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Home My WebLink About20260318 RAPTOR MATERIALSuc February 9,2026 Weld County Clerk to the Board 1150 O Street Greeley, CO 80631 Re: Cogburn Sand,Gravel,and Reservoir Project,File No. M-2025-016, 112 Construction Materials Reclamation Permit Application,Third Adequacy Response The original 112c permit application for the Cogburn Sand, Gravel and Reservoir Project, (Cogburn), File No. M-2025-016 was submitted to the Division of Mining, Reclamation, and Safety (Division)on March 13, 2025; the application was called complete on March 28,2025. The Division subsequently issued a Preliminary Adequacy Review letter on July 2, 2025; a response was submitted to the Division on September 12, 2025. The Division subsequently issued a Second Adequacy Review letter, including two technical memos that address groundwater and geotechnical stability, on November 25, 2025; a response was submitted to the Division on December 19, 2025. The Division subsequently issued a Third Adequacy Review letter on January 16, 2026. The enclosed submittal,which addresses all items from the third adequacy letter, does not contain all elements of the complete permit application; only updated narratives, maps, addenda,and new material are included. Although not requested as an adequacy item, the Map Exhibits have been updated to reflect minor re-grading around a Last Chance Ditch lateral as applicable. These minor edits do not materially impact the quantities that are the basis for the financial warranty cost estimate. A complete list of exhibits and addenda in this submittal is presented in Table 1 below. Table 1.Complete List of Addenda for M-2025-016 Permit Application-Third Adequacy Response Exhibit/Letter Addendum/Enclosure Status from December 2025 Adequacy No.2 Map Exhibit C-1 N/A Updated Map Exhibit C-2 N/A Updated Exhibit D N/A Updated Exhibit E N/A Updated Exhibit E Table E-1: Mining-Regrading Schedule Updated Map Exhibit F N/A Updated Exhibit G/P. Lennberg Groundwater Monitoring Plan (AWES) Updated Memo Adeq.No. 2 Exhibit G/P. Lennberg Review Comment Responses 4—6 New Memo Adeq.No. 2 (AWES) Map Exhibit G N/A Updated Map Exhibit I N/A Updated Exhibit L N/A Updated Pl i\D\i G VlevieL GG' P LC.DcIMc\1 1 ‘ "tc--1 \M<'r \ \ \$\ Viz(Gt}1 CAE. 1'DO \ \t-t 1 sci> 2026-0318 bp \o\alc Map Exhibit L N/A Updated Second Adequacy Weld County Clerk and Recorder Proof of Amended Submittal Package Receipt Your signature below acknowledges receipt of the above-mentioned materials, as attached. The materials should be added to the above-referenced application, as originally submitted to the Weld County Clerk to the Board, and made accessible for public review. RECEIVED Received on: , 2026 By: FEB 1 0 2026 WELD COUNTY COMMISSIONERS Office of the Weld County Clerk to the Board of County Commissioners February 9,2026 Joel Renfro Environmental Protection Specialist Colorado Division of Reclamation Mining and Safety 1313 Sherman Street, Room 215 Denver, CO 80203 Re: Cogburn Sand, Gravel,and Reservoir Project,File No.M-2025-016, 112 Construction Materials Reclamation Permit Application,Adequacy Review No. 3 Dear Joel: The Division of Reclamation, Mining and Safety(Division/DRMS), Office of Mined Land Reclamation(OMLR)reviewed the contents of the Second Adequacy response submitted on December 22, 2025 for the 112c permit application for the Cogburn Sand, Gravel and Reservoir Project, (Cogburn), File No. M-2025-016.At the time of this submittal,the decision date for the DRMS to issue an approval or denial of the permit application was January 23,2025. The decision date has since been extended to March 28, 2026. The Division's review consisted of comparing the application content with the requirements of the Mineral Rules and Regulations of the Colorado Mined Land Reclamation Board for the Extraction of Construction Materials. The Division identified the following adequacy items in the application requesting clarification or additional information, incorporating reference to Technical Review Memoranda from other DRMS staff(Patrick Lennberg). These additional items have also been addressed in this response. We have reviewed the Division's comments and trust the following reply will serve to fully address them. For greater continuity and ease of reference,we have iterated the comments from the DRMS Adequacy Review No.3 (Review)of January 16, 2026 according to each item's respective number from the Review, iterated in a graphical box,with our comments in blue following. Please note that as part of this adequacy response, a minor modification was made to the excavation limit of Pit P125A to maintain an appropriate setback from a ditch lateral to the Last Chance Ditch adjacent to the northwest corner of the pit,which reduced the P125A extraction area from 23.8 acres to 23.5 acres. As part of this revision,a complete QA/QC of quantities and the associated reclamation cost estimate was completed, which resulted in a decrease in the financial warranty estimate of approximately 1.1%. Rule 6.4.5 Exhibit E—Reclamation Plan 1. Please describe how the concrete footings that are being used as inert fill will be disposed of on-site. Furthermore, how will it be incorporated within the rest of the fill to avoid creating voids within the backfill? The concrete footings,which have dimensions of 2' x 2' x 6' feet, will be hauled to the adjacent M1999-006 Kurtz site for processing and subsequent recycling upon removal of the supported conveyor. In the unlikely event that Raptor chooses not to recycle the footings, they will be processed on site in a central location for disposal as inert fill. If present,all rebar will be removed from the footings via crushing of the footings using a hammer on an excavator or skid steer prior to placement within the pit liner backfill. Footings will be crushed to the size of manageable rubble(i.e., approximately 6-12 inches d50)to ensure stable placement and compaction of the backfill,and to minimize potential voids in the backfill material. The footing rubble will be placed at least 20 feet below ground surface to ensure that their placement is within the thickest portion of the liner backfill (approximately 13 feet thick at greater depths—see Figure 1 in Exhibit E). As the backfill is installed in 5-6 foot lifts,the footing rubble will be placed at least 3 feet from the underlying liner to minimize the potential for punctures to the liner. A statement summarizing this process has been added to Exhibit E. 2. Approximately where is the disposal area for the inert fill?A general location is needed to accurately assess costs to haul the material disposed of on-site. Raptor plans to haul the concrete footings to the adjacent M 1999-006 Kurtz site for processing and recycling. This information has been added to Exhibit L. In the unlikely event that the footings are disposed of on site, they will be disposed of to a location most convenient to the layout of the conveyor at the time of reclamation. For the purposes of a worst-case cost estimate,we will assume that the inert fill will be disposed of within the backfill of the northwest highwall of pit P125B. 3. It's stated within this Exhibit that borrowing additional material from the bases of Pits P125A and P125B would require an estimated 4.3 feet of additional excavation. In Exhibit L, it's stated under the"Liner" section that retrieving the liner material would require an additional 1.1± feet of excavation. Then, under the"Backfill"section, it states that an additional 3.1±feet of excavation would be necessary to obtain adequate backfill material. It's unclear if the sum of these additional excavations is where the 4.3 feet amount in Exhibit E came from.Please confirm how much additional excavation would be required to meet liner and backfill needs,and the total depth of the bottom of the pits. The total additional 4.3 feet of excavation stated in Section 2.A of Exhibit E is the sum of the additional pit bottom excavation depths for liner material (1.1 ft) and liner backfill material (3.1 ft). The values are reported to 0.1 ft since that represents a reasonable scale for the described work and appear to sum incorrectly due to rounding that obscures the omitted hundredth of a foot precision. However, the 4.3 feet of excavation reported in Exhibit E Section 2.A erroneously omitted the additional 1.1 feet of excavation required to supplement the Pit P125_S1 backfill. The financial warranty estimate for the Second Adequacy submittal was, therefore, based on a total additional excavation depth of 5.4 feet. The quantities QA/QC completed as part of this Third Adequacy confirmed smaller expected pit bottoms than previously modeled, resulting in greater excavation depths required to source the liner and backfill materials. The additional excavation depth required to backfill P125_S1 has been increased to 1.7 feet(see response to Third Adequacy Item 8.c). The total additional excavation depth has been corrected in Exhibit E to the sum of the excavation depths required: 7.0 feet(1.4 feet for liner material, 3.9 feet for lined backfill, and 1.7 feet for Pit P125_S1 backfill).The financial warranty estimate has been updated accordingly for the additional 1.6 feet of excavated material for liner and backfill. Rule 6.4.7 Exhibit G—Water Information 4. In the Applicant's response to the objector,Acord St Vrain, in the third paragraph there is a summary description of the mounding and shadowing effects on groundwater. In the Mining and Water Storage Analysis in the Results section the summary of mounding and shadowing differ,please explain this discrepancy. See attached response memo from AWES. 5. In Adequacy Review No.1 Responses, item#20 of Mr. Lennberg's memo,the Applicant commits to a quarterly reporting frequency. The specified frequency is missing in the Groundwater Monitoring Plan,although it is stated within the plan that groundwater quality and level measurements will be submitted quarterly. See attached response memo from AWES 6. In the Groundwater Monitoring Plan, Section 2.3, it is stated that wells 1,2, 3 and 6 will have samples collected for baseline analysis.This section needs to be updated to be consistent with the response given to item #6 of Mr. Lennberg's Adequacy No.2 memo. See attached response memo from AWES. Rule 6.4.12 Exhibit L—Reclamation Costs 7. Please state the number of concrete footings that will be demolished and disposed of so accurate costs can be assessed. I 40-ft conveyor sections will be supported by footings every 40 feet. For the estimated 1,430 feet of conveyor that will remain to be dismantled at the time of reclamation, an estimated 36 footings will need to be disposed of. A statement to this effect has been added to Exhibit L. 8. When comparing the fill volumes provided in Exhibit E to Exhibit L, it appears that there are discrepancies between them. For the following identified discrepancies, please identify the correct material volume: a. Total Liner Volume i. Exhibit E shows a total Liner Volume for P125A and P125B as 117,988 CY in Table 1,while Exhibit L shows a total of 47,913 CY(Haul+Push) in Table 7. Exhibit E Table 1 erroneously lists the liner volumes that would be required to reclaim the entire pits. This cost estimate is based on a maximum exposed wall length of 5,000 feet, which corresponds to the volumes listed in Exhibit L Table 7. The liner volumes in Exhibit E Table 1 have been corrected to match these volumes. b. Lined Slope Fill i. Exhibit E shows a total Lined Slope Fill for P125A and P125B as 356,471 CY in Table 1,while Exhibit L shows a total of 131,731 CY (Haul+Push) in Table 8. Exhibit E Table 1 erroneously lists the lined slope fill volumes that would be required to reclaim the entire pits. This cost estimate is based on a maximum exposed wall length of 5,000 feet, which corresponds to the volumes listed in Exhibit L Table 8. The lined slope fill volumes in Exhibit E Table I have been corrected to match these volumes. c. P125S1 Backfill i. It's explained at the end of Page 3 in Exhibit D that the backfill for P125_S1 is approximately 550,000 CY.Table 8 in Exhibit L shows that 471,535 CY will be used to backfill this pit. The exact volume required to backfill pit P125_S1 was calculated using a 3D surface calculation as 549,690 BCY(the total pit volume minus 6 inches of topsoil across the surface area). The 421,323 BCY of overburden available to backfill P125_SI was calculated to swell to 484,521 LCY using a modified swell factor of 1.15 to account for subsequent placement and settling in the pit as backfill(explained in Exhibit L second paragraph of page 9). The P125_S1 backfill deficit was therefore determined to be 65,169 LCY, which is sourced from the bases of pits P125A and P125B. These quantities, some of which were incorrectly presented in Exhibit L as holdovers from previous iterations of the cost estimate, have been corrected. The ripping cost calculations were updated as part of this adequacy response, in which an additional 1.6ft of ripped depth was determined to be required to account for the corrected supplemental backfill volume and smaller estimated pit bases at the time of ' reclamation. Although there is an increase in ripping depth for liner and backfill material, the cost estimate has decreased slightly due to the same number of ripper passes required (approximately 2.5 feet ripped per pass), which was not increased by the addition of 1.6 feet of ripped material, over a smaller pit base area. 9. Please update the accurate volumes to be used in their appropriate Exhibit. The quantities noted in Adequacy Comment 8 have been updated in their corresponding Exhibits. 10. Swell factors are applied to the reclamation material volumes in Exhibit L. It is unclear if the volumes described in Table 1 of Exhibit E have already had a swell factor applied. Please clarify if those volumes in Exhibit E are in Bank Cubic Yards (BCY)or Loose Cubic Yards(LCY). Please note that the Division already applies swell factors when estimating reclamation costs. While applying swell factors to volumes is useful, it's best to provide volumes in BCY. The volumes in Exhibit E Table 1 are in Bank Cubic Yards. Volumes provided in the Exhibit L text are provided as BCY. Costs were estimated in a manner similar to prior cost estimating sheets provided by the DRMS, where certain unit costs were estimated in $/LCY; conversion from BCY to LCY is provided in certain tables in Exhibit L where the conversion was necessary to implement the same unit cost as the DRMS. Additional Items: 11. The response to item#37 in the previous adequacy review letter suggested that an agreement with the Last Chance Ditch Company is in preparation.Please provide this finalized agreement. The Last Chance Ditch Company has informed Raptor that they are intending to review a draft agreement with their Board of Directors at their February 20`h, 2026 board meeting. Raptor has requested a letter from the Last Chance Ditch Company to indicate the agreement's intent to the DRMS. If a letter cannot be procured prior to the board meeting, the agreement will be submitted to the DRMS upon receipt. 12. Pursuant to Rule 1.6.2(1)(c) and (2), any changes or additions to the application on file in our office must also be reflected in the public review copy which was placed with the local County Clerk and Recorder. Pursuant to Rule 6.4.18, you must provide our office with an affidavit or receipt indicating the date on which the revised application/adequacy response was placed with the local County Clerk and Recorder. The receipt from the Weld County Clerk and Recorder for the Second Adequacy Submittal for the M-2025-016 112c permit application, dated December 19, 2025. is attached to this adequacy response. //PAGE 1 EXHIBIT D 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 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.The optional seed mix will be used only after submittal to and approval of a Technical Revision by the DRMS1.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 operation2. 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 one of the other designated stockpile locations shown in Exhibit C-2,Site Plan Map,as determined by the advancement of the extraction and reclamation operations.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 reducing 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 volumes of salvaged soil will range from 8,200- 16,500 cubic yards for Pit P125_S1,from 19,100-38,400 cubic yards for pit P125A,and from 24,800—49,700 cubic yards for pit P125B.Salvaged soil will be stockpiled in designated stockpile locations shown in Exhibit C-2,Site Plan Map.Smaller short-term stockpiles may be created along pit edges where regrading is imminent or in progress and re-soiling will follow.Designated stockpile locations may store either topsoil or overburden subject to operational requirements,but topsoil and overburden will not be mixed in a single stockpile.Stockpiles will be clearly signed to identify whether the stored material is topsoil or overburden. Re-soiling volumes required above the waterline of the lined water storage will require much less soil. The re-soiling areas are estimated at 4.7 acres for Pit P125A and 6.4 acres for Pit P125B with volumes calculated based on a nominal six inches of soil cover at 3,763 and 5,179 cubic yards,respectively.Outside of reclaimed excavation areas,approximately 1.5 acres of access roads and materials storage and parking 'Adequacy 2,Item 8 2 Adequacy 1,Items 28,62 3 Adequacy 1,Item 29 RAPTOR Raptor Materials,LLC Cogburn Sand,Gravel,and Reservoir Project February 2026 MATERIALS uc A REGULAR IMPACT f 1121 CONSTRUCTION PERMIT APPLICATION-COLORADO DIVISION OF RECLAMATION MINING AND SAFETY.OFFICE OF MINED LANG RECLAMATION E S p E c //PAGE 2 EXHIBIT D areas will require an estimated 1,210 cubic yards of topsoil.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 subject to maintaining on site no less than 1.3 times the amount of topsoil required for reclamation of disturbed areas that will have topsoil replaced4. Following soil salvage,the balance of the extractable deposit will 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.Overburden not suitable for processing and sale as sand and gravel will be stockpiled in designated stockpile locations shown in Exhibit C-2,Site Plan Map for use in regrading and reclamation activities.Resource recovery will commence from the southeast corner of pit P125_S1,establishing a keyway moving north and west,and then moving northwestward via an advancing face.Discharge will occur near the northeast corner of P125_S1 and southeast corner of P125A to an existing ditch on the west side of WCR17.Additionally, discharge from the P125B area will occur near the southwest corner of P125B to the unnamed tributary to St.Vrain Creeks. Pit P125_S1 has a tank battery located at its southeastern border;extraction will not occur within 25 feet of these tanks while this infrastructure is still in place.An underground oil and gas pipeline is located between 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 23 feet below ground surface(bgs),extracted final walls will be no steeper than 3H:1V for depths 23 feet bgs and greater(refer to the Exhibit S addendum:Slope Stability Analysis and supplemental letter dated July 1,2025 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/overburden stockpile locations in Map Exhibit C-2 are idealized,and may vary slightly in shape,size,and location presented based on conditions encountered in the field.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. Any change in location of stockpiles r will be addressed in an appropriate revision6 as determined necessary by DRMS based on the change'. 4 Adequacy 1,Item 30 5 Adequacy 1,Item 35 6 Adequacy 1,Items 36,60 'Adequacy 2,Item 9 RAPTOR Raptor Materials,LLC Cogburn Sand,Gravel,and Reservoir Project February 2026 MATERIALS uc A REGULAR IMPACT f 112]CONSTRUCTION PERMIT APPLICATION-COLORADO DIVISION OF RECLAMATION MINING AND SAFETY.OFFICE OF MINED LANO RECLAMATION R E S p E c //PAGE 3 EXHIBIT D 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.The extraction front refers to areas of the pit wall being mined in areas of active extraction operations8. 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. 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 by truck to topsoil/overburden stockpiles or to the conveyor for transportation to the processing facility as described in this Exhibit.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.The estimated volume of overburden material from all three mining areas is inadequate to reclaim P125_S1.Additional backfill will either be excavated as borrow material from the bottom of Pits P125A and P125B,or from available backfill material on the M-1999-006, Kurtz Resource Recovery&Land Development Project permit owned by Raptor and adjacent to this permit9. Concurrent backfilling and grading of cut perimeter slopes,while desirable,may be obstructed in time and extent 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 Division of Reclamation,Mining and Safety(DRMS)Annual Report.Any change in the key variable parameters that impact the financial warranty estimate beyond the maximum financial warranty stated in Exhibit L,Reclamation Costs,will be addressed in a Technical Revision and the financial warranty updated1'' 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 conveyor along the east side of Weld County Road 17 on Raptor's adjacent P115 Kurtz(M1999-006) permit,which will convey material to be processed at the existing P115 Kurtz plant.Extracted materials from Pits P125_S1 and P125B will be loaded onto a conveyor that will tie into the Pit P125A conveyor for offsite transport.Truck transportation of excavated material to the transfer conveyor may also be used as an alternative to the conveyor from P125_S1 and possibly P125B as needed for operational flexibility. Processed material will then be transported directly from the plant to area markets as needed and where appropriate". Estimated volumes of fill for backfilling P125_S1,or regrading the slopes for the lined reservoirs in P125A and P125 B are as follows12: P125_S1 Backfill =approximately 550,000 cubic yards 8 Adequacy 2,Item 10. 9 Adequacy 1,Items 33,37 10 Adequacy 1,Item 40 11 Adequacy 1,Item 34 12 Adequacy 1,Items 38,39 RAPTOR Raptor Materials,LLC Cogburn Sand,Gravel,and Reservoir Project February 2026 MATERIALS Lc A REGULAR IMPACT f 1121 CONSTRUCTION PERMIT APPLICATION-COLORADO DIVISION OF RECLAMATION MINING AND SAFETY.OFFICE OF MINED LAND RECLAMATION R E S p E c //PAGE 4 EXHIBIT D P125A Regrade=approximately 206,000 cubic yards P125 B Regrade=approximately 151,000 cubic yards The transfer conveyor will be a short belt,approximately 150 feet long to convey extracted sand and gravel over WCR 17.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 and metal(or other appropriate material)pans will be installed under the conveyor structure to prevent spillage 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.The proposed conveyor from P125_S1 is expected to be approximately 1,280 LF in length.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 proposed conveyor from P125_S1 will be relocated after P125_S1 is fully extracted to transport material from P125B.The proposed conveyor between Pits P125B and P125A is expected to be approximately 870 LF in length and 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.Final conveyor specifications are to be determined however belt width is anticipated in the range 30-54"13. 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. Any structures constructed within an offsite permitted area to support on-site operations will be incorporated into the respective permit through an appropriate revision14. 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. 15Backup 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 extraction. 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.Any significant change to the location,extent,and nature of the conveyor systems to that designated in this submittal will be reflected in an appropriate revision submitted and approved by the DRMS16 13 Adequacy 1,Item 41 14 Adequacy 2,Item 6 15 Adequacy 1,Item 42(previous paragraph in original application removed) 16 Adequacy 1,Item 43 RAPTOR Raptor Materials,LLC Cogburn Sand,Gravel,and Reservoir Project February 2026 M AT E R I A LS uc A REGULAR IMPACT f 1121 CONSTRUCTION PERMIT APPLICATION-COLORADO DIVISION OF RECLAMATION MINING AND SAFETY.OFFICE OF MINED LANG RECLAMATION E S p E c //PAGE 5 EXHIBIT D SECTION (C) (c)all water diversions and impoundments;and 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. Dewatering of the property in preparation for extraction and resource recovery will occur by establishment of a dewatering pump and/or well in the northeastern corner(low point)of Pit P125_S1 and southeastern corner of Pit P125A and discharged to an adjacent settling pond prior to eventual release into a ditch on the west side of Weld County Road 17 which returns water to the Last Chance Ditch.The point of discharge and settling pond location are on Exhibit C2:Extraction Plan Map. Additionally,discharge from the P125B area will occur near the southwest corner of P125B to the unnamed tributary to St.Vrain Creek.All discharge will conform to the applicable CDPHE discharge permit requirements,and any changes to discharge points would require approval from CDPHE and be reflected in an appropriate permit revision with DRMS17. 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 "Adequacy 1,Item 45 RAPTOR Raptor Materials,LLC Cogburn Sand,Gravel,and Reservoir Project February 2026 M AT E R I A LS uc A REGULAR IMPACT f 1121 CONSTRUCTION PERMIT APPLICATION-COLORADO DIVISION OF RECLAMATION MINING AND SAFETY.OFFICE OF MINED LANG RECLAMATION E S p E c //PAGE 6 EXHIBIT D 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. Of the total 64.8 acres of potential extraction(e.g.,the full eventual extents of P1 25_S1,P125A,and P1 25B),the resulting basins will function as multiple-use reservoirs with a slightly fluctuating combined water surface area covering 42.4 acres.Of the remaining balance of 21.3±acres of land above the anticipated high-water mark of the reservoirs, 10.2 acres of disturbed at-grade backfill,not otherwise committed to existing or planned structures or infrastructure over Pit P1 25_S1,will be stabilized with vegetation;the remaining 11.1 acres of basin slopes in Pits P1 25A and P1 25B will be stabilized with vegetation's SECTION (D) (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.Any changes required in the nature of planned extraction or reclamation will be addressed in an appropriate revision as determined necessary by DRMS based on the change19. If lands are needed beyond the designated permit boundary,those lands will be secured for the active DRMS permit by Amendment20. 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 follows21: 10.2 Acres= Primary Extraction Pit P125_S1 —South Pit 23.5 Acres= Primary Extraction Pit P125A—Eastern Pit 30.8 Acres= Primary Extraction Pit P125B—Central Pit 64.5 Acres=Total Primary Extraction 131.9 Acres=Affected Lands beyond planned extraction limits 196.4 Acres TOTAL Of the outlying 131.9 Acres,additional areas of initial disturbance include: 0.9 Acres= Employee Parking/Materials Storage 0.3 Acres=Sediment Basins 0.1 Acres=Outfall Pipe Corridors 0.2 Acres=Conveyor Corridors External to Extraction Areas 1.5 Acres= Disturbed Area beyond Primary Extraction Limits 64.5 Acres=Total Primary Extraction 66.0 Acres=Maximum Proposed Disturbed Acreage22 18 Adequacy 1,Item 46(following paragraph in original application removed) 19 Adequacy 2,Item 9 20 Adequacy 1,Item 47 21 Adequacy 1,Item 48 22 Adequacy 2,Item 12 RAPTOR Raptor Materials,LLC Cogburn Sand,Gravel,and Reservoir Project February 2026 MATERIALS Lc A REGULAR IMPACT f 1121 CONSTRUCTION PERMIT APPLICATION-COLORADO DIVISION OF RECLAMATION MINING AND SAFETY.OFFICE OF MINED LANG RECLAMATION E S p E c //PAGE 7 EXHIBIT D Of the outlying 130.4 acres,existing developed lands that will not require reclamation include: 5.9 Acres= Unpaved Perimeter Access Roads* 0.2 Acres=Vehicle Crossings* 0.6 Acres= Existing Oil and Gas Facilities 1.0 Acres= Existing Farming/Oil and Gas Roads 7.7 Acres= Existing Developed Lands *Existing roads may be improved via widening or addition of gravel,and will be retained as such according to the desires of the landowner. Of the outlying 122.7 acres,41.3 acres are designated as a Mineral Reserve Area,which may be permitted and mined at some time in the future. 81.4= Remaining Outlying Areas 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 20.0±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 DRMS Annual Reports23. 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. In addition to the three above-mentioned pits,a Mineral Reserve Area is located between pit P125B and the St.Vrain Creek,identified as P125C on Map Exhibit C-2.The western portion of Pit P125B,up to a 400-ft setback from the unnamed tributary that traverses the site,is also identified as a Mineral Reserve Area pending later considerations of floodplain and potentially jurisdictional determination on some areas of possible wetlands.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 appropriate revision to the permit24. • 31.2 Acres—West Pit • 10.1 Acres—Western Portion of Central Pit The remaining 81.4 acres of lands within the permitted limits may comprise levees,previously affected areas,and areas of minor to no disturbance(including public transportation corridors,rights-of-way, 23 Adequacy 1,Item 49 24 Adequacy 1,Item 51 RAPTOR Raptor Materials,LLC Cogburn Sand,Gravel,and Reservoir Project February 2026 MATERIALS Lc A REGULAR IMPACT f 1121 CONSTRUCTION PERMIT APPLICATION-COLORADO DIVISION OF RECLAMATION MINING AND SAFETY.OFFICE OF MINED LANG RECLAMATION R E S p E c //PAGE 8 EXHIBIT D 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 aerials25. 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 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(I)THROUGH[III) 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 iii. 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.) 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. 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 the 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. 25 Adequacy 1,Item 52 RAPTOR Raptor Materials,LLC Cogburn Sand,Gravel,and Reservoir Project February 2026 M AT E R I A LS uc A REGULAR IMPACT f 1121 CONSTRUCTION PERMIT APPLICATION-COLORADO DIVISION OF RECLAMATION MINING AND SAFETY.OFFICE OF MINED LANG RECLAMATION E S p E c //PAGE 9 EXHIBIT D 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(Exhibit C-0-Aerial Image and Vegetation Map)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 10.2 acres.The direction of extraction will follow the perimeter of the extraction limits in order to establish the perimeter keyway(dewatering trench)for the 10.2-acre Pit P125_S1,23.5-acre Pit P1 25A,and 30.8-acre Pit P125B.Approximately 66.0 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 simultaneously26. The estimated timetable for extraction,commencing approximately winter 2025 to spring 2026,is estimated to take 5-6 years combined,or longer,followed by up to an additional five years to complete reclamation;or a total estimated life of the mine of 10-11±years,and ending approximately winter 2035 to 2037. This is a life of 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. 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 summarized in the required DRMS Annual Report.As stated in Section(a)of this exhibit,any change in the key variable parameters that impact the financial warranty estimate beyond the maximum financial warranty stated in Exhibit L,Reclamation Costs,will be addressed in a Technical Revision and the financial warranty updated27. SECTION (F) 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(I)AND(ID (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. 26 Adequacy 1,Item 54 27 Adequacy 1,Items 53,55 RAPTOR Raptor Materials,LLC Cogburn Sand,Gravel,and Reservoir Project February 2026 MATERIALS Lc A REGULAR IMPACT f 1121 CONSTRUCTION PERMIT APPLICATION-COLORADO DIVISION OF RECLAMATION MINING AND SAFETY.OFFICE OF MINED LAND RECLAMATION E S p E c //PAGE 10 EXHIBIT D Generally,total soil and overburden depth(including all soil horizons)over the property may vary from approximately zero 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 excavations28. Additional geologic considerations are also included in the addendum:Slope Stability Analysis. SECTIONS (0)AND (H) 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. The primary commodities to be extracted are sand and gravel in a range of marketable sizes.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 use29. Incidental products depending on availability from and suitability of the material extracted,and market available,could include but are not limited to topsoil,overburden and clay.These product uses are diverse but could reasonably be expected to include landscaping,reclamation or use as bulk fill.As stated in Section (a),Raptor commits to maintaining on site no less than 1.3 times the amount of topsoil required for reclamation of disturbed areas that will have topsoil replaced30. It is anticipated that there will not be excess overburden and Raptor commits to not selling overburden unless there is more than 1.3 times the amount of overburden required for reclamation of disturbed areas31. 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. SECTION (J) 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 29Adequacy 1,Item 56 29 Adequacy 1,Item 62 30 Adequacy 1,Item 63 31 Adequacy 2,Item 4 RAPTOR Raptor Materials,LLC Cogburn Sand,Gravel,and Reservoir Project February 2026 MATERIALS Lc A REGULAR IMPACT f 1121 CONSTRUCTION PERMIT APPLICATION-COLORADO DIVISION OF RECLAMATION MINING AND SAFETY.OFFICE OF MINED LANG RECLAMATION E S p E c //PAGE 11 EXHIBIT D 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,and described below.NOTE:Access purpose and usage may change in time from that indicated here-in.Any changes to access points will be addressed in an appropriate revision.Also,general existing dimensions and length of existing access roads are represented in the aerial images or graphic representation on the Exhibit Maps relative to the access locations detailed,below.Existing roads are generally 8-12 feet wide,with localized exceptions in some cases up to 15 feet.Modifications to existing roads including minor widening up to 15 feet(with additional width for safety berms if required),or application of additional gravel to improve the running surface may occur as needed and will be reported in DRMS Annual Reports. Such improvements will be retained according to the desires of the landowner32. Northeast Entrance:Primary entrance and access to Pit P125A East Entrance(Access Point#2):Alternate access to Pit P125A Southwest Entrance(Access Point#3):Access to Pit P125_S133 Existing roads outside of the permit boundary are shown on Exhibit C-1:Existing Conditions Map.Additional roads may be developed around the perimeter of the extraction areas primarily for light vehicle access.The location of these roads has been added to Exhibit C-2.These roads will be lightly graveled as necessary and up to 20 feet wide including safety berm where necessary.As sand and gravel mining is not precision engineered excavation and extraction will field-fit according to the conditions and geology encountered,combined with the very flat nature of the existing irrigated fields,detailed design of possible drainage structures is impractical.While largely confined by small existing earthen berms around the perimeter of the extraction areas,where apparent or evident that water will accumulate on sides of roads away from the excavations,small ditches will be constructed as needed,with culverts to drain to the pits.The proposed design of any drainage or runoff conveyance structures will be submitted as a Technical Revision for approval prior to construction34.As with any existing roads,used in their existing state or improved,the perimeter roads will be retained according to the desires of the landowner. 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 permit35 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. 32 Adequacy 1,Items 57,64 33 Adequacy 1,Item 32 34 Adequacy 2,Item 13 35 Adequacy 1,Item 65 RAPTOR Raptor Materials,LLC Cogburn Sand,Gravel,and Reservoir Project February 2026 M AT E R I A LS uc A REGULAR IMPACT f 1121 CONSTRUCTION PERMIT APPLICATION-COLORADO DIVISION OF RECLAMATION MINING AND SAFETY.OFFICE OF MINED LANG RECLAMATION R E S p E c //PAGE 12 EXHIBIT D Known structures and landowners,including above and below ground utility owners,located on and within 200±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 DRMS approval of this application,if such changes result in changes to the mining and reclamation plan will be addressed in an appropriate revision as determined necessary by DRMS based on the change36.All established setback 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.Any changes mining beyond the proposed extraction areas will be addressed in an appropriate revision37. 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 J—Vegetation Information,until and unless otherwise revised38 36 Adequacy 2,Item 9 37 Adequacy 1,Item 58 38 Adequacy 1,Item 59 RAPTOR Raptor Materials,LLC Cogburn Sand,Gravel,and Reservoir Project February 2026 M AT E R I A LS uc A REGULAR IMPACT f 1121 CONSTRUCTION PERMIT APPLICATION-COLORADO DIVISION OF RECLAMATION MINING AND SAFETY.OFFICE OF MINED LANG RECLAMATION R E S p E c //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 rangeland.Pits P125A(23.8 acres)and P125B(30.8 acres)will be reclaimed as lined reservoirs,while Pit P125_S1 (10.2 acres)will be backfilled as soon after extraction as practically possible, topsoil replaced and seeded to return to rangeland.Backfill will be sourced from overburden on site as well as from the adjacent,active P115 Kurtz(M1999-006)and P122 Bearson(M2015-0331)sites and/or the bases of Pits P125A and P125B as needed to complete timely regrading or backfill.Raptor estimates a total volume of overburden from the extraction on site of approximately 490,000 cubic yards. Additional material deemed unsuitable for saleable sand and gravel but suitable for fill may exist within the sand and gravel bed but estimating this volume is not possible.Additional fill may be"borrowed"from the floor of the extraction areas.Raptor anticipates a reasonable range of additional backfill excavated from pit bottoms to complete the reclamation plan outlined will be approximately 225,000 cubic yards,which would require an estimated additional 7.02 feet of excavation from the bases of Pits P125A and P125B. Topsoil will be stripped and stockpiled onsite for use in reclamation as extraction progresses3. SECTION 2.B 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 proposed post-mining land uses of developed water resources and rangeland is consistent with land use in the vicinity and in particular along the St.Vrain Creek,and is in keeping with the spirit and intent of the 'Adequacy 2,Item 17 2 Adequacy 3,Item 3 3 Adequacy 1,Items 67,68 RAPTOR Raptor Materials,LLC Cogburn Sand,Gravel,and Reservoir Project February 2026 MATERIALS uc A REGULAR IMPACT f 1121 CONSTRUCTION PERMIT APPLICATION-COLORADO DIVISION OF RECLAMATION MINING AND SAFETY.OFFICE OF MINED LANO RECLAMATION R E S p E //PAGE 2 EXHIBIT E 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 2.0 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 Pits P125A and P125B will be reclaimed as developed water resources through the construction of lined reservoirs.Pit P125_S1 will be backfilled and reclaimed as rangelands. 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 winter 2025 to spring 2026,is estimated to take 5-6±years combined,or longer,followed by up to an additional five years to complete reclamation;or a total estimated life of the mine of 10-11±years,and ending approximately winter 2035 to 2037. 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 overburden material stripped in the permit area and supplemented as necessary with borrow material from pit floors. Lining 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 they meet 4 Adequacy 1,Items 69,70 5 Adequacy 1,Item 71 RAPTOR Raptor Materials,LLC Cogburn Sand,Gravel,and Reservoir Project February 2026 MATERIALS uc A REGULAR IMPACT f 1121 CONSTRUCTION PERMIT APPLICATION-COLORADO DIVISION OF RECLAMATION MINING AND SAFETY.OFFICE OF MINED LANG RECLAMATION R E S p E //PAGE 3 EXHIBIT E 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 DRMS on receipt;or as part of any request for release of the permit,in part or wholes. 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 St.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 problems 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. Liner construction involves building a compacted low permeability core by placing and compacting suitable material in 6"±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 1 below'. Backfill material placed over liners to regrade the lined reservoirs to 3:1 will be placed in relatively shallow lifts typically 5 to 6-feet high as the liner is built up.No specific compaction is proposed or has been found necessary in previous construction as with the relatively shallow lifts,adequate compaction is achieved through the repeated traversing over the material by haul trucks and dozers.In final reclamation and decommissioning of the site,concrete conveyor footings will be transported off site for processing and recycled.In the unlikely event that Raptor decides not to recycle the concrete footings,,they will be transported to a central location on-site for processing and disposed of as fill within the liner backfill8. 6 Adequacy 1,Item 76 'Adequacy 1,Item 72 8 Adequacy 2,Items 20 and 28 RAPTOR Raptor Materials,LLC Cogburn Sand,Gravel,and Reservoir Project February 2026 MATERIALS uc A REGULAR IMPACT f 1121 CONSTRUCTION PERMIT APPLICATION-COLORADO DIVISION OF RECLAMATION MINING AND SAFETY.OFFICE OF MINED LANG RECLAMATION R E S p E //PAGE 4 EXHIBIT E Concrete will be processed through crushing to the size of manageable rubble and cutting and disposing of any projecting rebar,if present,prior to placement within the liner backfill.Rubble will be placed as deep as possible within the backfill,and at least 3 feet from the liner to avoid any puncture of the liner9. Backfill in P125_S1 is proposed to be end dumped at surface level extending fill faces from the edges of the pit.Some initial settling would be expected and if more than modest swales or other features generally acceptable and desirable on range land,additional fill would be placed to establish a more level surface1''. Typical Liner and Regrade for Extraction Limit Wall— Final Reclamation r —.� Original Ground Surface Sequence N 1. In cycles •... • Establish line in keyway w .. Static Water Level • Install liner in 6'lifts • ww (vanes) • Backfill to 3H:1V 23' w 2. Replace topsoil tiN wM ww Liner M_ Groundwater Level ~w/,, �._..-. �. .._— MV�WV� Backbit at �NVM 1:25H:1V slope ^^yw� 3H:1Vslope to 23-ft depth ^^.,... unexcavated ^^^Nr�. Perimeter Wall \ `^� 3H:1V slope ^^.n below 23-ft depth me" Bedrock f K Byway Figure 1.Typical Completed Reclamation Liner and Regraded Slope for Extraction Limit Wall11 Estimated volumes of material used in liner construction,overburden available from the extraction areas, and backfill on lined slopes is summarized in Table 1 12. Table 1 Key Reclamation Quantities Liner Volume Overburden Volume Lined Slope Fill Depth Min Depth Max (Cl) (CY) (CY) (ft) (ft) P125 S1 NA 70,785 NA 40 50 P125A 27,577 154,213 76,828 35 45 P125B 20,564 200,902 55,905 25 35 Total 48,141 425,900 132,734 -- -- 9 Adequacy 3,Item 1 10 Adequacy 1,Item 85 11 Adequacy 1,Item 73 12 Adequacy 1,Items 74,75,84 ,� ...R.: RAPTOR Raptor Materials,LLC Cogburn Sand,Gravel,and Reservoir Project February 2026 M AT E R I ALS uc A REGULAR IMPACT 11121 CONSTRUCTION PERMIT APPLICATION-COLORADO DIVISION OF RECLAMATION MINING AND SAFETY.OFFICE OF MINED LANG RECLAMATION R E S p E //PAGE 5 EXHIBIT E 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 groundwater monitoring plan has been submitted with the permit application and a drainage plan for the site once submitted,accepted and approved by Weld County will be forwarded to the DRMS13. A Backfill Notice is included with this application as an Addendum at the back of Exhibit E—Reclamation Plan, to cover an expected deficit of fill material to back fill P125_S1 and establish regraded slopes in the lined pits P125A and P125B14. 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 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. Following the required post-reclamation monitoring period,monitoring wells will be abandoned by Raptor Materials(the well owner)in accordance with DWR's BOE Construction Rule 16.4.1 1516: • Any casing above the ground surface will be cut to be level with the ground surface. • The casing underground will be left in place,and the monitoring well will be filled with sand or clean gravel to the static water level. • Between the static water level and 5 feet below ground surface,the monitoring well will be filled with clean native clays. • The uppermost 5 feet below ground surface will be filled with grout. 3.1.8 Wildlife Wildlife safety and protection is discussed in Exhibit H—Wildlife Information. 3.1.9 Topsoiling 13 Adequacy 1,Item 86 14 Adequacy 1,Item 77 15 Adequacy 1,Item 88 16 Adequacy 2,Item 19 RAPTOR Raptor Materials,LLC Cogburn Sand,Gravel,and Reservoir Project February 2026 M AT E R I A LS uc A REGULAR IMPACT f 1121 CONSTRUCTION PERMIT APPLICATION-COLORADO DIVISION OF RECLAMATION MINING AND SAFETY.OFFICE OF MINED LANG RECLAMATION R E S p E //PAGE 6 EXHIBIT E 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 southeastern corner of Pit P125A is intended to allow for the complete extraction of Pit P125_S1 and the near-complete extraction of Pit P125A before application to reclaimed exposed surfaces or if necessary for operational requirements, relocated to another designated stockpile location.The quality of the on-site topsoil is detailed in Exhibits I and J—Soils and Vegetation". SECTION 2.0 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 2.0 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 Section 2.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.) An estimate of the periods of time which will be required for the various stages or phases of reclamation; The estimated timetable for extraction,commencing approximately winter 2025 to spring 2026,is estimated to take 5-6±years combined,or longer,followed by an additional five years to complete reclamation;or a total estimated life of the mine of 10-11±years;ending approximately winter 2035 to 2037.This is a life of 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 10.2-acre pit backfilled to approximate original contour and two(2)reservoir basins totaling 54.3 surface acres,with a static water elevation surface area of 42.4 acres as illustrated on the following Exhibit F-Reclamation Plan Map.The map details the post resource recovery landform 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. "Adequacy 1,Item 78 RAPTOR Raptor Materials,LLC Cogburn Sand,Gravel,and Reservoir Project February 2026 M AT E R I A LS uc A REGULAR IMPACT f 112]CONSTRUCTION PERMIT APPLICATION-COLORADO DIVISION OF RECLAMATION MINING AND SAFETY.OFFICE OF MINED LANG RECLAMATION R E S p E //PAGE 7 EXHIBIT E Roads are proposed to be developed in the setbacks to the excavations providing perimeter access to the pits during operations,and around the lined reservoirs or rangeland post mining.The landowner considers these features desirable,and they are not included in the reclamation plan or cost estimate.Other features such as settlement basins and parking areas are included in the reclamation plan and cost estimate,however if the landowner decides they may be of benefit,an appropriate revision will address such changes. Infrastructure including conveyors,and materials storage conex structures will not be disposed of on site and will be removed from the site unless the owner advises rather than off-site disposal or reuse, the owner desires to reuse the conveyor belt or other infrastructure for some post mining purpose(s)18. iii. 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 D and above in this Exhibit E,is a forecast 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, separate 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:1V,or flatter, unless 2H:1V slopes are otherwise approved by subsequent permit revision. All basin walls below 30 ft bgs will be graded to 3H:1V or flatter.Naturally occurring or previously established slopes may exceed 2H:1V 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. The areas above the static water level for each reservoir are19: P125A=4.7 acres P125B= 6.4 acres All areas to be revegetated,including extraction areas,employee parking and material storage areas, sediment basins,and conveyor and pipe corridors,will be ripped prior to re-soil application.Although 18 Adequacy 2,Item 21 19 Adequacy 1,Item 79 RAPTOR Raptor Materials,LLC Cogburn Sand,Gravel,and Reservoir Project February 2026 M AT E R I A LS uc A REGULAR IMPACT f 1121 CONSTRUCTION PERMIT APPLICATION-COLORADO DIVISION OF RECLAMATION MINING AND SAFETY.OFFICE OF MINED LANG RECLAMATION R E S p E //PAGE 8 EXHIBIT E Raptor's experience is that not all areas will be compacted and require ripping for successful vegetation, Raptor commits to ripping all areas to be revegetated20212z ii. 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 Seed Mixture. The Primary 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. This is compatible with,and an improvement over the diminished lands located in the floodplain of the two rivers,and area monocultures of residential bluegrass lawns and surrounding cropped land23. 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, while 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. iii. 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 DRMS 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 DRMS Annual Reports,as appropriate. While this approach represents the best known professional advice and practice on determining the approach to fertilization borne out by Raptor's successful revegetation efforts on several sites,Raptor acknowledges the need for a basis to establish the financial warranty for reclamation in the event it was to be 20 Adequacy 1,Item 79 21 Adequacy 1,Item 80(following paragraph in the original application removed) 22 Adequacy 2,Item 18 23 Adequacy 1,Item 81 RAPTOR Raptor Materials,LLC Cogburn Sand,Gravel,and Reservoir Project February 2026 M AT E R I A LS uc A REGULAR IMPACT f 1121 CONSTRUCTION PERMIT APPLICATION-COLORADO DIVISION OF RECLAMATION MINING AND SAFETY.OFFICE OF MINED LANG RECLAMATION R E S p E //PAGE 9 EXHIBIT E done by others.Raptor has included as a guide the following fertilization option to support an estimation of cost.This does not represent a commitment to this approach as that is not good practice.Raptor will take the approach described above to ensure the greatest likelihood of successful revegetation24. Targeting an application rate of: - Nitrogen—30-50 pounds/acre - Phosphorus—at least 20 pounds/acre A general fertilizer with L-P-K of 20-10-10 would be satisfactory at a rate of 200 lbs/acre. iv. Revegetation-specify types of trees,shrubs,etc.,quantities,size and location;and 25 26A list of preferred seed mixes,application rates,and methods for revegetation is included as an addendum to Exhibit L—Reclamation Costs. 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 27. 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. 24 Adequacy 1,Item 82 25 Adequacy 1,Item 87(preceding paragraph in the original application removed) 26 Adequacy 1,Item 87 27 Adequacy 1,Item 83 RAPTOR Raptor Materials,LLC Cogburn Sand,Gravel,and Reservoir Project February 2026 MATERIALS Lc A REGULAR IMPACT f 1121 CONSTRUCTION PERMIT APPLICATION-COLORADO DIVISION OF RECLAMATION MINING AND SAFETY.OFFICE OF MINED LANG RECLAMATION R E S p E //PAGE 10 EXHIBIT E 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 on-site efforts and limitations due to sources and vectors beyond the reach of the Operator. 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- regeneration.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 DRMS Annual Reports as warranted. RAPTOR Raptor Materials,LLC Cogburn Sand,Gravel,and Reservoir Project February 2026 M AT E R I A LS uc A REGULAR IMPACT f 1121 CONSTRUCTION PERMIT APPLICATION-COLORADO DIVISION OF RECLAMATION MINING AND SAFETY.OFFICE OF MINED LANG RECLAMATION R E S p E //PAGE 11 EXHIBIT E V. 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 Raptor Materials,LLC Cogburn Sand,Gravel,and Reservoir Project February 2026 M AT E R I A LS uc A REGULAR IMPACT f 1121 CONSTRUCTION PERMIT APPLICATION-COLORADO DIVISION OF RECLAMATION MINING AND SAFETY.OFFICE OF MINED LANG RECLAMATION R E S p E c //PAGE 1 EXHIBIT L EXHIBIT L - RECLAMATION COSTS SECTIONS 1 AND 2 All information necessary to calculate the costs of reclamation must be submitted and broken down into the various major phases 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 Office may request the Operator/Applicant to provide additional, reasonable data to substantiate said Operator/Applicant's estimate of the cost of reclamation for all Affected Lands. SUMMARY OF RECLAMATION COSTS,PARAMETERS,AND APPROACH This reclamation cost estimate has been performed for the initial projected 5 years of Operations at the P125 Cogburn 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. The reclamation cost estimate has been revised to reflect reasonably expected maximum disturbance during the initial extraction of the property in the areas described in Exhibits D and E.Major cost items in the reclamation cost estimate will be the backfilling of P125_S1,and the backfilling/regrading and lining of highwalls in P125A and P125B.Maximum disturbance in P125_S1 is expected in year 2 of operation when that area is fully extracted.While some backfill may have been completed when extraction is complete,the initial financial warranty estimate will conservatively assume the full backfill volume is necessary. Maximum disturbance in the extraction areas to be reclaimed to developed water resources is expected in year 4 with a forecast of 5,000 feet of wall open and pending backfilling/regrading and lining.If changes in planning or operational requirements require these key parameters to be exceeded an appropriate revision would be submitted as determined necessary by DRMS based on the change'to ensure the financial warranty is adequate.Roads are proposed to be developed in the setbacks to the excavations providing perimeter access to the pits during operations,and around the lined reservoirs or rangeland post mining.The landowner considers these features desirable,and they are not included in the reclamation plan or cost estimate.Other features such as settlement basins and parking areas are included in the reclamation plan and cost estimate,however if the landowner decides they may be of benefit,an appropriate revision will address such changes. 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. 'Adequacy 2,Item 9 ik; RAPTOR Raptor Materials,LLC Cogburn Sand,Gravel,and Reservoir Project February 2026 M AT E RI ALS,.c A REGULAR IMPACT f 1121 CONSTRUCTION PERMIT APPLICATION-COLORADO DIVISION OF RECLAMATION MINING AND SAFETY,OFFICE OF MINED LAND RECLAMATION R E S p E U PAGE 2 EXHIBIT L Table 1.Reclamation Direct Cost Summary Task Pit Cost DIRECT COSTS Dewater pit-initial pumping P125A and P125B $77,774 Dewater pit-continual pumping P125A and P125B $5,411 Excavate pit bottoms for liner material P125A and P125B $11,733 Haul and push liner material to pit area P125A and P125B $34,357 Mix material for liner P125A and P125B $7,243 Compact liner P125A and P125B $7,743 Excavate pit bottoms for P125_S1 backfill deficit P125A and P125B $11,726 Haul backfill material from overburden stockpiles and pit bases to P125_S1 P125_S1 $778,145 Excavate pit bottoms for liner backfill P125A and P125B $23,452 Haul and push subsoil from pit bottoms to grade over liner P125A and P125B $64,108 Grade subsoil over liner P125A and P125B $57,663 Rip pond banks and P125_S1 P125A,P1256,and $12,697 P125_S1 Haul topsoil to pit areas P125A,P125B,and $22,211 P125_S1 Spread topsoil on reservoir banks and backfilled areas P125A,P125B,and $5,007 P125_S1 Seed banks of ponds and P125_S1 P125A,P125B,and $34,005 P125_S1 Demo and remove concrete and conveyor N/A $83,262 Plug and abandon monitoring wells N/A $7,809 Mobilization and Demobilization N/A $10,061 SUBTOTAL DIRECT COSTS: $1,254,407 RAPTOR Raptor Materials,LLC Cogburn Sand,Gravel,and Reservoir Project February 2026 MATE RI ALSuc A REGULAR IMPACT[1121 CONSTRUCTION PERMIT APPLICATION-COLORADO DIVISION OF RECLAMATION MINING AND SAFETY,OFFICE OF MINED LAND RECLAMATION E S p E c //PAGE 3 EXHIBIT L Table 2.Reclamation Indirect Cost Summary Item Percentage of[Cost/Hours] Cost INDIRECT COSTS-OVERHEAD AND PROFIT Liability Insurance 2.02%[DC] $25,339 Performance Bond 1.05%[DC] $13,171 Job Superintendent 50%[Total Job Hours]* $71,743 Profit 10%[DC] $125,441 INDIRECT COSTS-LEGAL,ENGINEERING,PROJECT MANAGEMENT Financial Warranty Processing N/A $500 (legal) Engineering/contract/bid 6%[DC+O&P] $89,406 Reclamation Mgmt/Admin 4.5%[DC+O&P] $67,055 SUBTOTAL INDIRECT COSTS: $392,655 *Job hours for this project are estimated at 1,910 hrs,with a superintendent hourly rate of$75.13,based on the September 2024 DRMS Cost Estimate for the P124 Two Rivers(M2022-013)project The Grand Total Financial Warranty Amount-$1,647,062-is pending DRMS review and their cost estimate, including expenses for the State of Colorado Mobilization and Demobilization and other Indirect Cost determinations by the Division. For future 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) 10.2 23.5 30.8 64.5 Static Water Area-surface(Acres) N/A 18.2 24.2 42,4 Static Water Area-elevation(ft.) N/A 4,785 4,782 - Basin Lands Above Static Water Level(Acres) N/A 4.7 6.4 11,1 Static Water Level Volume(cu.yds.) N/A 690,269 484,098 1,174,367 Static Water Level Volume(Gallons) N/A 139,416,409 97,775,222 237,191,631 Static Water Level Volume(Acre-Feet) N/A 427.9 300.1 727.9 NOTE:All lands within the 196.4±acre permit area are considered as affected lands under C.R.S.34-32.5- 103(1)respective of this permit application and any subsequent permit revisions or amendments to the permit as originally approved.Previously affected ground prior to the onset of Operations under this permit will not be reclaimed under the terms of this permit unless otherwise re-affected beyond their original state. Public Lands and other easements and rights-of-way are offset from operations and while they may fall RAPTOR Raptor Materials,LLC Cogburn Sand,Gravel,and Reservoir Project February 2026 M AT E R I A LS uc A REGULAR IMPACT f 1121 CONSTRUCTION PERMIT APPLICATION-COLORADO DIVISION OF RECLAMATION MINING AND SAFETY,OFFICE OF MINED LANG RECLAMATION R E S p E c //PAGE 4 EXHIBIT L 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:Raptor reclamation cost estimation uses a model that attempts to replicate the DRMS CIRCES Cost Estimating Software.Where equipment ownership,operating and operator costs per hour for comparable equipment are available from recent DRMS cost estimates,they have been used. Resulting unit costs are shown in 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: • 10.2±Acres—Pit P125_S1 —South pit • 23.5±Acres—Pit P125A—Eastern pit • 30.8±Acres—Pit P125B—Central pit Exhibit L—Financial Warranty Map shows Initial Extraction as a yellow hatch area,comprising 64.8±acres. Extraction will begin in the southeast corner of Pit P125_S1 and establish a keyway along the pit boundary, then advance westward.Initial Extraction will then progress through Pit P125A,then P125B,generally as indicated by the arrows on the map.Discharge points from all three pits shall be adjacent to the settling basins,planned to be located outside the southeast corner of Pit P125A and the southwest corner of Pit P125B. There is a tank battery located at the southeastern border of Pit P125_S1;oil and gas infrastructure located at the northeastern border of P125_S1;and approximately 1,360 feet of oil and gas pipelines located between Pits P125_S1 and P125A which are anticipated to remain on the property.One plugged and abandoned oil and gas well each(two total)within the extraction extents of Pits P125A and P125B;and on temporarily abandoned oil and gas well within the extraction extents of Pit P125A;and an oil and gas feeder line crossing Pits P125A and P125B;all of which are pending removal by the oil and gas operator.Extraction will not occur within the setbacks detailed in Exhibit D—Extraction Plan of any oil and gas infrastructure still in place. Perimeter keyway extraction will maintain a perimeter slope no steeper than 1.25H:1 V,except for depths greater than 23 feet below ground surface(bgs),which will be extracted at no steeper than 3H:1 V(refer to the Slope Stability Analysis addendum and supplemental letter dated July 1,2025 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. RAPTOR Raptor Materials,LLC Cogburn Sand,Gravel,and Reservoir Project February 2026 M AT E R I A LS uc A REGULAR IMPACT f 112]CONSTRUCTION PERMIT APPLICATION-COLORADO DIVISION OF RECLAMATION MINING AND SAFETY.OFFICE OF MINED LANG RECLAMATION R E S p E //PAGE 5 EXHIBIT L 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. Please Note:The graphic representation of the Initial Extraction Area and directions are idealized and may vary slightly in shape,size,and location presented based on conditions encountered in the field.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.Any change in location of stockpiles will be addressed in an appropriate revision as determined necessary by DRMS based on the change2. 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±tons but could be faster or slower. Starting out in the initial projected 5 years of Operations,and as necessary thereafter,necessary warranty can be estimated and adjusted based upon the projected Life of the Operation and the progress of concurrent reclamation.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 64.5-acre excavation across Pits P125_S1,P125A,and P125B will result in creation of approximately 14,126 feet of external perimeter pit wall(estimated at ground surface level).During the same time period,Pit P125_S1 will be backfilled;P125A will be largely reclaimed;and P125B will have completed extraction operations with lining,regrading and topsoiling of the pit walls underway. It is important to note that the financial warranty estimates the closure cost of the operation to reflect reasonably expected maximum disturbance during the initial extraction of the property in the areas described in Exhibits D and E.The cost estimate then reflects reclaiming the projected excavation and reclamation at future points in time based on the assumed extraction rate and sequence.The actual extents and shape of the excavation may change,and actual progress will be addressed in the annual reports.Any change in location of stockpiles will be addressed in an appropriate revision as determined necessary by DRMS based on the change'. Based on the current mining plan(sequence and extraction rate),and understanding of the various reclamation cost components,Raptor has established the following key parameters to conservatively establish a maximum disturbance that could require use of the financial warranty bond for reclamation by the DRMS.The primary cost drivers and maximum extents are: - Complete backfill of Pit P125_S1,estimated at approximately 550,000±cubic yards of fill - Lining,backfill and regrading of up to 5,000 LF of final pit wall - Topsoiling and revegetation of up to 50 acres of land above static water levels NOTE:The timing of these conditions is not concurrent,however they establish a worst-case scenario that is unlikely to eventuate.The extraction of Pit P125_S1 is expected in year 2 of operation with backfill starting the same year.The maximum exposure to un-reclaimed highwall in the lined reservoirs and areal disturbance 2 Adequacy 2,Item 9 3 Adequacy 2,Item 9 RAPTOR Raptor Materials,LLC Cogburn Sand,Gravel,and Reservoir Project February 2026 MATERIALS uc A REGULAR IMPACT f 1121 CONSTRUCTION PERMIT APPLICATION-COLORADO DIVISION OF RECLAMATION MINING AND SAFETY.OFFICE OF MINED LANG RECLAMATION R E S p E //PAGE 6 EXHIBIT L requiring topsoiling and revegetation are forecast to occur in year 4 of the operation by which time the backfilling of Pit P125_S1 is forecast to be 75 percent complete.While of lesser impact to the financial warranty total,dewatering of the pits to enable reclamation is estimated based on the maximum exposure (year 4)scenario,where P125A has been fully extracted and P125B has been approximately 50 percent extracted. 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 exceeding the limits described above. In the following breakdown of components for estimating reclamation cost,factoring of the 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. DEWATERING Raptor has calculated the dewatering cost estimate based on a pit configuration that aligns approximately with the worst-case liner scenario as presented in Exhibit E Table E-1 and described in the"Liner"section below.This scenario occurs at the 4-year mark,when Pit P125A has been fully excavated,and Pit P125B has been approximately 50 percent excavated.Pits P125A and P125B will be in an unlined state and would recharge to static water level requiring dewatering of the pits to allow reclamation operations to be completed.The reservoir volumes for the full extraction of P125A and P125B were calculated using a 3D computer-aided design(CAD)program using the stage-storage curves for the static water surface elevations(WSELs)listed in Table 3.The initial dewatering volumes used for the cost estimate were the entire reservoir volume of P125A and 50 percent of the entire reservoir volume of P125B.The cost was based on the use of five pumps working simultaneously.Determination of static WSELs for each pit is detailed in Exhibit D—Extraction Plan. Table 4. Initial Dewatering Cost Estimate Pit Reservoir Vol Static WSEL[ft] Total Vol[gal] [gal] P125A 4,785 139,416,409 188,304,020 P125B 48,887,611 4,782 Unit Cost: $0.000413 Total Job Cost: $77,774 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).Inflow was calculated proportionally in accordance with the length of pit wall that will be exposed at year 4(5,000 feet of exposed wall per the worst-case liner scenario)according to the mining-regrading schedule in Exhibit E Table E-1. RAPTOR Raptor Materials,LLC Cogburn Sand,Gravel,and Reservoir Project February 2026 M AT E R I A LS uc A REGULAR IMPACT f 1121 CONSTRUCTION PERMIT APPLICATION-COLORADO DIVISION OF RECLAMATION MINING AND SAFETY.OFFICE OF MINED LANG RECLAMATION R E S p E //PAGE 7 EXHIBIT L Table 5.30-Day Continuous Dewatering Cost Estimate Pit Inflow[MGD] Pit wall length[ft] Pit wall length exposed[ft] %of Tot Pit Inflow Inflow over 30 days[gal] P125A 0.17 5,166 2,200 42.6 2,171,893 P125B 0.56 5,940 2,800 47.1 7,919,192 Unit Cost: $0.000536 Total Job Cost: $5,411 The total dewatering cost(initial plus continuous)is estimated at$83,185. 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 Based on the forecast mining and reclamation schedule shown in Exhibit E,Table E1,the worst-case scenario of exposed pit wall requiring liner installation, backfill and regrading occurs in year 4 of operations, with an estimated 4,985 LF of wall un-reclaimed. Raptor are allowing for a maximum of 5,000 LF for financial warranty calculation. Liner installation was separated into four stages for the purposes of cost estimation:ripping liner material from the pit floors,hauling and pushing liner material to the pit walls,mixing material for the liner,and compacting the liner. For financial warranty estimate purposes, liner material was assumed to be sourced from the base of Pits P125A and P125B and installed within the same pit it is sourced from. Pits P125A and P125B will require an average of 1.4±feet of pit bottom excavation to supply the liner material.Liners will be installed at a thickness of 4 feet on the slope with a 4-foot-by-4-foot keyway where applicable to the bottom of topsoil. Half of the liner material was estimated to require mixing; all the liner material was assumed to require compaction. As described in Exhibit E, other materials suitable for constructing the liner have been used in previous liner construction including clay lenses which if encountered would generally be stockpiled on the pit floor,and in some cases,topsoil is suitable.The approach for financial warranty estimation however assumes all material will need to be ripped. Surface areas for liner installation were measured based on the above-described mining plan,further detailed in Exhibit D—Extraction Plan, in a 3D CAD program.The exact location of the pit walls that will require reclamation despite the detail considered in the mining plan cannot be projected with certainty as operational requirements may dictate certain sections of wall not be lined and regraded for management of drainage,access,or other reasons.An average area per foot of highwall is used to support the financial warranty calculation.Estimated exposed wall area and keyway length are proportional to the total pit crest length'.As material 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 6 below. 4 Adequacy 2,Item 29 RAPTOR Raptor Materials,LLC Cogburn Sand,Gravel,and Reservoir Project February 2026 MATERIALS uc A REGULAR IMPACT f 1121 CONSTRUCTION PERMIT APPLICATION-COLORADO DIVISION OF RECLAMATION MINING AND SAFETY.OFFICE OF MINED LANG RECLAMATION R E S p E //PAGE 8 EXHIBIT L Table 6.Regrade and Liner Volume Calculations Pit4 Activity Wall Area[sq.ft] Wall Depth[ft] Keyway Length[ft] XS Keyway Area[sq.ft] Material Vol[cu.yd] P125A Regrade 196,372 N/A N/A N/A 93,346 P125B Regrade 146,437 N/A N/A N/A 67,925 P125A Liner 196,372 4 1,913 16 30,490 P125B Liner 146,437 4 2,203 16 22,737 Haul distance was calculated as an average of the of the distance of liner sources to the excavation walls assuming most liner material will either be excavated floor material (shale or claystone) or clay from lenses encountered during mining set aside within the pits at an average haul distance of 450 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 below,which indicate typical dimensions used in the calculation of regrade area and liner and backfill volumes for this cost estimate. Typical Liner and Regrade for Extraction Limit Wall— Final Reclamation — � — Original Ground Surface Sequence so. 1. In cycles • Establish line in keyway w wK Static Water Level • Install liner in 6"lifts 23r wK (vanes) • Backfill to 3H:1V wn 2. Replace topsoil wN wN ww Liner Groundwater Level wwK w�"'v'w;n,` Backfill at 1:25H:1V slope 3H:1V slope to 23-ft depth wv�M ,µ Unexcavated aµ^^^n,K Perimeter Wall 3H:1V slope """w�,� below 23-h depth " .r. Bedrock K e Yv+ay Figure 1.Typical Fully Reclaimed Liner and Backfill Construction Haul distances from stockpiled backfill materials are expected to be very short,with material primarily sourced from pit floor or temporary stockpiles strategically placed near areas that will require regrading as excavation advances.Equipment 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 7 below.The estimates assume use of Caterpillar(Cat)D8 class dozer equipped with a ripper,for ripping, pushing and mixing material,Cat 966 class wheel loader loading generic tandem or tri-axle 12-18 cy gravel trucks,and supported by a Cat 120 class grader and generic 3,500 gallon water truck to load and haul material when necessary,and a Cat 815 class compactor. RAPTOR Raptor Materials,LLC Cogburn Sand,Gravel,and Reservoir Project February 2026 M AT E RI ALSuc A REGULAR IMPACT(112]CONSTRUCTION PERMIT APPLICATION-COLORADO DIVISION OF RECLAMATION MINING AND SAFETY.OFFICE OF MINED LANG RECLAMATION R E S D E //PAGE 9 EXHIBIT L Table 7.Reclamation Liner Installation Cost Estimate Activity Initial Vol Swell/Compaction Loose/Compacted Unit Cost Total Job Cost [cu.yd] Factor Vol[cu.yd] [$/cu.yd] Rip 48,141 1.215 58,491 $0.244 $11,733 Haul 3,337 1.215 4,054 $1,207 $4,893 Push 44,804 1.215 54,437 $0.541 $29,464 Mix 24,070 1.215 29,245 $0,248 $7,243 Compact 58,491 0.91 53,227 $0.145 $7,743 Total Liner Cost: $61,076 BACKFILL Backfill requirements to cover the liner in reclamation of pits to create lined reservoirs is described in the Liner section.Similar to the liner material,liner backfill for purposes of financial warranty estimation will be sourced from bedrock at the bases of Pits P125A and P125B,which will require an average 3.1±feet of additional excavation.Additional allowance is included for backfilling Pit P125_S1.The backfill volume of P125_S1 is 550,000±CY. Raptor's plan for backfill will be achieved using a combination of excavated overburden from the site which will be strategically staged for backfill use as reclamation progresses,supplemented by imported material from nearby sites P115 Kurtz(M1999-006)and/or P122 Bearson(M2015-003)or excavated clay and shale from the bedrock beneath the sand and gravel deposits.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.Material that will be placed as backfill in Pit P125_S1 is assigned a lower swell factor because of minor amounts of natural compaction that will occur as the material is placed into Pit P125_S1 and tracked over as part of normal backfill operations. Excavated overburden material is estimated at 421,323±BCY. Raptor understand the DRMS for financial warranty calculation purposes will not accept that Raptor supply its own backfill from adjacent permitted sites;therefore the backfill deficit in Pit P125_S1 (65,169 CY)is assumed to be sourced from the bases of Pits P125A and P125B,and will require an additional average 1.7± feet of excavation to supply.The cost estimate for backfilling Pit P125_S1,summarized in Table 8 below,is based on equipment costs taken from the recent DRMS-provided P124 Two Rivers(M2022-013)cost estimate.With the exception of a compactor,the same equipment fleet as used for liner construction is assumed. Table 8.Reclamation Backfill Cost Estimate Initial Vol Swell/Compaction Loose/Compacted Activity Unit Cost[$/cu.yd] Total Job Cost [cu.yd] Factor Vol[cu.yd] Rip(liner backfill) 132,734 N/A N/A $0.177 $23,452 Rip(P125_S1 backfill) 65,169 1.15 56,669 $0.207 $11,726 Haul(liner backfill) 9,071 1.215 11,021 $0.993 $10,948 RAPTOR Raptor Materials,LLC Cogburn Sand,Gravel,and Reservoir Project February 2026 MATERIALS,. A REGULAR IMPACT f 1121 CONSTRUCTION PERMIT APPLICATION-COLORADO DIVISION OF RECLAMATION MINING AND SAFETY.OFFICE OF MINED LANG RECLAMATION R E S p E c //PAGE 10 EXHIBIT L Haul(P125 S1 backfill) 477,9925 1.15 549,6905 $1.416 $778,145 Push(liner backfill) 123,663 1.215 150,250 $0.354 $53,159 Grade(liner backfill) 161,271 N/A 161,271 $0.358 $57,663 Total Backfill Cost: $935,093 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),to the entirety of the backfilled disturbed surface for Pit P125_S1,and for minor ancillary areas used for parking,storage and ponds.Topsoil that is removed prior to extraction will be stockpiled on-site and used as the topsoil source during reclamation.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. Based on the forecast mining and reclamation schedule shown in Exhibit E,Table El,the worst-case scenario of surface disturbance or regraded slope area requiring topsoil replacement and revegetation occurs in year 4 of operations,with an estimated 23.6 acres of surface area un-reclaimed.The cut slope surface area above the static WSEL was calculated from the reclaimed surfaces in a 3D CAD program as 4.7acres and 6.4 acres for Pits P125A and P125B,respectively.Including the 10.2-acre backfilled surface of Pit P125_S1,and 1.5-acres of other areas external to the pits,it was estimated that topsoil will be applied to a total of 22.8 acres.The exact location of the pit walls that will require reclamation despite the detail considered in the mining plan cannot be projected with certainty as operational requirements may dictate certain sections of wall not be lined and regraded for management of drainage,access,or other reasons.An average area per foot of highwall is used to support the financial warranty calculation. Topsoil application was separated into two stages for the purposes of cost estimation:hauling topsoil from the temporary stockpiles to the areas required,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 estimate for topsoiling the various areas,summarized in Table 9 below,is based on equipment rates taken from the recent DRMS-provided P124 Two Rivers(M2022-013)cost estimate.A similar equipment spread is assumed as in the previous liner and backfill tasks.The topsoil removed from each pit prior to excavation is assumed to be stockpiled in designated stockpile areas and returned to the pit surface as topsoil during reclamation.The average haul route distance from the topsoil stockpiles to the areas required was estimated at approximately 640 feet. Table 9.Topsoil Application Cost Estimate Activity Area[sq.ft] Topsoil Depth Initial Vol Swell/Compaction Loose/Com pacted Vol Unit Cost Total Job Cost [ft] [cu.yd] Factor [cu.yd] [$/cu.yd] Rip 993,169 N/A 22.8 ac N/A 22.8 ac $556.58/ac $12,697 Haul 993,168 0.5 18,402 N/A 18,402 $1.207 $22,211 Grade 993,168 0.5 18,402 N/A 18,402 $0.272 $5,007 Total Topsoil Application Cost: $39,915 5 Adequacy 3,Item 8.c RAPTOR Raptor Materials,LLC Cogburn Sand,Gravel,and Reservoir Project February 2026 MATERIALS uc A REGULAR IMPACT f 1121 CONSTRUCTION PERMIT APPLICATION-COLORADO DIVISION OF RECLAMATION MINING AND SAFETY.OFFICE OF MINED LANG RECLAMATION E S p E c //PAGE 11 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,the cost estimate was performed for the fully extracted and reclaimed reservoirs and backfilled Pit P125_S1.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 was completed using the primary/preferred seed mixture in Table L. 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 is presented in Table 10 below.Equipment typical for these tasks is assumed including a tractor towed spreader for application of fertilizer,boom spraying for weed control,and towed drill seeder for planting seed.This unit cost includes the cost of seed and fertilizer,their application,tilling,and mulching.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 Estimated Failure Initial+Reseeding Pit Disturbed Area(ad Rate Area[sq.ft] Seed Cost/Acre Total Job Cost P125 S1* 11.7 25% 14.7 $1,192 $17,482 P125Aand 111 25% 13.9 $1,192 $16,523 P125B Total Reseeding Cost: $34,005 *Includes the 1.5 acres of areas external to the extraction areas,most of which are adjacent to P125_S1 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 P125A 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 number of concrete footings,spaced every 40 feet to support the 40-ft conveyors sections along an estimated 1,430 feet to conveyor to be relocated,is estimated at 36 footings6.Footings will be hauled to the adjacent M-1999-006 Kurtz site for processing and recycling'.The conveyor itself is 3 feet wide. 6 Adequacy 3,Item 7 'Adequacy 3,Item 2 RAPTOR Raptor Materials,LLC Cogburn Sand,Gravel,and Reservoir Project February 2026 MATERIALS uc A REGULAR IMPACT f 1121 CONSTRUCTION PERMIT APPLICATION-COLORADO DIVISION OF RECLAMATION MINING AND SAFETY.OFFICE OF MINED LANG RECLAMATION R E S p E //PAGE 12 EXHIBIT L The cost estimate for conveyor decommissioning,summarized in Table 11 below,is based on a June 2025 cost estimate provided by Divide Constructors for conveyor decommissioning at the adjacent P115 Kurtz site(M1999-006). Table 11.Conveyor Decommissioning Cost Estimate Conveyor Elements Section Length[ft] Unit Cost Total Job Cost Elevated Conveyor, Bridge Crossing,and 1,430 $58.23/LF $83,262 Concrete Blocks PLUG AND ABANDON MONITORING WELLS Plugging and abandonment of five monitoring wells is estimated at$7,809. MOBILIZATION AND DEMOBILIZATION 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$10,061. DEMOLITION OF STRUCTURES No structures are present within the project boundary;therefore,no structure demolition will occur, Please Note:Since there is no possibility of the applicant fully reproducing the Division's methods,using similarities from past DRMS 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. 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CENTURY LINK / / � 28 ��, w /: COMMUNICATION BOX PRAIRIE DOG COLONY / I ,•; � l-ISIZ COGS( /?N j�9(PA) ` - ` ':^® ® / /.`, 30 UNDERGROUND WATER MAIN CITY OF THORNTON • 333296 1 / 50 PERMANENT THORNTON .;;:I «- T-) / "j u " ' I WATERLINE EASEMENT Q / m /• , i l:I STRUCTURE ON-SITE RIPARIAN WOODS , R' MIL' rr `l • / c iljUsc,�t-/`' �' ` 0 % USR-COGBURN(�-Z9(PR) v l \ "•�'.1 /'.: 11 27 AGRICULTURE DITCH '-` �/ "" y '-` _- I 1 ' / I • "..51 CONCRETE IRRIGATION DITCH, SEEP PRODUCING WELL HEAD `* WALE /,`' ` - m •O 16 \ 1° (� ® / I u ;`.I 12 DITCH, DIVERSION STRUCTURE ��i N \_ 30'PIPELINE2/GHFOF-WHV :� 1^ 13 UNPAVED ROADS rn - O O w w RECEPnoN'No.36z3z93 �, © 40 T.C.E. FOR THORNTON I /. APPROXIMATE PLUGGED & •/ o .I O MI • , N •C I l� N. I ;A/TERL/NE EASEMENTr.' t4 UTILITY POLE, OVERHEAD UTILITY LINE ��) ABANDONED WELL HEAD LOCATION • � W r 1 . . .---- . --/ © 632 1 ' ` 15 WATER WELLIIC 4 1G pC • WALE ' \ arr aRr IIll• ❑9 t6FENCE & GATE \♦ . /L ❑ ❑ /, RAPTOR MATERIALS LLC SIC O �'� _ O • %�� 1 d �' Ni 18 CULVERT PIPE & BRIDGE 0 ELECTRIC METER - " _`_'•s•`� -`-"6 _ Y_ _-6-_ 3_ = s � � � = � s � t - _ _ �_ /J ONCRETE TROUGH `� • '` -m' m - - c /� - 4` _ _ _ _ _ _m _ _ m ONCRETE BOX OIL & GAS FACILITY/EQUIPMENT E ELECTRIC SERVICE 1 1° �\® 1 : ` ..m-..-=4 .' 20 POND I � • � �,. -�- r � '� iv m ` 1S m �� 21 BUILDING fs POWER POLE m m �F31I' 17 22 GAS LINE KERR-MCGEE GATHERING LLC • i�- ® / I% `„ 2g 23 GAS/WATER LINE PANHANDLE EASTERN PIPELINE COMPANY OO WATER WELL -G�/ _ �,� ® 333152- I 1�0•:i"`' . •r�" 24 GAS LINE RESOURCE GATHERING SYSTEM, INC. I / I f• MW-1 7023 / mi r • WATER MARKER ..kl. ` ` G; IIE ® GI 0 ' /� 25 GAS/OIL FACILITIES, FENCE KERR-MCGEE GATHERING LLC "•`�• "`` I'_�, -i ' I'' M //'14• ® :/ 33 UNPAVED ROAD KERR-MCGEE ROCKY MOUNTAIN CORPORATION ® WATER METER KERR MCGEE ROCKY F� �� ® MOUNT9/N CORP // , m^ 26 OIL/GAS FACILITIES (PA,TA or ACTIVE) KERR-MCGEE OIL & GAS ONSHORE, LP \ / m l G -c �� ACCESS ROAD RECEPT/0N NO.2934 \� / 27 / : +,IC - ATER DIVERSION STRUCTURE 27 IRRIGATION DITCH LAST CHANCE DITCH COMPANY CKI WATER VALVE /� 30 ® - d ro: ��/ 11 /®� ® / / ❑ // / 28 WATER WELL OCCIDENTIAL PETROLEUM (RIEMER, JOSEPH) GAS MARKER !- / / / I / �/ ��CCC ❑ 31 GAS PIPELINE SNYDER OIL CORPORATION / J �� RAVEL/DIRT ACCESS /- / �//'/- 21 �� 32 UNDERGROUND WATER MAIN CITY OF THORNTON � GATE / ` / \ • / / j/ I 34 PUBLIC ROAD WELD COUNTY DEPT. OF PUBLIC WORKS /.� �-\� i' •� /� - 23 1, / / // A ! •-)I W POST •� SUBJECT PROPERTY / • /// WARREN z9 9 L(TA) \ / 196.41 Acres NS' 11 /. / 26 r /� /�' ' I .t I ti SURFACE OWNERS OF RECORD FOR AFFECTED&ADJOINING LANDS / (±8,555,650 sq.ft.) // // ❑ /, . / I .: \ /•.. • 1 I/�/// r „i O,r COUNTY TAX ID PARCEL OWNER OF RECORD ADDRESS CITY STATE ZIPCODE 120928000002 120929000026ACORD ST VRAIN VALLEY RANCH LLC7541 COUNTY ROAD 26 3/4LONGMONTCO 80504-9514 _ /�,� 120929100052 \ // / I (,� m m• � • Jib / / - / 120932000030 ACORD ST VRAIN VALLEY RANCH LLC 7541 COUNTY ROAD 26 3/4 LONGMONT CO 80504-9574 /.. N Z9 j�L(PA) (,� \ \ / / \ ® �J/ / I I I•; \ / 120929000025 ACORD ST VRAIN VALLEY RANCH LLC 7541 COUNTY ROAD 26 3/4 I LONGMONT CO 80504-9 51 4 / 11 / / / , ��,-..:„ 120929400051 COLLINS ROBERT ALLEN 13187 COUNTY ROAD 17 PLATTEVILLE CO 80651-9105 �O / 150 iYfLL HEAD SETBACK PER - 27 , I. ono COUNTY CODE 23-3-70-E / / i 120929000047 FIRESTONE TOWN OF 9950 PARK AVE FIRESTONE CO 80504-7820 • - 25 PLUGGED&ABANDONED \ / / /i/ I 120929000046 LG EVERIST INC 350 S MAIN AVE STE 400 SIOUx FALLS CO 57104-6312 \ J/ WELL HERO SETBACK PER / 11 // " / / ' /�/ P BIT H I 720929000050 PLATTEVILLE DAIRY LLC 1919 14TH ST STE 300 BOULDER CO 80302-5321 WELD COUNTY CODE 23-3-70-E IX/7{RREN 29-1 Pf� a • .' �TYP/CALF ( \ / ' / // / i/ / , 120929000048 PLATTEVILLE DAIRY LLC 1919 14TH ST STE 300 BOULDER CO 80302-5321 / ,i - 26 Fri 11 I , • / / / ® // 1 - 120929000049 PLATTEVILLE DAIRY LLC 1919 14TH ST STE 300 BOULDER CO 80302-5321 13' �� / 18 ✓�/ I I • 120929000033 RAPTOR MATERIALS LLC 8120 GAGE ST FREDERICK CO 80516-9439 / 11 // / / / j j� 30 (,' 120933200003 RAPTOR MATERIALS LLC 8120 GAGE ST FREDERICK CO 80516-9439 J ! / r31 ' , , / / /�/ // 50 PERMANENT THORNTON I I❑ :• ' , m • 120928000002 RAPTOR MATERIALS LLC 8120 GAGE ST FREDERICK CO 80516-9439 \ 11 / j� j / �tATERL/NE EASEMENT 120929100052RAPTOR MATERIALS LLC8120 GAGE STFREDERICKCO 80516-9439 - G CATTLE GUARD • 11 / / I I - / ff 720929200028 RAPTOR MATERIALS LLC 8120 GAGE STFREDERICK CO 80516-9439 33154- c, / / 40 T.C.E. FOR THORNTON m ~ 71 CORD CHfiDBURN UNIT I (PA) / F m I: 120929200051 RAPTOR MATERIALS LLC 8120 GAGE ST FREDERICK CO 80516-9439 M W 3 7029 25 PLUGGED et ABANDONED ( I / / / WATERLINE EASEMENT HELL HEAD SETBACK PER -\)___ ..... / �/ / / 60' RIGHT-OF-WAY PER 120928000006 READY MIXED CONCRETE COMPANY 2500 BRANNAN WAY DENVER CO 80229-7029 120929000025 \ MELD COUNTY CODE 23-3-70-E �- \ 41U1/ // G�/ / / ROAD FILE 100/13412s 11 �/ / 11 / 1 BOCC RECEPTIONNo. 18820017120932101003 PASOUALE VARRA 4704 HARIAN ST, STE 250 DENVER CO 80212 VZjP� / �� BOOK 48, PAGE 237 • \ / / / / / / I 15 0 RIGHT-OF-WAY(ROW) AND EASEMENT WITHIN AFFECTED LANDS 11 / j0 O n O ® 16 m \ 12 / / i/ // �/ I I '"' RECEPTION #/ID OWNER: EASEMENT - ROW ADDRESS ADDRESS CITY STATE ZIPCODE TELEPHONE p: \:' >p '‘ for / 27.� m j s 18820017 WELD COUNTY DEPT. Of PUBLIC WORKS CURTIS HALL, DIRECTOR P.O. BOX 785 GREELEY CO 80632 970-400-3750 X 3750 / / / ;_ iy' 29 ❑ 3806206 KERR-MCGEE GATHERING LLC ATTN: RIGHT OF WAY DEPT, 1099 18th Street, Suite 1800 DENVER CO 80202 I I \ Q V / \ ® // / �® // / // / j ® �Sm❑ 1619354 PANHANDLE EASTERN PIPE LINE COMPANY ATTN: RIGHT OF WAY DEPT. 8112 WESTCHESTER DR., STE 600 DALLAS TX 75226 \ • • � 1 \ 13 / / ,//%/ / / . T T- T �I n 1629907 PANHANDLE EASTERN PIPE LINE COMPANY ATTN: RIGHT OF WAY DEPT. 8112 WESTCHESTER DR., STE 600 DALLAS TX 75226 800-275-7376 \ Q� v / / fib . O ,---). 1 �4, / / / / // (�,)JO:•:;• 1663251 PANHANDLE EASTERN PIPE LINE COMPANY ATTN: RIGHT OF WAY DEPT. 8113 WESTCHESTER DR., STE 600 DALLAS TX 75227 800-275-7377 • \ / ,�-�-�•1- • C11� - / -. a] - _____ ' r, "DS j / / / 11, / /y j I I / "a 1832625 PANHANDLE EASTERN PIPE LINE COMPANY ATTN: RIGHT OF WAY DEPT, 8114 WESTCHESTER DR., STE 600 DALLAS TX 75228 800-275-7378 • 1 / , /if �, e.•.„ • 1961825 PANHANDLE EASTERN PIPE LINE COMPANY ATTN: RIGHT OF WAY DEPT. 8115 WESTCHESTER DR., STE 600 DALLAS TX 75229 800-275-7379 1 / ® // i/ / LAST CHANCE DITCH °`;;: / / ,F/ „ `;e, 2550421 RESOURCE GATHERING SYSTEM, INC. ATTN: RIGHT OF WAY DEPT. 1999 Broodway, Suite 3600 DENVER CO 80202 •• i I // //� NO RIGHT OF WAY I :'. `10 2402534 SNYDER OIL CORPORATION ATTN: RIGHT OF WAY DEPT. 777 MAIN ST., STE 2500 FORTH WORTH TX 76102 817-338-4043 .../ //' • �"'� _ ❑ / / / , DOCUMENTS PROI/IDED OR //.' .• , �.� / / / I � 2552512 HS RESOURCES, INC. ATTN: RIGHT OF WAY DEPT. 3939 Corson EVANS CO 80620 303-296-3600 • ❑1 / / / / DISCOVERED DURING RESEARCH OLLINS PROPERTY I N. / / / / I KERR-MCGEE ROCKY MOUNTAIN • / / /,/� // HISTORIC RIGHTS APPLY j /®, 1 ACCESSORY BUILDINGS 2934956 CORPORATION ATTN: RIGHT OF WAY DEPT. 1099 18th Street, Suite 1800 DENVER CO 80202 //, / /// 1 3623293 KERR-MCGEE GATHERING LLC ATTN: RIGHT OF WAY DEPT, 1099 18th Street, Suite 1800 DENVER CO 80202 I \ / I( // / //// / 11 j j // / 3713895 WELD COUNTY DEPT. OF PUBLIC WORKS CURTIS HALL, DIRECTOR P.O. BOX 785 GREELEY CO 80632 970-400-3750 X 3750 • / /%,/ / j 11 j / " I >` 120929400051 4077028 KERR-MCGEE GATHERING LLC ATTN: RIGHT OF WAY DEPT. 1099 18th Street, Suite 1800 DENVER CO 80202 27 / / / ❑2 4083115 KERR-MCGEE GATHERING LLC ATTN: RIGHT OF WAY DEPT. 1099 18th Street, Suite 1800 DENVER CO 80202 �� OTH I 4083118 KERR-MCGEE GATHERING LLC ATTN: RIGHT OF WAY DEPT. 1099 18th Street, Suite 1800 DENVER CO 80202 4 [ / / , /� % 23 RESoiI • / / // / / / / REC No 1 1 I BURIED LINE CI // / �( '� 3713895 `,• 315477- wcR 17 CITY OF THORNTON ATTN: RIGHT OF WAY DEPT, 9500 Civic Center Drive THORNTON CO 80229 720-997-6500 1 /.• . ;��' / / /// .`..� ; c NOTE: THERE IS A DISCREPANCY BETWEEN ALTA'S BOUNDARY & THE WELD COUNTY GIS BOUNDARY LINES. IN /;/; / 11 /12 �'� ALL CASES, ALTA'S BOUNDARIES SHOULD SUPERSEDE OTHER BOUNDARY LINES. / / / // ��` WATER WELLL DETAILS /i� WARREN z9 16L Pfi I 30 DITCH R/GHT-OF-KAYO 1 120929000026 • / /• / / // ( / / EASEMENT BOOK >30, 1 GD Monitor Ground Top Costing / / PACE 278 1 Permit No. Latitude Longitude Owner Permit Status Construction Date Permit Category Use(s) • 1 Wen ID Elev. Elev. ,J / / / WARREN29 16L(P71) 0 ^� 1 / / / 25 PLUGGEO&ABANDONED j 1 + MW-5 1 l__............../ j % 17.,: 120928000006 333156- 40.189836 -104.909036 RAPTOR MATERIALS,LLC(VARRA,GARRETT) Well Constructed 8/23/2023 Monitoring/Observation Monitoring/Sampling 7019 4800.43 4798.32 / j /.!� // WELL HEAD SETBACK PER / / I / • _ = % _iYELD COUNTY CODE 23-3-70-E ❑ 315477- 40.191780 -104.904158 READY MIXED CONCRETE COMPANY Well Constructed 6/11/2019 Monitoring/Observation Monitoring/Sampling f�_ _ / m `®® 1116 ' 1 7 333154- 40.194554 -104.913611 RAPTOR MATERIALS,LLC(VARRA,GARRETT) Well Constructed 8/22/2023 Monitoring/Observation Monitoring/Sampling M 029 4792.13 4794.84 _ _ j / I -- /L__�/ 50 PIPELINE RIGHT-OF-WAY j ® I I 333152- 40.196637 -104.904997 RAPTOR MATERIALS,LLC(VARRA,GARRETT) Well Constructed 8/21/2023 Monitoring/Observation Monitoring/Sampling Mw-7 3 4797.04 4799.85 ' / 1-- �� 8��' ® �(' - RECEPTION Na 1077028 P Ir H m 702 2 • _ 333153- 40.198785 -104.909435 RAPTOR MATERIALS,LLC(VARRA,GARRETT) Well Constructed 8/22/2023 Monitoring/Observation Monitoring/Sampling 7025 4787.04 4789.63 � �_ _� / _... .,_ m 333292- 40.198742 -104.911761 OCCIDENTAL PETROLEUM(RIEMER,JOSEPH) Well Constructed 8/1/2023 Monitoring/Observation Monitoring/Sampling 1 20929000046 / 50 PIPELINE R/GHT-OF-WA _ ®� --23^ 5/TEEHSEMENT 1 m l e. 333293- 40.198796 -104.911773 OCCIDENTAL PETROLEUM(RIEMER,JOSEPH) Well Constructed 8/1/2023 Monitoring/Observation Monitoring/Sampling / i RECEPTION Na 3806206 t`��No 4083118 : , • ^ �� n _ �.,i -.�_- - ., �I 333294- 40.198760 -104.911691 ENSOLUM(THOMAS,DANIEL) Well Constructed 8/1/2023 Monitoring/Observation Monitoring/Sampling _ _ rP-+ 333295- 40.198725 -104.911832 OCCIDENTAL PETROLEUM(RIEMER,JOSEPH) Well Constructed 8/1/2023 Monitoring/Observation Monitoring/Sampling //� s _ m=,.��; I 7 333296- 40.197806 104.911750 OCCIDENTAL PETROLEUM(RIEMER,JOSEPH) Well Constructed 8/1/2023 Monitoring/Observation Monitoring/Sampling IElli1 u \ N ' / / / `� _ 31� II ❑ 333155- 40.199402 -104.914580 RAPTOR MATERIALS,LLC(VARRA,GARRETT) Well Constructed 8/22/2023 Monitoring/Observation Monitoring/Sampling M027 4786.52 4789.29 / %BASE 50 PIPELINE RIGHT-OF-WAY- :RIDGE / ❑ / RECEPTION Na. 4083115 -• p 25867-F-R 40.201879 -104.914413 COLORADO DAIRY FARMS Well Constructed 3/14/1992 General Purpose Stock a 1 All / 200 TANK BATTERY SETBACK PER / ' I I Ill M W-6 / / WELD COUNTY CODE 23-3-70-E� 333157- 40.190110 -104.9047100 RAPTOR MATERIALS,LLC(VARRA,GARRETT) Well Constructed 8/23/2023 Monitoring/Observation Monitoring/Sampling 7021 4798.21 4800.91 / / //j/ 11 // ® I r ,I 3331 57- 299543- 40.189339 -104.903950 VARRA COMPANIES INC(VARRA,GARRETT) Well Constructed 8/6/2013 Monitoring/Observation Monitoring/Sampling '� I �i MW-6 1/ / // C0 III 7021 120929000026 /�/ 59.9841 RIGHT-OF-WAY PER• 11 / t5 �� „L., II II �\ • ` • / /• ce / 7019 f ROAD FILE 100/134 /PRE. TIN . IPM NT II 333156- BOCC RECEPTION No. 18820017 (,,/' ' Eh/ BOOK 48, PAGE 237 Ifillpr •' m'� `I" II 2 543- - - - y (� e e c p o 0 o s 9 COUNTY ROAD 2f - �-. /r --y- .. ®� _ - .• COUNTY ROAD 28 . , �®�fi►m.� llf• 0, .. • ' 120932000030 \ N I / / \ `Nd 1 \ _' '.gym , 120933200003 . J ' , / 120932000030 \ o .:''::::. m 1 120932101003 ❑ y :„- „ • � I ©II . m• -'. 1 .:..i.i...,c___ ,,“, I RAPTOR MATERIALS, LLC. PROJECT: NOTES: SCALE: 1 inch = 200 feet 8120GAGESTREET Cocpurn Sand , Gravel and reservoir Project DATE: 29 AUGUST 2025 TELEPHONE: COLORADO(303) 66686657 DRAWING: Na ER AOLSI:c REVISION: 26 JANUARY 2026 Exhibit C- 1 • Existinc Conditions Vap PAGE: 2 OF 3 /'-- - \ I I I ' / r' ' ) I(i/ /�'(//////(' ill '\-- i 7 // /Jar f /r y/� /" /� \^ _�� ` � V - •. ` �/ // �I ��f� Ian / I r /��j� �/ Ilt�ll: l +' 'J// , 1 ( J ) (11 S • ' r / ✓ // �/•/"� f_rr r 3 --- \ \ \ ✓ �l� ) i ( III, // /� ) //I 1�r / ` / 1 I\ 1 / _S\9 // / �Ort (lJ1 /r / , r �'/�� -� ism. , _ -� - r - \ _ r �� /- / 1 \ / i / z 1 I J I // \ J,� / /i r,/�' //15 �� l s t I I (11 III � (r�/ .'.< NOTES LEGEND / ( ` r I / I l ( / r / / /ii ,� / �.� J ��, � -- ( ) (Jo ,' ' ! 1 \ l I I I I '::a I! f r �j// . ' ' // c J� ter/ ( / I / r I S �I • (O //i f i I ,f ,�- �,� 1 r �� 1 { 1 �l ( NMI/ r— l'il( I ,. ( / / _ ,� 1. REFER TO EXHIBIT C-1 FOR MONITORING — XXXX - EXISTING MAJOR CONTOUR 1� ( 11 1 l 1 �/�\ ( ` / r L, I � � f / ti / �\ > ( � ' � / / // c :/ / II ( !( r\ �� D /ii Ir v // \ / t 1 t r.1-' I � � -N_ r ,r / tiv f• Ind(( j I �'� � �,// WELL DATA �r J ( -r' ''-' f }{ 1 / / ( / O'\l / / // / / S J ! 1 �/ \ I � y:;::; /t :. • `. ;;, : :. 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DISTURBANCE 1N / �2 i / 7 ff / DISCOVERED DURING RESEARCH i I � ' ' r �/ �� j ~~ • BASIN#2 ` c `�w I % �/ //I DISCORIE RIGHTS DURING // • / / ) I' - ' :'';:;"_.; : '' 20FT WIDE UNPAVED ACCESS ROAD 12,796 LF (5.88 ACRES) / r ( �'`f/��// ` i �� l . ` , PROPOSED /� 441 j/ rf /' d /'� �,�? > / <� I , DISTURBANCE J ( �� `�_■ \ ACCESS ROAD •'S / // / y ; % ,a / n .` I '.: #1 70 LF r f /1 1 �� / / / / / P125A ,i�-/ / ( PROPOSED TRANSFER � ;1I �� __ ■ \ \ /// �')/ �/ ' / /' /!/ t� \� i'-• VEHICLE CROSSINGS DISTURBANCE #2 120 LF - - t / , I1 T / l ''It I / l / / AREA =23.5 AC. / //x�l / J ` �) CONVEYOR 150 LF #3 120 LF \ ' ■ \ ) \ �J / / Ill' / % PROPOSED i / / sxisnNG �� 1 / \ • / \ / / rsk 4 1 ,/ / i CONVEYOR/ / /i ' °' , . 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J ''. • • �• � PERMIT AND AFFECTED LANDS BOUNDARY \ C� S r /1 / ° ,� I�(l « \1 r ` I \ / / ✓`^:::' ",'"•:•'�-• " '. 200 FOOT BOUNDARY OFFSET-APPROXIMATE \ r / �,� , / / I � \ / \ /r y� I ill / / ,%�/ /;// //� /,'i/� /� ' //j' , 44 ' \ i / / / l _ `\ �, i r .:°.:.`..., � s ��r •I ) r I II — !/ r �7 \\ �' s ��/ ~~ .� J s \ .; :' :::.: .:;°�.,.:::: ..' FENCE ...../.:,,.,:s... / I / I IIII I / \"/ '// / ''/ / ''/ / ''/ '/ 4.3.,,,,/ /'/ / /'' / ,'' / ,'' '� 7 / it e,/ / \ 1\\ '� '�✓ 1 ■ .:...�. . 4 Y'o 1.. OOOCtf '� 1 I f '� /, ice ', \ / ( r L \� \ ::: f---,1\,\:. �:.:.;.;:;,::..`,:.: EASEMENT LINE s / I ' ir- ��((l�ll) I r� �l �/ �� /f� � �� /'�� /'�� /�'/ \� / ' /', (�(7 I�- \ _ --, y� \ c 1 �fer ..._:_ , / ••. ..1 / / / . CHf1 DBURN lX/fiRREN TRUE 1/Pf1 J �1/ I ' / / • y;�/ '/ • / \ i# „ '-) L>;, \ s \ \ --� ( „,„ fir- ,: DISCHARGE PIPE •.,,..-.::: v L -! / /, j /, / 'i / 'i / / / / �/ / /C/ �� , ` L \ \ /'� 1 ■nor �- 1? , RIGHT-OF-WAY LINE i _ 1 / / //r i / % ) " I�\ / /, / /,� /• // /ij '/ / '/ / '/ ,/�/ ,i/////� Z(--I d 1411 ` �r.� \ / L � r f i.i :;; \ J` <= "k STREET EXISTING �� I / ''l / //// r�j= �� f/� I 1 f�/ /,j/ /.i//� /,� '/j, „ / .. / '/ .„, ./%/ ' f ',,/ Z I I , \ \ /' •/ \\\ J J //��-��' _ % r / (1 / /''� j /`'�//"j /''/ /,'�,// �/�/ '/'� '/'/ /�/ / \ C \r ` I \ l L / rti" :: . ■ . ■r r\ / ) / / / 1;22 ' / r}` ( / / T / `/ ' / /�� // / j / { %/ \\ �� \ } I ':1 J%' FLOODPLAIN /�l J / / / I i t /■ r\ / rr IrI I ! 1 \.11 / / j� // / ,'//� , �� , �� , ; % / � / �/ , / HslzcoGBURNzz9r� T� / �� / ';:;..�, 1 j � / �/ / / �/ / j l �'V\ \ r N // ' .:: -.. ... ) EXTRACTION LIMITS :ir ( \ , / S ? /.f) (K ./ / , . 1 ' / ' // ' // ' // ' /, ' _ ` c \. 4 ( ,. . ! .:.:. ///', ��//� MINERAL RESERVE AREA - _ - '"l /ii`I / ///r„ r / ,� / // s ',,�� '/,/� '/,, '�, /A s�.�/�� i�` 1 ` ,�\ J �,2i �- - _ '` /i/^ - s' /s` f f"./3� Y �U f :.f' .. °.::�.•:•.;::-• WATER-FILLED AREA r. / \ / HSR COGBURN 3-29 PA �/ / �/ / • /_.,: -r.,..�.„� / / HSl?COGBURN 7 z9/P9/ / ,:_ �--- T - _ -- i/ �-,J f ,' 11 .. \ i�• �� _ l/� \ fir/ �� / � � ifz.rif:///17:: ...7:::///, / , � ,/�/ , �,,.,�..� /, / ., i�,� .,�.. .. � ` � � -. � � �� `�'� � 1 ? - � (� 1 �f( ) n ( // r) �'�•��•/::),,Iii:E. 0,- �/ I - i / " / �, �_ / i,,,;.,�i / - '� 1 N i _ l , l• S r-J . I <<-,-(` �::! 4 ) I / :) BACKFILLED RANGELAND _,,,,: %ij %- f .,/ / / / / / /// �:, s�,l ( yell) \ / i / . �� %`e"•� �� ;.x: . : ,"...,.::.. .. : C Ft//'r / is: / JiII }I �';. :;: ,'.'. ' /��- /- / �:. X - ( HSR-COGBURN4-29(P/i/ ,'( / ,, ., / /, O , " • i / ( -.. _ lcf I ) 1jl // A : /j /t REVEGETATION SURFACE AREA �// �� r // r J • / �,�� /, '7Y,// /,,j /,/j , 'i, / 1 / ' / ( `� t / f / /�� Sr' \\ \ "��. :' , :as.., J I/ /� / / l )1 / - '`,; .: • ,• /� I ` • • PIT WATER LEVEL � r �NGC - �y, fi ,,� '% '�, // '� 4,,,, '/ lh/�1RRENPOOL/NGUN/T 1 Phi / / �� l / I :. J' a 1 r' '. f LAST CHANCE DITCH BOUNDARY / �/ ITV "� \ 51. FtP � �• ( ♦I��■i ^ /,, /, j // ,' // // // // I , / / if / / / 1 / / (� 5 / /l� .�.,r'� / / / ; '/ �� \ S / . d �.,: � -=1if 1 j RIVERBANK �✓ J /ems _-. •/ / , / . / � �� 1 ''/ l ) • / / //� r / J , / �-r '/ /10 / /' / /' / \ d ) f �" ! ,r 1?)l / I'' o //l/!S(� =: ." /�/ /:' // 20 FT PROPERTY/EASEMENT SETBACK // ( HSI�COGBURN 6 29/PRJ /, /, �/ '/ �/ (., / / �/ , �/ / �/ . /' / r �"`"� / ( . '`� co 1 1 / , / r /:•''/ ! I " ijll,c (/�/� �/ // �'r ✓ 20 FT WIDE ACCESS ROAD /f G 1 - , / ' �f ' // ' / ,,,, ,ss, �j ///� 6, :„ ,�/ j 1 '' , .�s �,�,, s • \ ` _ �, I r / �. / ,y,/ 1 u t o ft��ll f/ �. ,. mot( �' � / �/ �---. � � .�� /� �/ /, �/�, �/ , � , / / � �i� 0 J ..�` �� 11 �l •'�./ /- � •� l'""1�II )II cO O(( � / f".�/r 1 I PRODUCING WELL HEAD \ />( /i /// '/ �'� '/ '' /• / '' ' / / I, 1 J / ✓ t 1 �` 211 APPROXIMATE PLUGGED &ABANDONED WELL r d ( / / / � r /////. / ///.'i. /i 'i 'i /i /i '/ 'i 'i /, /, /, 1 �c / `� 1 / .J ( / ( C `�- 5-- HSR-COGBURN 5-29(PA) / / / /, '' I( I / / c sL� 1 l J/�/ cJ / /( L •, HEAD LOCATION C / /, // /, // , "'/// ', / '/ '/ ' /% ' '/ '/% � ▪ , ,� /, 1 \ \ �. II ( �,,r; �t� f I .�� \ l 1 / /: I J/ / i / -- '/, '/,�T� '�/ ''/ '/, /, /, // / /� /, /, /, \� S 1 /. / / I /� / J1 U > GATE ! r�7 — M1� \ i-- �j/i /,'//////,,i// ,/,�� /• ,/ /,/j .,//�( /,//// •,''//// /,'//j /i,/// 'i'/j 'i''�/ 'i,'/, _\ )1■ •� �■ 1�5+ (Il / � .. "/ `� ��. I �r ( //��0�'/ J �7�4W POST �` Jji) rf/` Try • 't ,,, /�i /�/ /,//�/ /,// /, j ., // /'i/// , // / / / //////ij / / / // / \‘1/4t\%\;0117 " II !I�r l /. / \ I S ' 11 I �/ / S r 1 J,i / J .�I . - / // Jam. /j, ,�j�� /, j //, //j.L i/// // // /,/� '/,,/, '/,,j ''//'/�„/„.j '/,// '/,//j '/,/ J \ \ \� `J 1 e • ■ ) // / r::/:c3-1:::_-_-:-S-4C-1-1117:1\1G1-7'?-11:\1)-1 �' Wr I b ,�'� i / , , / / % /// ' YYY % l III \ f/ /s�� I � • /, ,` <� /, �'// / /� / 'i / '/ /, 'i / '/ '/ ii / �,, / //, /' v r II l' // /( f \ \ LI r/ I / �/ I I� / j /i>(//I:/id ; /''/ /I•/ i/�.`a/ /'i,//f ''/,/ ''/i// '/,// '//,// ''/i// ' � // '' / L]) `. .�� ' IIII 1�\— — — —��` f J J I l r� //1 / r� ; WATER WELL `I / 1 /ti ! �. . / / / . / �r - - �i- f ��/.� �{ 11 r /L1 ( ) 1 ^� ' ,/ '',//�y' ,/ 'rj E' \ I. I 1 1� � / - 7 J., :1-4,H1-\:4,F:' R f �/r. 1t/� / t/ / \ j i%,� �/ 4 �■ 1 \\ �(r - Ili . OIL OR GAS WELL l` i 11 ( ---- C `�c� _ ~ _ _ ///'// �,, / �'' / '�/ s c t - == �''f 3ABANDONED OIL OR GAS WELL �i 1l I =. �:. s� s r f r 1 Ili s\\ ` /fl{ � f / ( Jr � / /// ,i,/'� ' �� — c5 �J, e / • ® `li � > _�� " \f� !4 1 \ \tip \� ( o� //, rNS 7 �� \ / f /i U \ / /�'//� ��'/// / / • / �l l t 41 / r �f 2 _ I , • : PRIMARY y / f • rrAffMari \w\� ( \\ I1 ( / U�� G f 1� Cr / /,j /, �.- "-'`\ I// ! \� �' 1 rw�rio�ia -�� 4795 '. ENTRANCE ^ -� ..._,. .. :. LrS� ti \\\\� / I ( `� Y _ — \ i k__-*`' e �f l 11 '//�/'/� / I/ f � /11 .�'J/ ■�� ■.IL7 ' .,/ /' , a/ / // _3_�I V__L- 4790.4785 _ JJ / I • — POND �\ I !`\ „ / l l) � � 1 �l f f / ''', � J / .,/,--�ii/� � � �• - �,�/. //�% /� f // �I N Z t { 5j / 1 1 l <I\\, / I(�� / \J / \ % •'/ - �:r � f , � '/�� ^ ( i` /�', I ";� t 1 1 `r l / \ ds, / ) .NC l 1 J - ` \ 1 \ :� 1•' \ \ ( / `�I �' ''/ / ''/ / 0 1`� n/ :1 II I a j r s�C f k I 1 c,,,, -_, / fir/ \ �v .'• I ' // ',,/ \� 7 ' I :1;: ,�j S \ \ t J \ ��9 / r/�v, , i ' ,r-‘„ 1J ( t, /�% ./ '/,Vsz.,"/'�, ( i� 3 1 " 151: I rJr z ----- t POND \\ \ \ \ C� /i 1 I J I a //�/' /'''/� ` A I 1• 1l :t!• \ l 4,: �1 tip\ ; = I .,III, � /\ \ \ \ r `� r / �/�'/ :1 Y"` _� 1 r AREA AREA, BACKFILL REVEGETATION RESERVOIR AREA, AC. SLOPE \ \ I r l S �. ��.•� S // �r // \, //4)// '' /� %�//' f < I I 1 t.If :r{ / v ` _s\ ji r( , DESCRIPTION AC. AREA, AC. AREA, AC. (WATER SURFACE) GRADIENT �. '> / . / , /•/ / / ; '/r////{/N ram:. \V \ vv vv, ji „ J/ ,r� / l ;/ /�///••,'',;i/��''�� /��/, �// I i I, �I , .: RELATIVELY - - - - , -. ., � WARREN29 10L(PA) , , ,/�,,/ ,,� �/, _ / .1 a yl f � ' P125_S1 10.2 10.2 10.2 NA FLAT \ \ ' p.. _ .' f /�/ % / 'f' ` II : 1 r P125A 23.5 NA 4.7 1 8.2 3H: 1 V \ \ I \ \ /� 1` 1 :, / /,` '/,��'''�/ / DEVELOPED WATER RESOURCES ,� I SEEP DITCH \ / \ 1 i ( y7,, / / / WITH GRASS EMBANKMENTSI 1 : �I P125B 30.8 NA 6.4 24.2 3H: 1 V \ \ \ ` '�Ao c I ,� 4, /,/,% /,''9,',% � // -7,., --" ; I I •; �Il�.- EXTERNAL TO PIT RELATIVELY \ \ \ \ \ fj , -\r, / /,'� /,� / �,,/�/ '' /////,‘,1) II �I" I DISTURBANCE I 1.5 NA 1 .5 NA FLAT \ ' /' / ) � ` J '' 11, (:: TOTAL 66.0 10.2 22.8 42.4 o \ \\ r o \v5\ �' //` '/�'/ ''/�/ /''i, ',�� ''// ^1Q - J / 1 ` 1!.,. ' I I I \ \ \\= 1 �� f1\ s"S r I '/,P/� '/,/, /,�j/'/ �4j-'GsP I ( li" il ACCESS POINT#2 FOOTNOTES: 111 r,r� f ,, r I • , �/ �/ I I :. 1. INCLUDES AREAS DESIGNATED FOR PARKING/MATERIAL STORAGE, SETTLING BASINS, AND CONVEYOR CROSSINGS lir \ N N - �I- - \\L� 'lJ•� / '/ ��''/ ��''/i '',I/// / 1 1 I It -; THAT WILL BE RECLAIMED FOLLOWING CESSATION OF MINING OPERATIONS / S / / / II POND - -,. S/ •�1 \ \ 11 •r _.-- / /, // ( /<, r// ///: ---/I ------,3H:iv _I L---._-' (((: " I)) i r m Z1- " �-__ - _ _ -:79,...:4479r0 1 P-125A 11" - . -----_ r 1/ "} - = - — -_ - ,!� DEVELOPED WATER RESOURCES ■ •: :;� / --� = / • - _ �9 r � '� J/ ~'� z — _ `G \ e'11h6.� I WITH GRASS EMBANKMENTS I•:- '' .' _.:: ,:: .,>,..-:.. / ( � ... jam/ L� , — \ ti• , j4 E,.;, / / /yyyn y; ` ),! ��_ `_ �\�- - - - -■ 1 t \ A' r" / ArT 1%1V 11 1 , z. ffaa \ Z. V 1' \ \ C4,,,j / / \;) 3 )� ► : r vz � :. I 1f I `�Jv, tom= I V \ y 1 -/ i \ , i!ot k / __ I \ C , -7 /'7 p- rw 7 /7 / , ,,, [,-, r. 1, C \ \ 7 / 1 ''' , /: [ ;/// \,/,11, yi,/,,, ,__,_, IF ri , „... , LINERS LOCATED UNDER THE e. - 00._4790�47g5 _ _ ) ` J5 J REGRADED SLOPES FULLY _ _ < + :, \,..___ >"9 �� r- ""_ �� \_ _ - 3H�V 1 >: I /'AND XTENDING FROM TOPSOIL I/ ,S �, _ / _�/ I : SEEP DITCHTO KEYWAY IN FLOOR OF 1/ 11 /- /��_'' _ _ , _ `� , " ,,� EXCAVATION. / _ _ .....�__ _ � A.,..: 1 ' fi -ru \ 1 TO BE BACKFILLED / _ � ,./ � J 1 ` " �, ( ( //FOLLOWING --...:,..,/,,., 1� 1 fl 1 EXTRACTION _ I ( J ) ( Z / I • III / � �, / ( t // / I 1 :. „E:Nco.fm,\://ASSINI\GTH(bE/EJXCAVATION I l �� / I \I'l :'•k • ii Ir/ .�' // I I ', : y ` ` ' r I I I 1 .: 1 (�I'ti.( 1 ti 5 U i N ■1 • t I I ( *)a ---v- -- -- / ... {may • ■ �' _ — : . •. ,., r l :I I COUN7YROAD 2< ` 1 I 11 1 COUNTY ROAD t \ (ri) C . -7---__-_,---____ .. .1. .I \ I I Sl I�p >J ri ff _-=——== =�— �`�N. _ .. - / ■ 1 ` .› �✓ I ( II ACCESS POINT#3 = = . . . . . ' � \- / ,r• . P.•'D � _ EXISTING CONTOUR R ■ I 1 S., I 1 � INTERVAL: 1 FEETq % ( I r - - � �—�- - � I I /\ � = __ _ _-f=- 1=fi ,`,1!! ?�( ( . � 1 1 ,7 ' � \ . PROPOSED CONTOUR / I I I I � - . _`_ - � � 1 . l ( : :\� � _ l �� ' � , , _ I ( ( I / __ _r __= .� ,k�\ 1\ 1115 II I •:::,,,:,,,--__ z� ^ POND , INTERVAL: 2 FEET�- I 1 I I 'jl), l �z, ` \ i �1�- ", =--- ��\�.,\‘1t it .1...al i, I - x.. - . . �,"' /. . 1 R MATERIALS, LLC. PROJECT: • NOTES: SCALE: ;9inGSoO;e:t RAPTOCoc3urn Sand , Gravel and eservoir Project D FREDERICK, COLORADO 80534 r i REVISION: RAPTOR DRAWING: Exhibit ecIamaton Plan Map PAGE: 1 OF TELEPHONE: (303) 666-6657 MATERIALSuc / � ) /�. ) 1 1 / / sr / l /,, , r --�, _ \ �_� / - - -/ S �/ i 1 : :: II ./ ( //1 • 1 ( / ((( t /r ° / /� ref 5 - - \ ` \ J/ ,? ) / / 1/1/ \ 1l/ /// 1 � 1 (fIt�( ! /,_, I Glid i �S 'f_ V'j ( \ _ r ,� , /,_ ` S / l I \ /�l'/ / t )C.111111.' /(t r / / I fIII)/ / - /-cb 7'/ 1(j/ / ...„,"..../ /�J , � !// L s T s , , II /�f ;' LEGEND I ( < Z / ( )/(� r / /ii / -� � t / �,r( /` ( 1 ( 1 r ( 1 ` l1 f /� ` .// C �t`� ! / PI / ' / I IS/<I ' (o' / /i //z f -- i / L ,f ~ f ,r L1 r �)\ / /i f { I �l ( 1 \i / �- ' I' Il( I I: �I II // / :. . ' .,f - - XXXX - EXISTING MAJOR CONTOUR 1\ _�- v ( 11 / / / 1 ) \ ( / \ / I c _ ,, F i� �- r r / �` f I '� /l y: :.;.. ., l/ --r ) \ / /f II ( 1 / / / I l� ( � `-� /j//� y G / �� j I ! J r ,f IS ��/ l �f 1 J� / / \...1 1 < I `d( �I J j�I I �� ~ J �' EXISTING MINOR CONTOUR // / ( -...1/ I �/ I( t Q3 d s ( , _ / r S) r Ls 3 / / \ �\ f ) 1( /� \ \ 1 \ ((t1 I I f / 'I . : f -,S .\ `. ..:. ::,,>.,- / / / .� j I 1 SII / v' (` ■ y µf\ 1- ii= � -IPE SUSPENDED OVER RIVER \..: ....,-..?,,( 1 ( '-- I / • ,-•.,-� / \ \ 1 �i 1 r S 1 1 / "�.:...: '✓ ( ( ` /ffff ) 4 l \ \� ` 1 �■� - - _ �^,_�/�r� �� / 1 < -' - f / ^ ` �1 ) :,) - XXXX - PROPOSED MAJOR CONTOUR /l / \ `�\ 1 /r f J i .� Z / / / ) 1 j r \\\ 1 1 \ • 1 1 / f/: ; // -� \ \ 1 c - �.�(�I Ti- .. .. _ - �,:r `�. / / ,--/ f / �/'� N L /� " -1 / -^ ,i )1 , \ \ //1> I / .-`. , f 'rl,,,\ 1 ` I - � � �1 c (\Ji& ,// iPROPOSED MINOR CONTOUR /1 1 / ' ��- f `I �I \ \ / / 1 120929200028 7 /� it i N f �'1 r 1 _ 1 ( 1 \ 1 ` I i / 120929100052 -- G�✓ �-ti^� d 1 f 1'••:.. ;: f' PERMIT AND AFFECTED LANDS BOUNDARY l / ', '..• •,..-:`•;'-'.+�' 200 FOOT BOUNDARY OFFSET-APPROXIMATE --' r / \ti \\1>� / \ / \ / / / ,Y//(/j '',/ ', X// \ 1 120929000033 , �' .� ' .. :...• ,. :. -- �J / �� fi" PV(' RISF / `\\\�\`\� / / � /// ,/ / '//� 'j/ ' /j '/'/ / /j / / [�` ^'l/. /` / ' �l�(• ✓ s \r \ ` ;`:•Y. .,':J:�.1/.'•`:r'';�:.~ s ..? 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I ,,,,..1,,- ;i // �� r J 1 / / ...� / '. / / / / / / / r� / /' /7 1 • \ f ( / / % / \\\ I •) / I 1 cc I ( \ 1r j.• / / ( --/�� 1 _.‘--;„...,„,...../ �! // '/ '/'// '/''/ '//333295- , � / - • = ~ , BACKFILLED RANGELAND ( ill n� /f r EEK < 1 '/,'� ', / '/ / It 1 / / / z_, • w• / :/ t� �1 ( -•° � / fit' / . , V� -._� ,. ,loq , --;- , - i�t / ''i j ''i / 'i'/ 'i,/ 'i, WARREN POOLING I/SI) /,/ / /^ 1/ ♦ / �/ / / // // =1 fy17 // - t� y / / ) KEYWAY oND �ti / . ✓/ / /, / '. / / / '/, `.� \ S / I i� �/ P • I /.. / I / / f 1 fl xJ \ CONVEYOR j,y� /1 f/ :�_,� /�J `, S / ..��✓ ( t / / / j / / / �i 'i 'i 'i / 'i '/ ' WALE N. �/ / r) . / ../// T I 1 • � ,//f�/�� ) ;i -j / " / - . . - . . - . . - / ,, r ,- �( z f ( y yl \ / '/, ,/ '/, / /./ �.�,,�.,1/ '/ '/ '/ '/ �/ \ I .' ' // .;•/ff o / tti : /: /!} / /,/ /,�/ /, /; %fir •, /, '/ '/ r//�/ /, 1 f _ / I •'/ l vi jor 7 /S / / �z PIT WATER LEVEL f // • / P ( �/ HS2 COGBURN 6 Z9�SIJ % /, �� '. '/ ////�,</. //i '/,///i,'/, '///� ''/�� ''/%/ �'/ r � /�r r � \ 1 //, /1 I '' / L t r(IIf / /<// �.Lr� / / / /, �. v /r X EXISTING SURFACE / /..'/ f S //j/ / �. ✓ LAST CHANCE DITCH BOUNDARY /(,)1 j. . )/� I) I 1 r / „ ,• �� •/� /,, / P-125C MINERAL // '/ // ', � // I / �`` �� r' //jfG r/Pi C� - - ''i / '' /% ''�� '/ �' �//, ./, �''/ /''/ ��'// �� / o`� 1/ �I ' \ �f WATER ELEVATION=4784.0 / /z '(T n 1ll I` (O1)�//� :J j/f `1 / I// 1 / , / �/ / /// / RESERVE AREA / 1 JJJ 1 I RIVERBANK r , a yI / /,: I 1 . 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ONCRETE • TROUGH J - - f , _,l _r `r 1 Gyy ,,, /,, ) - -', , l GATE ( � \ L� • / /rl ( / / i--/( 1/r /,�/ /,/// 'T J • -� jf / � +, =--,f--- r= �'_ .... 1 - �WII��' // (1 .1.1 /\ �� J �n( POST \I \ \\ �+ 1 „ ,,� f ) �% ! f I / 1 //- <S ) 7 /,� /,� j /,� ( ( rtri / ^ 1 5 / i MW 1 7023 t�., /::It ,:.:, /\� i.-I N \ \ 7 ( of / 1 ,> r,--S J .^ ,-- L \ / �\ t //, /,// ' -, \ .� ,� I / 4794.0 _ - -' t&r.-4.,:er PRIMARY "\ WATER WELL 1 r \\ \1 ( l / ,. \J / \ / / �.y- - - am ENTRANCE sr-'-- ti \ I /ti / / ) / \� �..�.�� I / : . .. .. , °'� . OIL OR GAS WELL L%c1 �\ �\ �� / ( // T _ - / I' (( '" t 1 .1)f/ -n / '/, - --�= = ,� I .Y - POND - \i� { ` I �\ j 1 1 �� l� J/ �[� f i 11\l I '///� ( jQA � / `�_//1 C `^ ��/ / /' /� '/ - - =� / / ��; �w f-•� ABANDONED OIL OR GAS WELL • I 11 1\\� 5 �-�J-� At J ( � j ( / f /G�- / v %// 'O/ /„ // ' , �- . i / I •'r-- :-': • t ! f I 1 I,� l) d! 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( 9 7027 / I I �I I I _ - _-,-ti_- _ `-` ,�\, :.1: , . EXISTING CONTOUR 25867-F-R 40.201879 -104.914413 COLORADO DAIRY FARMS Well Constructed 3/14/1992 General Purpose N. ' _ ` -' - �- p stock / 01 I` (llIll�/� Z •-==� __ =�� \ \\,f114 (II ( 'jj -�-_ INTERVAL: 1 FEET MW-6 I 77 r. = .� _ _-_ `- � 1�5 l I 7� / (e, P'') 1, \ 333157- 40.190133 -104.9053561 RAPTOR MATERIALS,LLC(VARRA,GARRETT) Well Constructed 8/23/2023 Monitoring/Observation Monitoring/Sampling 7021 4798.21 4800.91 / \ / / • `I I I it/��7. ,� r^� _ - ry __ V -`\ ,i� \ (4, \ ( \� �1 mt,�, '�.� ,i i r PROPOSED CONTOUR / I, I�� ^/� -'="*. .r�•�� _ ��-- �,A \ It� I It I ` ��-' /., ``� POND ( ( .: I299543- 40.189339 104.903950 VARRA COMPANIES INC(VARRA,GARRETT) Well Constructed 8/6/2013 Monitoring/Observation Monitoring/Sampling • \ , I 1/((t�(// pZ� / r r1 �‘_ ` .��\\\ ,\1);LI��1� 1� I l� I � 1` \\5 , I ) 1 !) INTERVAL: 1 FEET MATERIALS, LLC. 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Financial W a r r c n t y V a p PAGE: 1 OF 1 MAT eRlaLs«c N American Water Engineering Services, EEC . =-0, 4 January 21, 2026 Joel Renfro Division of Reclamation, Mining and Safety 1313 Sherman St, #215 Denver, CO 80203 RE: Comments on Groundwater Monitoring Plan & Groundwater Model Report 112C Permit Application Adequacy Review—Cogburn Mine DRMS Letter Date January 16, 2026 Attn: Mr. Joel Renfro Dear Mr. Renfro: This letter provides responses to a review of the Groundwater Monitoring Plan (Plan) generated by American Water Engineering Services, LLC (AWES) for the Raptor Materials, LLC (Raptor) mine located near Platteville, Colorado. This letter is intended to address the issues, in part, raised in the Division of Reclamation, Mining and Safety (DRMS) letter dated January 16, 2026. Comments not addressed by AWES are addressed by RESPEC of Denver, Colorado in a separate submittal. The following summarize DRMS comments by item. 1. Comment 4 — In the Applicant's response to the objector, Acord St Vrain, in the third paragraph there is a summary description of the mounding and shadowing effects on groundwater. In the Mining and Water Storage Analysis in the Results section the summary of mounding and shadowing differ, please explain this discrepancy. The areas of concern were at different locations than the model assigned wells. Obviously, groundwater levels will be different and explains the apparent discrepancy. 2. Comment 5 — In Adequacy Review No.1 Responses, item #20 of Mr. Lennberg's memo, the Applicant commits to a quarterly reporting frequency. The specified frequency is missing in the Groundwater Monitoring Plan, although it is stated within the plan that groundwater quality and level measurements will be submitted quarterly. The Groundwater Monitoring Plan has been updated with specific submittal dates. 3. Comment 6 - In the Groundwater Monitoring Plan, Section 2.3, it is stated that wells 1, 2, 3 and 6 will have samples collected for baseline analysis. This section needs to be updated to be consistent with the response given to item #6 of Mr. Lennberg's Adequacy No. 2 memo. Raptor will begin sampling wells MW-1 and MW-6 in Q4 2025 to supplement the four quarters of baseline data already collected at MW-2 and MW-3. Well MW- 5 has been irreparably damaged by farming equipment; once it is re-drilled, it will be sampled for groundwater quality. Well MW-4 is located far enough from the proposed permit area that it will not be considered in the baseline groundwater evaluation. Raptor Materials will contact Response to DRMS Comments January 16, 2026 Response Letter Page 2 the DRMS following receipt of groundwater quality data at MW-1, MW-6, and MW-5 to determine the sufficiency of existing data and to establish a point(s) of compliance prior to groundwater disturbance at the site. The Groundwater Monitoring Plan will be updated with the requested changes mentioned above. If you have any questions or need additional information, please contact me at (970) 590-3807. Sincerely, AWES, LLC c3j--) A91.,._"____-- Joby Adams, P.G., REM Principal/Hydrogeologist AH ES I%1 1 I III Thu I 4 Uri.F4 rt f4 llins.ft %1 4/4-370-59t}-3141D7 AMERICAN WATER ENGINEERING SERVICES, LLC GROUNDWATER MONITORING PLAN RAPTOR PIT 125 WELD COUNTY, COLORADO AWES PROJECT # 2024-RM-P125 JANUARY 2026 L .oo . ,. I ,,,,, 7 __ ,:i". , 1 h i {1 •Y �!T. I .._ ..- - air _ .0,./c. , . .. . _,„, _. ii_-. .,-.H. L. F:...„.4,._ _ ,..,:r4Api;wiini,,,,,...,:,;!-. .,:1-,!i-,....,.,.,_,..:',.-.4.,:.,,.-,,.—._,,.t.ti.i•,--,'k- t ea r cr` --, . r `, 1,4• 4 'Il • 1 Y y # s f ,,A �alft#. '14-'''''... t cr \ S -.--_, .' ,L, 4,-...4 ._._ ' r (14 , i Gyre / alt r� '_ l f ['.: Prepared for: Prepared by: Raptor Materials, LLC. AWES, LLC 8120 Gage Street 4809 Four Star Ct. Frederick, CO 80516 Fort Collins, CO 80524 . AWES 4803 Four Star Court, Fort Collins, CC 80424 AWES, LLC Table of Contents 1.0 INTRODUCTION 1 1.1 Objectives 1 1.2 Background Information 1 2.0 GROUNDWATER MONITORING 1 2.1 Monitoring Well Installation 1 2.2 Groundwater Level Measurements 2 2.3 Chemical Analyses 2 2.4 Drawdown/Mounding Modeling 3 2.5 Contingency Plan and Abatement 3 3.0 ORGANIZATION AND STAFF ASSIGNMENTS 4 3.1 Project Personnel 4 3.2 Subcontractors 4 4.0 OVERVIEW-QUALITY ASSURANCE/QUALITY CONTROL 4 5.0 REMARKS 5 FIGURES Figure 1 -Site Location Map Figure 2—Monitoring Well Location Map Figure 3—Reservoir Details TABLE Table 1- Analytical Parameters APPENDICIES Appendix A—Boring Logs Appendix B—Groundwater Sampling QA/QC Plan and Checklist 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 196.4 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. • To determine the aerial extent of drawdown associated with mine dewatering; • 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 • 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 6th Principal Meridian. The surrounding land use consists of agricultural, rural residential and oil and gas gathering. The proposed mine area occupies an estimated 196.4 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 drilled 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 varied 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_MONITORING 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. i AWES, LLC 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 horizontal 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 dewatering operations—these data will be presented in quarterly reports submitted to the Division. After reclamation groundwater levels will be measured on a quarterly basis until the mine permit has been withdrawn.Appendix B presents the Groundwater Sampling QA/QC Plan. 2.3 Chemical Analyses Table 1 presents field parameters and laboratory analyses for samples obtained from wells selected as compliance or background monitoring wells (MW-1, MW-2, MW-3 and MW-6). Water levels will be measured from all wells on a monthly basis. Five samples will be obtained from compliance and/or background wells on a quarterly basis for the parameters listed below to establish a baseline. These wells will be sampled quarterly thereafter. Raptor will begin sampling wells MW-1 and MW-6 in Q4 2025 to supplement the four quarters of baseline data already collected at MW-2 and MW-3. Well MW-5 has been irreparably damaged by farming equipment; once it is re-drilled, it will be sampled for groundwater quality. Well MW-4 is located far enough from the proposed permit area that it will not be considered in the baseline groundwater evaluation. Raptor Materials will contact the DRMS following receipt of groundwater quality data at MW-1, MW-6,and MW- 5 to determine the sufficiency of existing data and to establish a point(s) of compliance prior to groundwater disturbance at the site. REST OF PAGE INTENTIONALLY LEFT BLANK 2 AWES, LLC Table 1—Analytical Parameters Table Value Standard Reg.41 Table Analyte (mg/L, unless otherunits Reference(1-4) given) _ pH Field (pH unit) 6.50-8.50 2 and 3 TDS 400 mg/L, or 1.25X 4 background Chloride- Dissolved 250 2 Fluoride- Dissolved 2 3 Nitrate (NO3) 10 1 Nitrite (NO2) 1.0 1 Nitrite+ Nitrate as Nitrogen 10 1 Sulfate- Dissolved 250 2 Aluminum- Dissolved 5 3 Antimony- Dissolved 0.006 1 Arsenic- Dissolved 0.01 1 Barium - Dissolved 2 1 Beryllium - Dissolved 0.004 1 Boron- Dissolved 0.75 3 Cadmium - Dissolved 0.005 1 Chromium- Dissolved 0.1 1 and 3 Cobalt- Dissolved 0.05 3 Copper- Dissolved 0.2 3 Iron- Dissolved 0.3 2 Lead- Dissolved 0.05 1 Lithium- Dissolved 2.5 3 Manganese-Dissolved 0.05 2 Mercury- Dissolved 0.002 1 Molybdenum- Dissolved 0.21 1 Nickel - Dissolved 0.1 1 Selenium- Dissolved 0.02 3 Silver- Dissolved 0.05 1 Thallium- Dissolved 0.002 1 Uranium- Dissolved 0.0168 to 0.03 1 Vanadium- Dissolved 0.1 3 Zinc- Dissolved 2 3 Well construction logs will be used to calculate the static water volume of the well and a minimum of three static water volumes (purge volume)will be evacuated prior to sampling. Additionally, once temperature, pH and conductivity have stabilized (usually+/-five percent)then sampling can begin. Raptor will submit groundwater monitoring results on the schedule as provided below. • First quarter report due by May 1st of every year. • Second quarter report is due by August 1st of every year. •Third quarter report due by November 1st of every year. • Fourth quarter report is due February 1st of the following year. 2.4 Drawdown/Mounding Modeling Water level data will be used for drawdown and mounding analyses.The average of water level data over a one year period will be input into the geostatistical software package Surfer®.Variations in pre-mining water levels 3 AWES, LLC 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 dewatering 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 quarterly 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 STAFFASSIGNMENTS 3.1 Project Personnel Mr. Garrett Varra of Raptor will serve as field coordinator and will be responsible for obtaining water levels and will perform or supervise water quality sampling. Mr. Varra of Raptor will also 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. 4.0 OVERVIEW-QUALITY ASSURANCE/QUALITY CONTROL Quality assurance (QA) is a management system for ensuring 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. 4 AWES, LLC 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, primarily individuals with the proper education, training, and experience, 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 laboratories. 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-gathering 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; • 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 prior to implementation. This Groundwater Monitoring Plan was prepared by AWES, LLC. cy,—.) 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K� I '/, / '/, / �.� ; " \.1 y'� /�� / \�/ ,� ' VEHICLE XING#1 / /','/ � „. O �Gf `. / \� r L-T3. , -- ) \ _ - '' _ / l -_'_��, -=�' / ✓/ r/ ,/� � :... '..�•:- 10 FT WIDE OUTFACE PIPE \ r1,. T 11 f!t`-- __.e'er ye - •�'-�-�-- \ / ' 'K � LASTCHANCED/TCH / / 11I -.� ,. ; . 3,140 S.F. / / =-,j �- ' ��/f (1 NORroHroFWAr ,% ry y� • — �� DISTURBANCE / — — a�_;,I / / f DOCUMENrSPROUIDEDOR / I , k...3� : `+° tr�•zt-._:..: •�`': 1 • r /�/ �� / \� ` SETTLING ��, .; /� �/ / DISCO�EREDDUmN�zESEAzcH y �� o° 1 � µ<....o.., ... "' 20FT WIDE UNPAVED ACCESS ROAD 5J / j z � BASIN U /�� I!�` �/ HIsrORicRr�HrsAPLY ! /� y �,�� ,�,. r : : DISTURBANCE 12,820 LF (5.89 ACRES) 1. i •/ r ( � K-. / q `` \ ■ .... \ - PROPOSED / j/ ri // \ // // . ,,,, / • IAA. . I J ( �r \ \ I ACCESS ROAD S / // i /, / I - #1 70 LF ___c `` / P125A ( PROPOSED TRANSFER __ � J ;)�- � - �.. — ~ - \ �� Al �')// �/ ' :/_//,_,3,..„;,.? VEHICLE CROSSINGS DISTURBANCE #2 120 LF t / ( 1 J 1�l sly' / j AREA =23.8 AC. / /, I .4. d) / CONVEYOR 150 LF 1 F I - - J _ j\ `N / , .i / �ccrsl�E ` / / /// I � :_:.: ( #3 20 L \ / / 111.1! / w PROPOSED yl / k ,,, / / / QII. INS I +� !I CONVEYOR DISTURBANCE 357 LF I / \ • / \ / /` "5 / f , . ,�/ / i CONVEYOR / / // / / I ) / �� L! :I / � -\, / C"`. ''/ / ( �/ � �� ' �y / _ ,� 41 I EXISTING UNPAVED ROAD DISTURBANCE 1 .03 ACRES .:' ,, / / _)U I";:f. -ei \ / 1 Z.1 \\ / / \\ \ / / I /i / 1� //tARRENE9 % / ,16PA) � �, \ / /\ \ J // ( : (1 , f � y is / \ ' ;. , I E{ �J Iry I) r V� // dO / � ` ' EMPLOYEE PARKING#2& 1I \ ■% // // ) 0 o // •=: I MATERIALS STORAGE(CONEX) }J1 AO• 1 _ -\VAS /O� 1c/� //,'� ��; _ � TTS #3 t =�� SETTLING )r �- t � 7 ( / 1 ! i. 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'I ■ �� FOLLOWING � �� `� �� c ,., � ./p. , I�� ♦ �: �� ACCESS ROAD /` Z ■ / r / I r /.• 1� EXTRACTION •♦��♦�♦�♦�♦�♦�•��'�•�� v; I J / TIE TO EXIST. v « 333156- �� ' ./ ' / ACCESS ROAD J MW-5 7019 �fr � � ,�9� • <<: II I • ) . . . - - �e� 'M� _ leir_A • 910 COUNTY ROAD2i m . — .■ . — . — . — . — . — . . / — .. ■ 1 \ C + :,2`.i!:. „s u6vt;‘.,Loy ,COUNTYROAD28 ... — — _ x< y — / • ■ • ( f sir - -' - - -- — - - fi- ^: °` - - / 7= ■� • r I II ACCESS POINT#3 = _—__~_ - _- - ~� 1 .A" E aIl \ is A '1111 r/ _ '--------------1---_ _ -- � \ •Z \,,`Sit 1 I y \ y `` PORD I __ / 1 4 II I// lr -'�= - " -, �T — ,— = - \ \ l r 1�-` 1 EXIST. CONTOUR ri \ /� •I \Illllll)III1III�I////(// �� w---� — _ - .` �\\`\12�1\lI!� (Z J -' .�: `� POND I(J( :%. INTERVAL: 1 FEET fi I \ -I, Ill la 1111►1,1�11111II,IdII,I�V"II,I(�l,),e ° / r �_/� = ;: - ��0�\.\\`��,\ .1>..<<(,di` „ I �� t:':; ;„. ti t�� R MATERIALS, LLC. PROJECT: NOTES: SCALE: ;9inGSoO :t RAPTOCoc3urn Sand , Gravel and eservoIr Project D FREDERICK, COLORADO 80534 REVISION: 12 NOVEMBER 2025 RAPTOR TELEPHONE: (303) 666-6657 DRAWING: Exhibit C— 2: Extraction Plan V a p PAGE: 3 OF 3 MATERIALSuc Figure 3 - Reservoir Details o� tl I ,' _ II ip ' LEGEND / C, - -,; I �- /Z - XXXX EXISTING MAJOR CONTOUR I 1 % L . - - I II I �� r EXISTING MINOR CONTOUR • C� s '�'�+-� *� 1 1 1 XXXX PROPOSED MAJOR CONTOUR imilliti � � .y - - ■■ 1,� PROPOSED MINOR CONTOUR et 11� BOUNDARY APPROXIMATE —J r ( \--;�1.� 200 FOOT BOUNDARY OFFSET APPROXIMATE I p/ ..s\/4 _c�o 0 o FENCE 061111 4785 A .�..� ��,. mom_/ --4.' EASEMENT LINE 11 Ire a - CHADBURN WARREN TRUE I (PA) �, 1' `''-' �� DISCHARGE PIPE 8J0 • - - - / / , O j ■� - a - RIGHT-OF-WAY LINE mg/• \ (� '� 4111.111M �j■ �� STREET- EXISTING /• I I CENTERLINE HSR-COGBURN 2-29/1(PR) _X' / • I 333155- - 333293 ,, • 1M {- ■ — ■ — FLOODPLAIN / 333292- �> '. ' FLOOD ZONE A :a.; - / 333294- �r r ✓ / r ,._-_-'-' I I \ 4:4 - -- 'RN 9 ` 3 1 3 ^ . FLOOD ZONE AE .. HSR COGBURN 3 29(P 9/ ,. � HSR COGBU (S/j - �� • ( h ;)/. , 33 5 FLOOD ZONE X 1/ , ` (01 ,, (*) / / _ ` ■ I YJ '. EXTRACTION LIMITS ■ HSR-COGBURN 4-29(PR/ 1 O /// �■ ` ` ■ ) I'A t /' /- P 33329- / / ■` / �b �' / ' /1 INITIAL AREA OF EXTRACTION - r • . • sl.v��NRw�R WARREN POOLING UNIT 1 (SI) /� /// // ' I y/ WATER FILLED AREA ii ■ _ 1 / / / / I BACKFILLED ti ' _ �� // ,��/ /./ I ? // . �� CONVEYOR }- s' HSR COGBURN 6 29(Sl/ �� ./ PIT WATER LEVEL / co \ r ( 4 LAST CHANCE DITCH BOUNDARY .- , � , • gat/ �� - -... RIVERBANK HSR COGBURN 5-29(PAi) O 333296- - ' 4.< ir _ 3's N''. � i � � �+ _. -� (P�) DISTANCE BETWEEN FOUND PINS ■ _ �i( � A, I ^ I/ ✓4800 ® WITNESS CORNER t----, -,,,i ■ /Fig / , 1 �- le FOUND ALIQUOT CORNER AS DESCRIBED A.. ) I I / . /' 7 / / / (Al O CALCULATED POSITION .../ / ) FOUND #5 REBAR WITH 1.25" RED PLASTIC / \ I / r 1 • CAP LS 37971 N08°26'56" E 3.25' FROM - �r`a ��!:�� j, .� J CALCULATED POSITION r 2: ,:, / - ■ �, PRODUCING WELL HEAD I ilt. _,.. �_ _- 7 /'�� _ APPROXIMATE PLUGGED &ABANDONED WELL ■*yr— = . :-, �11 / , /r; HEAD LOCATION v _ —' . ' f - 333152 ,— GATE //Ilit i1 , // ; I W POST / i■t ■ P 0 WATER WELL j6' w■ ////7 ;' ss �•; OIL OR GAS WELL C ` I /;` ABANDONED OIL OR GAS WELL 90 A WARREN 29 9 L(Sl) I (� I:; -� BATHTUB METHOD OF LINER CONSTRUCTION /, Slope no steeper than 3:1 H:V ____=_______ ...___:______ ......„..-_________.........._------- (/// /ii k' aRRCN J9 ICI IPA) DEVELOPED WATER RESOURCES i/ I '`a, - - - - WITH GRASS EMBANKMENTS { • k ./- I 3• - i _ , -- \ _-/- r/e / ..._::.1;I / (i 41/4 i • / �\ ,s , 1 is, 4 co 1- 4124-F <4, , :: , . , ., ;. „1 _ 0 I I ___ ,(z_ f.o \.. ____ / / , , — - , . , •c � //: /„.. ,i, ::::,, z , • ) r-c- .-. e. - - _ . ......., ,, <4, .,•• i . _ . ...... • ...... . 1 \ , .sz- 4? , AV / / -A, -',- 11 / / /1 A Q c/) 41 \ Pr .. .- . / /I/ / / I 1 318477 I / WA//RN z9 16L/P / • praidifr. , - V, / _..i Nrr ,7, -----------------------7/„ 7 ,, ,_. �• -- ''''- -7--/ „, •TO BE BACKFILLED �♦��•�•�� _� 1 I , L / e FOLLOWING ��♦ _ ..:;.:...:: . ♦ EXTRACTION �♦♦� , �♦...♦♦.._ , = I, \). • ' In / . ori • arp/PF-_. / ►�w��i��0�♦ ♦. �i�y�i�i�i��i��i�i�i�i��i�i�i�i�i� ��i�i�i°�i�i�►�i�i� •�. I ■ 1 / I 7299543 ....... • . . -.. 'COUNTY ROAD 28 � -- .. . . 1.N. i k. .im • ■ — — — — _ ' ` 333156 - � \ J ■ / ■ tiles /9. �l1 f Ifni -� — � \ ( I 1 Ate_ illini\rdW {I - .-, I III IS _ �� • - \- , 1 . RAPTOR MATERIALS, LLC. PROJECT: - NOTES: SCALE: 1 inch = 200 feet 8120GAGESTREET Cocpurn Sanc , Grcve anc reservoir Projec DATE: 01 November 2024 FREDERICK, COLORADO 80534 REVISION:CCRAPTOR TELEPHONE: (303) 666-6657 DRAWING: Exhibit e c l a m a t i o n V a p Ian1 OF 1 MA7ERIALSuc PAGE: APPENDIX A SOIL BORING LOGS Project: Raptor Materials, LLC AWES, LLC Log of Boring MW-1 \ Project Location: P-125 4809 Four Star Ct. Fort Collins,CO 80524 Sheet 1 of 1 Project Number: 2023-RM-P125 970-590-3807 O ` Date(s) 8/21/2023 Logged By JLA Checked By Drilled Drilling HSA Drill Bit 4 25 Total Depth 38 feet bgs Method Size/Type of Borehole Drill Rig Diedrich Drilling DrillPro Services Approximate 4797 Type Contractor Surface Elevation Groundwater Level 13.01 Sampling Cuttings Hammer Percussion and Date Measured Method(s) Data Borehole Location Far NE Well `Backfil I i U c U al o 45 N L y c 0 H Z Q, H _1 o o N N C (6 L U '� J > a E E £ 3 ' — REMARKS AND OTHER w 0 all co in 7o 2 CD MATERIAL DESCRIPTION 0 TESTS 4797 0 - OL ;I,I I,- Top soil/overburden,dark brown, moist,some - °i a7 Concrete _ _ _ sand and gravel. e/ // Bentonite chips 4792—- 5— �-'I SW ▪ ti Sand,poorly sorted,very fine to very coarse ._ grained,some gravel,brown,moist to wet at _ -- - �•`13 feet. - 4787— 10— _ — • 1"blank riser E ' Note:2.5'above grade - = _ = riser 4782—- 15— — - - ••,, - - •r 4777—- 20— — - _ GM o▪�r Gravel,sand and silt mixture,red-brown,wet. - o•_ - - a - 7 = c - - •o° - - - ' - 2 ° = c 4772— 25— a a o°— — ° = 1"0.01 slot PVC - - .7(1 - 7 B c well screen •• r 2 = c 4767—- 30— °O°— — .7 = 6 -- - o• au - - °o = ° - - G� _ J 6 4762— 35— oO o— — _ _ Shale r {- Shale,stiff,grey to dark grey.- - - End of Boring - 4757— 40— — — 4752—- 45— — — 4747—- 50— — — N - - - - a - - - - m - - - N 4742—- 55— — — a - - - o 0 - - c' 4737—- 60— — — $ - - m - - - N - - - N_ m 4732—- 65— — — N - - N _ - - O N - - - w 4727— 70 3 6 Project: Raptor Materials, LLC AWES, 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 970-590-3807 — O U c o n O N L y a) Q E o. o) m c H Z m O O .� N O C N L U 'E o > a E E 3 E) o- D - REMARKS AND OTHER w p �) u) u) —�° 2 C9 MATERIAL DESCRIPTION co p TESTS u U IJ u u u u u U IA IA1U2 COLUMN DESCRIPTIONS 1 Elevation(feet): Elevation(MSL,feet). 0 Water Content,%:Water content of the soil sample,expressed as 2 Depth(feet): Depth in feet below the ground surface. percentage of dry weight of sample. 3 Sample Type:Type of soil sample collected at the depth interval 10 Dry Unit Weight, pcf: Dry weight per unit volume of soil sample shown. measured in laboratory,in pounds per cubic foot. ElSample Number:Sample identification number. 11 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 1© REMARKS AND OTHER TESTS:Comments and observations using the hammer identified on the boring log. regarding drilling or sampling made by driller or field personnel. MMaterial 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 PI: Plasticity Index,percent COMP:Compaction test SA:Sieve analysis(percent passing No.200 Sieve) CONS:One-dimensional consolidation test UC: Unconfined compressive strength test,Qu,in ksf LL:Liquid Limit,percent WA:Wash sieve(percent passing No.200 Sieve) MATERIAL GRAPHIC SYMBOLS e//. 'i'ii'i e//. Bentonite chips i'i','i' Low plasticity PEAT(OL) __/_, '1'1'i'1 47•zia Portland Cement Concrete , Shale •�.i``.�.i `ill Silty GRAVEL(GM) Well graded SAND(SW) TYPICAL SAMPLER GRAPHIC SYMBOLS OTHER GRAPHIC SYMBOLS FAuger sampler 1 CME Sampler Pitcher Sample Water level(at time of drilling,ATD) • Water level(after waiting) Bulk Sample Grab Sample 2-inch-OD unlined split Minor change in material properties within a spoon(SPT) stratum f. 3-inch-OD California w/ 2.5-inch-OD Modified , Shelby Tube(Thin-walled, — - Inferred/gradational contact between strata �, Z brass rings California w/brass liners [ fixed head) a ? Queried contact between strata v m N d GENERAL NOTES g 1:Soil classifications are based on the Unified Soil Classification System.Descriptions and stratum lines are interpretive,and actual lithologic changes may be o, gradual.Field descriptions may have been modified to reflect results of lab tests. •0 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. N N a m co N N 0 N V) W 3 U., i Figure B-1 Project: Raptor Materials, LLC AWES, LLC Log of Boring MW-2 \ Project Location: P-125 4809 Four Star Ct. Fort Collins,CO 80524 Sheet 1 of 1 Project Number: 2023-RM-P125 970-590-3807 • e e ` Date(s) 8/22/2023 Logged By JLA Checked By Drilled Drilling HSA Drill Bit 4 25 Total Depth 25 feet bgs Method Size/Type of Borehole Drill Rig Diedrich Drilling DrillPro Services Approximate Type Contractor Surface Elevation Groundwater Level 4, Sampling Cuttings Hammer Percussion and Date Measured Method(s) Data Borehole Location NW of Lagoon `Backfil I i • C U a0 o Q O N L U) C a) tc 11 > O Q O O O O O H Z Q)� H _1 U 0 > J N o - (6 .� > a E E £ 3 L ' REMARKS AND OTHER w a co co in 7o 2 O MATERIAL DESCRIPTION 0 TESTS 0 _ \oL/t 11•.t Top soil/overburden,dark brown, moist,some a ;,: Concrete Sw `sand and gravel. i Bentonite chips 5— Sand,poorly sorted,very fine to very coarse -- grained,some gravel,brown,moist to wet at 4 feet. _ 10— •L — 1"blank riser_ Note-2.5'above grade riser — 15— • ••-- — •.- - C - - .•— 20— Gw — •_ - - •- Gravel,well graded, red-brown,up to 3"gravel, - :�=:� 1"0.01 slot PVC - ��- roet. ��=�• well screen Shal • e•�a,� I_,• — 25- Shale,very stiff,dark grey .!=!. - - - End of Boring - — 30— — — — 35— — — — 40— — — — 45— — — ai — 50— — — N - - - - a - - - - Q N — 55— — — a - - - O _ O c — 60— — — 0 - m - - - - N e7 - - - N — 65— — — 2 N - - - N - - N _ - v) — 70 W 3 U i Project: Raptor Materials, LLC AWES, 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 970-590-3807 — O U c o o. O N _o y a) Q E o. o) m c H Z m O O .� N O C N L U 'E o > a E E 3 E) o- ' - REMARKS AND OTHER w p �) u) u) —�° 2 C9 MATERIAL DESCRIPTION co p TESTS u U IJ u u u u u U IA IA1U2 COLUMN DESCRIPTIONS 1 Elevation(feet): Elevation(MSL,feet). 0 Water Content,%:Water content of the soil sample,expressed as 2 Depth(feet): Depth in feet below the ground surface. percentage of dry weight of sample. 3 Sample Type:Type of soil sample collected at the depth interval 10 Dry Unit Weight, pcf: Dry weight per unit volume of soil sample shown. measured in laboratory,in pounds per cubic foot. ElSample Number:Sample identification number. 11 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 1© REMARKS AND OTHER TESTS:Comments and observations using the hammer identified on the boring log. regarding drilling or sampling made by driller or field personnel. MMaterial 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 PI: Plasticity Index,percent COMP:Compaction test SA:Sieve analysis(percent passing No.200 Sieve) CONS:One-dimensional consolidation test UC: Unconfined compressive strength test,Qu,in ksf LL:Liquid Limit,percent WA:Wash sieve(percent passing No.200 Sieve) MATERIAL GRAPHIC SYMBOLS e//. 'i'ii'i e//. Bentonite chips i'i','I,' Low plasticity PEAT(OL) __/_, '1'1'i'1 67•'la Portland Cement Concrete , Shale tee• ••••4 Well graded GRAVEL(GW) Well graded SAND(SW) TYPICAL SAMPLER GRAPHIC SYMBOLS OTHER GRAPHIC SYMBOLS FAuger sampler 1 CME Sampler Pitcher Sample Water level(at time of drilling,ATD) • Water level(after waiting) Bulk Sample Grab Sample 2-inch-OD unlined split Minor change in material properties within a spoon(SPT) stratum f. 3-inch-OD California w/ 2.5-inch-OD Modified ,C� Shelby Tube(Thin-walled, — - Inferred/gradational contact between strata N Z brass rings California w/brass liners [ fixed head) a ? Queried contact between strata v m N d GENERAL NOTES g 1:Soil classifications are based on the Unified Soil Classification System.Descriptions and stratum lines are interpretive,and actual lithologic changes may be o, gradual.Field descriptions may have been modified to reflect results of lab tests. 0 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. N N a 2 re N N 0 N V) W 3 U., i Figure B-1 Project: Raptor Materials, LLC AWES, LLC Log of Boring MW-3 \ Project Location: P-125 4809 Four Star Ct. Fort Collins,CO 80524 Sheet 1 of 1 Project Number: 2023-RM-P125 970-590-3807 O ` Date(s) 8/22/2023 Logged By JLA Checked By Drilled Drilling HSA Drill Bit 4 25 Total Depth 35 feet bgs Method Size/Type of Borehole Drill Rig Diedrich Drilling DrillPro Services Approximate Type Contractor Surface Elevation Groundwater Level �6, Sampling Cuttings Hammer Percussion and Date Measured Method(s) Data Borehole Location Far West Central Well `Backfil I i U c U al i .d0- ceNc H Z a, H _1 > a) o a> 0 5E m U U 'c sp > a E E £ 3 L ' REMARKS AND OTHER w a co co in 7c 2 U MATERIAL DESCRIPTION 0 TESTS - 0- - \oL 4.i..... t Top soil/overburden,dark brown, moist,some a ;,: Concrete Sw-sM :.ti',_wand and gravel. /_ a •/ Bentonite chips - :1 - Sand,poorly sorted,fine to coarse grained, - 5— :.tiI - - with gravel,wet at 6'bgs. - •.ti — 10 :1 — — 1"blank riser - - .1 - - —- 15— ••1 -- - '•'�. - - •:1 - - — 20— - - - GW W. Gravel,well graded, red-brown,wet,gravel up - :�-•' .•ti to5". _ �ii• i I•i - i 11 I,i — 25— •':..- - •!_�- 1"0.01 slot PVC - r I•a_ - !•_•! well screen -- - ►I - ri 1 r • — 30— . 1- .0-0. - - Shale •t,t, Shale,dark grey,very stiff. - :1='1`; - - - •••-•• _ r1=1 • - 35— . . .I=•• - - - End of boring - —- 40— — — —- 45— — — ai —- 50— — — N - - - - a - - - - m N — 55— — — a - - - o' - - 0 c' —- 60— — — O - - N _ _ _ c. ii 3 U Project: Raptor Materials, LLC AWES, 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 970-590-3807 — O U c o o. O N _o y a) Q E o. o) m c H Z m O O .� N O C N L U 'E o > a E E 3 E) o- ' = REMARKS AND OTHER w p �) u) u) —�° 2 C9 MATERIAL DESCRIPTION co p TESTS u U IJ u u u u u U IA IA1U2 COLUMN DESCRIPTIONS 1 Elevation(feet): Elevation(MSL,feet). 0 Water Content,%:Water content of the soil sample,expressed as 2 Depth(feet): Depth in feet below the ground surface. percentage of dry weight of sample. 3 Sample Type:Type of soil sample collected at the depth interval 10 Dry Unit Weight, pcf: Dry weight per unit volume of soil sample shown. measured in laboratory,in pounds per cubic foot. ElSample Number:Sample identification number. 11 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 1© REMARKS AND OTHER TESTS:Comments and observations using the hammer identified on the boring log. regarding drilling or sampling made by driller or field personnel. MMaterial 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 PI: Plasticity Index,percent COMP:Compaction test SA:Sieve analysis(percent passing No.200 Sieve) CONS:One-dimensional consolidation test UC: Unconfined compressive strength test,Qu,in ksf LL:Liquid Limit,percent WA:Wash sieve(percent passing No.200 Sieve) MATERIAL GRAPHIC SYMBOLS e//. 'i'ii'i e//. Bentonite chips i'i','I,' Low plasticity PEAT(OL) __/_, '1'1'i'1 67•'la Portland Cement Concrete , Shale ••••4 Well graded GRAVEL(GW) • Well graded SAND with Silt(SW-SM) TYPICAL SAMPLER GRAPHIC SYMBOLS OTHER GRAPHIC SYMBOLS FAuger sampler 1 CME Sampler Pitcher Sample Water level(at time of drilling,ATD) • Water level(after waiting) Bulk Sample Grab Sample 2-inch-OD unlined split Minor change in material properties within a spoon(SPT) stratum f. 3-inch-OD California w/ 2.5-inch-OD Modified ,C� Shelby Tube(Thin-walled, — - Inferred/gradational contact between strata N A brass rings California w/brass liners [ fixed head) a ? Queried contact between strata v m N d GENERAL NOTES g 1:Soil classifications are based on the Unified Soil Classification System.Descriptions and stratum lines are interpretive,and actual lithologic changes may be o, gradual.Field descriptions may have been modified to reflect results of lab tests. 0 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. N N a 2 re N N 0 N V) W 3 U., i Figure B-1 Project: Raptor Materials, LLC AWES, LLC Log of Boring MW-4 \ Project Location: P-125 4809 Four Star Ct. Fort Collins,CO 80524 Sheet 1 of 1 Project Number: 2023-RM-P125 970-590-3807 0 ` Date(s) 8/22/2023 Logged By JLA Checked By Drilled Drilling HSA Drill Bit 4 25 Total Depth 25 feet bgs Method Size/Type of Borehole Drill Rig Diedrich Drilling DrillPro Services Approximate Type Contractor Surface Elevation Groundwater Level 8,bgs Sampling Cuttings Hammer Percussion and Date Measured Method(s) Data Borehole Location Far Northwest Well `Backfil I i i • ai c U o N L V c Z Q o > a E E £ 3 L ' REMARKS AND OTHER m w 0 co co in 7o 2 O MATERIAL DESCRIPTION 0 TESTS o _ \oL/t L I..t Top soil/overburden,dark brown, moist,some a ;,: Concrete SW ••••_`sand and gravel. �_ a .,. Bentonite chips 5= •••••` Sand,poorly sorted,fine to coarse grained, with gravel,wet at 6'bgs. - - - V--_ 10— •L — 1"blank riser - :r - • — 15— •./— — •;,` = 1"0.01 slot PVC - - '••' — •IPEI•: well screen - - GW .•- Gravel,well graded,red-brown,wet. — 1•='1•' zo— • •a• •••=40• - - r1•r - i1E1•• _ _ Shale .... Shale,dark grey,very stiff. - 1•C'1•, — 25— . . . - - - End of boring - — 30— — — 35— — — — 40— — — — 45— — — ai — 50— — — N - - - - a - - - - 0, N — 55— — — a - - - 0 - - c' — 60— — — 0 - N - - - N Ii 3 U Project: Raptor Materials, LLC AWES, 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 970-590-3807 — O U c o o. O N _o y a) Q E o. o) m c H Z m O O .� N O C N L U 'E o > a E E 3 E) o- ' - REMARKS AND OTHER w p �) u) u) —�° 2 C9 MATERIAL DESCRIPTION co p TESTS u U IJ u u u u u U IA IA1U2 COLUMN DESCRIPTIONS 1 Elevation(feet): Elevation(MSL,feet). 0 Water Content,%:Water content of the soil sample,expressed as 2 Depth(feet): Depth in feet below the ground surface. percentage of dry weight of sample. 3 Sample Type:Type of soil sample collected at the depth interval 10 Dry Unit Weight, pcf: Dry weight per unit volume of soil sample shown. measured in laboratory,in pounds per cubic foot. ElSample Number:Sample identification number. 11 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 1© REMARKS AND OTHER TESTS:Comments and observations using the hammer identified on the boring log. regarding drilling or sampling made by driller or field personnel. MMaterial 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 PI: Plasticity Index,percent COMP:Compaction test SA:Sieve analysis(percent passing No.200 Sieve) CONS:One-dimensional consolidation test UC: Unconfined compressive strength test,Qu,in ksf LL:Liquid Limit,percent WA:Wash sieve(percent passing No.200 Sieve) MATERIAL GRAPHIC SYMBOLS e//. 'i'ii'i e//. Bentonite chips i'i','I,' Low plasticity PEAT(OL) __/_, '1'1'i'1 67•'la Portland Cement Concrete , Shale tee• ••••4 Well graded GRAVEL(GW) Well graded SAND(SW) TYPICAL SAMPLER GRAPHIC SYMBOLS OTHER GRAPHIC SYMBOLS FAuger sampler 1 CME Sampler Pitcher Sample Water level(at time of drilling,ATD) • Water level(after waiting) Bulk Sample Grab Sample 2-inch-OD unlined split Minor change in material properties within a spoon(SPT) stratum f. 3-inch-OD California w/ 2.5-inch-OD Modified ,C� Shelby Tube(Thin-walled, — - Inferred/gradational contact between strata N Z brass rings California w/brass liners [ fixed head) a ? Queried contact between strata v m N d GENERAL NOTES g 1:Soil classifications are based on the Unified Soil Classification System.Descriptions and stratum lines are interpretive,and actual lithologic changes may be o, gradual.Field descriptions may have been modified to reflect results of lab tests. 0 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. N N a 2 re N N 0 N V) W 3 U., i Figure B-1 Project: Raptor Materials, LLC AWES, LLC Log of Boring MW-5 \ Project Location: P-125 4809 Four Star Ct. Fort Collins,CO 80524 Sheet 1 of 1 Project Number: 2023-RM-P125 970-590-3807 O ` Date(s) 8/23/2023 Logged By JLA Checked By Drilled Drilling HSA Drill Bit 4 25 Total Depth 43 feet bgs Method Size/Type of Borehole Drill Rig Diedrich Drilling DrillPro Services Approximate Type Contractor Surface Elevation 4800 Groundwater Level 13'bgs Sampling Cuttings Hammer Percussion and Date Measured Method(s) Data Borehole Location Far Southwest Well `Backfil I i ai c U al o V) L V o c 0 H Z m o — o a) a) c m ° 0 ,' m > a E E £ 3 s REMARKS AND OTHER 2 co w 0 co co in 7c) 2 O MATERIAL DESCRIPTION 0 TESTS - OL I' - Top soil/overburden,dark brown, moist,some - ;,: Concrete l = sand and gravel. _ e •,. Bentonite chips _ _ — - 5 _ SW Sand,poorly sorted,fine to coarse grained, - with gravel,wet at 6'bgs. —- 10— ....•:.-'— — 1"blank riser - .r - • —- 15— ..— - - - ••k - - .•—- 20— Gw — •_ - - •- Gravel,well graded, red-brown,wet. - :�-.' - - ►I .- - r1=1 • - - i• I.• - i I�=Imo• — 25— •• — — •00• - - ,•L _ r 1=- ►1 I • ••• •dil-•• - - ►I r - rI=I • — 30— •— — •0-• 1"0.01 slot PVC - �0 r - �0_0• - •• well screen - - • - . ,. - - ►1.. • — •1 - rI=I • ••• •0= • •— 35— .r — . ,., - - ►I - - r1=1 • - - •0•_ - •0—_�• - - i S. - i I•=Imo• - - •..- - •00• — 40— a..� — • C,., - _ Shale • ,- Shale,dark grey,very stiff. - r I=I• • • -- - - End of boring— 45— — — 45 — 50— — — N - - a - -- - m N — 55— — — a - - 0 - 0 c' — 60— — — .O - - N - - - N ii 3 U Project: Raptor Materials, LLC AWES, 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 970-590-3807 — O U c o o. O N _o y a) Q E o. o) m c H Z m O O .� N O C N L U 'E o > a E E 3 E) o- ' - REMARKS AND OTHER w p �) u) u) —�° 2 C9 MATERIAL DESCRIPTION co p TESTS u U IJ u u u u u U IA IA1U2 COLUMN DESCRIPTIONS 1 Elevation(feet): Elevation(MSL,feet). 0 Water Content,%:Water content of the soil sample,expressed as 2 Depth(feet): Depth in feet below the ground surface. percentage of dry weight of sample. 3 Sample Type:Type of soil sample collected at the depth interval 10 Dry Unit Weight, pcf: Dry weight per unit volume of soil sample shown. measured in laboratory,in pounds per cubic foot. ElSample Number:Sample identification number. 11 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 1© REMARKS AND OTHER TESTS:Comments and observations using the hammer identified on the boring log. regarding drilling or sampling made by driller or field personnel. MMaterial 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 PI: Plasticity Index,percent COMP:Compaction test SA:Sieve analysis(percent passing No.200 Sieve) CONS:One-dimensional consolidation test UC: Unconfined compressive strength test,Qu,in ksf LL:Liquid Limit,percent WA:Wash sieve(percent passing No.200 Sieve) MATERIAL GRAPHIC SYMBOLS e//. 'i'ii'i e//. Bentonite chips i'i','I,' Low plasticity PEAT(OL) __/_, '1'1'i'1 67•'la Portland Cement Concrete , Shale tee• ••••4 Well graded GRAVEL(GW) Well graded SAND(SW) TYPICAL SAMPLER GRAPHIC SYMBOLS OTHER GRAPHIC SYMBOLS FAuger sampler 1 CME Sampler Pitcher Sample Water level(at time of drilling,ATD) • Water level(after waiting) Bulk Sample Grab Sample 2-inch-OD unlined split Minor change in material properties within a spoon(SPT) stratum f. 3-inch-OD California w/ 2.5-inch-OD Modified ,C� Shelby Tube(Thin-walled, — - Inferred/gradational contact between strata N Z brass rings California w/brass liners [ fixed head) a ? Queried contact between strata v m N d GENERAL NOTES g 1:Soil classifications are based on the Unified Soil Classification System.Descriptions and stratum lines are interpretive,and actual lithologic changes may be o, gradual.Field descriptions may have been modified to reflect results of lab tests. 0 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. N N a 2 re N N 0 N V) W 3 U., i Figure B-1 Project: Raptor Materials, LLC AWES, LLC Log of Boring MW-6 \ Project Location: P-125 4809 Four Star Ct. Fort Collins,CO 80524 Sheet 1 of 1 Project Number: 2023-RM-P125 970-590-3807 0 ` Date(s) 8/23/2023 Logged By JLA Checked By Drilled Drilling HSA Drill Bit 4 25 Total Depth 53 feet bgs Method Size/Type of Borehole Drill Rig Diedrich Drilling DrillPro Services Approximate 4800 Type Contractor Surface Elevation Groundwater Level 16'bgs Sampling Cuttings Hammer Percussion and Date Measured Method(s) Data Borehole Location Far Southeast Well `Backfil I i U c U 0 0 V) L V o c 0 H Z m o — o a> a) c . m ° 0 ,' m > a E E £ 3 s ?' REMARKS AND OTHER w 0 co co in 7o 2 O MATERIAL DESCRIPTION 0 TESTS - oL - Top soil/overburden,dark brown, moist,some - ;,: Concrete _ ,'.,'.,'._ sand and gravel. _ i Bentonite chips SW —Sand,poorly sorted,fine to coarse grained, — with gravel,wet at 6'bgs. 10— •L — = 1"blank riser - - .r - — 15- - - _ _ - - .r— 20— SW — ._ - - Gravel,well graded,gravel sand mixture, - :demo' .•r red-brown,wet. _ .•=_•'. - - iI•i - iI=I g — 25— •• — — •0=0• - - ►I�ti - r 1=1.• ••• •0= ' - - ►I r - rICI • — 30— •:•� — •0-• 1"0.01 slot PVC - �0 r - .0=0• - . well screen - rI ti _ rICI • ••• • = � • a.� — 35— ►Ir — r 1=1 • - - •0.._ •0=�• - S. - ►I r - r I=I g - - •..- - •00• - 40 a.i I�ti r 1=1.• - r I•r - i- I=I g - - •.•,_ •00• — 45— r 1gofi— — r 1=1.• - - •0.- - •0=�• Ni - 50— •...- i 1=1. • - _ Shale '_ Shale,dark grey,very stiff. - •�=• - - - End of boring - N — 55— — — a - - - 0 - 0 c' — 60— — — .0 - - N - - -N ii 3 6 Project: Raptor Materials, LLC AWES, 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 970-590-3807 — O U c o o. O N _o y a) Q E o. o) m c H Z m O O .� N O C N L U 'E o > a E E 3 E) o- ' - REMARKS AND OTHER w p �) u) u) —�° 2 C9 MATERIAL DESCRIPTION co p TESTS u U IJ u u u u u U IA IA1U2 COLUMN DESCRIPTIONS 1 Elevation(feet): Elevation(MSL,feet). 0 Water Content,%:Water content of the soil sample,expressed as 2 Depth(feet): Depth in feet below the ground surface. percentage of dry weight of sample. 3 Sample Type:Type of soil sample collected at the depth interval 10 Dry Unit Weight, pcf: Dry weight per unit volume of soil sample shown. measured in laboratory,in pounds per cubic foot. ElSample Number:Sample identification number. 11 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 1© REMARKS AND OTHER TESTS:Comments and observations using the hammer identified on the boring log. regarding drilling or sampling made by driller or field personnel. MMaterial 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 PI: Plasticity Index,percent COMP:Compaction test SA:Sieve analysis(percent passing No.200 Sieve) CONS:One-dimensional consolidation test UC: Unconfined compressive strength test,Qu,in ksf LL:Liquid Limit,percent WA:Wash sieve(percent passing No.200 Sieve) MATERIAL GRAPHIC SYMBOLS e//. 'i'ii'i e//. Bentonite chips i'i','I,' Low plasticity PEAT(OL) __/_, '1'1'i'1 67•'la Portland Cement Concrete , Shale tee• ••••4 Well graded GRAVEL(GW) Well graded SAND(SW) TYPICAL SAMPLER GRAPHIC SYMBOLS OTHER GRAPHIC SYMBOLS FAuger sampler 1 CME Sampler Pitcher Sample Water level(at time of drilling,ATD) • Water level(after waiting) Bulk Sample Grab Sample 2-inch-OD unlined split Minor change in material properties within a spoon(SPT) stratum f. 3-inch-OD California w/ 2.5-inch-OD Modified ,C� Shelby Tube(Thin-walled, — - Inferred/gradational contact between strata N Z brass rings California w/brass liners [ fixed head) a ? Queried contact between strata v m N d GENERAL NOTES g 1:Soil classifications are based on the Unified Soil Classification System.Descriptions and stratum lines are interpretive,and actual lithologic changes may be o, gradual.Field descriptions may have been modified to reflect results of lab tests. 0 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. N N a 2 re N N 0 N V) W 3 U., i Figure B-1 APPENDIX B GROUNDWATER SAMPLING QA/QC PLAN Groundwater Sampling QA/QC Plan 1. Purpose and Scope This QA/QC Plan establishes procedures to ensure groundwater samples collected from the Raptor Pit 125 meet data quality objectives (DQOs) required for regulatory compliance with the Division of Reclamation and Mine Safety (DRMS). The plan applies to all field sampling and laboratory analyses conducted at monitoring wells MW-1 through MW-6. 2. Project Organization Role Name/Organization Project Manager: Bob Haun, Raptor Materials, LLC Field Team Leader: Garrett Varra, Raptor Materials, LLC Laboratory QA/QC: Technology Laboratory,Valerie Meiers 3. Sampling Procedures • Well Purging: Use low-flow pumps or bailers to purge a minimum of 3 well volumes to stabilize pH, temperature, conductivity, and turbidity (when feasible). Field parameters will be collected once prior to purging and then after every well volume purged until three well volumes have been purged or field parameters have stabilized. • Sample Collection: o Use dedicated tubing or decontaminated equipment. o Collect VOC samples (if needed) first to minimize disturbance. o Fill appropriate containers, leaving no headspace for VOCs. • Decontamination: Rinse reusable equipment with Alconox solution, distilled water, and isopropyl alcohol between wells. 4. Field QA/QC Samples Sample Type Frequency Field Duplicate 1 per sample event Equipment Rinsate Blank 1 per event(if needed) Trip Blank(for VOCs) 1 per cooler with VOCs Field Blank 1 per 20 samples or daily 5. Sample Handling and Chain of Custody • Label all samples with unique IDs, date,time, and sampler initials. • Store samples on ice immediately after collection. • Ship to Technology Laboratory within holding times per EPA SW-846 methods. • Complete and maintain chain-of-custody forms from field to lab. 6. Laboratory Analysis Parameter Group Analytical Method Holding Time VOCs EPA 8260B 14 days Metals(total) EPA 200.7 6 months Nitrate/Nitrite EPA 300.0 48 hours The laboratory will meet a minimum reporting limit(MRL) below applicable groundwater standards. 7. Data Quality Objectives(DQOs) Metric Target Precision (Duplicates) RPD<_ 20% Metric Target Accuracy(Spikes) Recovery 80-1, 20% Completeness >90%valid data Blanks < method detection 8. Reporting Results will be summarized in quarterly monitoring reports, including QA/QC summaries, laboratory data packages, and discussion of any deviations from this plan. Completed field data sheets summarizing collected field parameters will be provided in the report. Attachments • Monitoring Well Map • Field Sampling Log Template • Chain of Custody Form Prepared by: [Your Name] Date: [MM/DD/YYYY] Reviewed by: [Reviewer Name] Approved by: [Approver Name] Metals Water Sampling Field Checklist (EPA-Compliant) Preparation ❑ Acid-washed,trace-metal clean bottles (HDPE/Teflon, pre-labeled) ❑ Powder-free nitrile gloves (change between samples) ❑ Field notebook or chain-of-custody forms ❑ Preservatives: Trace-metal grade HNO3 (if lab doesn't pre-preserve) ❑ Cooler with ice packs (keep<_6°C) ❑ Deionized water(for blanks & rinsing) ❑ 0.45 µm filters (for dissolved metals) + clean filter assemblies ❑ Trip blank& equipment blank containers (for QA/QC) At Sampling Site ❑ Well Sampling: Purge>_3 well volumes or until field parameters stabilize ❑ Use low-flow method if possible (<_500 mL/min) ❑ Surface Water: Collect below surface (-15-30 cm),facing upstream ❑ Use only non-metallic (Teflon, HDPE) or stainless 316 parts ❑ Rinse all tubing/pumps with site water before sampling Sample Collection ❑ Change gloves before handling sample bottles ❑ Collect total metals sample first (unfiltered) ❑ For dissolved metals: Filter in field through 0.45 µm filter ❑ Do NOT rinse bottles unless instructed ❑ Fill bottles leaving minimal headspace Preservation ❑ Acidify to pH <2 with HNO3 (unless lab pre-acidifies) ❑ Cap tightly and invert gently to mix ❑ Place samples in cooler immediately (<_6°C) QA/QC Samples ❑ Field blank(deionized water exposed to field conditions) ❑ Equipment blank(post-cleaning check) ❑ Duplicate sample (every 10-20 samples) ❑ Trip blank(esp.for Hg if applicable) Holding Times Parameter Preservation Holding Time Total metals HNO3 to pH <2 6 months Dissolved metals Filter+ HNO3 to pH <2 6 months Mercury HNO3+ preservation 28 days unpreserved, 6 months preserved Documentation ❑ Record: Date,time, GPS location ❑ Sampler name(s), Sample ID ❑ Field parameters (pH, DO, conductivity,temp) ❑ Weather conditions ❑ Complete chain-of-custody form Table E-1:Mining-Regrading Schedule Years 1-5 6-10 Year 1 Year 2 Year 3 Year 4 Year 5 Year 6 Year 7 Total EXTRACTION Pit Total Reserves(tons) Sand and Gravel Mined(tons±) Sand and Gravel Mined(tons±) P125_51 687,416 687,416 500,000 187,416 687,416 P125A 1,463,228 1,463,228 612,584 800,000 50,645 1,463,228 P125B 1,453,304 1,453,304 749,355 703,949 1,453,304 Total: 3,603,949 3,603,949 500,000 800,000 800,000 800,000 703,949 0 0 3,603,949 Pit Length(ft) Pit Wall Created(ft±) Pit Wall Created(ft±) P125_51 3,020 3,020 2,400 620 3,020 P125A 5,166 5,166 2,600 2,566 5,166 P125B 5,940 5,940 0 2,800 3,140 5,940 Total: 14,126 14,126 0 2,400 3,220 2,566 2,800 3,140 0 0 14,126 RECLAMATION Pit Length(ft) Pit Wall Regraded(ft±) Pit Wall Regraded(ft±) P125_51* 0 0 P125A 5,166 5,166 0 1,500 1,500 2,166 5,166 P125B 5,940 1,000 4,940 1,000 3,000 1,940 5,940 Total: 11,106 6,166 4,940 0 0 1,500 1,500 3,166 3,000 1,940 11,106 Pit Length(ft) Pit Wall Remaining(ft±) Pit Wall Remaining(ft±) P125_S1 3,020 0 P125A 5,166 0 0 0 2,600 3,666 2,166 0 0 0 0 P125B 5,940 4,940 0 0 0 0 2,800 4,940 1,940 0 0 Total: 14,126 4,940 0 0 2,600 3,666 4,966 4,940 1,940 0 0 Fill Volume Volume(CY) Volume of backfill or regrade fill(cy±) P125_51 549,690 0 156,403 147,081 125,000 121,205 549,690 P125A 67,724 0 0 19,664 19,664 28,395 0 0 67,724 P125B 50,503 0 0 0 0 8,502 25,506 16,494 50,503 Total: 667,917 0 0 0 156,403 166,746 144,664 158,103 25,506 16,494 667,917 AREA DISTURBANCE. Pit Area(ac) Pit Wall Regraded(ft±) Area Disturbed(ac±) P125_51 10.2 0 10.2 0.0 0.0 0.0 0.0 0.0 0.0 10.2 P125A 23.5 24 0 10.2 13.3 23.5 P125B 30.8 6.7 13.3 10.8 30.8 Other 1.5 2 0 1.5 1.5 Total: 66.0 25 0 11.7 10.2 19.9 13.3 10.8 0.0 0.0 66.0 Pit Area(ac) Pit Wall Remaining(ft±) Area Reclaimed(ac±) P125_51 10.2 0 2.0 8.2 10.2 P125A 23.5 8 24 6.0 8.0 9.5 23.5 P125B 30.8 12.0 18.8 30.8 Other 1.5 0 2 1.5 1.5 Total: 66.0 8 25 0.0 0.0 0.0 8.0 16.2 21.5 20.3 66.0 Area Remaining(ac) 11.7 22.0 41.9 47.2 41.8 20.3 0.0 *Pit P125_S1 will be backfilled as soon after extraction as practically possible. +Area disturbance that requires reclamation.Excludes existing roads or roads that will be left as improvements.Some reclamation will be lined reservoir walls and pit floors below water level,i.e.not revegetated. RAPTOR December 19, 2025 M AT ERIA LS LLc Weld County Clerk to the Board 1150 O Street Greeley, CO 80631 Subject: Cogburn Sand,Gravel,and Reservoir Project,File No. M-2025-016, 112 Construction Materials Reclamation Permit Application, Second Adequacy Response The original 112c permit application for the Cogburn Sand, Gravel and Reservoir Project,(Cogburn), File No. M-2025-016 was submitted to the Division of Mining, Reclamation, and Safety (Division)on March 13,2025;the application was called complete on March 28, 2025. The Division subsequently issued a Preliminary Adequacy Review letter on July 2, 2025; a response was submitted to the Division on September 12, 2025. The Division subsequently issues a Second Adequacy Review letter, including two technical memos that address groundwater and geotechnical stability, on November 25, 2025. The enclosed submittal, which addresses all items from the second adequacy letter and two technical memos, does not contain all elements of the complete permit application; only updated narratives, maps, addenda, and new material are included. A complete list of exhibits and addenda in this submittal is presented in Table 1 below. Table 1.List of complete permit application elements for M-2025-016 Second Adequacy Response Exhibit/Letter Addendum/Enclosure Status from September 2025 Application Application Form Raptor/Garrett Varra Affidavit New Map Exhibit C-1 N/A Updated Map Exhibit C-2 N/A Updated Exhibit D N/A Updated Exhibit E N/A Updated Exhibit E Exhibit E2—Backfill Notice Updated Map Exhibit F N/A Updated Exhibit G Piezometer Measurements Updated Exhibit G/P. Lennberg Review Comments Responses 1 — 11 New Memo Adeq. No. 2 (RESPEC) Exhibit G/P. Lennberg Review Comments Responses 12— 14 New Memo Adeq. No. 2 (AWES) Exhibit G/P. Lennberg Potentiometric Maps Q3 2024—Q3 2025 Updated Memo Adeq.No. 2 Exhibit G/P. Lennberg GW Quality Data and Field Parameters New Memo Adeq. No. 2 Summary Tables Exhibit G/P. Lennberg 2025 Q3 Lab Results and Field Sheet New Memo Adeq. No. 2 Exhibit G/P. Lennberg Groundwater Monitoring Plan(AWES) Updated Memo Adeq.No. 2 Exhibit G/P. Lennberg Mining and Water Storage Analysis Updated Memo Adeq.No. 2 (AWES) Exhibit H N/A Updated Exhbit H CPW No Further Comments New Exhibit L N/A Updated Exhibit M N/A Updated Exhibit M CDPS General Permit COG500000- New Discharge Exhibit S N/A Updated Exhibit S Select Structure Notifications New Exhibit S/B. Hammar Review Comments Responses(AWES) New Memo Adeq.No. 2 Acord St Vrain Objection Response Letters(RESPEC, New Objection AWES, and ERO, December 2025) Acord St Vrain Mine Dewatering Memo(AWES, New Objection November 2025) Preliminary Adequacy Weld County Clerk and Recorder Proof of Amended Submittal Package Receipt Your signature below acknowledges receipt of the above-mentioned materials, as attached. The materials should be added to the above-referenced application, as originally submitted to the Weld County Clerk to the Board, and made accessible for public review. RECEIVED Received on: DEC 19 2025 , 2025 By: WELD COUNTY COMMISSIONERS Office of the Weld County Clerk to the Board of County Commissioners Hello