogburn Area Soils) Class NRCS Rangeland Site Aggregation Method Dominant Condition Component Percent Cutoff None Specified Tie -break Rule Lower Farr oland Classi$iica$u®n (C®gba.orn rea Soils) Farmland classification identifies map units as prime farmland, farmland of statewide importance, farmland of local importance, or unique farmland It identifies the location and extent of the soils that are best suited to food, feed, fiber, forage, and oilseed crops NRCS policy and procedures on prime and unique farmlands are published in the "Federal Register," Vol 43, No 21, January 31, 1978 28 Custom Soil Resource Report MAP LEGEND Area of interest (AO!) Area of Interest (AO!) Soils Soil Rating Polygons Not prime farmland All areas are prime farmland Prime farmland if drained Prime farmland if protected from flooding or not frequently flooded during the growing season Prime farmland if irrigated Prime farmland if drained and either protected from flooding or not frequently flooded during the growing season Prime farmland if irrigated and drained Prime farmland if irrigated and either protected from flooding or not frequently flooded during the growing season Prime farmland if subsoiled, completely removing the root inhibiting soil layer Prime farmland if irrigated and the product of I (soil erodibility) x C (climate factor) does not exceed 60 Prime farmland if irrigated and reclaimed of excess salts and sodium Farmland of statewide importance Farmland of statewide importance, if drained Farmland of statewide importance, if protected from flooding or not frequently flooded during the growing season Farmland of statewide importance, if irrigated Farmland of statewide importance, if drained and either protected from flooding or not frequently flooded during the growing season Farmland of statewide importance, if irrigated and drained Farmland of statewide importance, if irrigated and either protected from flooding or not frequently flooded during the growing season Farmland of statewide importance, if subsoiled, completely removing the root inhibiting soil layer Farmland of statewide importance, if irrigated and the product of I (soil erodibility) x C (climate factor) does not exceed 60 Farmland of statewide importance, if irrigated and reclaimed of excess salts and sodium Farmland of statewide importance, if drained or either protected from flooding or not frequently flooded during the growing season Farmland of statewide importance, if warm enough, and either drained or either protected from flooding or not frequently flooded during the growing season Farmland of statewide importance, if warm enough Farmland of statewide importance, if thawed Farmland of local importance Farmland of local importance, if irrigated i Farmland of unique importance Not rated or not available Soil Rating Lines Not prime farmland All areas are prime farmland Prime farmland if drained Prime farmland if protected from flooding or not frequently flooded during the growing season Prime farmland if irrigated A 0 Prime farmland if drained and either protected from flooding or not frequently flooded during the growing season Prime farmland if irrigated and drained Prime farmland if irrigated and either protected from flooding or not frequently flooded during the growing season 30 Custom Soil Resource Report • Prime farmland if subsoiled, completely removing the root inhibiting soil layer Prime farmland if irrigated and the product of I (soil erodibility) x C (climate factor) does not exceed 60 Prime farmland if irrigated and reclaimed of excess salts and sodium Farmland of statewide importance Farmland of statewide importance, if drained Farmland of statewide importance, if protected from flooding or not frequently flooded during the growing season ,a Farmland of statewide importance, if irrigated ocz,t. ode‘o Ole .it Farmland of statewide importance, if drained and either protected from flooding or not frequently flooded during the growing season Farmland of statewide importance, if irrigated and drained Farmland of statewide importance, if irrigated and either protected from flooding or not frequently flooded during the growing season • 0 Farmland of statewide importance, if subsoiled, completely removing the root inhibiting soil layer Farmland of statewide importance, if irrigated and the product of I (soil erodibility) x C (climate factor) does not exceed 60 001/40. Farmland of statewide importance, if irrigated and reclaimed of excess salts and sodium • Farmland of statewide importance, if drained or either protected from flooding or not frequently flooded during the growing season Farmland of statewide importance, if warm enough, and either drained or either protected from flooding or not frequently flooded during the growing season Farmland of statewide importance, if warm enough Farmland of statewide importance, if thawed Farmland of local importance Farmland of local importance, if irrigated �It 00 r r+ Farmland of unique importance Not rated or not available Soil Rating Points In O Not prime farmland All areas are prime farmland Prime farmland if drained Prime farmland if protected from flooding or not frequently flooded during the growing season Prime farmland if irrigated Prime farmland if drained and either protected from flooding or not frequently flooded during the growing season Prime farmland if irrigated and drained Prime farmland if irrigated and either protected from flooding or not frequently flooded during the growing season O In Prime farmland if subsoiled, completely removing the root inhibiting soil layer Prime farmland if irrigated and the product of I (soil erodibility) x C (climate factor) does not exceed 60 Prime farmland if irrigated and reclaimed of excess salts and sodium Farmland of statewide importance Farmland of statewide importance, if drained Farmland of statewide importance, if protected from flooding or not frequently flooded during the growing season Farmland of statewide importance, if irrigated 31 Custom Soil Resource Report ■ • 0 Farmland of statewide importance, if drained and either protected from flooding or not frequently flooded during the growing season Farmland of statewide importance, if irrigated and drained Farmland of statewide importance, if irrigated and either protected from flooding or not frequently flooded during the growing season Farmland of statewide importance, if subsoiled, completely removing the root inhibiting soil layer Farmland of statewide importance, if irrigated and the product of I (soil erodibility) x C (climate factor) does not exceed 60 • • Farmland of statewide importance, if irrigated and reclaimed of excess salts and sodium Farmland of statewide importance, if drained or either protected from flooding or not frequently flooded during the growing season Farmland of statewide importance, if warm enough, and either drained or either protected from flooding or not frequently flooded during the growing season Farmland of statewide importance, if warm enough Farmland of statewide importance, if thawed Farmland of local importance Farmland of local importance, if irrigated 0 Farmland of unique importance Not rated or not available El Water Features _ Streams and Canals Transportation g y Rails Interstate Highways US Routes Major Roads Local Roads Background Aerial Photography The soil surveys that comprise your AOI were mapped at 1:24,000. Warning: Soil Map may not be valid at this scale. Enlargement of maps beyond the scale of mapping can cause misunderstanding of the detail of mapping and accuracy of soil line placement. The maps do not show the small areas of contrasting soils that could have been shown at a more detailed scale. Please rely on the bar scale on each map sheet for map measurements. Source of Map: Natural Resources Conservation Service Web Soil Survey URL: Coordinate System: Web Mercator (EPSG:3857) Maps from the Web Soil Survey are based on the Web Mercator projection, which preserves direction and shape but distorts distance and area. A projection that preserves area, such as the Albers equal-area conic projection, should be used if more accurate calculations of distance or area are required. This product is generated from the USDA-NRCS certified data as of the version date(s) listed below. Soil Survey Area: Weld County, Colorado, Southern Part Survey Area Data: Version 23, Aug 29, 2024 Soil map units are labeled (as space allows) for map scales 1:50,000 or larger. Date(s) aerial images were photographed: Jun 8, 2021 Jun 12, 2021 The orthophoto or other base map on which the soil lines were compiled and digitized probably differs from the background imagery displayed on these maps. As a result, some minor shifting of map unit boundaries may be evident. Custom Soil Resource Report Table Farmland Classification (Cogburn Area Soils) Map unit symbol Map unit name Rating Acres in AOI Percent of AOI 1 Altvan percent loam, 0 to 1 slopes Not prime farmland 14.2 7.2% 3 Aquolls gravelly and Aquents, substratum Prime from farmland and either flooding frequently during season the if protected or flooded growing drained not 108.9 55.5% 15.4 7.8% 10 Ellicott skeletal 3 percent rarely -Ellicott flooded complex, slopes, sandy- 0 to Prime farmland irrigated product erodibility) factor) exceed of does 60 and I (soil x if the C not (climate 13 Cascajo loam, slopes gravelly 5 to 20 sandy percent Not prime farmland 4.3 2.2% 27 Heldt percent silty clay, slopes 1 to 3 Prime irrigated farmland product erodibility) factor) exceed of does 60 and I (soil x if the C not (climate 4.9 2.5% 41 Nunn clay percent loam, slopes 0 to 1 Prime farmland irrigated if 41.4 21.1% 47 Olney fine sandy to 3 percent slopes loam, 1 Prime irrigated farmland product erodibility) factor) exceed and of I does 60 (soil x if the C not (climate 3.2 1.7% 51 Otero sandy percent loam, slopes 1 to 3 Prime irrigated farmland product erodibility) factor) does exceed and of I 60 (soil x if the C not (climate 0.0 0.0% 85 Water Not prime farmland 4.0 2.0°/0 Totals for Area of Interest 196.4 100.0% Rating Options Farmland Classification (Cogburn Area Soils) Aggregation Method: No Aggregation Necessary Tie -break Rule: Lower 33 Custom Soil Resource Report Ecologica0 Sot S Individual soil map unit components can be correlated to a particular ecological site The Ecological Site Assessment section includes ecological site descriptions, plant growth curves, state and transition models, and selected National Plants database information All Ecological Sites o (Cogb rn Area Soils) An "ecological site" is the product of all the environmental factors responsible for its development It has characteristic soils that have developed over time, a characteristic hydrology, particularly infiltration and runoff, that has developed over time, and a characteristic plant community (kind and amount of vegetation) The vegetation, soils, and hydrology are all interrelated Each is influenced by the others and influences the development of the others For example, the hydrology of the site is influenced by development of the soil and plant community The plant community on an ecological site is typified by an association of species that differs from that of other ecological sites in the kind and/or proportion of species or in total production An ecological site name provides a general description of a particular ecological site For example, "Loamy Upland" is the name of a rangeland ecological site An "ecological site ID" is the symbol assigned to a particular ecological site The map identifies the dominant ecological site for each map unit, aggregated by dominant condition Other ecological sites may occur within each map unit Each map unit typically consists of one or more components (soils and/or miscellaneous areas) Each soil component is associated with an ecological site Miscellaneous areas, such as rock outcrop, sand dunes, and badlands, have little or no soil material and support little or no vegetation and therefore are not linked to an ecological site The table below the map lists all of the ecological sites for each map unit component in your area of interest 34 Custom Soil Resource Report MAP LEGEND Area of Interest (AOI) Area of Interest (AO!) Soils Soil Rating Polygons R067BY002CO R067BY024CO R067BY031 CO R067BY035CO R067BY042CO .R067BY063CO Not rated or not available Soil Rating Lines 46-.::.s# prig -7-90 R067BY002CO R067BY024CO R067BY031 CO R067BY035CO R067BY042CO 0060 R067BY063CO pi Not rated or not available Soil Rating Points a • R067BY002CO R067BY024CO R067BY031 CO R067BY035CO R067BY042CO R067BY063CO ® Not rated or not available Water Features Streams and Canals Transportation N R Rails vaisto Interstate Highways US Routes Major Roads Local Roads Background Aerial Photography MAP INFORMATION The soil surveys that comprise your AOI were mapped at 1:24,000. Warning: Soil Map may not be valid at this scale. Enlargement of maps beyond the scale of mapping can cause misunderstanding of the detail of mapping and accuracy of soil line placement. The maps do not show the small areas of contrasting soils that could have been shown at a more detailed scale. Please rely on the bar scale on each map sheet for map measurements. Source of Map: Natural Resources Conservation Service Web Soil Survey URL: Coordinate System: Web Mercator (EPSG:3857) Maps from the Web Soil Survey are based on the Web Mercator projection, which preserves direction and shape but distorts distance and area. A projection that preserves area, such as the Albers equal-area conic projection, should be used if more accurate calculations of distance or area are required. This product is generated from the USDA-NRCS certified data as of the version date(s) listed below. Soil Survey Area: Weld County, Colorado, Southern Part Survey Area Data: Version 23, Aug 29, 2024 Soil map units are labeled (as space allows) for map scales 1:50,000 or larger. Date(s) aerial images were photographed: Jun 8, 2021 Jun 12, 2021 The orthophoto or other base map on which the soil lines were compiled and digitized probably differs from the background imagery displayed on these maps. As a result, some minor shifting of map unit boundaries may be evident. 36 Custom Soil Resource Report Ira ble—Lcological Situ by Map Unit Component (Cogburn Area Soils) Map unit symbol Map unit name Component name (percent) Ecological site Acres in AOI Percent of AOI Altvan loam, percent slopes 0 to 1 Altvan (90%) R067BY002CO — 14.2 7.2% 1 Loamy Plains Cascajo (9%) Aquic (1%) Haplustolls Aquolls Aquents, substratum and gravelly Aquolls (55%) R067BY035CO - 108.9 55.5% 3 Salt Meadow Aquents, substratum gravelly (30%) R067BY035CO — Salt Meadow Bankard (10%) Ustic Torrifluvents (5%) Ellicott sandy complex, percent rarely -Ellicott -skeletal flooded slopes, 0 to 3 Ellicott, flooded rarely (65%) R067BY031 CO — 15.4 7.8% 10 Sandy Bottomland J Ellicott skeletal, flooded sandy- rarely (25°A) R067BY031 CO — Sandy Bottomland Haverson (10%) R067BY036CO — Overflow Cascajo sandy 20 percent gravelly loam, slopes 5 to Cascajo (85%) R067BY063CO — 4.3 2.2% 13 Gravel Breaks Renohill ° (8%) Samsil (7%) Heldt 3 silty percent clay, slopes 1 to Heldt (85%) R067BY042CO — 4.9 2.5% 27 Clayey Plains Nunn (10%) Haverson (5%) Nunn 1 clay percent loam, slopes 0 to Nunn (85%) R067BY042CO - 41.4 21.1% 41 Clayey Plains Heldt (10%) R067BY042CO — Clayey Plains Wages (5%) R067BY002CO — Loamy Plains Olney loam, fine sandy 1 to percent slopes 3 Olney (85%) R067BY024CO — 3.2 1.7% 47 Sandy Plains Zigweid (10°A) Vona (5%) Otero to slopes sandy 3 percent loam, 1 Otero (85%) R067BY024CO - 0.0 0.0% 51 Sandy Plains Kim (10%) Vona (5%) 37 Custom Soil Resource Report Map unit symbol Map unit name Component name (percent) Ecological site Acres in AOI Percent of AOI Water Water (95%) 4.0 2.0% 85 Aquolls (5%) Totals for Area of Interest 196.4 100.0% 38 References American Association of State Highway and Transportation Officials (AASHTO). 2004. Standard specifications for transportation materials and methods of sampling and testing. 24th edition. American Society for Testing and Materials (ASTM). 2005. Standard classification of soils for engineering purposes. ASTM Standard D2487-00. Cowardin, L.M., V. Carter, F.C. Golet, and E.T. LaRoe. 1979. Classification of wetlands and deep -water habitats of the United States. U.S. Fish and Wildlife Service FWS/OBS-79/31. Federal Register. July 13, 1994. Changes in hydric soils of the United States. Federal Register. September 18, 2002. Hydric soils of the United States. Hurt, G.W., and L.M. Vasilas, editors. Version 6.0, 2006. Field indicators of hydric soils in the United States. N ational Research Council. 1995. Wetlands: Characteristics and boundaries. Soil Survey Division Staff. 1993. Soil survey manual. Soil Conservation Service. U .S. Department of Agriculture Handbook 18. http://www.nres.usda.gov/wps/portal/ nres/detail/national/soi ls/?cid=nres 142p2_054262 Soil Survey Staff. 1999. Soil taxonomy: A basic system of soil classification for making and interpreting soil surveys. 2nd edition. Natural Resources Conservation Service, U.S. Department of Agriculture Handbook 436. http:// www.nres.usda.gov/wps/portal/nres/detail/national/soils/?cid=nres142p2_053577 Soil Survey Staff. 2010. Keys to soil taxonomy. 11th edition. U.S. Department of Agriculture, Natural Resources Conservation Service. http:// www.nres.usda.gov/wps/portal/nres/detail/national/soils/?cid=nres142p2_053580 Tiner, R.W., Jr. 1985. Wetlands of Delaware. U.S. Fish and Wildlife Service and Delaware Department of Natural Resources and Environmental Control, Wetlands Section. United States Army Corps of Engineers, Environmental Laboratory. 1987. Corps of Engineers wetlands delineation manual. Waterways Experiment Station Technical Report Y-87-1. U nited States Department of Agriculture, Natural Resources Conservation Service. N ational forestry manual. http://www.nrcs.usda.gov/wps/portal/nrcs/detail/soils/ home/?cid =nres 142 p2_053374 U nited States Department of Agriculture, Natural Resources Conservation Service. N ational range and pasture handbook. http://www.nres.usda.gov/wps/portal/nres/ detail/national/landuse/rangepasture/?cid=stelprdb1043084 39 Custom Soil Resource Report U nited States Department of Agriculture, Natural Resources Conservation Service. N ational soil survey handbook, title 430 -VI. http://www.nres.usda.gov/wps/portal/ nres/detail/soils/scientists/?cid=nres142p2_054242 U nited States Department of Agriculture, Natural Resources Conservation Service. 2006. Land resource regions and major land resource areas of the United States, the Caribbean, and the Pacific Basin. U.S. Department of Agriculture Handbook 296. http://www.nres.usda.gov/wps/portal/nres/detail/national/soils/? cid=nres 142p2_053624 U nited States Department of Agriculture, Soil Conservation Service. 1961. Land capability classification. U.S. Department of Agriculture Handbook 210. http:// www.nrcs.usda.gov/Internet/FSE_DOCUMENTS/nrcs142p2 052290.pdf 40 TABEL L - PREFERRED/PRIMARY and OPTIONAL SEED MIXTURES 2024 Seed Mix Calculator — ---------- IDIMMO ----- PROJECT: Coeburn Reservoir Tract: ALL Application: Initial STEP 1 " PRIMARY/PREFERRED SEED MIXTURE Critical AREA Planting STEP 2 STEP 3 11 Species - Scientific Nano; Species - Common Name Variety C/W Seeds/# pls , 43560 Seeds/st1.11.16-p,40 Seeds/sq.ft. 1 % Mix' # pis/acre ** 1 Slit S/Acre NOTES: l Panicunt virgatum Switchgrass Trailblazer W 389.000 8.93 4.48 0.20 0.9 S 13.52 $ 12.11 $ 44.26 2 Boutelorta curtipendula Sidcoats grama Vaughn W 191,000 4.38 9.12 0.20 1.8 S 24.26 $ 2.47 0.4 $ 6.42 3 Festuca °vino. Sheep fescue Covar C 680,000 15.61 2.56 0.15 $ 39.01 4 Achnathertnn hvmenoides Indian ricegrass Paloma C 141,000 3.2.1 12.36 0.15 1.9 $ 21.05 $ 5.55 5 Dorado:ea gracilis Blue grama Lovington W 825,000 18.94 2.11 0.10 0.2 $ 26.30 $ 4.76 6 Schizachyritan scopariunt Little bluest= Pastura W 260,000 5.97 6.70 0.05 0.3 $ 14.20 $ 0.41 7 Poa pratensis Kentucky bluegrass Livingston C 2,177,000 49.98 0.80 0.05 0.1 $ 4.10 $ 6.32 8 Thinapyrunt politician Tall whcatgrass Alkar C 79,000 1.81 22.06 0.05 1.1 $ 5.73 $ 1.57 9 13rontus inerinis Smooth brome Manchar 4 C 125,000 2.87 13.94 0.02 0.3 $ 5.63 $ 2.91 10 Sporabolus airoitles Alkali sacaton W 1,758,000 40.36 0.99 0.01 0.1 $ 29.10 $ 1.30 0.1 $ 13.00 1 I Sporobolus cryptandrtts Sand dropsecd W 5,298,000 121.63 0.33 0.01 $ 0.98 12 DValit:in fragifertan Strawberry clover O'Conner 300,000 6.89 5.81 0.01 0.1 $ 16.90 $ - 13 sec whcatgrass hybrid below for mulch 0 0.00 0.00 0.0 TOTALS = 1.00 5 121.65 Mulch Substitute Regreen 7" 1 WhcatXWhcatgrass Source = Granite Seeds & NRCS +• Minimum Mix Composition = 0.10 ttpis (all rounded to nearest tenth) OPTIONAL SEED MIXTURE 10 NOTE: Rates Shown are Drilled Rates. Where -broadcasting is necessary or preferred, Rates will double. Where possible (pis) Pure Live Seed cost are determined and sourced from local seed providers. Provider and Rates shown may vary Seasonally according to seed availability and related ask prices. Since species availability may vary, the operator may substitute species of similar utility. The species described are therefore subject to change without revision to the permit. Regreen Is a substitute for the use of mulch, providing live stabilization that will die out within three years as the native grasses begin to express themselves. Other options remain the discretion of the Operator. The Optional Seed Mixture Is intended only in the event of seeding establishment failure of the primary/preferred mixture based upon expression at or before the end of three years following the date of seed application. STEP 1* STEP 2 STEP 3 44 tr Species - Common Name Species - Scientific Name Variety C/W Seeds/## pis , 43560 Seeds/sq.ft. I @ 40 Seeds/sq.fl. 1 % Mixt # pis/acre ** 1 a/# $ I NOTES: 1 Agropyrott crisltaunt Crested whcatgrass Hycrest C 265,250 6.09 6.57 0.2 1.3 2 Pascnp} n nz smithii Western wheatgrass Arriba C 110,000 2.53 15.84 0.2 3.2 3 Lolitun perenne Perennial rycgrass Tetraploid C 227,000 5.21 7.68 0.2 1.5 4 Psatlzyroslacltus juncea Russian wildrye Swift C 175,000 4.02 9.96 0.2 2.0 5 Dactylis glonterata Orehardgrass Renegade C 427,200 9.81 4.08 0.1 0.4 6 Menton's afficinalis Yellow sweetclover 260,000 5.97 6.70 0.1 0.7 8 9 10 11 12 13 TOTALS -- _- t , RAPTOR MATERIALS LLC COGBURN SAND GRAVEL AND RESERVOIR PROJECT NOVEMBER 2024 A REGULAR IMPACT (112) CONSTRUCTION PERMIT APPLICATION - COLORADO DIVISION OF RECLAMATION MINING SAFETY OFFICE OF MINED LAND RECLAMATION DEPARTMENT OF THE ARMY U.S. ARMY CORPS OF ENGINEERS, OMAHA DISTRICT DENVER REGULATORY OFFICE, 9307 SOUTH WADSWORTH BLVD LITTLETON, COLORADO 801286901 CENWO-ODR-CO MEMORANDUM FOR RECORD December 17, 2024 SUBJECT: US Army Corps of Engineers (Corps) Approved Jurisdictional Determination in accordance with the "Revised Definition of `Waters of the United States', (88 FR 3004 (January 18, 2023) as amended by the "Revised Definition of `Waters of the United States', Conforming" (8 September 2023) , 1 NWO-2024-01795-DEN BACKGROUND. An Approved Jurisdictional Determination (AJD) is a Corps document stating the presence or absence of waters of the United States on a parcel or a written statement and map identifying the limits of waters of the United States on a parcel. AJDs are clearly designated appealable actions and will include a basis of JD with the document.z AJDs are case -specific and are typically made in response to a request. AJDs are valid for a period of five years unless new information warrants revision of the determination before the expiration date or a District Engineer has identified, after public notice and comment, that specific geographic areas with rapidly changing environmental conditions merit re -verification on a more frequent basis.3 On January 18, 2023, the Environmental Protection Agency (EPA) and the Department of the Army ("the agencies") published the "Revised Definition of `Waters of the United States,"" 88 FR 3004 (January 18, 2023) ("2023 Rule"). On September 8, 2023, the agencies published the "Revised Definition of `Waters of the United States'; Conforming", which amended the 2023 Rule to conform to the 2023 Supreme Court decision in Sackett v. EPA, 598 U.S., 143 S. Ct. 1322 (2023) ("Sackett"). This Memorandum for Record (MFR) constitutes the basis of jurisdiction for a Corps AJD as defined in 33 CFR §331.2. For the purposes of this AJD, we have relied on Section 10 of the Rivers and Harbors Act of 1899 (RHA),`' the 2023 Rule as amended, as well as other applicable guidance, relevant case law, and longstanding practice in evaluating jurisdiction. 1. SUMMARY OF CONCLUSIONS. 'While the Revised Definition of "Waters of the United States"; Conforming had no effect on some categories of waters covered under the CWA, and no effect on any waters covered under RHA, all categories are included in this Memorandum for Record for efficiency. 2 33 CFR 331.2. 3 Regulatory Guidance Letter 05-02. 4 USACE has authority under both Section 9 and Section 10 of the Rivers and Harbors Act of 1899 but for convenience, in this MFR, jurisdiction under RHA will be referred to as Section 10. CENWO SUBJECT: 2023 Rule, as amended, Approved Jurisdictional Determination in Light of Sackett v. EPA, 143 S. Ct. 1322 (2023), NWO-2024-01795-DEN a. Provide a list of each individual feature within the review area and the jurisdictional status of each one (i.e., identify whether each feature is/is not a water of the United States and/or a navigable water of the United States). i. AgDitch 1-27, non -jurisdictional 2. REFERENCES. a. "Revised Definition of `Waters of the United States,"" 88 FR 3004 (January 18, 2023) ("2023 Rule") b. "Revised Definition of `Waters of the United States'; Conforming" 88 FR 61964 (September 8, 2023) c. Sackett v. EPA, 598 U.S. 651, 143 S. Ct. 1322 (2023) 3. REVIEW AREA. The review area is located at a latitude of 40.195283, longitude of -104.909671, in Weld County, Colorado. It is identified as the jurisdictional determination area in Figure 2. 4. NEAREST TRADITIONAL NAVIGABLE WATER (TNW), THE TERRITORIAL SEAS, OR INTERSTATE WATER TO WHICH THE AQUATIC RESOURCE IS CONNECTED.5 None. 5. FLOWPATH FROM THE SUBJECT AQUATIC RESOURCES TO A TNW, THE TERRITORIAL SEAS, OR INTERSTATE WATER. N/A 6. SECTION 10 JURISDICTIONAL WATERS6: Describe aquatic resources or other features within the review area determined to be jurisdictional in accordance with Section 10 of the Rivers and Harbors Act of 1899. Include the size of each aquatic 5 This MFR should not be used to complete a new stand-alone TNW determination. A stand-alone TNW determination for a water that is not subject to Section 9 or 10 of the Rivers and Harbors Act of 1899 (RHA) is completed independently of a request for an AJD. A stand-alone TNW determination is conducted for a specific segment of river or stream or other type of waterbody, such as a lake, where upstream or downstream limits or lake borders are established. 6 33 CFR 329.9(a) A waterbody which was navigable in its natural or improved state, or which was susceptible of reasonable improvement (as discussed in § 329.8(b) of this part) retains its character as "navigable in law" even though it is not presently used for commerce, or is presently incapable of such use because of changed conditions or the presence of obstructions. 2 CENWO SUBJECT: 2023 Rule, as amended, Approved Jurisdictional Determination in Light of Sackett v. EPA, 143 S. Ct. 1322 (2023), NWO-2024-01795-DEN resource or other feature within the review area and how it was determined to be jurisdictional in accordance with Section 10.' N/A 7. SECTION 404 JURISDICTIONAL WATERS: Describe the aquatic resources within the review area that were found to meet the definition of waters of the United States in accordance with the 2023 Rule as amended, consistent with the Supreme Court's decision in Sackett. List each aquatic resource separately, by name, consistent with the naming convention used in section 1, above. Include a rationale for each aquatic resource, supporting that the aquatic resource meets the relevant category of "waters of the United States" in the 2023 Rule as amended. The rationale should also include a written description of, or reference to a map in the administrative record that shows, the lateral limits of jurisdiction for each aquatic resource, including how that limit was determined, and incorporate relevant references used. Include the size of each aquatic resource in acres or linear feet and attach and reference related figures as needed. a. Traditional Navigable Waters (TNWs) (a)(1)(i): N/A b. The Territorial Seas (a)(1 )(ii): N/A c. Interstate Waters (a)(1)(iii): N/A d. Impoundments (a)(2): N/A e. Tributaries (a)(3): N/A f. Adjacent Wetlands (a)(4): N/A g. Additional Waters (a)(5): N/A 8. NON -JURISDICTIONAL AQUATIC RESOURCES AND FEATURES a. Describe aquatic resources and other features within the review area identified in the 2023 Rule as amended as not "waters of the United States" even where they otherwise meet the terms of paragraphs (a)(2) through (5). Include the type of excluded aquatic resource or feature, the size of the aquatic resource or feature 7 This MFR is not to be used to make a report of findings to support a determination that the water is a navigable water of the United States. The district must follow the procedures outlined in 33 CFR part 329.14 to make a determination that water is a navigable water of the United States subject to Section 10 of the RHA. 3 CENWO SUBJECT: 2023 Rule, as amended, Approved Jurisdictional Determination in Light of Sackett v. EPA, 143 S. Ct. 1322 (2023), NWO-2024-01795-DEN within the review area and describe how it was determined to meet one of the exclusions listed in 33 CFR 328.3(b).8 AgDitch 1- 27 are lateral irrigation ditches used to flood irrigate the alfalfa fields. Based on the site visit, these ditches lack physical indicators of relatively permanent flow. In addition, the USGS topographic map and historic arial do not show that these ditches were constructed in aquatic resources. Therefore, AgDitch 1-27 are excluded under (b)(3), ditches (including roadside ditches) excavated wholly in and draining only dry land and that do not carry a relatively permanent flow of water. These ditches are not waters of the United States. b. Describe aquatic resources and features within the review area that were determined to be non -jurisdictional because they do not meet one or more categories of waters of the United States under the 2023 Rule as amended (e.g., tributaries that are non -relatively permanent waters; non -tidal wetlands that do not have a continuous surface connection to a jurisdictional water). N/A 9. DATA SOURCES. List sources of data/information used in making determination. Include titles and dates of sources used and ensure that information referenced is available in the administrative record. a. Site visit conducted December 13, 2024. b. USGS topographic map, 1949 Gowanda, CO, 1: 24,000 c. Google Earth, accessed December 13, 2024 d. USGS historic aerial, August 4, 1949 e. Determination Request for Approved Jurisdictional Determination for the P125 Gravel Mine, Weld County, Colorado, November 6, 2024 10.OTHER SUPPORTING INFORMATION. N/A 11. NOTE: The structure and format of this MFR were developed in coordination with the EPA and Department of the Army. The MFR's structure and format may be subject to future modification or may be rescinded as needed to implement 8 88 FR 3004 (January 18, 2023) 4 CENWO SUBJECT: 2023 Rule, as amended, Approved Jurisdictional Determination in Light of Sackett v. EPA, 143 S. Ct. 1322 (2023), NWO-2024-01795-DEN additional guidance from the agencies; however, the approved jurisdictional determination described herein is a final agency action. 5 Headgate PARCEL # PARCEL OWNER OF RECORD ADDRESS ADDRESS CITY STATE ZIP CODE STRUCTURES/ROW/EASEMENTS, BELOW 120929000026 ACORD ST VRAIN VALLEY RANCH LLC 7541 COUNTY ROAD 26 3/4 LONGMONT CO 80504-9514 120932000030 ACORD ST VRAIN VALLEY RANCH LLC 7541 COUNTY ROAD 26 3/4 LONGMONT CO 80504-9514 120929000025 ACORD ST VRAIN VALLEY RANCH LLC 7541 COUNTY ROAD 26 3/4 LONGMONT CO 80504-9514 120929400051 COLLINS ROBERT ALLEN 13187 COUNTY ROAD 17 PLATTEVILLE CO 80651-9105 120929000047 FIRESTONE TOWN OF 9950 PARK AVE FIRESTONE CO 80504-7820 120929000046 LG EVERIST INC 350 S MAIN AVE STE 400 SIOUX FALLS' SD 57104-6312 120929100050 PLATTEVILLE DAIRY LLC 1919 14TH ST STE 300 BOULDER CO 80302,321 120929200048 PLATTEVILLE DAIRY LLC 1919 14TH ST STE 300 BOULDER CO 80302-5321 120929200049 PLATTEVILLE DAIRY LLC 1919 14TH ST STE 300 BOULDER CO 80302-5321 120929000033 RAPTOR MATERIALS LLC 8120 GAGE ST FREDERICK CO 80516-9439 120933200003 RAPTOR MATERIALS LLC 8120 GAGE ST FREDERICK CO 80516-9439 120928000002 RAPTOR MATERIALS LLC 8120 GAGE ST FREDERICK CO 80516-9439 120929100052 RAPTOR MATERIALS LLC 8120 GAGE ST FREDERICK CO 80516-9439 120929200028 RAPTOR MATERIALS LLC 8120 GAGE ST FREDERICK CO 80516-9439 120929200051 RAPTOR MATERIALS LLC 8120 GAGE ST FREDERICK CO 80516-9439 120928000006 READY MIXED CONCRETE COMPANY 2500 BRANNAN WAY DENVER CO 80229-7029 120932101003 VARRA PASQUALE 8120 GAGE ST FREDERICK CO 80516-9439 RECEPTION #/ID OWNER STRUCTURE - EASEMENT- ROW ADDRESS ADDRESS CITY STATE ZIPCODE TELEPHONE # 18820017 WELD COUNTY DEPT OF PUBLIC WORKS CURTIS HALL, DIRECTOR P O BOX 785 GREELEY CO 80632 970-400-3750 X 3750 3806206 PANHANDLE EASTERN PIPE LINE COMPANY ATTN RIGHT OF WAY DEPT 8111 WESTCHESTER DR , STE 600 DALLAS TX 75225 800-275-7375 1629907 PANHANDLE EASTERN PIPE LINE COMPANY ATTN RIGHT OF WAY DEPT 8112 WESTCHESTER DR , STE 600 DALLAS TX 75226 800-275-7376 1663251 PANHANDLE EASTERN PIPE LINE COMPANY ATTN RIGHT OF WAY DEPT 6113 WESTCHESTER DR , STE 600 DALLAS TX 75227 800-275-7377 1832625 PANHANDLE EASTERN PIPE LINE COMPANY ATTN RIGHT OF WAY DEPT 8114 WESTCHESTER DR , STE 600 DALLAS TX 75228 800-275-7378 1961825 PANHANDLE EASTERN PIPE LINE COMPANY ATTN RIGHT OF WAY DEPT 8115 WESTCHESTER DR , STE 600 DALLAS TX 75229 800-275-7379 2550421 RESOURCE GATHERING SYSTEM, INC ATTN RIGHT OF WAY DEPT 1999 Broadway, Suite 3600 DENVER CO 80202 2402534 SNYDER OIL CORPORATION ATTN RIGHT OF WAY DEPT 777 MAIN ST, STE 2500 FORTH WORTH TX 706102 817-338-4043 2552512 HS RESOURCES, INC ATTN RIGHT OF WAY DEPT 3939 Carson EVANS CO 80620 303-296,600 2934956 KERR-MCGEE ROCKY MOUNTAIN COPORATION ATTN RIGHT OF WAY DEPT 1099 18th Street, Suite 1800 DENVER CO 80201 3623293 KERR-MCGEE GATHERING LLC ATTN RIGHT OF WAY DEPT 1099 18th Street, Suite 1800 DENVER CO 80202 3713895 WELD COUNTY DEPT OF PUBLIC WORKS CURTIS HALL, DIRECTOR P O BOX 785 GREELEY CO 80632 970-400-3750 X 3750 4077028 KERR-MCGEE GATHERING LLC ATTN RIGHT OF WAY DEPT 1099 18th Street, Suite 1800 DENVER CO 80202 4063155 KERR-MCGEE GATHERING LLC ATTN RIGHT OF WAY DEPT 1099 18th Street, Suite 1800 DENVER CO 80202 4083118 KERR-MCGEE GATHERING LLC ATTN RIGHT OF WAY DEPT 1099 18th Street, Suite 1800 DENVER CO 80202 LAST CHANCE DITCH 'LAST CHANCE DITCH COMPANY ATTN ANGIE SWANSON PO Box 119 LONGMONT CO 80502 BURIED LINE @ WCR 17 CITY OF THORNTON ATTN RIGHT OF WAY DEPT 9500 Civic Center Drive THORNTON CO 80229 720-997-6500 6f -ti., d J y f .1 LEGEND -- XXVX ..-, � ! Olpnlore f �' - �' -- EXISTING MAJOR CONTOUR EXISTING MINOR CONTOUR �'.� - �� Ii' - l -- I� BOUNDARY -APPROXIMATE r- L 4� , Imo-. • �-- ){ `'— - - �- `� a III �,..,•. ' --, �� Y y n •A •tA "- 200 FOOT BOUNDARY OFFSET -APPROXIMATE �- i � --r' �- _ s_ , 11•ar rY' 1.4 ' _ M 7•a- V al"' Ir rr �M R . r_. -_ emu. _..�.r_y_. r•'yta �� IM "4,1412,1111#40414 4 I. ,.a.-- - _ ..� —> --�• 1.• urn 5,.=1. Ma 1 V perm _ _/ a ≥ .r lrp+Y.cp .oJe, er,." . „�. I ? -• ". -121. 1" FENCE - - _ ' �, lir r • -- — _.......7. �► � _ -�...- '- � �: '1�4't. {��!s _ — ..� --• T ' _ - - _ _ 1 - -- EASEMENT LINE I r _ a o_r �r J' _ PIPE I / I�' I - RIGHT-OF-WAY LINE 5 K 120929200049 '. 1 ' i 1120029'100050 i I f PROPERTY LINE OVERHEAD UTILITY LINE ! J x 120929200048 w' STREET -EXISTING i.. � { I -_ CENTERLINE )1. 1 'Ir!M��?Ii(UIt1:?: .' , 1 / •_ . FLOODPLAIN �� F. S y . _rEu� � �' jJ / 71 i 7 - - • RIVERBANK r �i . ....__. _.,,�_ DITCH BOUNDARY J - t I•n / LAST CHANCE BITCH BOUNDARY _ _ - _ _ - _ 1 - y i $ -_ ry 'M r, SOIL UNIT LINE 'i--' - ICI ' or - '� ' Orr° DISTANCE BETWEEN FOUND PINS 1 ri. rl }' - _ .. WITNESS CORNER 5 z�e�•'' — :' f, r l tl __' r, FOUND ALIQUOT CORNER AS DESCRIBED } re ~ 'i1,'- '- �. �,I � S R7 . ,.� - w t.Tm. rse• l•,'a.•r' :•r�rt. Y - '.i•.� �• 4 011. .�uw.a.Es i t`.`alur , ",I In .\t_n, - - { '' - �•K•. w« wt. • �rr."i9r - 1 + I \ 4 o CALCULATED POSITION •. r s y/er.•. r $ as I , ; +r. *0 *A - — w tq+i�r• le FtIYl4? '.=,!f`�sauNe fs}'r5'sti • � * - �~, , " r 11r.y RI' rrs p,a*' � I '• 1 FOUND #6 RE8AR WITH 25" RED PLASTIC 1 TIC * 4 1 rJld rr,' / '. wow.awe't rata.,s — .qe�. I 'I I. r, �, -' s- '►% - f ' j �• :, CA r P LS 37971 N08°26'56 E 3.25' FROM • - 11 1 - -ro: Sal, _.� = I_ -� p _ • r; -'3e. ! _ ,l" !rr. •,�• ' res. r,mM Y ,,p, iI , 1 CALCULATED POSITION =alby 3 - .....-.0.-_7; f� �• .iJflailmutt i T.I..r•rLrulM1lr 'ataatw J -' ;. f, i+-+L r„' PRODUCING WELL HEAD tEararrlr'raa9.wfr�r t t � jj. J� • • rr a' APPROXIMATE PLUGGED & ABANDONED WELL iTT 9Yel I,xF3S jj • GracW*1f:c';, �'I l HEAD LOCATION — ••�•• /a - - - \i, 1 f I :.n. r1 �'1' j I ELECTRIC METER j' IIP L� 1 _ � 4' i wr ' r - vine; mu 1.•rtr7 r 2092820X '•-�'--�.-'Y 21•I —,.7x1'Ir2 i- I Y ,."r ra„ nr• `- +.'a` rw...'w1',rrr :: ,. '.ham• I c,x * 9 , rp t•I rri,.rsa n yy .1, , r' ,4 • / 's' '- t'r •ylI J / o h a fr �• .. I __ w •F _ • '1• €r ELECTRIC SERVICE POWER POLE Li(JA1 07S7f1i• 1.4 1 '' !" Is r.l'ul UlhsgZtZ9h'r•. icAI ! 19 WATER WELL - ". C{ - ' ` f ull •.Q4. _ `.lA�{r2...i'N..i'tit I,• - .. .r L, A � Y ,. + - „ Y:- 5[ d v _ » _ QIQC 1 Carr r' �' r�sl 711 k ti. -_ ° ..1. 4 WATER MARKER . E., �-- ! • -I.. ,r €r 4%119:In '�xbn" ', I _ e , ,s.., .aa 1 1?092°000047 ' ! 9 -; _ , • � id ��11' , d WATER METER •`Jf"' �' '-� �J ss��a' ti� liitwll"rlJr}/ IL; ]II- ,` _14 WATER VALVE _- ti ' 'aril.5 '1 �I r - ` f l' `1 GAS MARKER {71 + i I�; . Slit YAYIt L 18. _'1n � _ - I Y s41r1 f 1 , 5 ,` t s f I � .ft'' 1 GATE +..� 1/4 ? ;1! P' _ " _'ti, ' '� , _ i r Y E ,' Yf POST r. _ 11 I r...r.•ere+ r ,, �- �+ 1 -. ' _ ear t.nul ,• • , • '�r�'L'l? t I. • !� M I � 12Q�31' ... •� t -- - .t' ,1ry-,r��1\�. , • ey^� i .. •Ir3tu {yF ,., ,\ ' $r •._A I �' ryf •� ' ' _ r1�a,5E.'.e4"L , . '. ?ro Yrll paRrs R9•t. 'Items m, w. tJn. •a1d1 'Y. /,rrq .. earelm.rvl' j/ - F• ; ' 1 . ..I F t r i� i/ \ 1 uv I. in.'''. . M ''i f I I L r.7R'•. o11M 1 . r • k E. �l iq-� _•_ .'. ... r r� _ cI�•LJ L+.1 ..1 M1L . rr,yie�w' J y - ` .. _ l I ,_ ., ... 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'I'i1 - u . r' _ •'! � I -J �Iuyrca lewr[slr P Fli I hbitd+srr �. �� I J ' , I $WiL Iliesi -. -_ j r' , f' , / vi _ :F r. .. _ � r -' � _. i , eblgectlrint'tatr 120929100052 �� f b" i•; • - i iiI r.' , - W iati>rf +e a� ,i•'q I�IJ•N 0'.o- ..— 213 Xi rV� -' _ ,� .� --- r' is 'I .� - 5, ,1 ' '♦ ��• ly' yi I• a" 'i-,--: .. .1 -- Mil• fi r R -� a", :I I IL -1 ti, .,, .. • _'- ' ': V - rr9�lU .,. 1 — - •#:#.✓,tea+ 11 - ", ..:,' VL4i31 .. - __.. �r ,• '" -41 ' , r 1 • ,c.J'ai l�raf[!`i iA'ww`firh$t/ '.: • M164- '- i.1011•• I - a�''� .- 9] I.. it ,�,.-. p•sx-a ...n, •. • sr — r 'wit 1 IF J • y �a :,.: _ _�. • ♦ • •I. •� Y�I s. ql ,aV.I .. •'.1 '.I ` •'elMa+ws , .�-,y - _' "All' -'� ., _ ;st _ _ + 4t2t11F, .� 11 1 _-.r.r-1 �1rein �I - -�� "�..c. `,� i; ,: r'YA it - :k. r YI •`� -M _ -.....i...............- . ..a _. M , I f . �'.c ,1'.4! • • - '.�.• s� fir-, } �.yip•�'��•1, tl'k•1' ! i i :,•.r f J_ • • - — pl \i..C. ' ,.r " 7 . IJI -. 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' ''1•,I(fy) + F k- tb I' YJMwq,ll, ltlsttit Ap�lbtr]. NtrWYtpfdONEuLMillariWe'4W7�WIsnP4 �r,44gMm+�—.— ytifizt +w.i.wn xtia•.. 1 •�y{�/y q��r,�y y ll+ 1)03 � • f i b93210 l 1r' I iI f{j(( l u ' " VZ •4f i'� �f- 1: �1,y�� I IIIPP)Irgi. • 1 rlvwfli .Yp1fY1l Off en CAW .Y I' � ♦ 1. 11 i 1. 1 _ _ a . �{y�.l_ylq�••jj�y ('- ' ' �j !!! qIJ_/�' 12093 . i '1 1-',.3 •i n - �+ I r N,k1nY'. ,,r��t, i1 r �a',� _ K�-F �� , _ iilwlr0030 I � _ �/�,. _ y 4, •r' (r `.N,�„ .:. _ •T1 ~- 11 ' �.Lnii •• tf ma rat"T""r.� �w ��._ .rl�.� 1 -:ti 1I 1I, �,rf" T ' ' itJn'ri,l ., ''q_�: l A..� tJ" itl„P _R ..alifil . - rJ' •� • 011411. 4r�5a+�. 1010}.Ins] _ ^ , ' 11 -: S- , oirkit • 1•"y!/1.'y!{gia In4" 7 i44 Fti. Sla E'a+C Ffw, f 11.4 I'I 41,411•111 1 1' emr�J.., — P.,rli Il I I 1 wq �'1A e Y ' Y • ; 1' III 1 MI{�IR.� •MI1pgNPik r ' i _ < - I �l11+�ww77+�aog9o0gl e1Af.Ulay4 l P �t l'• raSi r, qU 4144 ON - - I WWI 9 lniacoot0 rlettatX Mll _,9. _raw Ill I • C 5.- _ ....GG�.... ' RI ,i - x-15 aa,.. ••, - e ,.� •i_. ,•!rav - - 1 r .5 _ ! • St:+U.� i H1'CM >a 3R70. fnali 4011 • Disotstr ogna ti by PeterMain PeterC6dy1En5Rn Christensen Date:2025.03.10 10:20:27 -06'00' RAPTOR MATERIALS, U -C, PROJECT, C o /miry.{ burn Sand l Gravel and Reservoir Project J e c t Aniiiiil ;'„' 4 Y; �DA•lt: LM �+la•t'ern9l�at '�{} '4' 0170 GAN ene r •� 030U005irk =•� t ( DRAWING: Exhibit C-1: Existing Conditions Map PAL* Or T --.1... PR°JECS Cogburn Sand, Crave! and Reservoir Pro °R""""G Exhibit C-2: Extraction Plan Map fact MOWS: Ulylt�Iggnaa b, Peter Nte,cluhtknuo Christensen Date:2025.03.05 20:02:15 -07'00' wittr: t fria � _ 0 nett OA11 0 01 Nov rribr 14324 RAPTOR µATERIALS, LLC. glib CECE STREET EESEEnitn, COLC:1A']0 lilP'iIC_ ('Al) DC e..E957 533155 - PROJECT. Cogburn Sand, Gravel and Reservoir Project DRAWING: Exhibit F: Reclamation Map Plan 333292- 333153 - DEVELOPED WATER RESOURCES WITH GRASS EMBANKMENTS f r 4124-F 318477- 299543 - P-125 S1 NOTES: LEGEND Peter tot& oveterwinn Christensen Date:2025,03 05 0°:10:55 -O7 CO EXIS1 ING h1AJOR CONTOUR EXISTING MINOR CONTOUR PROPOSED MAJOR CONTOUR PROPOSED MINOR CONTOUR BOUNDARY -APPROXIMATE 200 FOOT BOUNDARY OFFSET -APPROXIMATE FENCE EASEMENT LINE DISCHARGE PIPE RIGHT-OF-WAY LINE STREET - EXISTING CENTERLINE FLOODPLAIN FLOOD ZONE A FLOOD ZONE AE FLOOD ZONE X EXTRACTION LIMITS INITIAL AREA OF EXTRACTION WATER -FILLED AREA BACKFILLED CONVEYOR PIT WATER LEVEL LAST CHANCE DITCH BOUNDARY RIVERBANK DISTANCE BETWEEN FOUND PINS WITNESS CORNER FOUND ALIQUOT CORNER AS DESCRIBED CALCULATED POSITION FOUND #5 REBAR WITH 1 25" RED PLASTIC CAP LS 379'71 N08°26'56" E 3 25' FROM CALCULATED POSITION PRODUCING WELL HEAD APPROXIMATE PLUGGED & ABANDONED WELL HEAD LOCATION GATE POST WATER WELL OIL OR GAS WELL ABANDONED OIL_ OR GAS WELL 9GISLEc I it m c fat tent DATE: 01 November 2024 RCIFITA0N: PACE 1 OF 1 ,. 4 f `� '__�Ilr`� �' ��1'• LEGEND .�' •�_ - �I r ir • -3� 1 fj �•♦' I II I �D r „ .x. �} I - ' I i , EJ• `' ` • ' 1, '' • ' i _ ' f , . - - t _ ,i , 1.41 i}lT nr?r0 CR•1 ROIL n _ '_ - A. '�,} 3• "� y� rC 1 1 t l ♦� . ...� !1 �' — - - ..I(1i?l,Y -- EXISTING MAJOR CONTOUR EXISTING MINOR CONTOUR ' 1' t ; , • R �< l -74.�,� X'1f+ i PROPOSED MAJOR CONTOUR � - b- .. � k �y-�.e....�,4 - �4 II #PA n , � ..-.: , - PROPOSED MINOR CONTOUR re ^, _ ,. a r� #2{1929200028 I�TOR"iii1TERIALS LLC ,u , PAf�t.CL NO. M�,UD?rJlOlitJ3r w- BOUNDARY -APPROXIMATE �IIf '+r MI WILL f+'APTUFt MATERIALS 1AL8110 200 FOOT BOUNDARY OFFSET -APPROXIMATE rE l 's. 8120 GAGE 5T,, FREDERICK, FiU,t ltb ` .« PARCEL N[2. 120L12900I}433 �: „ • " ' i 8114 GAGE ST„ Ff�kE[?R1CIfi, CO, 80516 '.. i .• .• " FENCE 1 •. if . .- _: - t _ f11Fy'rC1R MATER6ALS I.Lr0 i • _ v ; I P 8120E sr.. FREDERICK. Co. e518 - Tlr9ER111 Y ENE Y._�. _ r AOnJ,sry v./Lim-of7(ri= %pjl `~ " s t'I ^ _t N. .'�'' t r PARCEL BOUNDARY •3 — 3•4. .. I �`-Q1lc j - ! DISGHARGEPIPE t f_ 'alOW II RIGHT-OF-WAY LINE ' �� •-e\NIr. PIA E1 '. r3•:. nh'CYX7�? 141'u's.21�4 Ex Q Col'1-i.irbU � / f � /� I St`� r • �1 �• ` - - - -- — STREET - EXISTING 1 - rKIRi"r'.rlia —C'Iti11';Ls NW I L -'CENTERLINE I t' ,.+ •_ •irncs: .. fT 3- _ -.. /0/ 1 ` - 1 _ 1 1 -- aniiiE-.I0151a 1s39t1, I333153- a . • '� •. y /�. psiiop Y � � PLOODPLAIN 1 . f • I . _ -, s }/ f .�1F1_ 2,--a . MW -2 7025 0°1 %� f � •r' + , • • . ► f '— �� Iii FL. FLOOD ZONE A 4 '.3- us R i`C067iC+f7M�1�f, GROUND -4787.04 )r) r.. - VISICIXiitAttYi f `� ty t .�^r' �._ tit TOP P'U E=-+Ot97.5t •�: ' -' _ •� , _ llfF�pps �asY�'?'µ _}r . .« �' I FLOOD ZONEA E - I:3•.: s - { 1 f A �= , , r t.rlt - Rw i3f�T;'}11iyaisytm t` -"3r? Ink .,rl.wr+tuoe, � 1I J l: �a7� FLOOD ZONE X •• �y IC . Y e '.� Jl �. / ► SOIL UNIT LINE 1 y _ - 1. IJ.X`-.,, Ark -a o.,:i IR! i “, 1'� • EX7It4CTlON LIMITS f - . 1.=7 1 J f I #:��*4�1��i�� BACKFILLED y r _ / ^` `{ti / 1 = t �/ �� /19 ! CONVEYOR ' iter , �. tilt � �. _ — ''6^“-- PIT WATER LEVEL 1- - �. /f f ,. �...�_.� .� �- e DITCH BOUNDARY . ." ' —. �y7•, / i PARCEL NO. + --____---- --- LAST CHANCE DITCH BOUNDARY f/ SECC,X t' 120929200028 - 1,1 -I° t tisi RAPTOR MATERIALS I j • LIE =RE t/,/�• • r' "i I - / TEMPORARY TOPSOIL STOCKPILE RIVERBANK ` r' ` • LLC V �" `"'"- f + f 8120 GAGE FREDERICK ST„ CO, y, .' ; ' -•_ 0465% �•v•• 4. f`• ' , `=. ' rJ alt r V>rl DISTANCE BETWEEN FOUND PINS 43 WITNESS CORNER - tei ALL . I. ILL at, 80516 - �- .� '. CORNER • •� , -- • FOUND ALIQUOT AS DESCRIBED 44444. , ,� —• I -.__ _ iii......- �F �"� if >t it r<I - o CALCULATED POSITION _y y n- , � :j 6 ry7. r� <L •S •• _ kA _y, �' 1`+ f yixte ( y + 1/41 1 , - ' i FOUND #5 REBAR WITH 1 25" RED PLASTIC • CAP LS 37971 N0B°26'56" E 3,25' FROM ° .. ' • ,�. 4 ; x : ..; 3152- - F_ �+.-----1 CALCULATED POSITION , - .�4^.�.=i ; yr - �— • P b:Y yl MW -1 7023 I +' ice+ r - :•-` f +I - o.3• f ,r r PRODUCING WELL HEAD I I ; + `� ',a?f a GROUND=4797,04 ....A„...... .33•1. ° � A� , I I !k TOPI'i+F14189 sA.::: , ABANDONED WELL 1 OCATIONLUGGED 8 � HEAD y ry! — 7 I. x- fr, .+ r' f r t I •— GATE I } y s }.i c o f .e i �'i W POST sit,3 t�` °• • *� ' 0 WATER WELL 1 g :e iff 1 P -125B SURFACE WATER e ': - 1 H, 4 -1 AREA = 31 98 ± ACRES ! 1.'' f_ •' , Ce OIL OR GAS WELL - A. r r" Ie AT ELEVATION 4782' ._3•_f , D ;' �'_ y M '`�. it 4i- ABANDONED OIL OR GAS WELL •3•r. _e l �a• f+. r 1 .,. , cirY ^,,r f, • • — lit _ .,� 8• f f y ,�, - _ r. 1 - - '� '✓ . • i � . fA e r 7 t�q�; A F'>JI u w 1+1G1A%«111.hfGtfJS1/ .1 r .y/ • ---N\ - '' •` � '.---c..1 _ ,%— t P -125B = 38.31 ± ACRES . - •r ,! . � f .e.�ail y. i r r kr — . • ' N � • f (41,..1•344t.',„, _ ` r/ r r ��' +' • " 'f — '�. I.: _ r' 13•.'1 U".,.•r —` `-"^i .r3• { r M•r. 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'a" — —A- - - r:r n /' r Y > — / . \ r 1 I Gf -3•:i fl i! ! •-,.•.� <• �+ V �' l'�tl GlLahli2.fi.Gi I ti .f(„ yy _ -II _ fil. .-� w �•ti ti++ �. y� , rf. .f• y -- -- s- 4 ` } �'' r•te..'' - - , TO BE BACKFILLED — � -- - +� f�`?a-a� «;+•e � 1 I �,1• _ f►+ w %WhistWel1 FOLLOWING � 'S _• ~ Dntolia 1 s�t.•L�tdL'* }!►!} ••` •• 4 „., M - Permit Number 1,O1tede Longitude Owner Permit Slants Canstudlort Dots Perm II CatinCory U994s) ' P-125_51 '4 $ ,�. 4 4.47 = 10.40± ACRES +. 3331'66- 40.149438 -104.91�J3& RAPTOR MATERIALS LLC IV'ARRA GARRETT 1 Welt tCansltartlttd 3,2023 MooftonagiObse Wean IdonlIONTVSAMptinp � ;4 rr * ♦ ♦�4, % J.1P/4'y•"r �# 315477- 40.1U17� YMIXEDCONCRETECOMPANY WellConetoeted' BP111201aMoolltelnigtObteraiion . I.t -t(1..PO4IBBR Mon11wNlg#3rmnitnp �i'�'�¢t�'f; 0+• _ ,z ♦ 4 I•* 333154• +10 19455•{ -10414361'1 RAPTOR MATERIALS. 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JC13£PH) Well Conslru+rd 6)118 [AolulloTinQietvelioe 1ltottiitolinplF,omplftip a,.- ti # y+lj��►�}�r�$;4��i ,� 4 4. 4 ♦ i, � �d ;, �@ � l •�� ba.4i,_.,f$�t,�iEni.��i4�; 333294- 40.18876'0 -104,911601 ENSOLUMtTNOMAS, DANIEL) Wet Constructed 1311.2029 PAontloring�It?hsereetion Moodotingcaroplinp rr. ab r � , i r __ � tL��s - IV1 � 299543 � � ' - � - �q'T • 333295- d CI, 108724 -104411832 OCCIDENTAL PETROLEUM IRIfiMER, JOSEPH) Well Constructed 81112412"3 MorttlortrigrObsetvation bloortorinfloropling :- .=- . � ; ° �--'I - L f • — .r,,. , �-•- . =ly�.a `. :7�M5 • - •J_��y✓' '•., `' T_-\ PA' I' ' •`' ' 3.1311: � —1:- ,,y 7s . L . r T'T • 333296- 40.197606 -104811760 OCCIDENTAL PETROLEUM (RIEMER,JosepH1) Well Cane vera°d 81112023 MondlolringlObsereedon Montter'sngiSerinplin4 =-.-.. elx.ti°11=�+_vr:� _ MW -1,07. -. . - � f` fr MW -57019 _ •� ' _ OJfiOUf[D•a199 ba - 31•3155• 40.149402 RASIOR 61AT'ER1A1.S. GARRETT) Nell C+ghttructed _ - 1 1 -101,9145.80 LI,C (VARRA. 11•'272+7023' 6lenilotmgtObsstvetion )dolniaHng+SamplI g GROUND=4Booaa _ , ` - . f 774 1't1°E•tlO9L91 +t'1 . 25967 -F -R 40,201870 -104.9141) 3 COLORADO DAIRY FARMS Wed Constructed ; 31{11842 General Purpose Block TOP VINEI ': 11 i -- _ �, - � t � ,,;e t,, ' -�� _ _ - . — �_ 4 � __ _ � . 299543- 40,189339 -104 17039EO VA RRA COMPANIES INC (4"ARRAGARAETT) Wen Constructed 8-16121713 MlonHoringrObservatlon MonitoringSempltng i � _ � , _ �"� ,'; — - I � - - 4124.F 40:193.402 -104:404336 VA CtritA COMPANIES INC RRA_GARRETT3 Wed Constructed 40'1963 Geiser -it Purpose 3j _ 1 4WA tnrtpatlan �.. — , - ` � +15973- 40,163896 -104:'902281 RALPH NIX PRODLIOE, INC Well Construate•d S4 101$909 Resklanlfsl -' � _ 1'1� L?ptrpstlr - •., _ , 7 7 1� E' Ill _ - •.. e - — 1 239442-A ' 40 t6!v725 -104 902234 READY M1,%ED CONCRETE COMPANY LLC MARVEL JR, J C) WW1 Constructed 1112+3002 R°kciarKiat Dorneitio ., ": t ' � ti I � _�`' 1 s — �RMAT RAPTOR MATERIALS, ILC. FREDOR0`°°°°"' 1FLEPNOXC(SOS) tOt-e•51 110+41: T Inch es *00 Nig PROJECT. Cogburn Sand, Gravel and Reservoir Project _ H41ES: Peter ��'"�4 POIL+r {1kiYV0NtOrM Christensen Date: 2025.03.05 09:12:06-07'0V ° �1�� 'Di1'Tt r}� ETd'41�rrtDRN' �I+ ItMv>81aI: °R""""G° Exhibit G: Water Information Map �r Mai -.1.-Or 1 -; 120029200(tit t 4 41 "Val eCCPIS 120929000026 120929000046 a ri.,cl 4 -11:.;• stga 7M ssr 1 fr n r7 • r � l' Sat ati 1,14.2•1 , tin., I Ng0. worn Cows rfrfdll7 Y •'-^• am - TT r8l', 0 r 1 r 1 r a_ 1 LEGEND - .41.14t . tee. Orir1 EXISTING MAJOR CONTOUR EXISTING MINOR CONTOUR BOUNDARY -APPROXIMATE FENCE EASEMENT LINE PROPERTY LINE OVERHEAD UTILITY LINE STREET - EXISTING CENTERLINE FLOODPLAIN SOIL UNIT LINE DITCH BOUNDARY LAST CHANCE DITCH BOUNDARY WETLANDS DISTANCE BETWEEN FOUND PINS ® WITNESS CORNER 0 FOUND ALIQUOT CORNER AS DESCRIBED O CALCULATED POSITION FOUND 1$5 REBAR WITH 1.25" RED PLASTIC ▪ CAP LS 37971 N0S°26'56" E 3 25' FROM CALCULATED POSITION GATE w POST s— L61r tat 11111111 `itko 111 PAW Or01111r1t VIMI[IHl 1F+:+ 4 trot kola* TO a 1tlOliria.C'ti 41J Il'4 1 1 Stiall100.4si el, Ciertt11' 1Vdt MI VAI it 1S M iiiO211l16O2TT O+AWPOtl[I% Castl.Lk 11 TO 1 rWs as V.tet1 Ittatty IIVA,iglp 711 I' in, 13 abta*Oll Miltr WMJ1 kale. 1 TON firIMUNf%%On L 11 7J'S 1p locum an Lill#. I VO 1 M rani Marti • 1 71N. ml m1.1l1ONI ttlltf 0 u71 ratkilk 4Cd17 III Pi mS 'UMl rant WitlrlOnk 6 {Ce1 /IPEISI Stitt II ill l rx If II !0 IOW RAANOII IOW b 1111 rtrlta Sort' n 11\ If. Rallis so 1t MIAs 1.194 MSJi or WWII! Ili l I-A :IS RAPTOR MATERIALS, LLC. 9120 GA07 STi2Et 708571504, COICRA0O 00531 TET�IIGSL• I3D31486-0657 PROJECT DRAINING: Exhibit IIJ: Soils & Vegetation Map Cogburn Sand, Gravel and Reservoir Project WAIL 1 inch 2100 fa t NOTES: Wally allys{gdrddry 11RrCh151emeti Christensen Date:2°25.03.U5 D9:12.57 -07'00' ATEcn Muvortbor OFFT I COSTrielr 01 November 2024 Hello