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Home My WebLink About20253542 �Pageyof Document Included in Paper File Remainder Retained R A P TO Electronically December 19, 2025 MATE R I A L S uc 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 I)(A.bl -Ne1)1Ru> �c, I?L. ( DE-► MN It\i1A11)&)1).i—M 11) I Z Z O LZ 5 171,0 CC )4 C.K J 1)1) )-KN/ 53) I Z 11c1 I Z 5 2025-3542 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 December 19, 2025 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. 2 Dear Joel: The Division of Reclamation, Mining and Safety(Division/DRMS), Office of Mined Land Reclamation(OMLR)reviewed the contents of the Preliminary Adequacy response submitted on September 12, 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 September 26, 2025. The decision date has since been extended three times; the current decision date is January 23, 2025. 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 and Ben Hammar), and. 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.2 (Review) of November 25, 2025, and incorporated technical memoranda and agency comments, necessitating a reply according to its respective item numbers from the Review, iterated in a graphical box, with our comments in blue following. Application Form 1. In the adequacy review response, it is mentioned that an Affidavit is attached authorizing Garrett Varra to act on behalf of Raptor Materials, LLC. This Affidavit appears to be missing from the adequacy response. Please attach this Affidavit to the adequacy#2 response. Affidavit attached. Rule 6.4.3 EXHIBIT C -Pre-mining and Mining Plan Map(s) of Affected Lands 2. Section G states that, "All reasonably identifiable man-made structures on the affected land and within 200 feet of the affected land boundary are located and provided in a table on Exhibit C-1". The term"reasonably identifiable" leaves room for uncertainty that all permanent man-made structures within 200 feet of the boundary have been identified. Please affirm that all structures have been identified per Rule 6.4.3(g). All structures have been identified per Rule 6.4.3(g). Exhibit C-2—Extraction Plan Map: 3. Please clarify what the 20 ft access roads labeled as "tie to exist access road"mean. The 20-ft wide access roads (labeled as such in Map Exhibit C-2) represent the proposed approximate locations of access roads for on-site vehicles and heavy machinery around the edge of the extraction pits. The layout of these roads is dynamic and will move around the edge of the pits as extraction advances. The new access roads will tie in to the existing on-site dirt roads where the existing roads intercept the edge of the proposed excavations. Rule 6.4.4 Exhibit D—Mining Plan 4. In the preliminary adequacy review letter, the Division asked for a commitment to keeping on-site no less than 1.3 times the total amount of topsoil and overburden needed for reclamation. The response committed to keeping at least 1.3 times the needed amount of topsoil only. Please acknowledge and commit to keeping 1.3 times overburden needed in reclamation as well. The material balance based on geologic evaluation as stated clearly in Exhibit D (p3, 3rd paragraph) is not adequate to fulfil the backfill/regrading requirements. 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 permit. This was referenced by footnote as in response to Item 33 and 37, but it would have been appropriate also to consider its applicability to Item 30 concerning the 1.3 times request. The reclamation plan and financial warranty cost estimation for backfill and regrading acknowledges this in Exhibits E and L. 5. It appears that the conveyor connection from M-2025-016 to the main conveyor belt off-site is not within the proposed affected lands boundary. From the response, it sounds like this off-site connection is incorporated into the M1999-006 permit boundary. Please be advised that the M1999-006 permit will need to be revised to include this new conveyor that will be constructed. Acknowledged. The M-1999-006 permit boundary abuts the M-2020-016 permit boundary along the WCR17 alignment. The portion of the conveyor crossing that is within the M-1999-006 permit boundary will be incorporated into that permit through an appropriate revision. 6. Additionally,please acknowledge that any new structures constructed in another permit area to support this operation will need to be incorporated into that permit through the appropriate revision. Acknowledged and statement added to Exhibit D. 7. The proposed discharge pipe from P125A to an existing ditch on the west side of WCR 17 appears to go outside of the eastern permit boundary. Please be advised that all infrastructure constructed/installed for the operation needs to be within the proposed affected land boundary. Please update the location of this pipe to be within the affected land boundary. The discharge pipe from P125A and the receiving ditch are located within the permit boundary. 8. Please note that although an optional seed mixture presented in Exhibit L may not be used, the Division will need to account for the potential of this mix being used, and this will significantly increase revegetation costs in the bond. If you wish to just be bonded for the primary seed mixture,please clarify that the optional seed mixture will only be used after a Technical Revision is submitted and approved by the Division, so reclamation costs can be updated to reflect this change in the plan. The optional seed mixture will be used only after a Technical Revision is submitted and approved by the DRMS. A statement to this effect has been added to Exhibit D. 9. Please define and give examples of what a minor change would be. A"minor change"is vague, and generally, any changes that impact the affected surface acreage,no matter how small,would require a revision to update the plans and bonding. Following discussion with DRMS, Raptor agrees the vague language is confusing and has removed it from the various locations in the Exhibits. 10. It is stated that the maximum length of the extraction front will likely never exceed 2,000 feet. In Exhibit L, the applicant uses 5,000 LF of final pit wall open and pending backfilling/regrading and lining for the Financial Warranty calculation as a worst-case scenario. The mining front length(2,000 feet) conflicts with the exposed wall worst-case length(5,000 LF)used for bonding. Please clarify which figure is the maximum unbackfilled highwall length at any one time. This is a slight misunderstanding of terminology. In this case, the "Extraction Front" or mining front as DRMS has referred to it represents the advancing pit wall which is an active working face or active area of mining. This is not the same as exposed final wall(perimeter wall or slope) awaiting liner installation, final grading, topsoil replacement and revegetation. As stated in Exhibit D (p3, 4th paragraph), concurrent backfilling and grading of perimeter is impacted by various factors but particularly maintaining drainage to dewater the pit. Other factors include access to the extraction areas, conveyor alignments through the extracted areas, and variability in geology and associated suitability to current market demand. The estimated length of exposed wall used in Exhibit L represents a forecast of a worst-case scenario for exposed wall that has not been lined and graded to support a financial warranty estimate. This would include active mining front(s) and other segments of the extraction perimeter that are pending liner installation and regrading. 11. The Division acknowledges that Raptor commits to obtaining the required well permit(s) and Substitute Water Supply Plan(SWSP) from the Division of Water Resources. However, it must be specified that these well permits and SWSP are provided to the Division prior to exposing any groundwater at the site. Please commit to providing copies of these to the Division prior to exposing any groundwater. Copies of the DWR-approved SWSP and Cogburn well permit will be provided to the DRMS prior to exposing groundwater at the site. A statement to this effect has been added to Exhibit M. 12. The current plan shows a total of 64.8 acres of extraction disturbance. However, disturbed acreage also includes lands that will be developed, stockpile areas,roads, etc. Please clearly state what the maximum proposed disturbed acreage is and update it in the Mining Plan. Additional areas of proposed new disturbance that will require reclamation include employee parking/materials storage areas, sediment basins, outfall pipe corridors, and conveyor corridors external to the extraction areas, all totaling 1.5 acres, for a maximum proposed disturbed area of 66.3 acres. The breakdown of the disturbed area into use is detailed in Exhibit D. 13. Section J states that small ditches/culverts will be constructed as needed, and drainage is confined by earthen berms/internal drainage. Rule 6.4.4(j)requires sufficient information to evaluate structure sizing. Please provide sizing details for these proposed structures or commit to providing this information in a Technical Revision once this information is known. Drainage patterns for the proposed condition are not known at this time due to 1) field fit of excavations due to an inexact knowledge of subsurface deposits and 2)the extremely flat existing surface of the site, which may result in small depressions or areas of ponding that may become apparent when construction begins. If drainage structures are required to mitigate surface water ponding, a Technical Revision will be submitted prior to their installation. A statement to this effect has been added to Exhibit D. Rule 6.4.5 Exhibit E—Reclamation Plan Exhibit E—Backfill Notice: 14. The Backfill Notice mentions that fill material will be sourced from adjacent Raptor permits, primarily P115-Kurtz (M1999-006) and, if excess fill exists after final regrading, P122-Bearson(M2015-003). The permit held for M2015-003 is not called Bearson, according to the Division,but rather the New Cache Agricultural Pond 1. Additionally,this permit is permitted by The New Cache La Poudre Irrigation Company, and not Raptor Materials. Since M2015-003 is not a Raptor permit,please update the language in the backfill notice accordingly. The Bearson permit number submitted had a typo; the correct permit number for the Bearson site is M2015-033. This number has been corrected in Exhibit E—Backfill Notice. 15. If material will be used for backfill from the M2015-003 permit,please provide an Affidavit from the operator of that site acknowledging that they agree to their material being used in the Cogburn reclamation. The Bearson permit number submitted had a typo; the correct permit number for the Bearson site is M2015-033. This number has been corrected in Exhibit E—Backfill Notice. 16. When imported material will be needed,please commit to submitting a Technical Revision prior to importing the material to provide the additional required details, such as the commencement/end date, the approximate volume, and the source of material. Acknowledged. A statement to this effect has been added to Exhibit E—Backfill Notice. Exhibit E—Reclamation Plan: 17. Again, the M2015-003 Bearson site is mentioned in the 1st paragraph of page 1. Please update the name of this site and the language associated with it accordingly with your response to previous items pertaining to this permit. The Bearson permit number submitted had a typo; the correct permit number for the Bearson site is M2015-033. This number has been corrected in Exhibit E. 18. Please commit to ripping all disturbed areas to be retopsoiled around P125A/B due to anticipated compaction, and include the full cost in Exhibit L. Exhibit E has been updated to reflect Raptor's commitment to ripping all areas that will be revegetated. The current Financial Warranty estimate accounts for ripping of all areas to be revegetated, and was therefore not required to be updated. 19. It is stated that monitoring wells will be abandoned following the required post- reclamation monitoring period in accordance with DWR's rules. The plan for abandonment needs to be explained. Please provide a reclamation plan for these wells. A reclamation plan consistent with DWR's Rules and Regulations for Well Construction has been added to Exhibit E. 20. Exhibit L details disposing of the conveyor belt concrete footings on-site. This plan is not detailed in the reclamation plan. Please explain how the concrete footings will be disposed of on-site. Exhibit E has been modified to reflect disposal of concrete conveyor footings as inert fill material on-site. 21. Please state that the conveyor belt will be decommissioned and disposed of off-site in this exhibit as well. Nothing in the permit application was intended to convey an intent to dispose of conveyor belt onsite. Exhibit E will be modified to state explicitly that conveyor belt will be disposed of off-site unless the owner advises rather than disposal,they desire to reuse the conveyor belt for some post mining purpose(s). The subject was not addressed as there is no obvious section in which such a discussion would belong. Raptor has elected to amend Exhibit E to address decommissioning of infrastructure in Section 2.E as a stage or phase of reclamation. 22. Figure 1 shows a cross-section of the clay liner construction. The construction of this clay liner appears to be atypical to what the Division usually sees. This diagram shows that construction will leave a 3H:1 V slope just at the bottom portion after 23' depth and leave the top 23'with a 1.25H:1V slope. The Division typically sees slopes graded to 3H:1 V for the top portion or the entire length for proposed reservoirs. Furthermore,this plan conflicts with the requirements in Rule 3.1.5(7),which state, "In all cases where a lake or pond is produced as a portion of the Reclamation Plan, all slopes, unless otherwise approved by the Board or Office, shall be no steeper than a ratio of 2:1 (horizontal to vertical ratio),except from 5 feet above to 10 feet below the expected water line where slopes shall be not steeper than 3:1". Please revise the proposed liner construction plan to ensure the final configuration of the reservoir slopes is in compliance with Rule 3.1.5(7). To clarify what is shown and described in Figure 1 and described in adjacent text, Figure 1 shows four elements, all clearly labeled: a) Bedrock, generally undisturbed other than the keyway used initially for drainage and later to key the liner into the bedrock b) Unexcavated Perimeter Wall, which is also undisturbed material from surface to bedrock potentially composed of topsoil, overburden, sand and gravel, and possibly other material (e.g. clay or other rock lenses). The final wall excavation profile developed from the geotechnical stability evaluation is that from surface to 23 feet below ground surface (bgs) the excavated slope can be up to a maximum slope grade of 1.25H:1V. From 23 feet bgs to bedrock, a flatter slope grade of 3H:1 V was required to ensure stability and adequate Factors of Safety. c) Liner, the layer intended to provide a low permeability separation between the surrounding alluvial groundwater in the perimeter wall and the intended developed water storage structures. The construction of the liner takes place on the excavation wall and is described in Exhibit E (Section 2.C, Rule 3.1.5). Some of the liner will conform to the upper 1.25H:1V slope and some will conform to the lower 3H:1V slope. d) Backfill is overburden,borrow material, or other inert material available on site or imported establishing a minimum 3H:1 V slope from the ground surface at the edge of the excavation to the base on the excavation on bedrock. The slope configuration was reviewed in response to the separate comment letter from Ben Hammar and confirmed as stable (see Item 36). 23. For clay liner construction, the Division needs to receive as-builts for each completed liner installation within 60 days of completion. Please commit to providing the as-builts. The request for liner as-builts was discussed in an adequacy meeting with the DRMS on December 9, 2025, following which DRMS reviewed this item internally and concluded that liner as-builts will not be required for the proposed clay liners at the Cogburn site. Rule 6.4.6 Exhibit F—Reclamation Plan Map 24. The table on the map shows the "Total revegetated area disturbance AC" as 1.4 acres. It's unclear to the Division how this number was achieved, considering the entire 10.2 acres of P-125-S 1 and parts of the other pits will need to be reseeded per the rangeland revegetation plan. The area to be revegetated includes the parking/materials storage areas, settling basins, the reservoir embankments above the static water level, and the entirety of pit P125_S1, totaling 24.3 acres. This number is detailed in the financial warranty estimate in Exhibit L, and Map Exhibit F has been updated with this area. Rule 6.4.7 Exhibit G—Water Information 25. Please see the Technical Review letter from Patrick Lennberg, DRMS, sent on November 10, 2025, and address the items detailed in that letter. A response to the Groundwater Technical Review letter from Patrick Lennberg is attached to this comments response letter in two parts: comments 1 — 11 are addressed in a memo by RESPEC, and comments 12— 14 are addressed in a memo by AWES. Rule 6.4.8 Exhibit H—Wildlife Information 26. Please be advised that if an additional wildlife survey determines modifications are required to mining operational practices, the mining and reclamation plans and/or maps may need to be updated, regardless of changes to the financial warranty. Acknowledged. A statement to this effect has been added to Exhibit H. 27. The Division has forwarded this revised Exhibit to Colorado Parks and Wildlife (CPW) and is currently awaiting any further comments from the agency. If CPW has any additional comments, the Division will forward them to the applicant as soon as possible. An email from CPW dated December 16, 2025 states that the agency has reviewed the updated information provided in Exhibit H as part of the Preliminary Adequacy and has no further comments. This email is included as an attachment. Rule 6.4.12 Exhibit L—Reclamation Costs 28. Concrete blocks for the conveyor footings are shown to be disposed of on-site in the cost estimate. While concrete material can be used in inert fill, this plan is not stated in the reclamation plan. Please update the reclamation plan accordingly to account for the concrete footing disposal. Exhibit E has been modified to reflect disposal of concrete conveyor footings as inert fill material on-site. 29. The Division needs to see the pit lining and slope backfill bond tasks split into separate line items. It's understood that there's a concern that the maximum 5,000 ft of unbackfilled pit walls could vary between the top two pits. However,the Division needs these tasks separated because of how they are entered into our cost estimating system. The exact distribution of the maximum exposed length of highwall between pits P125A and P125B cannot be predicted with certainty. However, for the purpose of facilitating a cost estimate, the regrade and liner quantity estimates in Table 6 of Exhibit L have been split proportionally to the total length of each pit's crest: 5,196 ft for P125A and 5,940 ft for P125B. Rule 6.4.19 Exhibit S—Permanent Man-made Structures 30. Structure agreement forms were sent to some structure owners that were not listed as structure owners in the Exhibit S Structure List. Please update the following owners on the list, along with the affected structures: a. Kerr-McGee Rocky Mountain Corporation b. Snyder Oil Corporation c. HS Resources d. Weld County Department of Public Works e. City of Thornton f. Pasquale Varra All the above-listed structure owners have been added to the Structure Owner List in Exhibit S and on Map Exhibit C-1 except for HS Resources,to whom a reception number encompassing the Cogburn site is attributed; however, no structures belonging to them were identified. 31. Please note it appears that all the structure owners listed above are listed under owners of ROW and/or Easements in the affected lands. The structures these entities own just need to be listed as well. The structures for Kerr-McGee Rocky Mountain Corporation, Snyder Oil Corporation, Weld County Department of Public Works, City of Thornton, and Pasquale Varra have been listed on Map Exhibit C-1. 32. Evidence of a structure agreement sent to Pasquale Varra was provided under this Exhibit. The structure listed in the agreement was fences,however, fences are not the structure that was listed in the structure list. The list shows "mining/excavation pit, unpaved road", neither of which seemed to have been accounted for with the sent structure agreements. Please provide evidence that a structure agreement was attempted for the mining/excavation pit and unpaved roads. The Structure Agreement for Pasquale Varra was amended to include mining/excavation pit and unpaved roads. The updated agreement and notification were mailed on December 10, 2025; a copy of the letter and mail receipt are included as attachments. 33. The structure agreement form sent to Accord St. Vrain Valley Ranch, LLC only listed ditch laterals and fences. However, Exhibit S lists an unpaved road, farm field, culvert pipe, and diversion structure as structures within 200 feet of affected lands. Please show that a structure agreement was attempted for these structures as well. The Structure Agreement for Acord St. Vrain Valley Ranch LLC was amended to include unpaved roads, a farm field, a diversion structure, and a culvert pipe. The updated agreement and notification were mailed on December 10, 2025; a copy of the letter and mail receipt are included as attachments. 34. Please provide evidence of an attempted structure agreement for the water wells for Occidental Petroleum(Riemer, Joseph). A Structure Agreement for Occidental Petroleum's water wells was sent to Joseph Riemer on December 10, 2025; a copy of the letter and mail receipt are included as attachments. 35. Although there are structures on site that are planned to be removed by the structure owner, such as the various Oil and Gas structures, Structure Agreements will still need to be attempted. The applicant must still provide a structure agreement for these structures until they have been removed or relocated by the owner. It's mentioned that agreements for these structures have not been received, but the Division still needs evidence that agreements were attempted, or it must be demonstrated through the engineering evaluation that the structures will not be impacted by the proposed operation. Notification of the Cogburn Sand, Gravel, and Reservoir project has been mailed to all owners and suspected owners of oil and gas facilities within the proposed permit boundary. Notifications were mailed to Kerr McGee Gathering, Kerr-McGee Rocky Mountain Corporation, HS Resources, Snyder Oil Corporation, Resource Gathering System, and Panhandle Eastern Pipe Line Company on April 1, 2025, and were submitted to the DRMS as an addendum to the Preliminary Adequacy Response. A notification was mailed to Kerr-McGee Oil & Gas Onshore, LP on December 10, 2025, and is being submitted to the DRMS as an addendum to this Second Adequacy Response. In addition, as specified on page 7 of Exhibit D, extraction will occur no closer than 25 feet from well heads and related aboveground oil and gas infrastructure. Rule 6.5 Geotechnical Stability Exhibit 36. Please see the Technical Review letter from Ben Hammar,DRMS sent on November 10, 2025, regarding the Slope Stability Analysis provided, and address the items detailed in that letter. A response to the Geotechnical Technical Review letter from Ben Hammar is attached to this comment's response letter in a memo by AWES. The analysis of the expected maximum depth excavation of 50 feet uses a steeper slope of 2.35H:1V to show the degree of conservatism in the proposed 3H:1V slope. Additional Items: 37. The Division received timely objections to the application from the Last Chance Ditch Company and Acord St. Vrain Valley Ranch, LLC. Please respond to any jurisdictional concerns (e.g., groundwater, surface water, wildlife, impacts to structures, offsite damage) identified in these letters and revise the permit application as needed. A combined response from RESPEC, ERO, and AWES to the Acord St. Vrain Valley Ranch, LLC objections is attached to this comments response memo. An agreement with the Last Chance Ditch Company is in preparation and will be submitted as a supplement to this response once finalized. 38. 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. A receipt of submittal for the Preliminary Adequacy Response from the Weld County Commissioners dated September 10, 2025, is attached as an addendum to this response. T �T'� _ .,�' ��f!'iY .i��a -�� • .;:� Y' . . .�+rF �'--. :, ��+ �merican Water EnsEineerinaE Services, LLC � December 10, 2025 Division of Reclamation, Mining and Safety 1313 Sherman St,#215 Denver, CO 80203 RE: Comments on Stability Analysis 112C Permit Application Adequacy Review DRMS Letter Date October 15, 2025 Attn: Mr. Ben Hammer Dear Mr. Hammer: This letter provides responses to a review of the Slope Stability Analysis 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 comments presented by Mr. Ben Hammar in the Division of Reclamation, Mining and Safety(DRMS) internal memo dated October 15, 2025. The following summarize DRMS comments by item. 1. Per Rule 6.5(3), please provide an additional slope stability analysis which demonstrates an adequate Factor of Safety under seismic conditions for an entirely 1.25H:1V slope up to the proposed maximum depth of approximately 23 feet bgs. Per the policies of the Mined Land Reclamation Board, a factor of safety of 1.15 under seismic conditions is the requirement for this case. This analysis was done. A copy of the output is presented as Attachment A. For the case at hand the predicted FoS was 1.286 with seismic loading. 2. On page 3 of the original Geotech section, the applicant states that the unit weight values provided for the overburden clay and bedrock layers were reported by DRMS. Please provide more information about the source of the unit weight values for these layers,as the Division does not have a formal database of material properties. Mr. Peter Hays of DRMS provided suggested soil parameters in an email to AWES and the Division of Minerals and Geology also published suggested soil shear strength parameters in a 2003 memo. Both memos are provided as Attachment B. 3. In the provided response,the applicant states that"The 25 foot simulation was ran with a seismic acceleration factor of 0.075, which is the value the Universal Building Code has specified for the Front Range area. The predicted factor of safety for fifty-foot simulation was 1.11." The case which initially led to the FoS of 1.11 is unclear, as both 25 feet and 50 feet are stated to have been run using the conditions described but only a 50 foot depth case is provided. Please provide additional information which clarifies the inconsistency mentioned. The reference to a 25 foot case was a typographical error and the correct FoS for the 23 foot case is 1.286 and is shown in the attachment. The 1.11 FoS was associated with the original 50 foot pit configuration in the initial permit application when seismic loading was applied. A 50 foot pit stability analysis was ran with a slope transition from 2.35H:1V to 1.25H:1V at 23 feet below grade. Response to DRMS Comments October 15, 2025 Response Letter Page 2 4. In the additional seismic analysis provided, the applicant uses a maximum depth of 20 feet of 1.25H:1V slope to attain the FoS of 1Z6.The newly proposed maximum depth of 1.25H:1V slope of 23 ft appears to be less conservative than the case provided. Please provide either a new case which uses the 23 feet depth or a statement which adequately explains why those cases may be used interchangeably. An analysis using a 23 foot pit depth resulted in a FoS value of 1.286. We have modified our 50 foot pit depth analysis to have a slope transition at 23 feet below grade changing from 1.25:1 to 2.35:1. The predicted FoS for the 50 foot pit depth analysis was 1.267 using a bottom slope steeper than 3H:1V.All analyses were ran using seismic loading. If you have any questions or need additional information, please contact me at(970) 590-3807. Sincerely, AWES, LLC �� Joby Adams, P.G., REM Principal/Hydrogeologist ��N �S t�l 1 1�ur�lar/ � u�l.f� rt/ � Ilin�.1 / �I 7I t I11 i 11 t�l ! ATTACHMENT A PC STABL MODEL OUTPUTS P�oeiam�. zs Fooe s�mwaeo� w�m sa�sm�o - Fs m�o- e�snop = � zas o �. P�oeiam�. Piaea n - so Fooe s�mwaeo� w�m sa�sm�o - Fs m�o- e�snop = � zs� �/ �ra� a �ra�s - � - - � - �ra� ,o � ATTACHMENT B DRMS MEMOS Joby Adams From: Hays - DNR, Peter <peter.hays@state.co.us> Sent: Thursday, March 20, 2014 9:06 AM To: joby Subject DRMS Typical Soil Values ,Toby, The soil pazameters I typically use for stability analysis are below. Nu]aWrs�ary�ven�A tesl�w4rc performed on soils ee the.,ite. The soii slrtngth p'arame�ns ucrsf werc taseA on�ypical ealue�frn Ila anticipamd xoi1.a�M oar upeocnce wakmg wu�f�ftMS m aher xites in the area. Thr imwt aitcngth parametcrr were: �� MaNGNt SeixmJsdl�d/ 1iBieuve4oAnw� ��b. Fricnow . Wi Ju � N' 'Ft 1� AwR4(MRna OverMudevcG� � 114 I 125 � I50 18 $ud xM osl 170 67 ' 0 � i9 _ CL l� f 16 i 19 - ^�0 a° M'dAnNResidual i24 lyi 9 li tinen �RcJmck (lvimxtladmct 12s l.la Sd0_. 22 Peler S. iIays Environmental Prolection Specialist Division of Reclamation, Mining & Safety 1313 Sherman St. Rni 215 Denver, Colorado 80203 303.866.3567 Ext. 8124 (Phone) �03.832.8106 {Fax) p�ter.hays�i�state.co.us, i 5TATE �F CC�LC�RADO DIVi51QN OF MIfJERALS AND CEOIQGY Depsmnent of Naiurai Resources . � 1313 Shemian A.,Reom 215 � O��r�� D I V(5 1 0 N O F Pinnr.(3031866-3567 - Fnx:t3o3)a3z-e�o� M I N E�RA L 5 GEOLOGY DATE: Marchi2�ZOO3 MININGMS FETy TO: Peter Wayland,Weiland Sugnet,Inc. 8°'°"R'^� Co�mwr FROM: Allen Sorensan 7/��7- �^ �aEw'i`n�` !� 6man�re oirenar Raald W.Gtany . '�� Saggested Causervative Soil Shear SYr¢ngyt Porrsneede�s ��o� jar Stability Analysea Given that these strengfh vatues>in partioular the residuat strength valne for the weatLered bedmck, represent the woist-cace for potentia�slope instability,any safety factor 9n excess of one should be prot�tive of ctitieai strucbues. ' LAY,sandy,soft to stiff,very moist to wet,brown(CL): i �' =28��s c' =50 psf moist unit weight=114 pcP saturated unit weig6t= I26 p�,-f . S�AN_D,�ne grained,clayey, silty,very loose,very moyst to wet,brown(SC, SM); fb' =2S degrees o' = ld psf moist unit weight=90 pcf saturated unit wei�'6t= 1]5 pcf S?.1VD hne grained,c]ean to slightty silty,dense,wet,brown(SP,SP-Slrf): rb'=3 T degrees c'=0 psf moist unit weigt�t= 117 pcf saturated unit weight= 13Q pcf �t1ND&GRAVBL,fine to coarse grained,some cabbles,clean 2o slightly silty,very dense,wet brown(SP,GP): �'=35 degrees c'=0 psf moist unit weig6t= 130 pcf saturated unit weight= 137 pef WEA RFn euar F,this is an wer-consolidated atiff-fissured ciay,so Yhe residual strengtL vatues are appropriata to the analysis: D' =14 degrees c'-0 psf moist imit weig6t= 125 pcf saturated unit weight= 142 pcf <:�u�ry oo��u�n�ciRos�nw�,��.aa - : , ,� �'� ' - - ,3' � �' � �W�s� LLC ��f~ ;�, �.�- �:�- Fort Collins, Colorado, US� November 5, 2025 Mr. Garrett Varra Raptor Materials, LLC(Raptor) 8120 Gage Street Frederick,Colorado 80516 RE: P125 Mine Dewatering Weld County,Colorado AWES No. 2025-RM-P115 Dear Garrett: You have inquired as to the influences that dewatering the proposed P125 mine may have on the local groundwater hydrology. Specifically you indicated that an objection has been issued by a local resident regarding the influence the proposed P125 mine might have on established vegetation. You provided a figure that identified four areas of concern. This figure (Figure 1) is attached and the areas of concern are identified as MW-1 though MW-4. My comments on this issue are provided below. I used a numerical model (Visual Modflow) to predict current water levels associated with active mine dewatering within the study area. I then modeled dewatering the two proposed P125 cells identified as cells A and B. The active mines and proposed P125 pit(s) are depicted on Plate 1. A model run using existing conditions (active mining) was used as the calibration model. The proposed P125 pits (cells A&B) were then modeled to predict hydrogeologic influences. All model runs were steady state. All model generated outputs are included in the Plates attachment. Model simulations for dewatering Pit A indicate drawdowns in the areas of concern ranging from 0.24 feet (MW-2)to 2.74 feet (MW-3). For Pit B, predicted drawdowns range from 0.96 feet (MW-2) to 4.79 feet (MW- 3). The average drawdowns for Pits A and B are 1.21 and 2.60 feet, respectively. It is our understanding that Raptor does not plan to dewater Pits A and B concurrently, and this scenario was modeled with negligible change to the maximum predicted drawdown. Drawdown will be greatest within the first few hundred feet of the mine face and will decrease exponentially with distance from the pit wall. It should be noted that dewatering associated with the Varra pit P115 (Kurtz) began circa 2004 and additional dewatering was occurring in the Varra Heintzelman pit P116 and LG Everest Pit, just to the south and southeast of the areas of concern, by mid 2017.A review of aerial photographs for this time period to present day show that riparian trees were not impacted to any observable degree. If you have any questions regarding this letter or attachment, please contact me at 970-590-3807. Sincerely, AWE5,LLC �� Joby L.Adams, P.G. Principal Hydrogeologist `��w�s 48��J Four Star Court,Fort Collins,CO 8�524—�J7�-5�J�-38�7 FIGURE Figure 1 - Areas of Concern -�- ��--�, �. � . -� `� .,,,�„�� N _ �, r. .� � ` � , , �;' Hnde( � . «i� - �,� �� +��:, �d' �' �. � • _ ��`�r- , �' . _:..a�.*.s . � 'y � ,` a � ��- �d""-` �,! � • � '� i:T► � _ � ` � � , � ! � 2 � • � i , � � ,� . ��' ��'� - MW-2 . . � � , � � � � � � `� � � . �,+� � , � � 1i ' . w� ;�r. 'W �' '� . i� � - i � , �• ' - , . � • ` , •►s� ' � .Y �y ' ' _,i �,-. �:..� _ 1� � r � �\� � . ��i � �— y�_ r ` _.1 � . � • � 't� IF'• , I �,�' . �,,R J ' .� L j , .� r-- , —,'�' � { � � .t��'�1. `" ;[ . � . _ •. � • . _• �ir� . � __ �r a► � � * .� ,MW_1 �� f � ` y� �, _ � . _ — b "' ' . .:�. _� �..� � '� � � � d� �' �� .� � I� � , MW-3 ,, , � • _ �" ' • � � '�^ � � � ` � � � �� - r �.� � � • MW_4 � " ' '�r�..` . . . �,� '`� . '---- _ ------- -�- ��--�- � - _ �"''"�_�! � Ir s� J ' � �,� w .",;�I�� . � �i�.. ""�_"'_` � �, � �� r � � ` . � ��-.� � � -r�, � � ^�� " � ��' �-� �;�� ,� . ti, , � � ^ �- ' �� _ � ��.a��'rn� �r��r. �-�� - .,,.a I�rs; fY� . � Note: Approximate Scale (ft) i 0 N858' N1716' PLATES PLATE 1 - Model Boundary Conditions 0 N � Q7 o -' �'�'d '�: � � ,• �. ;, � ; � , �, ��'� .'++� -,.- --__� -- -- � ; N `,.r'�ii�4`�, _..�_ _�_ _. ��,� ,-,�,�- �-- � .�� . - '�" � k t�' �_ - 1?' ' 1� � �y �_ � ^ __ - .r ..4� . �� 0 1�-.-�� _ _ O � v � O O � 7 � MW-2 � � 0 0 � MW m - �' � � �� , '� - — MW-� � _ _ .- ..�,r�. � .. ��"C: .�.�' N I i �' W 4 - - '"'- :p,, ... wwwr ■, f�, � - � .._��" . 'i� �;��' �1 ,II II 0 0 2000 4000 6000 8000 LD000 LL986 P125 Pits A&B Boundary Conditions AWES, LLC ProjecY: Raptor Pit125 970-590-3807 Modeller:J Adams PLATE 2 - Calibration Graph Calculated vs. Observed Head : Steady �tate ■ Layer#1 95%confidenee interoal — 95°ffl interv�l f � M O -_. 9f] � I MV1�-1 � i Qbsenred=478Q.35 Calculated=4780.35 i i IVfUhI-3 /� �� j Obsenred=4779.8J Caicu4ated=4779.89 i � � � �a m � a� _ °�° m°�' m � � � U �J � I U I � � ' � f r' f': M'u'U-2 Observed=4778.42 Calculated=4778.42 � � �' 4779.38 4780.38 Observed Head (#t} Num. of Data Points: 3 Max, Residuai: 0.4Q5(ft)at MW-2/MW-2 Standard Error of th�Estirnake: 0(ft) Min. Residual: 0 044(ft) at MW-3/lNV+J-3 Root Mean Squared : 0.004{ft} Residual Mean : d.004(ft) Normalized RMS :0.231 {°/p) Abs. Residual Mean : 0.004{ft) Correlation Coefficient : 1 P1?5 Calibratic�n Grapll -- - r ---- AVv'ES, LLC �'roject: Raptor Pit123 97U-590-3807 Modellet�: J Adains PLATE 2A - Calibration Graph Calculated vs. Obser►red Head : Steady sta#e ■ Layer#1 � 95°lo Gonfidence interval — 95%interval s� r� o � -- - � � ti v '� M1N-4 ' Observed=4779.9p Calculated=4779.90 / r i � I � � � I � � � � a� �M � N f� � �' I m" / U� f I C� ✓f i I I I � � � � !,{ � ; �vv-z I Observed=4778.42 Calculated=4778.42 � � -— — — --- —-- ' 4779.38 4780.38 Observsd Head(ft) Num of Daka Points: 3 Max. Residual:0.005(ft)at MW-2/MW-2 S#andard Error of the Estimate : 0.001 (ft) Min. Residual: 0.002{ft}at MW-41MW-4 Root Mean 5quar�d : D.00�1 (ft) Residual Mean : 0A04{ft) Normalixed RMS :D.209(°fo) Abs. Residual M�ean : d.004(ft) Correlation Coef#icient: 1 Pl?5 Calibration C�raph A�'E5, LLC: �rc�ject: Raptor Pitl25 _ 97(1-�90-3807 �Moc�cller: 1 Adams PLATE 3 - Cell A Dewatering Contours . .. . � � ��y '� �-' � r �, ��, � �� ,_� , � �; s � ��5 '5 �� ` � � a�"`4� � rr3"s �'�,.-A � � � Y �.: � �� - �' �, "�� ,� a ,�y�_ �'s �, �� o � � � � , ",� . 4- , r � � i ��" �i M�4 .,�p yi�q � ��i• �� , � f . 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S . �iS.� . h . � �'f7� 91� .. .��' ��' � . a " ' t' � '�� : �� I� � ' � G�� 'r.�:-s ' �"�`q ''��'. � �y�' � ' � :� . n �¢ & t��> �E � � � N �r�tR f�y,..� S t �4�. �4. w��'i _ �✓x :` ._, � ��,i4 4M� . ,� y.. #, . -q, X°� t� ' i3 . _. ,,. . : �'s,,,�ti � :`. "�h� : f k .. . . �.�� '- _,iF!'+-�. .. '� "�y'��, �4 ; � �'v", �� '` d: E .� sA- � �. _ X�nY.ffikn. �4�N s� y p � :� r,,.�.r� ' � < �,_ r h �k'�`�i��'� ,..yy, 4A�1��rz � { ��f ��+ ! `�a ,r. � �J w„� _ ��# �y� �` F-^- �'\ . � `� .-., . II dn�� "�� ,� ; i �,' `_y� � � ' '�.. �; - ,d }w�YW , � �Y i '. � � � '�'• v� A�.� ' 'aJ /' .�� t l '� I �� /� U '�'� 1 ' � � �1 . � V' i C1 (+ 5} � ��1�• ��'� �ffi�. .�f��',; l 1.' �._ a'�i� . � . � . � I . . I m:-`�. � .� _�, 10L�0 4C70C� FI]13;1 SOCO ]flp�7p I 1`.1i36 P I�� Celi A lle�v�tter AW'F,S, I,LC Project: Kaptor Pitl?5 970-�90-3�307 Madeller: J Adams PLATE 4 - Cell A Dewatering Graph Calcula#ed vs. Qbserved Hea�d : St�ady state � � ■ Layer#1 0 95%canfidence interval o� : fIF�' — 95°10 interval N i � I ��'� Qbser�ed=4760.35 CalculatecE=4i79.69 /,; � � � rn ; � � ; ,�, �ti : � �s- �'� MW-4 � , �bserved=4779.9i}Galculated=4778.72 � ,l i � � , U 49 ' � �W'� ;'� Observed�4778.42 Calculated=4778.18 o � �� I � � ti : v / / ,/ MW-3 a .�� bserued=4779.89 Cal�cu4ated=4777.15 ; ti ti n � � . 4778.49 4779.09 4780.a9 Observed Head{ftJ Num. of Data Points 4 Max. ResicivaL -2.735(ft)at MW-3!#VIW-3 Sfandard Error of the�stima#e:4.546(ft) Min. Residual:-0.238(ft)at MW-2/MW-2 Root Mean Squared � 1.53{ft) Residual Mean : -1203(R} Norrnaliz�d RMS : 79289(°f� ) Aba Residual Mean : 1.2d3(₹i} Correl�tion Cqefficlent:�}.357 I'135 Cell A 1)e�vaccr — _ _ _ — AW�:S, LLC. 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Residual Mean :2 5$7(ft} Correlation Coefficient: -4.094 P l?4 Cell B Der��a#ei• AWES, LLC Project: Raptoi• Pitl�� 976-59(l-;��7 'Vli�deller:J .�elams PLATE 6A - Cell B Drawdown Graph Calculated vs. Observed Head ; Steady state i �ayer#1 � - 95%confidence interval — 95°!o interval I I� f � � � �' i �' � � � v MW-1 ,� � Observed=4780.35 Calculated=4777.66 � •� i = I � i I � I �/ �' / ■ � � fU W � � /// I � I �� I � I M1 ' � /� I I / /� / MW-3 oa �� Obsenred=477$.$g�afculated=4774.92 ti I v ,� � 4774.S 1 4776.81 4778.81 Observed Head(ft} Num. of Data Ppints:4 Max. Resfdual: -4.973(ft}ai N!W-31MW-3 Standard Error of the�stsmate: d.864{ft) Min. Residual: -D.871 (ft) at MW-21MW-2 Fioot Mean Squared :2.989(ft} Residual Mean :-2.587(ft) Narrnalized RM5 : 154.852(°lo) Abs. Residual Meen :2.587(ft) Gorrelation Caef#rc€ent -0.094 1'l21 C.el[ B Uewater AWCS, LLC Project: KapEor Pill°?5 ' 97fi-590-a807 Mndeller:J Ada�ns PLATE 6B - Cell B Drawdown Graph � Calcu�ated vs. flbserved Head : Steady state I ■ Laysr#1 ' ----- 95%canfidence inter+ral � 95%irtterva4 I � m �� ! I r-- v r . -ra �W_Z ' = i Qbsenred=4778.42 Calculated=4777.55 ■ � , � � v � m , 3 � U �l� U i O3 � c4 � � � I M W-3 O0 �f C3bserved=4779.89 Calculated=4774.92 v ,� � ti n r'`' � a , 4774.81 477&.81 4778.81 Observed Head(ft) Num.of Dat3 Poin#5: 4 Max. Residual -4 973(ft) at MW-3/MW-3 Standard Error of the Estimate:0.884(ft} Min. Residual:-0.871 (ft)at MW-2IMUV-2 f2aot Mean Squared :2.989(ft) Resrdual Mean: -2.587(ft� hformalizec!RM5: 154.852(°fa) Abs. €2esidual Mean :2.587(ft) Correlation Coefficient:-0.094 P l25 Cell B Dewatec AVkJES, LLC �Prc7jcct: Raptc�r Pit12S �I 97(}-�90-�$Q7 �Mc�deller. J Adams I I Denver 1626 Cole Boulevard, Suite 100, Lakewood, CO 80401 Durango 835 East 2nd Avenue, Suite 314, Durango, CO 81301 Grand Junction 715 Horizon Drive, Unit 301, Grand Junction, CO 81506 EROResourcesCorporation Idaho 7154 West State Street, Suite 398, Boise, ID 83714 December 17, 2025 TO: Garrett Vara, Entitlements Manager Raptor Materials 8120 Gage Street Erie, CO 80516 FROM: Marie Russo, PWS, Biologist RE: P125 Gravel Mine, Weld County, Colorado Response to Comment Objections from Acord St. Vrain Valley Ranch, LLC ERO Resources Corporation (ERO) is providing this Summary Memorandum to communicate the review of the comment objections from Acord St. Vrain Valley Ranch, LLC(Acord) regarding potential flooding, water drawdown causing potential tree death, and significant damage to wildlife due to the establishment of the P125 Gravel Mine in Weld County, Colorado. ERO reviewed the comment objection from Acord regarding flooding of the Acord property and causing permanent damage to Acord structures due to any berm that is constructed on the P125 Gravel Mine. Floodplain permitting is not a part of the current application and will be addressed when a floodplain permit is required for project approvals. ERO reviewed the comment objection from Acord regarding the draining of subsoil moisture which will kill Acord's trees; these trees are considered permanent improvements to Acord's property. ERO believes that many of the trees on Acord's property would not be affected by the draining of subsoil because many of the trees are currently receiving water from laterals from Last Chance Ditch (light blue lines on Figure 1),which feeds irrigation features.The trees also receive water from an unnamed tributary to St.Vrain River (dark blue lines on Figure 1)that is partially fed by water from Last Chance Ditch. ERO identified 1 dead tree grouping(red circle on Figure 1) and 12 tree groupings fed by irrigation laterals (yellow circles on Figure 1). Additionally, ERO reviewed the AWES, LLC dewatering memorandum (Awes memo) and other literature related to tree die-off due to groundwater drawdown (AWES, LLC 2025; Scott et al. 1999; Chapin and Paige 2013).The literature indicates that most of the riparian ecosystems along the Colorado Front Range are dominated by plains cottonwoods (Populus deltoides subspecies monilifera). For the purposes of this discussion and since the Acord comment objection did not specify the types of trees that would be affected by the P125 Gravel Mine, ERO assumes the trees on the Acord property are plains cottonwoods. ERO Resources Corporation Consultants in Natural Resources and the Environment www.eroresources.com Garrett Vara, Entitlements Manager Raptor Materials December 17, 2025 Figure 1.Tree grouping locations and hydrology sources on the Acord property. �- � e; � a � �� ;�i � ��" � ��'- ��,; � ' �A •r, � �-' r � � , :f R� ,�� e . �`+'e.��•; ' /� ./ f �k „,��.s �`� ' !: . r, � � �' � . �� 1.,'M� � � ' - �'� � u� � ��, l � , .<'7 .j. � . e' �`�,, ��, ,,., n �: - _..r -- —3� , �� ;, �/ ' , .�'''ll°��;$.- _ e,,'�"� '+T� � `+` �M�, � /� �' ` ��, ,.. u' J. P .. . ' �� . (� ' ' .�.� � � � � r ' I,. /� .: � '�� Y.i � ' -- �� ';' i • � R � . r —�" / � �:', � � �k � �i,� �� s-i. , r° � A,� �j�_,,�� :,�y,'" . - I ,/ t';1 r;. �(� �t F'�' ! �, � � '. '�' ;� , ,,�,� ' ' � � , } ' ��,,, 1. ,. , � ��, � - - ;� ��;��t:. ,. , r � - ' �� ' '�� •' ! � , Y :E��.� � I� I .. � �; � �. t, f: �-� r •! �� , r- ,`�; : i .9 ��'r ��{ � t:.� '��C ' r � w �a. rJ• . � - .. � .j �,4� � . �i f• ( `�/ �� . � �4' _ . I^ `[:. .�� . �_. _. ._._.,_..__ '_..��.:i_{�—H. ,'. � �� _ . � � I . ~\+ .� a� . . . � .. . - H. ' � � �'• ��,� , ��^ � �',"�, . �� k �'4 .. Y '� "'� /r. � t�y':�� '�� 1��.. `!l� . � . �� ' � �� 'F . A. _ � ��g j:,� � _ t �`• G :�� . �. >: .� � '' _ ��`. � ` � ' � / � '. i � � ' t �x+ �� - .�� .�p! I .u� �4, :(.•. ((� .;�, .'.��. -�r `� sm��,•��,, _.+��-- . ...-. �.. .., ,,� r. 1` 1�� yr,_ � _ ::.'l� ' f 'i, -- `�`.w:h = - - -_ '�9lMir1 . ._. � � � '''1 j ( ��'� � � C�� f ?t ,.� �:' �t j ` j ��' .• � � '� � ��; . �' � . , � . .-�',�. ,,., .,. . . � � .� . �. . ...��.�,e�t�n��.. . ��r�<.�� ERO Resources Corporation Consultants in Natural Resources and the Environment Page 2 Garrett Vara, Entitlements Manager Raptor Materials December 17, 2025 Plains cottonwoods have a high tolerance (low mortality) when drawdown is less than 1 meter(3.28 feet) and have a low tolerance (high mortality)when drawdown is greater than 1 meter(3.28 feet) (Scott et al. 1999).The Awes memo identified two dewatering pits on the Acord property: Pit A and Pit B. Pit(AWES, LLC 2025). Pit A is on the east side of Last Chance Ditch and would have drawdowns ranging from 0.24 to 2.74 feet(average 1.21 feet) according to the modeling data (AWES, LLC 2025).This drawdown range is less than 1 meter and,thus, plains cottonwoods have a high tolerance and low mortality under these conditions (Scott et al. 1999). Pit B is on the west side of Last Chance Ditch and would have drawdowns ranging from 0.96 to 4.79 feet(average 2.60 feet).This drawdown range includes depths greater than 1 meter and,thus, plains cottonwoods could have a low tolerance and high mortality under these conditions (Scott et al. 1999). The Awes memo does not include irrigation water inputs from the laterals associated with Last Chance Ditch,which seasonally provides direct water to 12 of the tree groups (yellow circles on Figure 1) (AWES, LLC 2025). It is ERO's opinion that unless irrigation activities cease concurrent with drawdown, these 12 tree groupings would not lose their main water source (irrigation) and,thus, would not be significantly affected by drawdown of any depth. No tree death is anticipated to occur under these conditions (+irrigation/-drawdown). If irrigation activities cease concurrent with drawdown (-irrigation/- drawdown),tree death may occur should water drawdown depth reach greater than 1 meter. Should irrigation activities cease concurrent with drawdown (-irrigation/-drawdown), Raptor Materials is willing to provide supplemental water to support tree survival. ERO reviewed the comment objection from Acord stating that the proposed mining operation will likely cause significant damage to wildlife on Acord's property, including permanent disruption of historical wildlife migration paths along and across St. Vrain Creek. Raptor Materials has been actively working with Colorado Parks and Wildlife and the U.S. Fish and Wildlife Service to address and mitigate impacts on wildlife. Raptor Materials has received a communication from Colorado Parks and Wildlife stating no further comments which indicates that Raptor Materials has adequately addressed potential impacts to wildlife in their permit application. In summary,floodplain permitting is not a part of the current project application and will be addressed when floodplain permitting is required for project approval. ERO believes that tree die-off is unlikely to occur unless irrigation water inputs cease concurrent with drawdown (-irrigation/-drawdown) and, should this happen, Raptor Materials is willing to provide supplemental water to support tree survival. Raptor Materials has addressed potential wildlife impacts with Colorado Parks and Wildlife and will continue to work with the U.S. Fish and Wildlife Service to address any and mitigate impacts to federally protected species. �� SIGNED: Marie Russo, PWS, Biologist ERO Resources Corporation Consultants in Natural Resources and the Environment Page 3 Garrett Vara, Entitlements Manager Raptor Materials December 17, 2025 References AWES, LLC. 2025. "P125 Mine Dewatering Weld County, Colorado,AWES No. 2025-RM-P115." November 5. Chapin, David M., and Dwayne K. Paige. 2013. "Response of Delta Vegetation to Water Level Changes in a Regulated Mountain Lake, Washington State, USA." Wetlands 33 (3):431-44. htt ps://d o i.o rg/10.1007/s 13157-013-0401-5. Scott, Michael L., Patrick B. Shafroth, and Gregor T. Auble. 1999. "Responses of Riparian Cottonwoods to Alluvial Water Table Declines." Environmental Management 23 (3): 347-58. https://doi.org/10.1007/s002679900191. ERO Resources Corporation Consultants in Natural Resources and the Environment Page 4 COL4RdDQ � � Division of Reclamation. Mining and Safety Departmenk of NaturaV Resources Date: October 15, 2025 To: Joel Renfro, DRMS From: Patrick Lennberg, DRMS RE: Cogburn Sand, Gravel, and Reservoir Project, New Permit Application, Adequacy Review No. 2 Review Memo, File No. M2025-016 On April 17, 2025, I was requested to review Exhibits C through G of the Cogburn Sand, Gravel and Reservoir Project new permit application, file no. M-2025-016. On September 12, 2025, the Applicant submitted their responses to the Division's Preliminary Adequacy Review. Below are follow-up questions that should be addressed. General 1. Monitoring well MW-6 is in an area that is to be backfilled. Please discuss how MW-6 will be maintained throughout the life of mine. 2. The analytical results provided are confusing. It appears that there were samples collected twice during the fourth quarter 2024. A primary and duplicate sample from MW-3 on 11/13/24 and there are field parameters for that day although it is unclear when these parameters were taken, at the beginning or end of purging, and the purge volume is not clearly indicated?Then there is another sample that was collected from P-125 on 10/31/2024 but there are no field parameters associated with this sample nor is there any indication where this sample was taken. A response is required. 3. For the 1Q2025 samples were collected from MW-2 and MW-3. While field sheets were partially completed the only field parameters provided appear to be from a notebook completed separately. The total purge volume for MW-2 was 3 gallons which appears to be correct for a 3 well volume purge. However,for MW-3 the purge volume was also 3 gallons for 3 well volumes but a review of the construction logs indicates that close to 4 gallons need to be removed to complete a 3 well volume purge. A response is required. 4. The field sheets for the 2Q2025 are not completely filled out.The sheets indicated field parameters are collected at the start of well purging yet the sheets show that 3 gallons have been removed, please clarify. Again, based on a review of the boring logs and well construction diagrams it does not appear that a sufficient well volume was removed from MW-3 to equal 3 well volumes. Typical volumetric well purging practices are to collect field parameters at the beginning of purging then pF COLO w 1313 Sherman Street, Room 215, Denver, CO 80203 P 303.866.3567 F 303.832.8106 https://drms.colorado.gov/ I �Q ' 1? 90' Jared Polis, Governor � Dan Gibbs, Executive Director � Michael A. Cunningham, Director �*i`� ��;�� «�r�� *�876� Adequacy Review No.2 Cogburn Sand and Gravel(M2025-016) Page 2 of 3 approximately every well volume, when three successive readings have reached stabilization,the sample(s) are taken. A response is required. 5. A summary table of sample results needs to be created that compares the analytical results to the relevant Regulation 41 standard and any exceedances highlighted. A review of the laboratory data supplied showed some exceedances of the relevant standards and it appears that Nitrite + Nitrate as Nitrogen was not sampled for. Groundwater Monitorin� Plan Review 6. In Section 2.3 Chemical Analysis, the groundwater quality monitoring plan is only for one well, a compliance monitoring well, sampled five times on a quarterly basis,this is insufficient.The Applicant needs to collect groundwater quality samples from all site monitoring wells, 6 wells total,for 5 consecutive quarters prior to affecting groundwater. The Baseline Groundwater Quality Report shall be submitted as a TR to designate the point-of-compliance, revise the analyte list and the frequency of monitoring as needed. 7. Monthly groundwater levels, from all monitoring wells, will continue to be collected until the completion of reclamation when water levels will be collected quarterly. 8. Based on the submitted groundwater potentiometric maps, MW-3 sits at a high point in a groundwater divide where groundwater either flows to the north or to the south it does not appear to be a suitable location for a POC well. A response is required. 9. In Appendix B, QA/QC, it is stated that duplicates will be collected one per 20 samples. A duplicate is required one per event, please update. 10. The well purging procedure needs to be more descriptive to include, at a minimum,the frequency that field parameters will be collected, what the field parameter stabilization criteria is, and how the purge volume is calculated for a given location. 11. Completed field sheets need to be added to the list of items expected in the quarterly report. Groundwater Model Review 12. Why did the groundwater model exclude locations MW-5 and MW-6? 13. In Tables 1-4 additional explanation of the values are needed. The groundwater elevations shown for MW-3 are 11 feet lower than any level that has ever been recorded at the location. The elevations used for MW-4, calibrated and predicted, are two feet higher than the ground elevation surveyed at that location. In Table 4 it shows that at complete build out the water level at MW-3 will be 6 feet higher than surrounding ground surface at that location. Yet in the conclusion section it is stated that the effects of lining the mined out pits will not adversely affect the regional groundwater hydrology. Adequacy Review No.2 Cogburn Sand and Gravel(M2025-016) Page 3 of 3 14. Please provide a discussion of possible mitigation measures that the Applicant could take in the event groundwater mounding or shadowing adversely affect the groundwater hydrology, include in the discussion the installation of underdrains and infiltration galleries. If you need additional information or have any questions, please let me know. Sincerely, Patrick Lennberg Environmental Protection Specialist cc: Jared Ebert, DRMS Q COLORADO � � Division of Reclamation, Mining and Safety Department of Natural Resources Date: October 15, 2025 To: Joel Renfro,DRMS CC: Amy Eschberger,DRMS From: Ben Hammar,DRMS RE: Cogburn Sand and Gravel and Reservoir Project,File No.M2025016 New 112c Application Joel, As requested, I have reviewed the geotechnical-related sections of the adequacy response provided by the operator for the Cogburn Sand and Gravel Reservoir Project application,DRMS permit No. M2025016, created by American Water Services, LLC(AWS) on behalf of Raptor Materials, LLC (Operator). Much of their geotechnical exhibit remains the same, and so only the remaining sections which require clarification and the additional exhibit provided in their response will be addressed in this memo. Questions and comments regarding the requested sections meant to ensure all Rules and requirements are sarisfied will be summarized at the end of this memo. Additional Geotechnical Analysis Overview As noted earlier, this memo will address the sections of the Cogburn Sand and Gravel Reservoir Project adequacy response requested by Joel Renfro,the additional geotechnical analysis associated with the currently proposed reclamation plan for the Cogburn Project. A summary of the new reclamation plan is included to provide context for the broader discussion of the analysis. Per information provided by in the operator's adequacy response, the Operator has amended their reclamation plan to adhere to a maximum slope of 1.25H:1 V on slopes less than 23 feet below the ground surface, and 3H:1 V below 23 feet. These slopes will then be lined with a clay liner to support the planned post-mining land use of a developed water resource. These slopes are the subject of the provided geotechnical analysis. AWS provided an additional slope stability analysis in response to the Division's comments,which primarily used material property information generated by a 2023 geotechnical study performed by Engineering Analytics, Inc. PGSTABL, a typical geostability analysis software, was used to perform the additional slope stability analysis. One additional case was studied, which represented 3H:1 V and 1.25H:1 V conditions. The provided case assumes 20 feet below ground surface(bgs) of 1.25H:1V slope underlain by 30 feet of 3H:1 V slope. The simulation assumed a seismic acceleration factor of 0.075 based upon the requirements of the Universal Building Code, a standard set of Civil Engineering guidelines used throughout the US �ew°Yp�� 1313 Sherman Street, Room 215, Denver, CO 80203 P 303.866.3567 F 303.832.8106 http://mining.state.co.us I I* � ,9�1 � °�� J a r e d S. P o l i s, G ov e r n o r � D a n G i b b s, E x e c u t i v e D i r e c t o r � M i c h a e l A. C u n n i n g h a m, D i r e c t o r �*��* *1876� and the appropriate reference for this case. The factor of safety found with these conditions was approximately 1.26 This analysis is generally acceptable; however, a few discrepancies were found in the response provided. In their response to the Division's previous comment requesting a seismic case study, the applicant states: "The 25 foot simulation was ran with a seismic acceleration factor of 0.075, which is the value the Universal Building Code has specified for the Front Range area. The predicted factor of safety for fifty- foot simulation was 1.11."This response makes it unclear which of the previously provided cases was used to attain the 1.11 FoS, as the applicant states two different depths in reference to the case studied. The proposed new maximum depth for 1.25H:1 V slopes also does not match the case studied,with the new maximum depth being 23 feet and the case studied being 20 feet bgs. A depth of 23 feet compared to 20 feet likely won't result in a FoS less than 1.15,however the geotechnical analysis provided should still match the proposed final reclamation slopes. In this instance, due to small difference in cases, a statement by the operator that the analysis performed by the operator is not significantly different from the final reclamation slope conditions In addition,the applicant appears to have only performed an analysis on the case where the maximum mining depth falls below their slope transition depth of 23.No seismic case was provided for an entirely 1.25H:1V slope. As this was directly requested in the Division's original comment,this missing case should be provided. Lastly,the applicant's statement that they took unit weight values for the overburden clay and bedrock layers from values reported by the Division should be addressed. The Division has no formal list of average material properties, and so this information likely came from another source. This source should be adequately cited in the operator's analysis. Recommendations In general,the analysis performed by AWS was performed using acceptable assumptions for the case that was studied. Some clarification should be requested to confirm their case is adequate to meet the FoS requirements of the MLRB. As such,the following comments should be integrated into an adequacy letter: 1. Per Rule 6.5(3),please provide an additional slope stability analysis which demonstrates an adequate Factor of Safety under seismic conditions for an entirely 1.25H:1 V slope up to the proposed maximum depth of approximately 23 feet bgs. Per the policies of the Mined Land Reclamation Board, a factor of safety of 1.15 under seismic conditions is the requirement for this case. 2. On pa�e 3 of the original Geotech section,the applicant states that the unit weight values provided for the overburden clay and bedrock layers were reported by DRMS. Please provide more information about the source of the unit weight values for these layers, as the Division does not have a formal database of material properties. 3. In the provided response,the applicant states that"The 25 foot simulation was ran with a seismic acceleration factor of 0.075, which is the value the Universal Building Code has specified far the Front Range area. The predicted factor of safety for fifty-foot simulation was 1.] 1."The case which initially led to the FoS of 1.11 is unclear, as both 25 feet and 50 feet are stated to have been run using the conditions described but only a 50 foot depth case is provided.Please provide additional infonnation which clarifies the inconsistency mentioned. 4. In the additional seismic analysis provided,the applicant uses a maximum depth of 20 feet of 1.25H:1 V slope to attain the FoS of 1.26. The newly proposed maximum depth of 1.25H:1 V slope of 23 ft appears to be less conservative than the case provided. Please provide either a new case which uses the 23 feet depth or a statement which adequately explains why those cases may be used interchangeably. This concludes my review of the requested sections of the Cogburn Sand and Gravel Reservoir Project application, created by AWS on behalf of Raptor Materials, LLC. If you have any questions, feel free to contact me at the information listed below. Sincerely, Ben Hammar Environmental Protection Specialist (720) 793-2988 ben.hammar@state.co.us //PAGE 1 BACKFILL N0TICE EXHIBIT E - BACKFILL NOTICE Inert fill may be imported, or utilized from existing on-site sources, to complete planned post-extraction reclamation to the proposed land use. The extent and location of fill will be field-determined to backfill P125_S1 and provide adequate material for the regrading of extraction areas in P125A and P125B as developed water storage. All inert materials used for backfilling will be consistent with DRMS Rules and Regulations, and those of the Colorado Department of Health and Environment. It is expected that the fill material will be sourced from adjacent Raptor permits, primarily P115-Kurtz (M1999-006) and if excess fill exists after final regrading, P122-Bearson(M2015-033'). The exact volume of material will depend on the geology of the deposit recognizing the amount of available overburden and the volume of extracted sand and gravel may differ from expectations. Pit floor material may also be cost effective for use as fill with the added benefit of increasing the capacity of the developed water resources. It is possible that no backfill import will be required.Based on models of the data available, Raptor expects a volume of material to be imported in the range of 0 to 400,000 cubic yards. The exact schedule for backfilling cannot be known with certainty due to extraction being market driven as well as operational adjustments to the extraction sequencing for product,safety,or even wildlife management considerations. Raptor, however,anticipates backfill may be imported at times from the second to final year of operation. All backfill material will be placed with sufficient fines to minimize voids and settling of backfilled areas and slopes. There are no known or expected acid forming or toxic producing materials or refuse at this location, nor will materials known to possess such qualities be knowingly utilized for fill. Any other refuse or reject materials that do not meet the definition of inert and requiring removal and disposal will be placed in closed containers and taken to an appropriate landfill for disposal,unless it is otherwise'inert,'per Rule 3.1.5(9),of the DRMS Rules and Regulations. All materials,whether extracted on-site or imported, will be handled in such a manner so as to prevent any unauthorized release of pollutants to surface or ground water resources. All fill will be integrated to meet or exceed the reclamation plan and correlated end uses authorized under the approved Colorado Division of Reclamation,Mining and Safety permit.Prior to importing fill,the source will be submitted to the DRMS through a Technical Revision that provides the anticipated dates of import,the approximate volume,and the material source2. All fill above the anticipated static water level of the resulting basins will be soiled and stabilized according to the approved reclamation plan,or as otherwise allowed according to this application or locally approved land uses.The location and extent of fill utilized over extracted lands will be designated in required DRMS Annual Reports,permit revision,or as part of any request for release of the permitted area,in part or whole. These representations are authorized as is or otherwise modified under the signed original approved DRMS permit,until or unless subsequently modified by an approved DRMS Technical Revision. 'Adequacy 2,Items 14,15 Z Adequacy 2,Item 16 . , �, Rapt A REGU AR IMPACT f11P]C0NST U�cT�I0N PERMIT A PLGATI0N I C0L RA O DIV SI0N 0F RECeAMATI0N MINING AND SAFETY,0FFICE 0F�MINED LAN�RECOLAMATI0N R E S p r CC � To: Joel Renfro Colorado Division of Reclamation, Mining and Safety 1001 E 62"d AVe Denver, CO 80216 From: Raptor Materials LLC(Robert Haun) 8120 Gage St Frederick,CO 80516 Date: August 21, 2025 Subject: Affidavit Mr. Renfro, I, Robert Haun, hereby authorize Garrett Varra to act on my behalf in matters related to DRMS permit administration through the Colorado Department of Natural Resources, effective August 21, 2025, through December 31, 2030. This authorization includes, but is not limited to: 1. Submittal of new permit file documents and third-party reports; and 2. Modification of existing permit file documents. I understand that Garrett Varra will be acting as my representative during this timeframe and will have the authority to make decisions on my behalf. I trust that they will act in accordance with my best interests. Please provide Garrett Varra with any necessary resources or access required to fulfill the authorized tasks. I will not hold Garrett Varra or any other party involved liable for any decisions made within the scope of this authorization. If this authorization changes, I will notify you immediately. Sincerely, Robert Haun Raptor Materials, LLC 720-698-2455 rhaun@eaglematerials.com • September 10, 2025 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,Preliminary Adequacy Response The original 1 12c 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 letter on July 2, 2025, containing 127 adequacy items,as well as two technical memos addressing groundwater and geotechnical considerations. The enclosed submittal, which addresses all items from the preliminary adequacy letter and two technical memos, constitutes a complete permit application, including all required narrative and map exhibits per Rule 6.4, 6.5, and 1.6.3(1)(b), as well as all pertinent addenda. A complete list of exhibits and addenda is presented in Table l below. Table 1.List of complete permii application elements for M-2025-016 PreliminaryAdequacy Response Exhibit/Letter Addendum/Enclosure Status from March 2025 A lication Exhibit A N/A U dated Exhibit B N/A U dated Exhibit C N/A New Exhibit C Ad'oinin Parcels List Removed Ma Exhibit C-0 N/A New Ma Exhibit C-1 N/A U dated Ma Exhibit C-2 N/A U dated Exhibit D N/A U dated Exhibit D Ra tor Products List Unchan ed Exhibit E N/A U dated Exhibit E Table E-1: Minin -Re radin Schedule U dated Exhibit E Exhibit E2 - Backfill Notice U dated Ma Exhibit F N/A U dated Exhibit G N/A U dated Ma Exhibit G N/A U dated Exhibit G CDPS General Permit CPG500000 Unchan ed Exhibwt G List of Groundwater Wells Unchan ed Exhibit G Piezometer Measurements U dated Exhibit G! Preliminary Groundwater Monitoring Plan (AWES, Updated Adequacy Comments D �eAte�b��0Z5� Res onse r� (, t �E� 1 U ��5 WELD COUNTY COMMISSIONERS Raplor Materials, LLC December 18,2025 December 18, 2025 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, ll2 Construction Materials Reclamation Permit Application, Response to Acord St Vrain Objections Dear Joel: Acord St. Vrain Valley Ranch, LLC ("Acord") was notified of the proposed Cogburn Sand, Gravel and Reservoir Project, ("Cogburn Project"),File No. M-2025-016, on April 1, 2025, in accordance with the notification procedure required by Construction Materials Rule 6 (6.4.19) for all permanent man-made structures of any significant value located within 200 feet of the affected lands. The Acord property is located adjacent southwest of the proposed Cogburn project, with structures within 200 feet comprised of fences and ditch laterals. The Division of Reclamation, Mining and Safety (Division/DRMS), Office of Mined Land Reclamation (OMLR)received an objection from Steven L. Janssen, legal representation for Acord St. Vrain Valley Ranch, LLC, to the proposed Cogburn Project on May 1, 2025, and transmitted this objection to the applicant, Raptor Materials, LLC, on May 23, 2025. We have reviewed the Acord's objections and trust the following reply will serve to fully address them. The original objections are enumerated below, with our comments boxed in blue text. Response to Acord St.Vr1in Valley Rauch,LLC May 16,2025 Objections M-2025-016 I 12 Construction Materials Reclamation Pern�it P ag e 1 Raptor Materials, LLC December 18,2025 May 16, 2025 Objections and Responses Application Form 1. The Public Notice provided by Raptor to Acard describes the proposed mine to be located "at or near Section 29" and the Certification provided by Raptor to Accord states that "Acord shall be compensated by Raptor for any damage from the proposed mining operation to the above listed structure(s) located on or within 200 feet of the proposed affected area described within Exhibit A, of the Reclamation Permit Application for Cogburn Sand, Gravel and Reservoir Project,File Number M-2025-016" yet the Exhibit A provided to Acord is reproduced in such a fashion that the actual location of Raptor's proposed mining operation cannot be determined, therefore Acord reserves the right to amend this Objection upon Raptor providing an exhibit to Acord from which the actuallocation of Raptor's proposed mining operation can be determined within a reasonable degree of accuracy; �'�tijl �=�`;illblt C-2., �l�d.�lC�I�C� 9�} � . �"'E�i ` 'T,l��lla,€��'S , i.. ,:;'+�;�;[1� O! �:'i'II➢�:�.�'i'- ' I�l'4,' �7E'C)�7{)54.':C� LX�'<11 c3�11}il Iflllit.'>. :S(�4.! 1�Z;�' .�('l4'4;; �"iC)lfll+ l > :1..' ��:'Stia�(,�b�i� ('�?4u<.l ,>�`:`:�. 2. Upon information and belief, Acord alleges that any berm to be constructed around the area actively being mined by Raptor will divert flood waters from the St. Vrain Creek unto Acord's property and will damage permanent structures owned by Acord, and without being able to discern the actual location of Raptor's proposed mining operation, Acord cannot provide further information to the Mined Land Reclamation Board as to what permanent structures of Acord will be damaged by any such flood waters, therefore Acord reserves the right to amend this Objection upon Raptor providing an exhibit to Acord from which the actual location of Raptor's proposed mining operation can be determined within a reasonable degree of accuracy; The proposed initial extraction area fo�-the operations is located outside the effective 100-vea� floodplain and therefoi-e will uot result in modifications to the extent or drainage of flc� � E_�.. r�riginating froin Saint Vrain Creek. See additional information in attached Respoi�7se t« >,�,,�� __ ,. _, . � .. � � _ . � _ , 3. Upon information and belief, Acord alleges that any excavation of the proposed mine will drain subsoil moisture from Acord's property which will kill Acord's trees,permanent improvements of material value, and without being able to discern the actual location of Raptor's proposed mining operation, Acord cannot provide further information to the Mined Land Reclamation Board as to what trees of Acord will be killed by such draining of subsoil moisture from Acord's property, therefore Acord reserves the right to amend this Objection upon Raptor providing an exhibit to Acord from which the actual location of Raptor's proposed mining operation can be determined within a reasonable degree of accuracy; and See response in attacllzd lZe.��.:• � ��J .., ._ ' ,� ��. „ ' _ ,`' , _„ t ��, �� . . ,, �;. -. � _ �d°. _. ; Response to Acord St.Vr1in Valley Rauch,LLC May 16,2025 Objections M-2025-016 I 12 Construction Materials Reclamation Pern�it P ag e 2 Raptor Malerials, LLC December 18,2025 4. Upon information and belief, Acord alleges that Raptor's proposed mining operation will likely cause significant damage to wildlife on Acard's property, including the pennanent disruption of historical wildlife migration paths along and across St. Vrain Creek. See t'esponse in attached Re.sd��,sE> to Cc�a�aanc>1ai �1,icc_�taoaa�� fi-r�a�� .-3c�r��c1�t I'�-crir� J'cr11e v e'Z�ra�c�.`: �l�emo (ERO, December 20��;. Response to Acord St.Vrain Valley Rauch,LLC May 16,2025 Objections M-2025-016 I 12 Construction Materials Reclamation Pern�it P ag e 3 P125 Platteville West Piezometer Well Id MW-1 MW-2 MW-3 MW-4 MW-5 MW-6 3 Well Volumes(gal)* Point Number 7023 7025 7029 7027 7019 7021 MW-2 MW-3 Top of pipe[TOP] (ft.) 4799.85 4789.63 4794.84 4789.29 4798.32 4800.91 2.5 2.3 Ground Elevation 4797.04 4787.04 4792.13 4786.52 4800.43 4798.32 *Calculated based on measured depths and Table Depth to Well Bottom 34.00 27.00 26.78 25.91 44.28 53.92 3.2.1 in the EPA Groundwater Sampling (measured)(ft.) Methodology(March 6, 2013) Depth to Well Bottom (constructed(ft.) 38 25 35 25 43 53 Measured Depth to Water(ft.)TOP to GW Elevation Date 7023 7025 7029 7027 7019 7021 3/29/2024 16.88 8.45 10.38 8.64 27.78 27.52 5/30/2024 15.02 7.21 8.58 8.64 22.62 23.88 9/27/2024 14.14 7.06 no access 8.94 19.37 19.21 10/25/2024 15.14 7.62 8.31 5.78 22.48 22.35 11/20/2024 17.00 8.11 8.72 8.91 23.83 24.21 12/4/2024 17.05 8.97 8.36 8.82 23.13 24.89 1/6/2025 17.89 8.86 9.34 9.08 22.14 25.68 2/4/2025 18.27 9.20 9.51 9.03 21.63 25.76 3/20/2025 18.55 9.39 9.60 9.26 21.74 26.06 4/29/2025 17.56 8.80 8.55 9.05 17.56 23.35 5/13/2025 16.80 8.40 8.45 8.73 16.27 22.40 6/23/2025 14.00 7.02 8.00 8.55 13.70 21.12 7/24/2025 13.60 6.65 7.70 9.25 12.70 18.80 8/28/2025 13.81 6.60 7.42 9.40 12.40 17.91 9/26/2025 13.61 6.32 7.36 9.52 11.29 17.19 P125-Piezometers MW-1 MW-2 MW-3 MW-4 MW-5 MW-6 7023 7025 7029 7027 7019 7021 Top of pipe [TOP] (ft.) 4799.85 4789.63 4794.84 4789.29 4798.32 4800.91 Ground (ft.) 4797.04 4787.04 4792.13 4786.52 4800.43 4798.32 Measured Bottom Depth 34.00 27.00 26.78 25.91 44.28 53.92 of Well (ft) Elevation of Well Bottom (ft.) 4765.85 4762.63 4768.06 4763.38 4754.04 4746.99 Elevation of Water(ft.) Date 7023 7025 7029 7027 7019 7021 3/29/2024 4782.97 4781.18 4784.46 4780.65 4770.54 4773.39 5/30/2024 4784.83 4782.42 4786.26 4780.65 4775.70 4777.03 9/27/2024 4785.71 4782.57 no access 4780.35 4778.95 4781.70 10/25/2024 4784.71 4782.01 4786.53 4783.51 4775.84 4778.56 11/20/2024 4782.85 4781.52 4786.12 4780.38 4774.49 4776.70 12/4/2024 4782.80 4780.66 4786.48 4780.47 4775.19 4776.02 1/6/2025 4781.96 4780.77 4785.50 4780.21 4776.18 4775.23 2/4/2025 4781.58 4780.43 4785.33 4780.26 4776.69 4775.15 3/20/2025 4781.30 4780.24 4785.24 4780.03 4776.58 4774.85 4/29/2025 4782.29 4780.83 4786.29 4780.24 4780.76 4777.56 5/13/2025 4783.05 4781.23 4786.39 4780.56 4782.05 4778.51 6/23/2025 4785.85 4782.61 4786.84 4780.74 4784.62 4779.79 7/24/2025 4786.25 4782.98 4787.14 4780.04 4785.62 4782.11 S/28/2025 4786.04 4783.03 4787.42 4779.89 4785.92 4783.00 9/26/2025 4786.24 4783.31 4787.48 4779.77 4787.03 4783.72 P125 Platteville West- Piezometers Wellld MW-1 MW-2 MW3 MW-4 MW-5 MW-6 Point Number 7023 7025 7029 7027 7019 7021 Top of pipe[TOP](ft.) 4799.85 4789.63 4794.84 4789.29 4798.32 4800.91 Ground(ft.) 4797.04 4787.04 4792.13 4786.52 4800.43 4798.32 Bottom Depth of Well(ft) 34.00 27.00 26.78 25.91 44.28 53.92 Elevation of Well Bottom (ft� 4765.85 4762.63 4768.06 4763.38 4754.04 4746.99 Measured Depth to Water(ft.)[Ground Surface to GW Surface] Date 7023 7025 7029 7027 7019 7021 3/29/2024 14.07 5.86 7.67 5.87 29.89 24.93 5/30/2024 12.21 4.62 5.87 5.87 24.73 21.29 9/27/2024 11.33 4.47 NA 6.17 21.48 16.62 10/25/2024 12.33 5.03 5.60 3.01 24.59 19.76 11/20/2024 14.19 5.52 6.01 6.14 25.94 21.62 12/4/2024 14.24 6.38 5.65 6.05 25.24 22.30 1/6/2025 15.08 6.27 6.63 6.31 24.25 23.09 2/4/2025 15.46 6.61 6.80 6.26 23.74 23.17 3/20/2025 15.74 6.80 6.89 6.49 23.85 23.47 4/29/2025 14.75 6.21 5.84 6.28 19.67 20.76 5/13/2025 13.99 5.81 5.74 5.96 18.38 19.81 6/23/2025 11.19 4.43 5.29 5.78 15.81 18.53 7/24/2025 10.79 4.06 4.99 6.48 14.81 16.21 8/28/2025 11.00 4.01 4.71 6.63 14.51 15.32 9/26/2025 10.80 3.73 4.65 6.75 13.40 14.60 Measured Depth to Water(ft.)[TOP to GW Surface] Date 7023 7025 7029 7027 7019 7021 3/29/2024 16.88 8.45 10.38 8.64 27.78 27.52 5/30/2024 15.02 7.21 8.58 8.64 22.62 23.88 9/27/2024 14.14 7.06 NA 8.94 19.37 19.21 10/25/2024 15.14 7.62 8.31 5.78 22.48 22.35 11/20/2024 17.00 8.11 8.72 8.91 23.83 24.21 12/4/2024 17.05 8.97 8.36 8.82 23.13 24.89 1/6/2025 17.89 8.86 9.34 9.08 22.14 25.68 2/4/2025 18.27 9.20 9.51 9.03 21.63 25.76 3/20/2025 18.55 9.39 9.60 9.26 21.74 26.06 4/29/2025 17.56 8.80 8.55 9.05 17.56 23.35 5/13/2025 16.80 8.40 8.45 8.73 16.27 22.40 6/23/2025 14.00 7.02 8.00 8.55 13.70 21.12 7/24/2025 13.60 6.65 7.70 9.25 12.70 18.80 8/28/2025 13.81 6.60 7.42 9.40 12.40 17.91 9/26/2025 13.61 6.32 7.36 9.52 11.29 17.19 Depth to Groundwater- Monthly 30.00 25.00 �, I i 20.00 > � t� O � w 15.00 __ � x a o � 10.00 � I 5.00 0.00 , ti� ti� tia ti� ti� tiy tiy ti� ti� ti� ti� ti� ,yO ,yO ,tiO ,tiO ,tiO ,yO ,yO ,LO ,yO ,LO ,yO ,tiO ti�� ti�� ti�� ti�� ti�� ti�� ti�� ti�� ti�� ti�� ti�� ti�� \ ,�o\ ti1\ titi\ ti\ ti\ 3\ �,\ �,\ �\ �\ �\ MONITOR DATE -�MW-17023 -MW-27025 �MW-37029 tMW-47027 tMW-57019 � _�� MW-67021 1316500��I PEAMITBOUNDAHY �--J Average Groundwater Elevations(Q3 2024) MW-4 1316000- � � �I �A/ - — � 1315500- --4782 / —— _ _ __ ___ �a3. 1315000-� 784— �4784-_ __-__ —--_ �� 1314500-I -��—��----- -4783 3 P125B �� 0.�$ -- — ¢ - a�sz 1314000- ��478 --- R��Z� — i 4781- 4�g1 /� - -- Q_ isissoo— �" p125p 4�g0 4119 1313000- p11g / W 5"'6�P125_S1 4j'� 1312500 1312000—, �i . . i i . i . 3162000 3162500 3163000 3163500 3164000 3164500 3165000 3165500 3166000 3166500 NAD 19S3�2011)State Plane Colorado North FIPS 0501 I�1 ' 11 � 1 1 �� 1316500��I PEAMITBOUNDAHY �Average Groundwater Elevations(Q4 2024) MW-4 1316000— � M W- —a�az � 1315500— SZ — 4783 —4784 1315000—� 783� �4785 1314500—I �Po P 125B a�sz � 47S1 1314000— � A�aA A�a2 � -4780' A�g1 1313500-� _4�g3 P125A R�$p 4779— ��9 4778 _ 1313000— � a11 S / 5 4��6\�ZU_S� 4»> 1312500 1312000—, �i . . i i . i . 3162000 3162500 3163000 3163500 3164000 3164500 3165000 3165500 3166000 3166500 NAD 19S3�2011)State Plane Colorado North FIPS 0501 I�1 ' 11 � 1 1 �� 1316500��I PEAMITBOUNDAHY Average Groundwater Elevations(Q12025) MW-4 1316000- � M W- !17S1 _ __ _ -____ . . ¢ - 1315500- ....__-_ 78t _--_._. � -"'7S2 _-_-. _ 1315000-� �7733 -----_ �� __ q784____ . ___,.. ,�, ___ � � _- isiasoo-� �� P125B W-3 1 � � ,�' � �41g�'. � i 1314000- _ 'Igg"�� _.q9j9-�� ;� ��' ��' � � P125A 1313500— -- � % �p / / / A� /Q�a� � ,� / � / _-49 0.�o�'� ., .._.. 1313000— �� / ,47 a��$' . P125 S1 , -- - / ws _ . 1312500 1312000—, �i . . i i . i . 3162000 3162500 3163000 3163500 3164000 3164500 3165000 3165500 3166000 3166500 NAD 19S3�2011)State Plane Colorado North FIPS 0501 I�1 ' 11 � 1 1 �� 1316500��I PEAMITBOUNDAHY -�Average Groundwater Elevations(Q2 2025) MW-4 1316000- � - - M V� ---- - -- ¢ ------ a�s1s- -'� 1315500- '"-�� 4782.5- -- --- --- -_ _ -- 47825--�-�� 1315000-� __.___ ___47845_ _________ .__-_�_..__4� ,.,.........__ 35%i _ _ S-, isiasoo! a�as - PT25B W-3 � � � A�aZS" � 1314000- + / � / � i� °�� P125A /a�� 1313500- � �� i A�ap. / h 1313000- o-.��'' / , � , P125_Sy a� � - i/ � 5 i% i � 1312500 1312000—, �i . . i i . i . 3162000 3162500 3163000 3163500 3164000 3164500 3165000 3165500 3166000 3166500 NAD 19S3�2011)State Plane Colorado North FIPS 0501 I�1 ' 11� � 1 1 �� 1316500 . PEAMITBOUNDAHY Average Groundwater Elevations(Q3 2025) MW-4 1316000-I � � MW- ___ ,s /� ¢ � _ 1315500-• � ' �� / �__ r787_.� � ` .<1783�... - � __________ ' 1315000- __------�---- �� 478a - _ _ - - - - _ - _ .785.�� . 4785 isiasoo—. __ P125B ��,. — , �� V�/-3 � A�aSs isia000-- A � P125A 1313500- ro , A? � i 1313000 , P125 S1 - ws — 1312500� � � 1312000—i . . i � . i � 3162000 3162500 3163000 3163500 3164000 3164500 3165000 3165500 3166000 3166500 NAD 1983(2011)Sfate Plane Colorado North FIPS 0501 I� . � 11 � 1 1 11 111 From: Renfro-DNR.Joel To: Robert Haun; Peter Christensen;Jenna Lohmann;Garrett Varra Subject: Fwd: Cogburn M2025-016 Wildlife Information Response Date: Tuesday,December 16,2025 11:26:34 AM Attachments: NEWCOLOGO Livelifeoutside-Transparent.�ng P125 Ex H Prelim Adea.odf Hey all, I wanted to forward this response we just got from CPW. Looks like they thought the updated Exhibit H addressed all their concerns, and they have no further comments. Best, Joel ---------- Forwarded message --------- From: _Area2_Landuse -DNR, DNR<dnr_area2_landuse cn+o state.co.us> Date: Tue, Dec 16, 2025 at 10:54 AM Subject: Fwd: Cogburn M2025-016 Wildlife Information Response To: Joel Renfro - DNR<ioel.renfron,state.co.us> Cc: Erin Priest - DNR<erin.�riestnstate.co.us>, Chris Mettenbrink - DNR <chris.mettenbrink�,state.co.us> Hi Joel, Thank you for reaching out to us with updated information on this project. After review, we believe that the applicant has addressed our concerns and implemented best management practices within reasonability so the project can move forward while minimizing impacts. Please let us know if you have any questions or need anything additional from us. Sincerely, Area 2 Staff Erin Priest, Chris Mettenbrink and Lexi Hamous Colorado Parks and Wildlife ---------- Forwarded message --------- From: Priest-DNR, Erin <erin.�riest(cr�state.co.us> ---------- Forwarded message --------- From: Renfro -DNR,Joel<�oel.renfro(a�.state.co.us> Date: Tue,Nov 25, 2025 at 9:23 AM Subject: Cogburn M2025-016 Wildlife Information Response To: Erin Priest - DNR<erin.�riest o state.co.us> Good morning, Pm reaching out in regard to the Cogburn Sand, Gravel, and Reservoir Project new DRMS permit application (M2025-016) that CPW had commented on earlier this year. We had received a response to our first review letter, and the applicant provided an updated wildlife exhibit, attempting to address those comments, which Pve attached to this email. I'm not too sure if they have adequately addressed that initial letter, especially in regard to the eagle nests. When you can, can you please review this exhibit and let me know if CPW has any additional comments that I can add to my second review? Please reach out if you have any questions. Thanks, Joel Renfro Environmental Protection Specialist y � � (720) 812-2002 Physical Address: 1313 Sherman Street, Room 215, Denver, CO 80203 Address for FedEx, UPS, or hand delivery: 1001 E 62nd Ave, Denver, CO 80216 Joel.RenfroCstate.co.us � https://drms.colorado.gov Erin Priest District Wildlife Manager- Fort Lupton C: 970-939-1214 4207 W. CR 16E Loveland, CO 80537 ,� . � �'�� OUTSIDE - � . erin.priestC�state.co.us � c�w.state.co.us uuu .iu � � , �, !, December 8, 2025 Raptor Materials LLC Acord St Vrain Valley Ranch LLC 7541 WCR 26 3/a Longmont, Colorado 80504 Neighbor, Raptor Materials LLC has applied for a mining permit, and you are a structure owner within 200'of the mine. Enclosed you will find a public notice, a structures agreement and a map of the premises to be mined. If you have any questions do not hesitate to reach out to myself or Garrett Varra at 303-666-6657. Thankyou �� ` Robert Haun VP of Operations Raptor Materials LLC k € PUBLIC NOTICE Raptor Materials LLC;8120 Gage Street,Frederick,CO 80516,has filed an application for a Regular(112) Construction Materials Operation Reclamation Permit with the Colorado Mined Land Reclamation Board under provisions of the Colorado Land Reclamation Act for the Extraction of Construction Materials�'i'he proposed mine is known as the Cogburn Sand,Gravel and Reservoir Project,and is located at or near Section 29,Township 3 North,Range 67 West,Prime Meridian�The proposed date of commencement is March 2026, and the proposed date of completion is March 2037�The proposed future use of the land is Developed Water Resources�Additional information and tentative decision date may be obtained from the Division of Reclamation,Mining,and Safety, 1313 Sherman Street,Room 215,Denver,Colorado 80203,(303)866-3567, or at the Weld County Clerk to the Board of County Commissioner's office;1150 0 Street Greeley,CO 80631, or the above-named applicant� � �' Structure A�reement This letter has been provided to you as the owner of a structure on or within two hundred(200) feet of a proposed mine site. The State of Colorado,Division of Reclamation, Mining and Safety ("Division")requires that where a mining operation will adversely affect the stability of any significant, valuable and permanent man-made structure located within two hundred(200) feet of the affected land, the Applicant shall either: a) Provide a notarized agreement between the Applicant and the Person(s)having an interest in the structure,that the Applicant is to provide compensation foz•any damage to the stiucture; or b) Where such an agreement cannot be reached,the Applicant shall provide an appropriate _ engineering evaluation that demonstrates that such structure shali not be damaged by activities - occurring at the mining operation; or c) Where such structure is a utility, the Applicant may supply a notarized letter, on utility letterhead, from the owner•(s) of the utility that the mining and reclamation activities, as proposed,will have "no negative effect" on their utility. ( Co�2str•uction Nlaterials Rule 6.3.12 anc�Rule 6.4.19&Har�d Roclz/Metal Mifaifag Rule 6.312 and Rule 6.4.20) The Colo�•ado Mined Land Reclanzation Board(`Boa��d") I�as deter�nzined that this for�m, if properly execzcted, represents an agreement that coi�zplies witl� Construction Materials Rule 6.3.12(a), Rule 6.4.19(a), and C.R.S. ,�34-32.5-IIS(4)(e) and with Ha��d Rock/Metal Mining Raile 6.3.12(a), Rule 6.4.20(a), ar�d C.R.S. §34-32-115(4)(d). This form is for the sole purpose of ensuring complia�ace with the Rtales and Regaalations and sh�all not niake the Boa�•d or Diviszon a necessafy paj�t��to any pr•ivate civil lawsuit to enforce th�e tern�s of the agreemen�t or create c�ny enforcernerat obligatiojzs in the Board of•the Division. The following structures are located on or within 200 feet of the proposed affected area: 1 Fences/Unpaved Roads 2 Ditch Laterais/ittagation Diich . 3 Diversion Siracture 4 Fartn Field 5 Culvert Pipe (Please list additional structas��es o�� a sepa�°ate page) CERTIFICATION The Applicant, Raptor Materials LLC (print applicant/company name), by Robert Haun (print representative's naine), as Vice President of Operations �p17nt representative's title), does hereby certify that Accord St Vrain Valley Ranch LLC�sttucture owner) shall be compensated for any damage fi•om the proposed mining operation to the above listed stiuct�ire(s) located on or within 200 feet of the proposed affected area described within Exhibit A, of the Reclamation Permit Application for Cogburn Sand, Gravel and Reservoir Project (operation name), File Number M-2025_016 , This for��fa laas bee�i app►•ove�by tlze Colo►�ado Mi�aetl Land RecJa�ratction Bo�cf�d pas��sua�it to its ui�thor•it��u�zr�ey�the Colorado Lu�ad Recluf�iutioiz Act for tlze Extr�actioit of Co�istf�uctiofz Matef�ials and tlae Colot•ado Mined Land Reclufr:utiorr Act fof�Har�d Roclr,Metal, u�itl Desig�zuted Mi�ii�ag Oper�utio�as. Afzy ulter[I11011 Ol'11tOCIlfCllt[OIZ t0 1I11S,fOl�rra shall f�esttlt in voidi�tg tltis for)11. ; NOTARY FOR PERMIT APPLICANT ACKNOWLEGED BY: �� Applicant Raptor Materials LLC Representative Name Robert Haun Date 12/10/2025 Title Vice President of Operations STATE OF Colorado � ) ss. COUNTY OF Weld ) The foregoing was acicnowledged before me this �O� day of i�C2,i►.�e-r , 20 ZS, by Q-o1oc�� G,4.v. asV;u��cs,dc+��oFppcyc.#Lr,�.sof (Zu,�-O� fV1a.-k-r� al.s L��- My Commission Expires: � (�� 2 � N y Public -� JESSICA H00VER NOTARY PUBLIC STATE 0F C0L0RAD0 N0TARY ID 20044035571 MY C0MMISSI0N EXPIRES 0CT0BER 08,2028 NOTARY FOR STRUCTURE OWNER ACKNOWLEGED BY: Sttucture Owner Name Date Title STATE OF ) ) ss. 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' ' ,i._�,��• December 8,2025 Raptor Materials LLC Toni Newville Kerr—McGee Oil&Gas Onshore,LLC 501 N Division Bivd Platteville,Colorado 80651 Dear Toni, Raptor Materials LLC has applied for a mining permit,and you are a structure owner within 200'of the mine. Enclosed you will find a public notice,a structures agreement and a map of the premises to be mined.If you have any questions do not hesitate to reach out to myself or Garrett Varra at 303-666-6657. Thank ou ' � ,/l � Robert Haun VP of Operations Raptor Materials LLC f PUBLIC NOTICE Raptor Materials LLC;8120 Gage Street�Frederick�CO 80516�has filed an application for a Regular(112) Construction Materials Operation Reclamation Permit with the Colorado Mined Land Reclamation Board under provisions of the Colorado Land Reclamation Act for the Extraction of Construction Materials.The proposed mine is known as the Cogburn Sand�Gravel and Reservoir Project�and is located at or near Section 2901"ownship 3 North�Range 67 West�Prime Meridian.The proposed date of commencement is March 2026� and the proposed date of compietion is March 2037.The proposed future use of the land is Developed Water Resources.Additional information and tentative decision date may be obtained from the Division of Reclamation�Mining�and SafetyCl1313 Sherman Street�Room 215�Denver�Colorado 80203�(303)866-3567� or at the Weld County Clerk to the Board of County Commissioner's office;1150 0 Street GreeleyClCO 806310 or the above-named applicant. � Structure A�reement This letter has been provided to you as the owner of a stiucture on or within two hundred(200) feet of a proposed mine site. The State of Colorado,Division of Reclamation, Mining and Safety ("Division")requires that where a mining operation will adversely affect the stability of any significant, valuable and perinanent man-made structure located within two hundred(200) feet of the affected land, the Applicant shall either: a) Provide a notarized agreement between the Applicant and the Person(s)having an interest in the structure,that the Applicant is to provide compensation for any damage to the sti-ucture; or b) Where such an agreement cannot be reached, the Applicant shall provide an appropriate engineering evaluation that demonstrates that such stiucture shall not be damaged by activities occurring at the mining operation; or � � c) Where such sti•ucture is a utility, the Applicant may supply a notarized letter, on utility letterhead, from the owner(s) of the utility that the mining and reclamation activities, as proposed,will have "no negative effect" on their utility. ( Const�acction Matel�ials Rule 6.3.12 a�2d Rule 6.4.19&Har•d Rock/Metal Mirzing Rule 6.3.12 and Rule 6.4.20) The Colo��ado Minecl Land Reclamation.Boczf°d(`Boaf��d") has determined tlzat this for•na, if properly executed-, rept�esents an ag��eemefzt that co��plies wit7�� Co��struction Materials Rule 6.3.12(a), Rule 6.4.19(a), and C.R.S. �34-32.5-11 S(4)(e) and wzth Ha�°d Rock/Metal Mzning Rzrle 6.3.12(a), Rule 6.4.20(a), and C.R.S. �34-32-11 S(4)(d). This form is for�the sole purpose of ensu��ing con�pliaface with the Rules and Regi�lations and shall not malze the Boar•d or•Division. a necessary par�t��to any pr°ivate civil lawsuit to enfo��ce the tern�s of the agr•eem�en�t or•cr•eate any eiaforcenzent obligations in the Board or•the Division. The following structures are located on or within 200 feet of the proposed affected area: 1. 2. Oil and Gas Facilities 3. 4. 5. (Please list additional stt•ucticres on a separ•ate page) CERTIFICATION The Applicant, Raptor Materials LLC (print applicant/company name), by Robert Haun (print representative's name), as Vice President of Operations �print representative's title), does hereby certlfy that Kerr-McGee Oil and Gas Onshore LLC�structure owner� shall be compensated for any damage fi•om the proposed mining operation to the aUove listed sttucture(s) located on or within 200 feet of the proposed affected area described within Exhibit A, of the Reclamation Pennit Application for Cogburn Sand, Gravel and Reservoir Project (operation name), File Number M-2025_016 . Tliis fof�n: hus been appr�oved by tlae Coloi�ado Mi�aed Lund Reclu�fiatioii Bouf�d piff�suu�it to its aiatlaority un�der the Colof�ado Lair�t Reclaf�iation Act for tlie Ext��actio�r of Cotast�•uctiofa Mates�ials trfad tlte Color�ur�o Mi�ted Lu�z�l Reclumutio�r Act fo�•Huf•d Roclr,Metal, a�i�Designated Mirii�ag Operutiotas. Any altet•�ition� o��rraodificatio�i to this foi�s�i shall result in voidin�g t12is fof�ffi. NOTARY FOR PERMIT APPLICANT ACKNOWLEGED BY: �y" / Applicant Raptor Materials LLC Representative Naine Robert Haun Date 12/10/2025 Title Vice President of Operations STATE OF Colorado � ) ss. COLTNTY OF Weld ) The foregoin was acicnowledged before me this ��day of�CeYhL,u/ , 20 25, by R.o1oGYk ��0.� as Vicc Pris�d c.►.{�(ap2ra�ia►^s of �„p{�r �'y��.-{�r�4�S l.l.-� " My Commission Expires: ��I�S N t ry Public JESSICA HOOVER N0TAFiY PUBLIC STATE 0F C0L0RAD0 N0TARY ID 2004403,5571 MY CO�MiA13SI0N EXPIRES OCTOBER 0B,2028 � NOTARY FOR STRUCTURE OWNER ACKNOWLEGED BY: Structure Owner Name Date Title STATE OF ) ) ss. COUNTY OF ) The foregoing was acicnowledged before me this day of , 20 ,by as of My Commission Expu•es: Notaiy Public �' : ; {; b �FiFeS� �� E � � ! 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(.;G1fI��,.Hllt7. f�RE�`1TY4' �Y'OUR MAIL F+IUC� PNC4?A��L=:�� i,-,n �_�p f�;� rl;�k �t f��tt�_,s:%,�i rifo�=,n�:i�lc1t:11 i ver�y.u:�r�s.co�n A,I 1 °,��i a� f i r-,�al on st�;i��p�� ;:ar��I k�u�:s�Cagt. R�f un�:i� for� �u.,r�nr�t e��l :��r�i i ce.�=, unl y. ?har�k vt�ia -Fo�� v��.ir�� bi_i�i rie=_�s. Custom�r 5r.i��;�i ce 1-��OU�-ASK-U`;F�S (1-�si_1G-�75-S 177) A�ei��C: �Jo I"ii�t f�i�avH �I is' U�i�h Ci ui 1�11 1ilf�if'I11i9L1��Il O�t�lt� 1"�`Ict�i W��lc?� 1 pl��0'�/14�;:r� _;!1 � U;�sPS.corn. 1�11 us �k'��.�ut yc�i.u' t h!°�e�,i e.r�re. li0 1i7: �1��{:>'3:l��0�5tra��:i({.)HI'1FfICe.C:ullli��i)� ;��, .��n �1��i s cuzle wi�tl�i yo�.ir� raebi 1�a ��l��,r r r.�_, �� u�,.y�� ; �-,. _ � � � :,, � .��,i:� ;f -�;� ..,�� ,_. December 8,2025 Raptor Materials LLC Mr.Joseph Riemer Occidental Petroleum 1099 18'"St, Denver,Colorado 80202 Dear Mr.Riemer, Raptor Materials LLC has applied for a mining permit,and you are a structure owner within 200'of the mine. Enclosed you will find a public notice,a structures agreement and a map of the premises to be mined.If you have any questions do not hesitate to reach out to myself or Garrett Varra at 303-666-6657. Thank y u Robert Haun VP of Operations Raptor Materials LLC � i � PUBLIC NOTICE Raptor Materials LLC;8120 Gage Street0Frederick�CO 80516�has filed an application for a Regular(112) Construction Materials Operation Reclamation Permit with the Colorado Mined Land Reclamation Board under provisions of the Colorado Land Reclamation Act for the Extraction of Construction Materials.The proposed mine is known as the Cogburn Sand�Gravel and Reservoir Project�and is located at or near Section 29�Township 3 North�Range 67 West�Prime Meridian.The proposed date of commencement is March 2026� and the proposed date of completion is March 2037.The proposed future use of the land is Developed Water Resources.Additional information and tentative decision date may be obtained from the Division of Reclamation�Mining�and Safety01313 Sherman Street�Room 2150Denver�Colorado 80203�(303)866-3567� or at the Weld County Clerk to the Board of County Commissioner's office;1150 0 Street Greeley[]CO 806310 or the above-named applicant. ;: c_ � Structure A�;reement This letter has been provided to you as the owner of a structure on or within two hundred (200) feet of a proposed mine site. The State of Colorado,Division of Reclamation, Mining and Safety ("Division")requires that where a mining operation will adversely affect the stability of any significant, valuable and permanent man-made structure located within two hundred(200) feet of the affected land, the Applicant shall either: a) Provide a notarized agreement between the Applicant and the Person(s)having an interest in the structure, that the Applicant is to provide compensation for any damage to the structure; or b) Where such an agreement cannot be reached, the Applicant shall provide an appropriate engineering evaluation that demonstrates that such structure shall not be damaged by activities occurring at the mining operation; or �� ; c) Where such structure is a utility, the Applicant may supply a notarized letter, on utility letterhead, � � from the owner(s) of the utility that the mining and reclamation activities, as proposed,will have "no negative effect" on their utility. ( Const��ziction t1�Iaterials Ratle 6.3.12 ancl Rule 6.4.19&Hard Rock/Metal Minirag Rule 6.3.12 cznd Rule 6.4.20) The Colo�•ado Mi��ed Land Reclamatio�s.Board("Boa��d') has determined thczt this for°m, if proper•ly execatted, rep��esefzts a�z agr•eement that co�npZies witli Constr�uction Materials Rule 6.3.12(a), �; Rule 6.4.19(a), and C.R.S. ,�34-32.5-115(4)(e) and with Har•d Roc1�/Metal Mining Rule 6.3.12(a), Rtale � 4S 6.4.20(a), alad C.R.S. �34-32-115(4)(d). This form is for the sole purpose of ensuring co�nplicz�ace u�itla the Ra�les and Regialations and sjaall not nzalze the Board of°Dzviszon.a��.ecessary party to any pr°ivate civil lawsuit to enfor-ce th�e terms of the cagreement or•create any enforce�nent obligations in the Boaf�d or the Division. � The following structures are located on or within 200 feet of the proposed affected area: 1. Water Wells 2. 3. 4. 5. (Please list additional st��uctzn�es on a separ•ate page) CERTIFICATION The Applicant, Raptor Materials LLC (print applicant/company name), by Robert Haun (print representative's name), as Vice President of Operations �pt-int representative's title), does hereby certify that OCCidental PetrOleum (structure owner) shall be compensated for any damage fi•om the proposed mining operation to the above listed stiucture(s) located on or within 200 feet of the proposed affected area described within Exhibit A, of the Reclamation Pei7nit Application for Cogburn Sand, Gravel and Reservoir Project (operation name), File Number M-2025_016 Tlzis forna laas beeti appt�oved by the Colof•udo Misaed Lui:d Recluf�eatio�r Bourd pasf�sriufit to its at�thority acndef�tlze Colorado Lrand Recluvtution Act foi•the Extraction of Co�zst�•uctiofa Matef�iuls u�ad tlae Color�ado Min�ed La�id Reclanirition Act fo�Ha►•d Roclz,Metral, afi�Designated Mini�ag Oper�atio�as. Afay alteratioti� ot•f�aodifzc�itio�i� to this fo��t shall f•eszrlt ir1� voiding tli�is fof��fa. NOTARY FOR PERMIT APPLICANT � ACKNOWLEGED BY: Applicant Raptor Materials LLC Representative Name Robert Haun Date 12/10/2025 Title Vice President of Operations STATE OF Colorado � ) ss. COUNTY OF Weld ) The foregoing was aclulowledged before me this �V�day of j,�,�Ger+��2 v' , 20'ZS, by GZc�bC�/k 1-�0.�v� as v►<.t P��s;di►.t o�vp�-+'��,s of (��,,�pt�or �-t<�'-� 2l S ��L, My Coinmission Expu•es: 1 aI ��2� N "t ublic JESStCA HOpyER N0TARY PUBUC STATE 0F C0L0RAD0 N0TARY ID 20044035571 MY COMMISSION EXPIRES OCTOBEFi 08,2pZg NOTARY FOR STRUCTURE OWNER ACKNOWLEGED BY: Structure Owner Name Date Title STATE OF ) ) ss. COUNTY OF ) The foregoing was acicnowledged before me this day of , 20 , by as of My Commission Expires: Notaiy Public •Ft�1pF �� d � _ ��F FF! � § � F o00 $99699 �0 � k S�g <<< 3 � ss�> _-_ �° o� ° �, ==3�_ {===e�a�,33�I3��pp5a ��S��l�3Ei��EE� ;,'"tEt€:e:� F� = �u'�—E 8 �<o F� ; 8$$6�sSi�S"s"s°s"ses� � ¢36owga ox N 3 a¢� a ;Bg BBEEB89 c9e89889 m �� u�u��5 0"�.'u�u o 3 a n � 3��'� n aa u u°3 3 3 3� S 0��e e 9 �e e 9 e e e e e � a e� � !' , ; � � � � � � � , p � mo�ao�m . � ��z�a��: =��s�s� ; � , �, �, �; � I i I I I � � j � 61 �I � q asas��a ee aaaa 3O li` ;;s;; ��r3 � I I " ' . � � F 1 ,:8�6e . - � � � � � � , �� ggSe@B@��C��a ,{. , , J � i I I I � ! ; uj y GP4FPE: 5fr,§46�' - zi r s s;; aaaa �� 9 �§a9�e6§ea��aa� � f�zi E i � § g5 �S� i� :,�; �=:;�.:c:-'_��. �@e e p 8 !� ;::i;= � � y 3 17 S Zs" �a ��i � 3:*°e:�l e e e a�� p 4�3 a s a a�e�a b �� @p� � 3 � �-�Q f g ��i�8g� ��;�;:I<<..aaa:El₹ � �e€eEtt-t?e�geef - �E° � 9 r��e a 3 @s��°� " c` ' � � S 2 � E'. ¢ F ` 6 �33 ��3 i. ¢AA�EA;y � � 1 '3 ' �� 9 � �➢93 ��.�=�� rr�� a�p � �s o � �t � �' �� (�S �� ,� � � =3��`� �i��€��3 ��i�&a�� d g E ° �P�p�I� aaaa3a9. ��S��ae & o �� ° re� � �sl �� S� E�� E E 33"s..' �@ ��o � . : E7a�@�t � 's' C�t 4t•�'2` ge:e��i°a __.�@�.2.€€�€;€�i: ��' @, � �F'e � y�Q�€�.;a gae�a�a :��Ea!!3 3gf an �� ` �� ' � �g .a 'g�� Q�� a de a �� €�� ey�� . ��333i � e . �� ;� �� 3 �i 8d� ' �� a° � � �$ a E'Q s e e = - W = o . 1 � '� - . ... . . . .... . ...:.:..eF:::�,_� _ ��i��ll�� !� — : �a� 9$� _ - - .�� w��:�� _� � '� � �_ z,,, � i� � �' �.,�__--�=_ , i i — `�`�z �� ti� � — �� I �� i�. x , �� s � ti. ,�'` `�y � 'Y�'� '�� '� � ' � �f Q� � ! � � � '� � � � , �•n � � , � � � � ee�� ' ' �3�i ,�� > '� � r�� o i = � � `�.�t - 4�r � �'i� a �, � . 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F�REVII VJ YOliFt hl{lIL ;tl'JD PNCKNGL; :i1.�fl �lp f�',I' f`f;�� T, f�iCtF:i<,:i:%�i ni�ot�+nc:i�ci�::l i ver�y.�is�.,s,�;o�ti l�,� � 5ri I L�S f I f'ici� t)fl S l"c31?1�J`� ;:ii1C� F7q'�1:l�Jc3. �H��LIII(:�� fOr' JUHI c31"I�IBNI� S�E:�"S�iC�3S Ull�)i, T I�i�.�r�k y��a *,'ur yr�ur I��i_is i ness. Cus�Cr,mer�� SF:�r�vire 1-r>rio-R51{-U�,F'�S l 1-�si.10—�i J-�'!7�) R��ri�i�. i:lii I"h,l I�iu'de a�I"Iy ci�i�li t7Ufl-�l 1 i I�"uf Illdl:l 1�!1 C�t��l( ' 1��iUl i v�+�1c�L 1 �)!�C��){i)='�_� �i!i � I):'i�,�i.C Olil. 1a�11 �� ak��l�t Lic)�� M;�,er I��ic�:F. �lU -�i7; �ltf{)�:i��10.��cl�r �'ilt,l'�INfI -a r-�ivulC�;,.� � � - .,t��,�;> �i �:� �, . ,. December 8,2025 Raptor Materials LLC Pasquale Varra 4704 Harlan Street,Suite 250 Denver,CO 80212 Neighbor, Raptor Materials LLC has applied for a mining permit,and you are a structure owner within 200'of the mine. Enclosed you will find a public notice,a structures agreement and a map of the premises to be mined.If you have any questions do not hesitate to reach out to myself or Garrett Varra at 303-666-6657. Thank y � Robert Haun VP of Operations Raptor Materials LLC � � PUBLIC NOTICE Raptor Materials LLC;8120 Gage Street�Frederick�CO 80516�has filed an application for a Regular(112) Construction Materials Operation Reclamation Permit with the Colorado Mined Land Reclamation Board under provisions of the Colorado Land Reclamation Act for the Extraction of Construction Materials.The proposed mine is known as the Cogburn Sand�Gravel and Reservoir Project�and is located at or near Section 29QTownship 3 North�Range 67 West�Prime Meridian.The proposed date of commencement is March 2026� and the proposed date of completion is March 2037.The proposed future use of the land is Developed Water Resources.Additional information and tentative decision date may be obtained from the Division of Rec►amation�Mining�and Safety�1313 Sherman Street�Room 215�Denver�Colorado 802030(303)866-3567� or at the Weld County Clerk to the Board of County Commissioner's office; 1150 0 Street Greeley[lCO 806310 or the above-named applicant. � ¥; � Structure A�reement This letter has been provided to you as the owner of a structure on or within two hundred(200) feet of a proposed mine site. The State of Colorado,Division of Reclamation,Mining and Safery ("Division") requires that where a mining operation will adversely affect the stability of any significant, valuable and perinanent man-made structure located within two hundred (200) feet of the affected land, the Applicant shall either: a) Provide a notarized agreement between the Applicant and the Person(s)having an interest in the structure,that the Applicant is to provide coinpensation for any damage to the stiucture; or b) Where such an agz•eement cannot be reached,the Applicant shall provide an appropriate � engineering evaluation that demonstrates that such structure shall not be damaged by activities occur•ring at the mining operation; or c) Where such structure is a utility, the Applicant may supply a notarized letter, on utility letterhead, from the owner(s) of the utility that the mining and reclamation activities, as proposed,will have "no negative effect" on their utility. ( Constr•uctioi2 Mate��ials Rule 6.3.12 and Rule 6.4.19 &Har•d Rocli/Metal Mining Rule 6.3.12 and Rule 6.4.20) The Color•ado Mified Lafzd Recla�n�atzon BoaNd("Boa�•d') has determined that this for�n, if proper•ly executed, rep�ese�zts afa agr�ee�ne�zt that complies with� Co�2str�uctioii Materials Rule 6.3.12(a), R�t�le 6.4.19(a), af�d C.R.S. �34-32.5-11 S(4)(e) and with Ha�°d Roc7z/Metczl Minin�g Ri�le 6.3.12(a), Rule 6.4.20(a), and C.R.S. �34-32-115(4)(d). This foYm is for the sole pitrpose of ensi�ring compliaiace u�ith. the Rules and Regttlatiofzs and sh�all not m�uke tlze Board or Division a necessary party to any przvate civil lawszait to efzfo�-ce the tern�s o,f th�e agr•eement or cr•eate a�ay e�aforcei�zefat obligations in the Board of�the Division. The following structures are located on or within 200 feet of the proposed affected area: 1. Fences 2. 3• Mining /Excavation Pit 4. Unpaved Roads 5. (Please list additional st�•uctu��es on a separ�ate page) CERTIFICATION The Applicant, Raptor Materials LLC (print applicant/company name), by Robert Haun (prult representative's narne), as Vice President of Operations �print representative's title), does hereby certify that PaSquale Varl'a (structure owner) shall be compensated for•any damage from the proposed mining operation to the above listed structure(s) located on or within 200 feet of the proposed affected area described within Exhibit A, of the Reclamation Pei7nit Application for Cogburn Sand, Gravel and Reservoir Project (operation name), File Number M-2025_016 , Tliis fof•tia laas beeii app��oved by tlae Colo►•ado Mitaed Lafid Reclanir�tio�a Board pa�r�satafat to its aactlaority itndef�the Colorudo Lra�ad Recluf�zutio�t Act fos�tlae Extf�uctio�a of Co�astr�irction Muteriuls afzd the Coloy�arlo Mi�ied Lanrl Reclu�r:ation Act for•Har�d Roc1i,Mett�l, afid Desig�aated Mi�ai�ig Operatiofas. Any altey�atio�a ot�j�totlificatio�i to this for�ta shall result ira voidr�tg tla.is fortjt. ; NOTARY FOR PERMIT APPLICANT ACKNOWLEGED BY: Applicant Raptor Materials LLC Representative Naine Robert Haun Date 12/10/2025 Title Vice President of Operations STATE OF Colorado � ) ss. COUNTY OF Weld ) The foregoing was acknowledged before me this �O�day of�t GLVv��tN , 20 Z5, by �b�e��{, {-{aw►� asViCe Pres�u�oF ope,tr�t,��f (Zap�r 11n��-e-r � Ql S LLL. �� My Commission Expires: J�I g � 2�S -� ry Public JESSICA H00VER NOTARY PUBLIC STATE 0F C0L0RAD0 N0TARY ID 20044p35571 MY COMMISSION EXPIRES OCTOBEH 08,202g NOTARY FOR STRUCTURE OWNER ACKNOWLEGED BY: Structure Owner Name Date Title STATE OF ) ) ss. 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P125 Quarterly Groundwater Quality Monitoring Results 10/31/2024 11/16/2024 1/17/2025 5/29/2025 8/26/2025 Parameter* Analytical Method Units WQ Standard- Reg 41 MW-2 MW-3 MW-3 Dup MW-2 MW-2 Dup MW-3 MW-3 Dup MW-2 MW-3 MW-3 Dup MW-2 MW-2 Dup MW-3 Dissolved Arsenic EPA 200.8 ug/L 10 ND ND ND ND ND ND ND ND ND ND ND ND ND Boron EPA 200.7 ug/L 750 236 219 222 284 285 ND 294 211 188 189 248 236 223 Cadmium EPA 200.8 ug/L 5 ND ND ND ND ND ND ND ND ND ND ND ND ND Chromium EPA 200.8 ug/L 100 ND ND ND ND ND ND ND ND ND ND ND ND ND Copper EPA 200.8 ug/L 200 ND ND ND ND ND ND ND ND ND ND ND ND ND Lead EPA 200.8 ug/L 50 ND ND ND ND ND ND ND ND ND ND ND ND ND Manganese EPA 200.8 ug/L 50 ND 85 82 5 ND 100 101 ND 81 87 ND ND 107 Mercury EPA 200.8 ug/L 2 ND 0.00641 ND ND ND ND ND ND ND ND ND ND ND Nickel EPA 200.8 ug/L 100 ND ND ND ND ND ND ND ND ND ND ND ND ND Selenium EPA 200.8 ug/L 20 ND ND ND ND ND ND ND ND ND ND ND 5 ND Uranium EPA 200.8 ug/L 30 25 14 14 24 24 22 22 ND 13 13 22 22 13 Zinc EPA 200.8 mg/L 2 ND ND ND 0.007 0.003 0.004 0.005 ND ND ND ND ND ND Nitrate EPA 300 mg/L 10 3.27 0.336 0.479 3.54 3.43 0.662 0.14 3.22 ND 0.193 3.57 3.57 ND Nitrite EPA 300 mg/L 1 ND ND ND ND ND ND ND ND ND ND ND ND 0.088 Nitrate+ Nitrite as N EPA 300 mg/L 10 3.27 0.336 0.479 3.54 3.43 0.662 0.14 3.22 ND 0.193 3.57 3.57 0.088 Sulfate EPA 300 mg/L 250 335 317 321 324 321 336 331 320 296 296 328 326 291 Gross Alpha Particle EPA 900 pCi/L 15 11.8 - - 14 17.4 10.8 12.3 9.66 6.75 6.6 9.35 11.8 7.64 Total Dissolved Solids EPA 160.1 mg/L 400 978 776 774 700 774 702 826 654 644 640 904 864 750 Note: ND- Not detected at the reporting limit or method detection limit "-": Standard not provided or analyte not tested *Analytes from Appendix B of the Sampling and Analysis Plan Guidance (DRMS, 2024) not listed were non-detect for all sampling events P125 Quarterly Groundwater Quality Monitoring Results- Field Parameters 10/31/2024 11/16/2024 1/17/2025 5/29/2025 8/26/2025 Parameter Units MW-2 MW-3 MW-2 MW-3 MW-2 MW-3 MW-2 MW-3 Time- Field Parameter - 9:59 10:28 12:46 9:30 9:00 11:30 11:48 Measurement Temperature deg C - 14.3 7.2 7.8 15 16.9 17 15.1 pH - - 7.78 7.26 7.36 7.22 7.22 7.63 8.1 Conductivity uS/cm - 1359 1215 1180 1096 1003 1810 1510 Purge Duration min - 14 11 10 5 5 5 7 Purge Volume gal - - 3 3 3 3 3 3 Time-Sample Collection - 9:59 10:34 12:46 9:30 9:00 11:35 11:55 Note: "-" indicates parameter or measurement was not collected or recorded AMERICAN WATER ENGINEERING SERVICE5, LLC MINING AND WATER STORAGE ANALYSIS RAPTOR PIT 125 AWES PROJECT #RM-125-01 DECEMBER 2025 ,;' � � �� r ..�. w.�'�`�, E��'fi b .��.� ,-�,.! �w_�a: c � ,� eh . �. *�� =` — ——�i � > �� r •�� , �• +,4 r • s I �. r L�'a �,�y4 f�tl�. — � . .� �'� T ;�' ��. 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Frederick, CO 80516 Fort Collins, CO 80524 �,�w�� 48�J Four Star Court, Fort Collins, CO 8f�524 Introduction The following report presents the results of a updated hydrogeologic evaluation regarding a proposed gravel quarry operation operated by Raptor Materials, LLC (Raptor) near Platteville, Colorado. Mining and reclamation will consist of sand and gravel extraction followed by lining the pits using shale bedrock as the lining material. Raptor identifies the mine as its Pit 125 Operation. This evaluation consisted of reviewing available hydrogeologic data and inputting those data into a numerical groundwater flow model. The model was then used to estimate the effects of dry mining and water storage on the surrounding groundwater hydrology. The site location and mine boundary area are depicted on Figure 1. Back�round Information The proposed gravel quarry is located in portions of section 29, Township 3 North, Range 67 West of the 6t" principal meridian. The surrounding land use consists of agricultural, rural residential and natural gas and oil gathering operations. The proposed mine occupies an estimated 196.4 acres.The water table at the site is located in unconsolidated alluvial deposits with the depth to water varying between 7 and 28 feet below ground surFace. Soil conditions generally consist of varying thicknesses of top soil underlain by sand and gravel deposits, which in turn are underlain by shale, claystone and sandstone bedrock. Over the entire model area the average saturated thickness of the sand and gravel deposits (prior to mining) is estimated at about 29 feet. It is our understanding that the sand and gravel will be dewatered during aggregate extraction. The mine permit application identifies two tracts for sand and gravel extraction (P-125A and P-125B) which are depicted on Figure 2. This analysis was predictive for the dry mining (dewatering) and lining of two pits and using the pits as surface water storage subsequent to aggregate extraction. Garrett Varra of Raptor has indicated that mining will progress from south to north and model simulations were ran accordingly. A third cell (P-125C) will be mined at a later date under a technical revision to the initial permit application and was not included in the presented simulations. It is the author's opinion that model updates that include water level data collected during mining and reclamation will provide vastly superior model predictions. The hydraulic conductivity of alluvial deposits can vary greatly; however, for this study a value of 200 feet per day was used for gravely sand. The average effective porosity of the local sand and gravel deposits is estimated at 0.27. The natural hydraulic gradient as documented by past water resource investigation reports is on the order of 0.002 feet per foot for the majority of the study Mining and Water Storage Analysis Raptor Pit 125 Weld County,Colorado Page 2 area east of the Saint Vrain River. Based on USGS studies the depth to groundwater has been measured at less than two feet to greater than 30 feet across the study area. Seasonal water table fluctuations between one and three feet are common for this area; however, fluctuations of greater than ten feet have been documented during drought conditions (Schneider, 1983). Proiect Assumptions The following are assumptions made in these analyses: • The aquifer within the model boundaryis heterogeneous and anisotropic; • The average saturated thickness of the aquifer within the mine boundary is 29 feet; • The average horizontal hydraulic conductivity(K) of the sand and gravel deposits is 200 feet per day and the vertical K value is 20 feet per day; • The hydraulic conductivity of unlined ditch beds was assigned a value of 0.4 feet per day and the Saint Vrain Creek bed was assigned a value of 4 feet per day; • The hydraulic conductivity of the lake bed bottom is 0.0001 feet per day; • The hydraulic conductivity of the lake sidewalls is 0.03 feet per day; • All groundwater solutions are steady state; and • The bedrock which underlies the alluvial deposits is an impermeable barrier. Model Parameters The effects of dewatering and pit lining on groundwater flow within the study area were evaluated by using the three dimensional groundwater flow model Visual ModFlow Pro (VMOD). The general parameters used in the model are presented below. Model boundary conditions are depicted in Attachment A and are described below. • The model boundary is 9420 feet(north-south)by 11986 feet(east-west). • The model grid is 180 rows by 240 columns or 43200 cells. • Pits A and B were assigned constant head boundaries for dewatering simulations and lake boundaries for water storage simulations. • River boundaries were assigned for the Last Chance Ditch, Saint Vrain Creek and an unnamed seepage ditch. • General head boundaries were assigned to the model limits (north, south, east and west). Mining and Water Storage Analysis Raptor Pit 125 Weld County,Colorado Page 3 A uniform flow field was defined in the model with an unconfined aquifer. The natural groundwater flow direction varies between southeast(west of Saint Vrain Creek)and northwest (east of Saint Vrain Creek)within the model boundary. Published and measured water level data were used to generate water level contours. Ground surface and bedrock elevations were obtained from site surveys, drill hole data and USGS maps. The ground surface and bedrock elevations were input into the geo-statistical model Surfer°, which created surface and bedrock contour maps. These maps were imported into VMOD to define the ground surface and bedrock elevations within the flow model.The river stage elevations (Saint Vrain Creek and ditches) were estimated from survey data and estimated groundwater elevations. The model was calibrated by adjusting the general head boundary heads and gradients to simulate available groundwater level data. Measured water levels (obtained from Raptor monitoring well data) were compared to the model predicted elevations.The model was adjusted using trial and error methods of reassigning river boundary conductance and general head elevations until the model predicted water table elevations closely matched measured water levels. Once the model was calibrated four model assigned observation wells were placed up, down and cross gradient of tracts A and B. The calculated head values for the model assigned wells were then used as observed levels so that subsequent model simulations would predict changes to groundwater hydrology compared to the calibrated simulation. To simulate dewatering an elevation of 4755 feet was assigned for mine constant head boundaries and 4790 feet was assigned for all lake boundaries. Model generated groundwater contours and calibration graph for the calibration run are presented in Attachment B. Five numerical model simulations were developed to represent a range of hydrogeologic conditions. The first was a calibration scenario that incorporated adjacent mine dewatering operations. The second scenario simulated dewatering of Cell A. The third scenario represented Cell A as a lake while Cell B was dewatered. The fourth scenario considered both Cell A and Cell B as lakes. The final scenario modeled all pits as lined reservoirs. Figure 2 depicts the extraction extents and model boundaries for all simulations. Attachments C through F present model generated contours and calibration graphs for the five model runs summarized on the tables below. Mining and Water Storage Analysis Raptor Pit 125 Weld County,Colorado Page 4 Table 1-Cell A Dewater Calibration Well Calibration Water Level Predicted Water Level Elevation Difference VM-1 4789.38 4787.95 -1.43 VM-2 4782.01 4780.99 -1.02 VM-3 4777.11 4777.10 -0.01 VM-4 4788.21 4785.88 -2.33 Note:All values in feet Table 2-Cell A Lake, Cell 6 Dewater Calibration Well Calibration Water Level Predicted Water Levell Elevation Difference VM-1 4789.38 4784.27 -5.11 VM-2 4782.01 4779.45 -2.56 VM-3 4777.11 4776.70 -0.41 VM-4 4788.21 4785.46 -2.75 Note:All values in feet Table 3-Cell A Lake Cell B Lake Calibration Well Calibration Water Level Predicted Water Levell Elevation Difference VM-1 4789.38 4789.50 0.12 VM-2 4782.01 4781.02 -0.99 VM-3 4777.11 4776.70 -0.41 VM-4 4788.21 4788.36 0.15 Note:All values in feet Mining and Water Storage Analysis Raptor Pit 125 Weld County,Colorado Page 5 Table 4—All Pits Lakes Calibration Well Calibration Water Level Predicted Water Level Elevation Difference VM-1 4789.38 4790.78 1.4 VM-2 4782.01 4781.49 -0.52 VM-3 4777.11 4796.41 19.3 VM--4 4788.21 4795.24 7.03 Note:All values in feet Results A review of Tables 1 through 4, show that the mining of pits and associated dewatering will have minimal influences on the local hydrology for the pits operated by Raptor. Dewatering multiple pits at the maximum predicted drawdown (Cells A & B) would likely create the greatest drawdown should that occur; however, Raptor has indicated only one pit will be dewatered at any given time. It is anticipated that cell closure of one mine cell (Cell A)will occur during the mining and dewatering of the adjacent pit B, which will help mitigate drawdown issues. Post lining head levels immediately up and downgradient of the lined pits are within the range of normal seasonal water table elevation changes. Predicted water level depressions (shadows) varied between - 0.41 and -0.99 feet and predicted mounding was estimated to vary between 0.12 and 0.15 feet for the two lined pits.These values are based on water level changes for the computer generated wells. Table 4 also shows that once all the mines is this area are reclaimed as reservoirs that a substantial water table rebound will occur. Conclusions The modeling results indicate that shadow-mounding effects of lining the mined out pits will not adversely affect the regional groundwater hydrology. From a practical perspective it would be nearly impossible to determine, with any degree of confidence, that water level changes are the result of shadow or mounding verses natural drought, precipitation or irrigation influences. It also should be noted that numerous mines are located adjacent to the proposed pits and may mask mining and reclamation effects. As mining commences Raptor will confirm predicted water level changes to measured values. Any unanticipated conditions will be abated or reported to the Division. Mining and Water Storage Analysis Raptor Pit 125 Weld County,Colorado Page 6 This report was prepared by AWE5, LLC �� Date: 12/19/2025 Joby L.Adams, P.G. Principal/Hydrogeologist REFERENCES Colton, R.B., and Fitch, H.R., 1974, Map showing potential sources of gravel and crushed-rock aggregate in the Boulder-Fort Collins-Greeley area, Front Range Urban Corridor, Colorado: U.S. Geol. Survey Misc. Geol. Inv. Map I-855-D. Schneider, P. A., 1983, Shallow groundwater in the Boulder—Fort Collins—Greeley area, Colorado, 1975-77: U.S. Geological Survey Water Resources Investigation Report 83-4058. FIGURES FIGURE 1-SITE LOCATION MAP I a lV I4UHG SZ� - � / � � 1 0 -__ �I , `� � III Q" l" .. ': ,��. '� � � l2E �� \ / ...�" � f . _ , , ,,,, ,, , �T003RV R067W �-, --- , , j - �� 19 �-,a�oo-'"� 20 /� � - '�/�� . 21 � ; : ,, , , - '; � . � � � � ^ �-�- � �. �, � r" � � ' ): - ._ - i� r � � ' � _ — �" ' „ ` ; , ' o � � 1 \ � -�, � � i � �` � �� Gvwanda . .�, RA�a VIfW��R � � J— � �� , . I I-' ,� i - _ I _�� CO-66 r � �61 i ��' ✓: I'_�, `�6 ;�� _ f .. . . _ _ -- / J 1� J I ' _ ! � . - . �4S5� ' _ " / . � �: / y I. _..I' f.'_ � 3Q /�� I , , ; , 28 � ' % 1 � ,�-- � . - Permit Boundary I Q ', o � f a Aa� � ) � + 1 O 4 tJ 1/J � \ P �'� ., � ,�� I d q i o "` � q _. � / �\ f ° J� � ' � � � �, \ , CO ROAD 28 � �� '��..� r � .. O�Qp026 3!4 � � i_.. � �� ` i ��.� - � � i/ ��q_ � � � '� . -_ - � , _ , ^4t`j�'t ti.,, I � � __ - � ,. --� , � _ ,` 31 32 � I ' �,�_ 33- ._' \'� ILast:Cl�an �� G�[,;, I � � �-- � i I- �-�-- -- J - , �' � � � I� Lu�[c!; o � I �` /� - - - D _- � u \. / v / .. - _'r"_-_ ...Y ___ . � \�, ' I CO ROAD Z6 �,.: --�i ---�--�� , ,.._". _..-_ .._.� �, '-- --- -- -- � � ---- - -- — CO ,. a_ i_ ..�.:'I_. . .. . .,..- _ _I..---- '�. ,�� %� f ��i ' I ----g . Ii �. � . ;� .' . . . .4900� � . °.'�-,: � x . - - I r a . � . .�Q� w _. 50 ' � �- This report includes information from the following map sheet(s). 0 Miles 0.25 0.5 1 1.5 NW N NE TP,Gowanda,2013,7.5-minute SITE NAME: Cogburn Sand&Gravel Project ADDRESS: 13473 17 COUNTY RD Weld County, CO 80504 _� W CLIENT: American Water Engineering Services 1 l� N• SW S SE 5077295 - 4 page 5 � - _ . ' � • �i:' i� a` , c}Ny HlGHWAY 66 �`, t� ` 4 .� , - _ � �� '°°"°� P125 - COGBURN s . . . �.. - . - . � ... ,�y �� . � - � �: , R ,13. �NUKIHtASI (,UKNtK •c � ' ' ' �8 LEGEND WEST SIRTEENiH CORNER v^'� ,. 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NDLUMWIIg CAP�LS 3S60 � „ '��4��`y�. 4cY� �• � - " wm . � � 36" CMP � ACCEPIED EAST QUARIER CORNER • �� l ..r.U� � l.� D,� �a. . SEC7iCN 29, �.3N.. R.67W. �a . t, . . r �,,; Q - '� CALCULATEG POSITION ,� �p C.�� ,. 24" RCP .�y ,.,.��. � a.�4�s �� (CfiULD NC1 ACCE55 DUE TO � eY • Q' • -9. � � , / ('!� !; .� H�GH WATER AND NO PERMISSION � fl �` " ` N � •'.'• � � � FROM NEIGHBORING OWNER � °� ��.�,r,• � 36" CPP ' � p .��. �. � ) . • - / � �.F.IVIATER DIVERSION STRUCTURE �. (J '� `\ ,; �� q o • . � yc„ # IF�:I ��o��•y ge . o� . .. . .-. o• I � � � .w. �a � • o ' . . o . _ . , r F �) �. .. .,.P--a . . .- . . . . . � . .._.. � Y�' O t ' ' � . .�1�2ty } , ... . " p �`� '��I 1��-� G E L �'�' y�� '`q� '�:' �� , „� � � � - � .� .�' °� .�� .. OWNER.. � !F � � � ` 1 . ...� � gfl 'q�, (� . � o'••�.��%. �r. s_ �j dCORDST�R4LV VALLEY24NCHLLC { � �� .�; � $ Ln nY°!7 �-9 d/.57/ y` ' ,� �: •�� .� • � � �\\t��. �. �., o � � O ^ .'n•� �{_. �� "� � �s-� � '�E71'��7�3' 1� � �� :� � �sy'� . ,. � I . ��6. `��t.�s 2 g �. :�. :o � t50 aa�[ h'Ea0 SETBa 'r? �� . g' C RE TE Di H� ;N , �:� "s�'0,1 f�l)sr?.`•) vW-�o coa rr cooE 2s- �o E ?S f'LJCGF &Q �t �,9 � ,�1� . m ON'NER: � � Yb�%[ AO S�b'? �'l 4ARRACOMP.4NlESlNC � _ ...� �sg[O CP�'; COD ' -.-` i ,- -�� - ` � I�_.- i�`,�of<r � ';� , '_ , . . _ 5 Rt ' P DRAI I C � � , ., . . ;�",YCI IC l.�';^ ,� �� .t,P,�Ed ,��.. �� .�. ' _.. �..?t`I'.� T€EL 4 , . ��. E NAGE T.ti '.W � b� �,�. M . _. ,.._ ��" CPP � 9 O ✓ I '� Z C,��1 i.�. G' a 4�� .,p� . � -:: i^,r,. ,: ..i _ { �%�ERMANE TNOR/V � � r 6t�ATE /NE EASEro'1�i �x,.I ,(� `.; rc�� ,c.a nc��?�vr� i i � �. . �� . , o• i�• �� .?f Pc'UCC U ,-::/� kYk'..,4'L/NE€.�Sc�r5/f�7 � I'; � ' .�t�L � � x v?;:c.�x f � 60' RIGHT—OF—WAY PER :A � _� r �,. �uf�T.S—� iL'-�. ROAD FILE 100/134 ' ., �,�-„��.g�;.., , . BOCC RECEPTION No. 18820017 " r.I BOOK 48, PAGE 237 �, . i -:- . �''..\�t. _.. � �. n,•,•.�i .,, ..._ . . .. . �/ � .. . I ^I ._. ..__..__.._ � I TC , .� Ri r : , J.ti' � , E a8' C nF —� m � � ��O� >t; . <,. ;l;,;f � O � � warc / c � . . (�, - ORRVEL�L�1F '; ?$ � �(n C� G� . �.. i ` _ _. .FiE 51 ��. � Z :. . FENCE INTERSECTiON � � —�� .. � �� .: s O -�.« ' .. — _ — — N 52;4g"''— �Asr , rz; � � • � .,_ — IS t0.4 NORTtiEAST ..� � � --� � W 1325.98� . . 18'RCP — '�. . p0 � ADE.�� ' . �� ' 'Y • • •. �. ��, �,o�� . K OF PROPERTv CORNER CEN7E'. SOUTti SIX7EENTti CORNER �� a' SECTi��N 29, 7.3N., R.67W. —10' YNTNE55 CORN�R— � A. Cj _� ''M� FOUN 1 N6 REBAR WITH � FOUND //6 REBAR YJITH �� 3 .;�;;i., / � � — „ � ,.. Z v .. . 2.5" ALUMINUM CAP LS 24307 �� r1� ' . . '. 2.5" ALUMINUM CAP LS 23500 � `�� V I , N FLU.H WITH GRADE �� ... � FLUSH WIT GRA � � �. � _ � � � SOUTHEAST SIXTEENT NER / � G��' ; �� ' • !�. � SECTION 29, T. R,67W. • . � - - w CALCULAT POSITION�� / � I �'��I r � . �, • � R 0 A D I S C O S E D - ESS CORNER- ' �L ' , � �• ' � !• �.•+.'r�'•, _� L � � FOUND /6 REBAR WITH ' � ��.... . ^ ' , .,,'. :��'•• , U��R 2.5� ALUMIN CAP LS 2J500 � •'�� . / � � � • ^. {` '•�� acoxosr i��v v�iccEr irnNcf�ccc -� LOT-I R6 5I7/ •� ., .; s �i' p'•. . FLUSH WITH GRADE � / �� . ♦�, _ *�2;"' �'*, (1n[.�ParU �t : ,� / , / .. .� . � OWh£R.� '• �'"'�9y':� '. • •� � � ;:�9"'*'4'.. O1V.\ER: � COLL7_NSROliFR7ALLL7l t�/ .a� ;'��r.}'.:•.•s , . � :,�fr. :�' �LGEVEX/STINC � � �.��COLL7_NSPAOUh"Pl- ��`. '•,��i: , �. . 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J � �ircCEP7/ANNo. .�„ � � L 0 C A T I 0 N ) 5o P,PE�,�E R,�,;T-�F- r _ — _ _ —__ _ _ _ RECEP/�ON No. J806" 6 � � � �p P/PEL/NE R/GHT-OF- RECEPAQV No. sOBJ7l5 ;,< � � � /� �z T,�t✓ f"'T£��''SE7BACK PER /, � � � 10 C avtv CO�E.2J—J-70%` /� BRiDG . � �� 5 DIR DIT � � �� / OWNER: �� ' � ACORDSTVRAINVALLEPRANCKLLC .- � �� _ 6� �o��rs o�r�a, / �Roo��r�o� Eo��PME�r :, �� 0 VE R L A N D C 0 59 9841 RIGHT QF—WAY � 4'CONCRETE DITCH ROAD FILE 100/134 � I O Z 5 O 5 O O %; i2� ��P �,Cu , ,.�t�7 r ��, � SOUTHEAST CORNER EAST SIXTEENTH CORNER ,��; � . SECTION 29, T.3N., R.67w. �� SECTION 29, T.3N., R.67W. .: � �.;,��;,� ^18 CMP. r FOUND �'6 REBAR WITH �" � � FOUND y6 REBAR WITH � � � s ^ " � � . � � ILLEGBI.E 2.5" ALUMINUM CAP - . . �. _ # � � �' 2.5/ ALUM. 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Residual: -0.003 (ft)at MW-4lMW-4 Standard Error of the Estimate : 0.001 (ft) Min. Residual: 0(ft)at MW-31MW-3 Root Mean Squared : 0.002(ft) Residual Mean :-0.001 (ft) Normalized RMS : 0.018( %) Abs. Residual Mean :0.002{ft) Correlation Coefficient 1 Calibration Run AW'GS, LLC Project: Raptor Yitl2� 970-590-3807 Mc�deller; J Adants ATTACHMENT B MODEL BOUNDARY CONDITIONS n �: � ��y' �.R" . � - �v.„^�.--ewm.a � a,�•a _"'"- �" ri �t �, ,, ,r� j k�� :. �,1.�� atr, a �,- .: '�`��'" . � � � �, � ,F +�a•�� o v . t � . y�� .. . r� ^".�,r'. '+Y" � . ,.�« k t * �".'� m: ' u � ..+ �b. �[ r� �': �. .r �� ' ` .• a� ' �'� t ' � � �� - r� r �, p � ' � �� ,� ,t�. ��u . . �t" t��K � � i�l�� 'y e,�� ir , 3� S,�� . ,�� 4 1,,. ±�t �s a;^ , ��" �m�' � �. . � . y y t. � , r � N �, "v 3 � �?... , v�[� - . �'�,s �� sj � .:# �.� ��' 'kd � 1��j a_ ,.��, .. � i i-,'" .�. � �', �2',�k� F �.� _� ( ��F � F i:� ,��iK�c: _ h � � r,� �+� e � :r 3'` . 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Residual: -2.334(ft)at MW-4/MW-4 Standard E«or of the Estimate : 0 482(ft) Min. Residual:-0.009(ft) at MW-3JMW-3 Root Mean Squared : 1.461 (ft) Residual Mean :-1.199(ft) Normalized RMS : 11.907(%) Abs. Residual Mean : 1.199(ft) Correlation CoeffiCient:0.996 PIL/� DlWBIeC AWGS, LLC Praject; Raptor Pi�l?� �)70-S90-38U7 Modellcr:.l Adams Calculated vs. Observed Head : Steady state ■ Layer#1 95%confidence interval 95%interval ■ � u� 00 VM-4 � Observed=4788.21 Calculated=4785.88 v i � � � � � � 2 t � m � �� U N a� �/M'2 � � `� Observed=4782.01 Calculated=4780.99 � � �� r a ' � VM-3 ObseNed=4777.11 Calculated =4777.10 4776.855 4781.855 4786.855 Observed Head(ft) I i, I Num.of Data Points�4 Max. Residual: -2.334(ft)at MW-4/MW-4 Standard Error of the Estimate : 0.482(ft) Min. Residual: -0.009 (ft)at MW-3lMW-3 Root Mean Squared : 1.461 (ft) Residual Mean :-1.199(ft) Normalized RMS : 11.907(%) Abs. 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':" 'I r.�+�,'r �t'..r t-` "I' __ ._. .. _._ . - C� 2000 9f]00 600D �1nC0 1�10J0 L1986 Pit A Lak� Pit B Dewater r1V4`F,S, I.I,C Praject: Raptc�r !'itl?4 9�[}..59f}_3S67 Mcadcller: J Adan3s Calculated vs. Observed Head : Steady state ■ Layer#1 -- 95%confidence interval — 95% interval I � / ,� , ,� � %, � � ��Nt-4 � Obsenred=4788.21 Calculated=4785.46 v - VM-1 Observed=4789.38 Calculated=4784.27 I f � i � �'' a� � _ � � � � � U U � � f, � � % VM-2 �� Observed=4782.01 Caiculated=4779.45 i v / VM-3 v Observed=4777.11 Calculated=4776.70 � / ~ i ti v 4776.444 4781.444 4786.444 Obsenred Head(ft) Num.of Data Points:4 Max. Residual:-5.108(ft)at MW-1/MW-1 Standard Error of the Estimate : 0.96(ft) Min. Residual:-0.412(ftj at MW-3/MW-3 Root Mean Squared : 3.176(ft) Residual Mean :-2.706(ft) Normalized RMS : 25.88(%) Abs. 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Residual Mean : 7.059(ft) Correlation Coefficient: -0.014 All Pits Reservoirs AVI'CS, LLC IProject: Raptor Pit125 970-590-3807 Mc�deller; J Adams Calculated vs. Observed Head : Steady state ■ Layer#1 95%confidence interval — 95°!o interval � r-- u� cn � I� � VM-4 i Observed=4788.21 Calculated=4795.24 � f;, ■ � a rn 2r �c� `�, �� f m �. {' U ,,� f0 U �� VM-2 Obseroed=4788.21 Calculated=4795.24 ,i c•i R � f ti V : _. .- -- . .. 4786.72 4796.72 Observed Head (ft) I � � I Num. of Data Points:4 Max. Residual: 19.296(ft)at MW-3/MW-3 Standard Error of the Estimate: 4.462(ft) Min. Residual: -0.516(ft)at MW-2/MW-2 Root Mean Squared : 10.295(ft) Residual Mean �6.801 (ft) Normalized RMS: 83.904(%) Abs. Residual Mean :7.059(ft) Correlation Coefficient : -0.014 nll Pits Reservoirs A11'GS, LLC Project: Raptor Pit12? 970-590-3807 Mo�elicr: .i Adams AMERICAN WATER ENGINEERING SERVICES, LLC GROUNDWATER MONITORING PLAN RAPTOR PIT 125 WELD COUNTY, COLORADO AWES PROJECT # 2024-RM-P125 NOVEMBER 2025 .�� .�„�, ' .a � ��; '� � � �y� * 1u� `� . � 'e � t� �g � ,��r '�'�'[� `' r. �::�` � � �I _ —f$'��,�#� �^� a� �� at,++i' a F4� .. ,. -- � � ��',�"`�, � +� , � �ag `� t ,rr�� : -'[• !l�� ` — �� J -�" ..��11��'" ,} 6 �'? ,'� _ � �;�y � �� ' I �s.� � i �� . � '�4 t � i " .. . h�'.�' ., ' ��\ t 'ifaE! - � e-d� .; � . �� ,�' i Ml�=.� � K� ��J �� '� � � .�_ I _ �°� % � �a { y� ~��,� ' _."' G' � � f �� d S � �ky a a .,��. �� tiM� _ : l s f l,�,. s � �, 1 �y< :..w r—�� d►3L � .tvc; �� ,.��; e�I'.'� �• __ 91. �B''�� i �� a �'� �'� � ��' .�" � �, � ,p, .�i �o . � �r,� ' � e �� i' ��,_f'* . � + 'r� , � ..� �' _ , ,;i___�}�� - �� `:'>. �` ,.;G '` • w d �!,'_ � � �. - � �,�y_ .�_��,� � � ,� ,�� ,. ,, � � �� .�� . - � . �� ,�,a� _�� Ip`LL �1 . _ �,_ .�� ,. ,.�r . � �_ � _ _ , , �a,.—_ ,��,�.�; � -�. , �� , ,,,�,. -- �. �' � ;� , �' — '�" � _ � ;� ° �—�'� k-� � � ' � �� ,„,�` �' -.�Y� � x{�. I� �k�w... '�r'` � . .,. - J . � � / �� ~� ..'� �� ~'�I�� .' � I�i r✓ 4 �� .I��. y.. - . �4, f . �� Prepared for: Prepared by: Raptor Materials, LLC. AWES, LLC 8120 Gage Street 4809 Four Star Ct. Frederick, CO 80516 Fort Collins, CO 80524 �j�w�s 48�J Four Star Court, Fort Collins, C� 8��24 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............................................................................................3 3.1 Project Personnel...................................................................................................................... 3 3.2 Subcontractors.......................................................................................................................... 3 4.0 OVERVIEW-QUALITYASSURANCE/QUALITY CONTROL.........................................................................4 5.0 REMARKS.................................................................................................................................................4 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. 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 z AWES, LLC 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. 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 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. 3 AWES, LLC 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. 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 ineasurement 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. Date 11/21/2025 Joby L.Adams, P.G., REM Pri nci pa I/Hyd rogeologist 4 FIGURE 1-SITE LOCATION MAP I a lV I4UHG SZ� - � / � � 1 0 -__ �I , `� � III Q" l" .. ': ,��. '� � � l2E �� \ / ...�" � f . _ , , ,,,, ,, , �T003RV R067W �-, --- , , j - �� 19 �-,a�oo-'"� 20 /� � - '�/�� . 21 � ; : ,, , , - '; � . � � � � ^ �-�- � �. �, � r" � � ' ): - ._ - i� r � � ' � _ — �" ' „ ` ; , ' o � � 1 \ � -�, � � i � �` � �� Gvwanda . .�, RA�a VIfW��R � � J— � �� , . I I-' ,� i - _ I _�� CO-66 r � �61 i ��' ✓: I'_�, `�6 ;�� _ f .. . . _ _ -- / J 1� J I ' _ ! � . - . �4S5� ' _ " / . � �: / y I. _..I' f.'_ � 3Q /�� I , , ; , 28 � ' % 1 � ,�-- � . - Permit Boundary I Q ', o � f a Aa� � ) � + 1 O 4 tJ 1/J � \ P �'� ., � ,�� I d q i o "` � q _. � / �\ f ° J� � ' � � � �, \ , CO ROAD 28 � �� '��..� r � .. 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DIRECTION OF EXTRACTION / �' I / Q' � � '�, �, � I�' � � �1 r�� .=�i �� r � '`"„ , � � 1 T / �.I '� �`" � � � � ' � � / � � � � � ) . � �� !r � �� f J-'�� :t" - ; '�/// //�" 1� �;. \\ ��/ fef��i %� �� f,,�,j�+,/o7f,� — z� � v� s ��-` ./ � � � ` � � � � ��/ '' �� .. , /I�, � �� /l � � �:,� �,� � � •� � - �� _ � '\ � � , � � �%,% , �� , � , � . � �� ;, , � � ��,�� .:�, , ��` � �--� � :� PROPOSED STRUCTURE 8c STORAGE TABLE � � � �o � - �� , �,, , ��,�� j % � -r�`�' /�,��' �� aR�cNz9-�oc/�,�� lj/�;�� / � �� ` / ��i �/- �/ �� TTS #2 �: � �;;:.� ,� � \ � ` � � ��P "�'� � � �`' � �� ' ' STRUCTURE ID AND DIMENSI0N � �� J� P125B MINERAL P125B INITIAL �/�� ,/ , r�, { �•. � � �:_, # I \ . � `�� \ � �"� � RESERVE AREA �� `�' , EXTRACTION �� rl �/� i �,y s� i �� sEEP �iTCH �` � ,�� €� � � , � �'i �,�� r a�� .. � .: /i � , —� � ` J i % � �`�� . r �� / �� s / I � �1 2.60 ACRES � � � � y� � � � ,/, = 10.1 AC. � AREA = 30.8 AC. /�� ,�� i d�- � � \ J i� � � �- ,�, �',,i. , t ' f��, ��/ �;s1 ;, /i i � � � i' . �_ � \ 11 � �— �� ,:�_� '� �';�/� �%�/% �, —_ �`�y.�% %�� / �s °y� �,, � � � �� # . : � ` / , � , ` \ -,. ,. �' � � � � 2 1 .75 ACRES .< � ::. TEMPORARY TOPSOIL STOCKPILE (TTS) \ . � � �f � � '� • � �� i � ��i�/ ,�,, z� lf'.� �9 � i � � ��. � � � \ � � f � ,Z.' ;PROPOSED �� \� / t� �j �`' �; ,%�� '��r '��'/ ;;� ��'l,� �� v � ��'� ACCESS ROAD .F� � ≤ r �3 1 .4rJ ACRES ,... / ,. � � � , � � ;j �%� ',,�� ',�� ',, ��' � T .f� � �.-�� / / v� r %"� / � / � � � ` � ,�� I�;; � ExisTrN�coN�EYo� � #4 1 .4 5 A C R E S �c � ) , � 333154— ' �� ' �. �� ,/ ' �� fI C0/�D CH�Il�f3URN UNIT 1 Pfl �� < < �� ' � .� � MW-3 7029 � ��'�� % �� '��`� � � � �� /� � � � � ,, % , �� i �P f��- j' � �� , e � ,� ;: �1 14,345 S.F. �� i , ;�f % � % �'� � � �'�. / �;� ��`,� � r� ,�� i ,i , � ��J °: f � �� -i-� �I �'%�// �'% '�� '�� `'t ;��,�� ;�� / ��-� , � � `,',i �� ` �' � ; � EMPLOYEE PARKING AREA � � j � � _-�. � ,-� . ,, �//� � .. � �� ; 1 l,,.. � � , I � I' accEss PoiNT#2 #2 9>120 S.F. � ,�-.,_' i -� , i' � '� � � `;�. � y �� % °' ,� � / � „ , � '`` D I S T U R B A N C E , � , � . � �� . � � ,�� r �;,� ;,� � � ��-� ,� � f �i ,�, �/ .r� / i',�� ,�� ; ' �PROPosE� „ � I � I�: d j #3 15,250 S.F. 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PR0JECT: � � N0TES: SCALE: "I inch = 200 feet Co burn Sand , Gravel and Reservoir Pro ect DATE: 29 AUGUST 2025 8120 GAGE STREET g � FREDERICK, COLORADO 80534 1/� REvisioN: 12 N0VEMBER 2025 TELEPHONE: (303) 666-6657 DRAWING: E X� I� I � l�- �: E x t r a c t i o n P I a n M a p PAGE: 3 0F 3 Fi ure 3 - Reservoir Details � ■ � y- �__ � _ . �` ' �; LEGEND J _ � f✓ ". �g� % -w.��' j�� rr� � I I �`� / � i� � � /ryM ��}� �'1 � ■ 4 � I I � ■ ' � / � - - XXXX EXISTING MAJOR CONTOUR � r-�rt ;'� ` '�� I` � I � � �"f � � EXISTING MINOR CONTOUR � . i � � � . 1 � � , ��r XXXX PROPOSED MAJOR CONTOUR � ,. 5 . - � � - -.�- ,- � --. , 1 , _. - ._ �. -� __ J � - - � � _. .� � , � �, �� ,��', PROPOSED MINOR CONTOUR � �g - � -�� ' �� . � �I�� ';�' BOUNDARY-APPROXIMATE ( � �� r� , - i I�� ! � \ \, ��' s' :; � . . ' �'' ;�� y� �� - �� 200 FOOT BOUNDARY OFFSET-APPROXIMATE 1. , � ■ � �./ , " '�. � �.�R �`�. . 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', � ,'�� ,I - l � • I � "� / � � ',. =��r� . �; � � � ACTION / � � � � -,• � / � INITIAL AREA OF EXTR �� ' � _NR�v�R ,1��.� >� �;� i� � �,�izizEN�oouN�urvir r /si� � � ��/ �� . � � I ' � , �C � wATER-FILLED AREA �� gS vRP\ - 1 � J % I / ' �L �/ � / '' ' � / / _ ..ry��: . 1 / � y / / I I ■ f BACKFILLED �'' \ / o � �,,> � --- � \ � / � � . / I I o ' ..��"�1 CONVEYOR ��--- -- �•- ...... � � . ■ � _� HS2 COGL3URN 6-Z9�Sl� �,� / % ■ / � � �� PIT WATER LEVEL ��-- � �� i . .. � � . . � � � � � — ' ,�� .�� G I , � �� i I oo \�, .:��. :�, , ' ■ - -� • � -------------- LAST CHANCE DITCH BOUNDARY �� ..., � � ' ,�� I� � / • �g •- - / I • � RIVERBANK HSR COGL3URN 5-�9�Pfi� 333296- �p.�,� � � I DISTANCE BETWEEN FOUND PINS ■ 4 � WITNESS CORNER ` ` ; �-- - � �', . ' �. .. . '� ' � / � � I I 800 �� ;� � _ /� I � }-'�,.�r 5 �� /�' t '' - ■ � . � / � � � � FOUND ALIQUOT CORNER AS DESCRIBED � -:. . -� � ��l ��( �� r �t _`� ✓� r'� � ■ ' . � � /' � ' �r."' � � � ��- � � CALCULATED POSITION � 1 � � � =- � �� , � �, � � '� � '� f�� , ., • � � � � � � � � � . �•.� . � " � - � �� , FOUND #5 REBAR WITH 1.25" RED PLASTIC ' � -� '` • CAP LS 37971 N08°26'56" E 3.25' FROM : ,� � J .�� . � ��. � .� � / � . ; : - �. �;- _: � v � , �_ '� ' _ �' * ' � CALCULATED POSITION � 1 - � , ' ,, . : ... �: <.:��. :,�,�. , , . . ,.. .... .. t. . :. � . .... . . ...... . . . .,.,��::- . ... . ,� ... : .:. � . . .,. � ,; � ..... .,: -. =,� :„,. � , / � o ,,�, { k�Yry `� �-F . , � - " ----- ---�- APPROXIMA E PLUGGED &ABANDONED WELL � �' -�-"=: -- �� ,�� _ l�i ;� �%' '� k. . _ . f, _ _ � f � •- Y �' HEAD LOCATION Ct- ,�� -� � - -- -. - _ . �' l////�'�� -- " - 333152- / � i� �� -- � --- i �`■ r�/� ii'�� =:,� .`�'v- --- `J � GATE ,�� r� � � . �� / / fi! � �.�. ' %! �� ` 1 Y�f POST � ' � � jiil'' � ��i ,�; ■ �..� l�/ �`1 , a. � r':. / � `R. � . � a_ , -..; , ! �w WATER WELL �� y �� ,�" � I � �jcP�, ��' 7 ii :::; 4�� ,� � �� -� OIL OR GAS WELL ` ir� � �` �� F .. �.- � ABANDONED OIL OR GAS WELL 9� � / I�'✓fI Rl�EN Z9-9 L _Sl �� /%/ � / �;>;� � �'�� ' �: �- .�' / , : �� _ M�, - .� BATHTUB METHOD OF LINER CONSTRUCTION "`� �� -� �'' � �� t�, ' - � � � �� `� Slope no steeper than 3:1 H:V .�✓ � ,'I � � . . . � j �.�,. 1 , , �j �,/� , �III � __'� ; . � � ■ ,�� // �i/ � ,�� / �` ~_ 1�- , _ '��',� � r DEVELOPED WATER RESOURCES ��"� B �,�� f � ,, ��,a��rn ��-�rr i�';i ;;:� } , � �� WITH GRASS EMBANKMENTS v ,.I > j �.'� � __ . r -�; � . � t � � _ ��> . , � <., � �. � �. •a�, . ` J, / i✓ � I ` .`� � � � �, � � � � � - � � 333154- �� i �(�RI�jC-H�1/�l3URN UNl7 1 �P/I/ �� ;� �� :.� � � � o ,�� / , � � i �� ; �� e, �.��■ / I 4124-F � ; � '^;'I ' ' ■ / !�j� �=..,� ^ n — — — — , - _ � Ul ._ � _ ;_. � �� ' �` - , _ ■ - • - — - _- _ __� �� _ �'` (n ��' , �, �.� �� o . . OJ ��.: z . _ .. . . . . _ - . - - . ' i .• � �. � g . . - �� , , f ��v��i`� i � � ° �� ♦. - �� e - - _.., , ;�� I� ,��, �� , , , � , � � �. . ,,,_ . � 4 �: ;� ��-��, �, , :;,� � . / �o � ;�� . ` / OQ�P� / / I J .,. � _.� ��h� + �. /T' � J�v � � �� . � � ��_�%� � /� � �� /�/ � ��,t�.�t�� L,�1. �� ,, � Q�� / ' j , � ,�/ � 318477- � ��, _�/ , f�I \ .I �. / _ ��,� � �� lY/r1;cict,\','�) ;r5L i'9j . r, i� i . � � / / � �' �/ / �I � ■ � . / f/ /�� / ' � . / � ■ / / � - - - - ' / 1� _ � y _i--^ •�I ' � � � — � � I � �� / ■ � // \ � � � , . _ � �'� Po` � @ ' .__._. .— .� ' � —' _ . _ ' -:�` _ _ _— � / i . _ — _ e � � _ _� ^ TO BE BACKFILLED � �� Y�._. �� ` �,:�� ','• � `{'s}��I��;i�F1 �s,�a _ / � � _ � � � ` '� "K2, FOLLOWING � � � _k --r� I � EXTRACTION _ � � � � � t� : 'F�I�' •...t-r -T- �- � - ,t� /, P-125 S1 � - �� : h.- � � -r�►. ; . - �;`:: Ii,F: . '� —- .. � � �� ► �� `� � � :. � � ' .1 � � �� - � _ � , � ,, { . .,� 1 , ��< <;� �-�: �� . '� � ' " , ` ■ � � .. �::��..,.4c.. � 1 ' , / � „ ;a i . " 299543- �— �� } .� _�., _, . / ` _. .— _ .... _ . . ,. _ w . . _.._.: � . .... , , ..- .... .._: .. , +a•��-{ � , ` • - - _ � . . .; ... __. .._. ._ , __... ..._.. . .. ..� <... ,__ � � . ..... _... ._. � ,.•,... -� . _ � , �. .,COUNTYROAD 28 • . . .�.�,:�-. .. �. __ .. _ .., � � �,_ , ` , , :: ■ �/� � � — � t-�� — — � � � '�+►'�' 1 � � � ` /' 333156- d , �—�;--� , / 1 � � ) / -- � � ■ � �- �� ---�•- �� _.� _ � , � --- - __.._ -- -�� ' �,, • . Il �� . r ' � / � ��-== -- = -� -- 1- -�'�� +� � � ■ . Ic 1 I 1 / ^ �— —r —_ r\ f_\�—�� I� � � 1 � � --- - - -- ` -- J _ , � , �' ." e �.. I f �i = -- = � --��--�— — -- �� (� ��,�, 1 �' . � �� , � ,.r • � , , ; ' � ,.---- --�. ' -- -- — -�. � � `� � -^�,w:w �'t^r " ��"�*'` '''I� � , ( /� . �-�-- _ �--- -�--�- -�--� _�. � A � � � `�� r,, � �` � ,��- I . �� I � �� . l � .. r —__ '^1 � ^~ . . . . _1 �� . . ~ \�� -- � � - � � J� �� . I ■ ■ RAPT0R MATERIALS, LLC. PR0JECT: � ` N0TES: SCALE: "I inch = 200 feet Co burn Sand , Grave and Reservoir Pro ect DATE: 01 November 2024 8120 GAGE STREET g � FREDERICK, COLORADO 80534 + rF REVISI0N: ' � '� TELEPHONE: (303) 666-6657 DRAWING: E X� I� I l I . R e c I a m a t i o n M a p P I a n PAGE: 1 0F 1 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 Date(s) $�z1/2023 Logged By JLA Checked By Drilled Drilling HSA Drill Bit 4 25 Total Depth 38 feet bgs Method Size/Type of Borehale 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 Fa�NE Well Backfil I U C U � o � � N L � � ln � C � ,� ^ Q � � fl- � � N �, 7 d' >, p � > c � H Z m H � p > o `. a� a� � � m L U �� Q � � � 3 � �- �' � — REMARKS AND OTHE � W p � � � -�° � � MATERIAL DESCRIPTION � p � TESTS 4797 0 p� lilili � � � Top soil/overburden,dark brown, moist,some ,�� a Concrete i�i�i� sand and gravel. _/ / _ Bentonite chips - 4792 5 SW - - - - - - - - - Sand,poorly sorted,very fine to very coarse grained,some gravel,brown,moist to wet at 13 feet. a�a� io 1"blank riser ' Note:2.5'above grade _ ' riser 4782 15 4777 20 GM - - - - - - - - Gravel,sand and silt mixture,red-brown,wet. a��z zs 1"0.01 slot PVC well screen 4767 30 4762 35 Shale t Shale,stiff,grey to dark grey. End of Boring 4757 40 4752 45 � 4747 50 N a v � N 4742 55 d O J � 4737 60 `o m N N � 4732 65 � K N N O N � 4�2� �� w � 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 U � U � o Q � N L � N � ^ O- � � fl- 07 � N >, 7 4.' >, p � > � � H Z � H � � .. O .� N � � w (D L U '� J > Q � � � 3 � �- � � - REMARKS AND OTHE W p � � � -�° � � MATERIAL DESCRIPTION � p � TESTS 1 2 3 4 5 6 7 8 9 1 11 1 COLUMN DESCRIPTIONS 1 Elevation(feet): Elevation(MSL,feet). �9 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 samp�e. 3 Sample Type:Type of soil sample collected at the depth interval 1� Dry Unit Weight, pcf: Dry weight per unit volume of soil sample shown. measured in laboratory,in pounds per cubic foot. e4 Sample Number:Sample identification number. 11 Well Log:Graphical representation of well installed upon 5 Sampling Resistance,blows/ft:Number of blows to advance driven completion of drilling and sampling. sampler one foot(or distance shown)beyond seating interval 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. 6 Material Type:Type of material encountered. 7 Graphic Log:Graphic depiction of the subsurface material encountered. �8 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 ///. iiiiiiii i//, Bentonite chips �� Low plasticity PEAT(OL) ///. iiii o�v� Portland Cement Concrete , Shale •A •' Silty GRAVEL(GM) ��;;' Well graded SAND(SW) TYPICAL SAMPLER GRAPHIC SYMBOLS OTHER GRAPHIC SYMBOLS � Auger sampler � CME Sampler I Pitcher Sample water level(at time of drilling,ATD) I� � Water level(after waiting) 2-inch-OD unlined split Bulk Sample Grab Sample spoon(SPT) Minor change in material properties within a � stratum 3-inch-OD California w/ 2.5-inch-OD Modified �i 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 � N a GENERAL NOTES J 1:Soil classifications are based on the Unified Soil Classification System.Descriptions and stratum lines are interpretive,and actual lithologic changes may be � gradual.Field descriptions may have been modified to reflect results of lab tests. 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 d � � N N O N � W � 3 U 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 Date(s) $�z2�2023 Logged By JLA Checked By Drilled Drilling HSA Drill Bit 4 25 Total Depth 25 feet bgs Method Size/Type of Borehale 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 U C U � o � � N L � � ln � C � ,� ^ Q � � fl- � � >N m �, 7 d' >, O � > J o � H Z a�� U " — a� a� _ m �� > Q � � � 3 L �' � � REMARKS AND OTHE � n � � W p � � � -�° � � MATERIAL DESCRIPTION � p TESTS � OL Top soil/overburden,dark brown, moist,some , � Concrete S`N ;, �and and gravel. _ _ _ � Bentonite chips 5 Sand, poorly sorted,very fine to very coarse - grained,some gravel,brown,moist to wet at 4 feet. �0 1"blank riser Note-2.5'above grade riser 15 20 ... - - - - - - - � ��^' .� Gravel,well graded, red-brown,up to 3"gravel, � : 1"0.01 slot PVC � wet. i i well screen ZS Shale � Shale,very stiff,dark grey �!� �!� End of Boring 30 35 40 45 � 50 N a v � N 55 d O J c 60 `o m N N � 65 � � N N O N � 7� W � 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 U � U � o Q � N L � N � ^ O- � � fl- 07 � N >, 7 4.' >, p � > � � H Z � H � � .. O .� N � � w (D L U '� J > Q � � � 3 � �- � � - REMARKS AND OTHE W p � � � -�° � � MATERIAL DESCRIPTION � p � TESTS 1 2 3 4 5 6 7 8 9 1 11 1 COLUMN DESCRIPTIONS 1 Elevation(feet): Elevation(MSL,feet). �9 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 samp�e. 3 Sample Type:Type of soil sample collected at the depth interval 1� Dry Unit Weight, pcf: Dry weight per unit volume of soil sample shown. measured in laboratory,in pounds per cubic foot. e4 Sample Number:Sample identification number. 11 Well Log:Graphical representation of well installed upon 5 Sampling Resistance,blows/ft:Number of blows to advance driven completion of drilling and sampling. sampler one foot(or distance shown)beyond seating interval 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. 6 Material Type:Type of material encountered. 7 Graphic Log:Graphic depiction of the subsurface material encountered. �8 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 ///. iiiiiiii i//, Bentonite chips �� Low plasticity PEAT(OL) ///. iiii o�v� Portland Cement Concrete , Shale •A •�/ �-�� Well graded GRAVEL(GW) ��;' Well graded SAND(SW) -� - TYPICAL SAMPLER GRAPHIC SYMBOLS OTHER GRAPHIC SYMBOLS � Auger sampler � CME Sampler I Pitcher Sample water level(at time of drilling,ATD) I� � Water level(after waiting) 2-inch-OD unlined split Bulk Sample Grab Sample spoon(SPT) Minor change in material properties within a � stratum 3-inch-OD California w/ 2.5-inch-OD Modified �i 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 � N a GENERAL NOTES J 1:Soil classifications are based on the Unified Soil Classification System.Descriptions and stratum lines are interpretive,and actual lithologic changes may be � gradual.Field descriptions may have been modified to reflect results of lab tests. 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 d � � N N O N � W � 3 U 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 Date(s) $�z2�2023 Logged By JLA Checked By Drilled Drilling HSA Drill Bit 4 25 Total Depth 35 feet bgs Method Size/Type of Borehale 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 Fa�West Centl'al Well Backfil I U C U � o � N N � �<n C � � `d '� Q 7 � Q p � ≥ 'J o � H Z a�� U U � a� a� a� — � "c � > Q � � � 3 L °' � REMARKS AND OTHE � n � � W p � � � -�° � � MATERIAL DESCRIPTION � p TESTS � OL Top soil/overburden,dark brown, moist,some , � Concrete sw-snn � �and and gravel. _ _ _� Bentonite chips 5 Sand, poorly sorted,fine to coarse grained, with gravel,wet at 6'bgs. _ �0 1"blank riser 15 20 � - - - - - - - - - ��^' .� Gravel,well graded, red-brown,wet,gravel up � � � to 5". � � .�. .1. ��. zs • • • 1"0.01 slot PVC .1. .1. �1. � � � well screen .�. .1. ��. 30 � � Shale t Shale,dark grey,very stiff. •�' '�` • • �1� ,1� 35 � � End of boring 40 45 � 50 N a v � N 55 d O J c 60 `o m N N � 65 � � N N O N � 7� W � 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 U � U � o Q � N L � N � ^ O- � � fl- 07 � N >, 7 4.' >, p � > � � H Z � H � � .. O .� N � � w (D L U '� J > Q � � � 3 � �- � � - REMARKS AND OTHE W p � � � -�° � � MATERIAL DESCRIPTION � p � TESTS 1 2 3 4 5 6 7 8 9 1 11 1 COLUMN DESCRIPTIONS 1 Elevation(feet): Elevation(MSL,feet). �9 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 samp�e. 3 Sample Type:Type of soil sample collected at the depth interval 1� Dry Unit Weight, pcf: Dry weight per unit volume of soil sample shown. measured in laboratory,in pounds per cubic foot. e4 Sample Number:Sample identification number. 11 Well Log:Graphical representation of well installed upon 5 Sampling Resistance,blows/ft:Number of blows to advance driven completion of drilling and sampling. sampler one foot(or distance shown)beyond seating interval 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. 6 Material Type:Type of material encountered. 7 Graphic Log:Graphic depiction of the subsurface material encountered. �8 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 ///. iiiiiiii i//, Bentonite chips �� Low plasticity PEAT(OL) ///. iiii o�v� Portland Cement Concrete , Shale •A •�/ �-�� `�� Well graded GRAVEL(GW) :•J'LtF Well graded SAND with Silt(SW-SM) -' - - 1llf TYPICAL SAMPLER GRAPHIC SYMBOLS OTHER GRAPHIC SYMBOLS � Auger sampler � CME Sampler I Pitcher Sample water level(at time of drilling,ATD) I� � Water level(after waiting) 2-inch-OD unlined split Bulk Sample Grab Sample spoon(SPT) Minor change in material properties within a � stratum 3-inch-OD California w/ 2.5-inch-OD Modified �i 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 � N a GENERAL NOTES J 1:Soil classifications are based on the Unified Soil Classification System.Descriptions and stratum lines are interpretive,and actual lithologic changes may be � gradual.Field descriptions may have been modified to reflect results of lab tests. 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 d � � N N O N � W � 3 U 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 Date(s) $�z2�2023 Logged By JLA Checked By Drilled Drilling HSA Drill Bit 4 25 Total Depth 25 feet bgs Method Size/Type of Borehale Drill Rig Diedrich Drilling DrillPro Services Approximate Type Contractor Surface Elevation Groundwater Level $,bgs Sampling Cuttings Hammer PerCussion and Date Measured Method(s) Data Borehole Location Fa�Nolthwest Well Backfil I U C U � o � � N L � � ln � C � m � •�-• �- � � �' � N '� O �, 7 d' >, p � > J o � H Z a�� (j '- � a� a� _ m �� > Q � � � 3 L °' � REMARKS AND OTHE � n � � W p � � � -�° � � MATERIAL DESCRIPTION � p TESTS � OL Top soil/overburden,dark brown, moist,some , � Concrete S`N ;, �and and gravel. _ _ _� Bentonite chips 5 Sand, poorly sorted,fine to coarse grained, with gravel,wet at 6'bgs. �0 1"blank riser 15 1"0.01 slot PVC �� ' � ��' well screen ��^' •�. Gravel,well graded,red-brown,wet. •�. ��. zo � � � .1. .1. �1. • • Shale � Shale,dark grey,very stiff. `�` '�` ZS End of boring 30 35 40 45 � 50 N a v � N 55 d O J c 60 `o m N N � 65 � � N N O N � 7� W � 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 U � U � o Q � N L � N � ^ O- � � fl- 07 � N >, 7 4.' >, p � > � � H Z � H � � .. O .� N � � w (D L U '� J > Q � � � 3 � �- � � - REMARKS AND OTHE W p � � � -�° � � MATERIAL DESCRIPTION � p � TESTS 1 2 3 4 5 6 7 8 9 1 11 1 COLUMN DESCRIPTIONS 1 Elevation(feet): Elevation(MSL,feet). �9 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 samp�e. 3 Sample Type:Type of soil sample collected at the depth interval 1� Dry Unit Weight, pcf: Dry weight per unit volume of soil sample shown. measured in laboratory,in pounds per cubic foot. e4 Sample Number:Sample identification number. 11 Well Log:Graphical representation of well installed upon 5 Sampling Resistance,blows/ft:Number of blows to advance driven completion of drilling and sampling. sampler one foot(or distance shown)beyond seating interval 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. 6 Material Type:Type of material encountered. 7 Graphic Log:Graphic depiction of the subsurface material encountered. �8 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 ///. iiiiiiii i//, Bentonite chips �� Low plasticity PEAT(OL) ///. iiii o�v� Portland Cement Concrete , Shale •A •�/ �-�� Well graded GRAVEL(GW) ��;' Well graded SAND(SW) -� - TYPICAL SAMPLER GRAPHIC SYMBOLS OTHER GRAPHIC SYMBOLS � Auger sampler � CME Sampler I Pitcher Sample water level(at time of drilling,ATD) I� � Water level(after waiting) 2-inch-OD unlined split Bulk Sample Grab Sample spoon(SPT) Minor change in material properties within a � stratum 3-inch-OD California w/ 2.5-inch-OD Modified �i 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 � N a GENERAL NOTES J 1:Soil classifications are based on the Unified Soil Classification System.Descriptions and stratum lines are interpretive,and actual lithologic changes may be � gradual.Field descriptions may have been modified to reflect results of lab tests. 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 d � � N N O N � W � 3 U 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 Date(s) $�z3/2023 Logged By JLA Checked By Drilled Drilling HSA Drill Bit 4 25 Total Depth 43 feet bgs Method Size/Type of Borehale 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 Fa�Southwest Well Backfil I U C U � o � � N L � y `d '� Q 7 � Q p� � ≥ � o � H Z a�� U " m a� a� _ m � � � L � Q � � � 3 � � REMARKS AND OTHE W p � � � -�° � � MATERIAL DESCRIPTION � p TESTS ° o� ,�� Top soil/overburden,dark brown, moist,some , � Concrete i�i�i� sand and gravel. Bentonite chips �'�'�' 5 �� S`N Sand, poorly sorted,fine to coarse grained, with gravel,wet at 6'bgs. �0 1"blank riser 15 20 ... — — — — — — — — — � ��^' .1� Gravel,well graded, red-brown,wet. .� ,� • • • .�� .1� �� 25 • I • �1t •1� �1� • • • ��t �1� ��t 30 .: .� ,: 1"0.01 slot PVC � � � well screen .�. .1. ��. 35 �� ,� • • • ��t �1� ��t • I • 40 •� '� Shale Shale,dark grey,very stiff. � � �� End of boring 45 � 50 N a v � N 55 d O J c 60 `o m N N � 65 � � N N O N � 7� W � 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 U � U � o Q � N L � N � ^ O- � � fl- 07 � N >, 7 4.' >, p � > � � H Z � H � � .. O .� N � � w (D L U '� J > Q � � � 3 � �- � � - REMARKS AND OTHE W p � � � -�° � � MATERIAL DESCRIPTION � p � TESTS 1 2 3 4 5 6 7 8 9 1 11 1 COLUMN DESCRIPTIONS 1 Elevation(feet): Elevation(MSL,feet). �9 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 samp�e. 3 Sample Type:Type of soil sample collected at the depth interval 1� Dry Unit Weight, pcf: Dry weight per unit volume of soil sample shown. measured in laboratory,in pounds per cubic foot. e4 Sample Number:Sample identification number. 11 Well Log:Graphical representation of well installed upon 5 Sampling Resistance,blows/ft:Number of blows to advance driven completion of drilling and sampling. sampler one foot(or distance shown)beyond seating interval 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. 6 Material Type:Type of material encountered. 7 Graphic Log:Graphic depiction of the subsurface material encountered. �8 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 ///. iiiiiiii i//, Bentonite chips �� Low plasticity PEAT(OL) ///. iiii o�v� Portland Cement Concrete , Shale •A •�/ �-�� Well graded GRAVEL(GW) ��;' Well graded SAND(SW) -� - TYPICAL SAMPLER GRAPHIC SYMBOLS OTHER GRAPHIC SYMBOLS � Auger sampler � CME Sampler I Pitcher Sample water level(at time of drilling,ATD) I� � Water level(after waiting) 2-inch-OD unlined split Bulk Sample Grab Sample spoon(SPT) Minor change in material properties within a � stratum 3-inch-OD California w/ 2.5-inch-OD Modified �i 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 � N a GENERAL NOTES J 1:Soil classifications are based on the Unified Soil Classification System.Descriptions and stratum lines are interpretive,and actual lithologic changes may be � gradual.Field descriptions may have been modified to reflect results of lab tests. 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 d � � N N O N � W � 3 U 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 Date(s) $�z3/2023 Logged By JLA Checked By Drilled Drilling HSA Drill Bit 4 25 Total Depth 53 feet bgs Method Size/Type of Borehale 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 Fa�Southeast Well Backfil I U C U � o � � N L � y `d '� Q 7 � Q p� � ≥ � o � H Z a�� U " m a� a� _ m � � � L � Q � � � 3 � � REMARKS AND OTHE W p � � � -�° � � MATERIAL DESCRIPTION � p TESTS ° o� ,�� Top soil/overburden,dark brown, moist,some , � Concrete i�i�i� sand and gravel. Bentonite chips s S'N Sand, poorly sorted,fine to coarse grained, with gravel,wet at 6'bgs. �0 1"blank riser 15 20 ... — — — — — — — — — — � ��^' .� Gravel,well graded,gravel sand mixture, � � � red-brown,wet. � � .�� .1� �� 25 • I • �1t •1� �1� • • • ��t �1� ��t 30 .: .� ,: 1"0.01 slot PVC � � � well screen .�. .1. ��. 35 �� ,� • • • ��t �1� ��t • I • 40 �� •�� • • • ��t �1� ��t • I • 45 �� • • • ��t �1� ��t • I • �t •� �� N 50 Shale t Shale,dark grey,very stiff. �! ,� a � � � � � � End of boring N 55 d O J c 60 `o m N N � 65 � � N N O N � 7� W � 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 U � U � o Q � N L � N � ^ O- � � fl- 07 � N >, 7 4.' >, p � > � � H Z � H � � .. O .� N � � w (D L U '� J > Q � � � 3 � �- � � - REMARKS AND OTHE W p � � � -�° � � MATERIAL DESCRIPTION � p � TESTS 1 2 3 4 5 6 7 8 9 1 11 1 COLUMN DESCRIPTIONS 1 Elevation(feet): Elevation(MSL,feet). �9 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 samp�e. 3 Sample Type:Type of soil sample collected at the depth interval 1� Dry Unit Weight, pcf: Dry weight per unit volume of soil sample shown. measured in laboratory,in pounds per cubic foot. e4 Sample Number:Sample identification number. 11 Well Log:Graphical representation of well installed upon 5 Sampling Resistance,blows/ft:Number of blows to advance driven completion of drilling and sampling. sampler one foot(or distance shown)beyond seating interval 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. 6 Material Type:Type of material encountered. 7 Graphic Log:Graphic depiction of the subsurface material encountered. �8 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 ///. iiiiiiii i//, Bentonite chips �� Low plasticity PEAT(OL) ///. iiii o�v� Portland Cement Concrete , Shale •A •�/ �-�� Well graded GRAVEL(GW) ��;' Well graded SAND(SW) -� - TYPICAL SAMPLER GRAPHIC SYMBOLS OTHER GRAPHIC SYMBOLS � Auger sampler � CME Sampler I Pitcher Sample water level(at time of drilling,ATD) I� � Water level(after waiting) 2-inch-OD unlined split Bulk Sample Grab Sample spoon(SPT) Minor change in material properties within a � stratum 3-inch-OD California w/ 2.5-inch-OD Modified �i 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 � N a GENERAL NOTES J 1:Soil classifications are based on the Unified Soil Classification System.Descriptions and stratum lines are interpretive,and actual lithologic changes may be � gradual.Field descriptions may have been modified to reflect results of lab tests. 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 d � � N N O N � W � 3 U 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 C�►/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) Pa-ep�ration ❑ 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 Satri�l�n� Srl� ❑ 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 ��zn�ple �a��l��:x�n ❑ 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 P��ratic�x� ❑ Acidify to pH <2 with HNO3 (unless lab pre-acidifies) ❑ Cap tightly and invert gently to mix ❑ Place samples in cooler immediately (≤6°C) ��C ��1�� ❑ 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) �I��cl�� '�"�� 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 17t��um�nt�ti�r� ❑ Record: Date,time, GPS location ❑ Sampler name(s), Sample ID ❑ Field parameters (pH, DO, conductivity,temp) ❑ Weather conditions ❑ Complete chain-of-custody form T �T'� _ .,�' ��f!'iY .i��a -�� • .;:� Y' . . .�+rF �'--. ��+ �merican Water EnsEineerinaE Services, LLC « - December 19, 2025 Patrick Lennberg 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 DRMS Letter Date October 15, 2025 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 October 15, 2025. 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 12 — Why did the groundwater model exclude locations MW-5 and MW-6? These wells were not excluded from the model calibration and average water levels from the six monitoring wells installed by Raptor were used in the calibration runs. After the calibration model runs, I added four model assigned wells (identified as VM-1 — VM-4) and used the predicted water levels at those points as observed levels — these levels closely approximated measured values. Dewatering and reservoir scenarios generated predicted groundwater levels and these where then compared to the observed values generated in the calibration runs. 2. Comment 13 — In Tables 1-4 additional explanation of the values are needed. The groundwater elevations shown for MW-3 are 11 feet lower than any level that has ever been recorded at the location. The elevations used for MW-4, calibrated and predicted, are two feet higher than the ground elevation surveyed at that location. In Table 4 it shows that at complete build out the water level at MW-3 will be 6 feet higher than surrounding ground surface at that location. Yet in the conclusion section it is stated that the effects of lining the mined out pits will not adversely affect the regional groundwater hydrology. In the model wells VM-1 through MW-44 are model assigned wells and have no correlation to location or measured levels in Raptor monitoring wells 1 through 6. The calibration water levels were obtained by trial and error methods of adjusting the constant head (associated with adjacent mine dewatering) general head and river boundary head values until the head levels at known points (wells 1-6)fell within the seasonal variation of ineasured levels. After these criteria were Response to DRMS Comments October 15, 2025 Response Letter Page 2 met I considered the model calibrated and then added constant head and lake boundary conditions to simulate pit dewatering and reservoir storage for the P125 mine. 3. Comment 14 - Please provide a discussion of possible mitigation measures that the Applicant could take in the event groundwater mounding or shadowing adversely affect the groundwater hydrology, include in the discussion the installation of underdrains and infiltration galleries. The mass balance of ground and surface water will not be affected. There will be very localized changes in groundwater gradients and flow direction. Should shadow and mounding is predicted to occur but head levels at any distance greater than 500 feet from the mine face are within the seasonal groundwater table rise and fall. Should mitigation of gradient changes be required Raptor can install a perimeter drain (French drain), relief wells or keyways within the pit liner that allows groundwater to pass in and out of the reservoir once a certain head level is achieved. Raptor can agree to a trigger point, based on groundwater head levels, that once reached mitigation would be initiated. The Groundwater Monitoring Plan and Mining and Water Storage report 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 �� Joby Adams, P.G., REM Principal/Hydrogeologist ��N �S t�l 1 1�ur�lar/ � u�l.f� rt/ � Ilin�.1 / �I 7I t I11 i 11 t�l ! / �� TECHNOLOGY LABORATORY, INC. / CENTRE PROFESSIONAL PARK � 1012 Centre Avenue Fort Collins,Colorado 80526 (970)490-1414 CERTIFICATE OF ANALYSIS Raptor Materials, LLC Sampled: 08/26/25 8120 Gage St. Received: 08/26/25 Frederick, CO 80516 Sample ID: MW-2 Project No.: P125-DRMS WQ- MW3 Laboratory ID: D1494-01 Matrix: Water CAS Date Number Parameter Result Units MDL Method Analyzed 7429-90-5 Dissolved Aluminum < 0.1 mg/L 0.1 EPA-200.7 08/29/25 7440-39-3 Dissolved Barium < 0.08 mg/L 0.08 EPA-200.7 08/29/25 7440-42-8 Dissolved Boron 0.248 mg/L 0.1 EPA-200.7 08/29/25 7439-89-6 Dissolved Iron < 0.02 mg/L 0.02 EPA-200.7 08/29/25 7439-93-2 Dissolved Lithium < 0.05 mg/L 0.05 EPA-200.7 08/29/25 7440-62-2 Dissolved Vanadium < 0.005 mg/L 0.005 EPA-200.7 08/29/25 7440-36-0 Dissolved Antimony < 0.006 mg/L 0.006 EPA-200.8 09/04/25 7440-38-2 Dissolved Arsenic < 0.005 mg/L 0.005 EPA-200.8 09/05/25 7440-38-2 Total Arsenic 0.008 mg/L 0.005 EPA-200.8 09/05/25 7440-41-7 Dissolved Beryllium < 0.003 mg/L 0.003 EPA-200.8 09/04/25 7440-43-9 Dissolved Cadmium < 0.001 mg/L 0.001 EPA-200.8 09/04/25 7440-47-3 Dissolved Chromium < 0.004 mg/L 0.004 EPA-200.8 09/04/25 7440-48-4 Dissolved Cobalt < 0.006 mg/L 0.006 EPA-200.8 09/04/25 7440-50-8 Dissolved Copper < 0.005 mg/L 0.005 EPA-200.8 09/04/25 7439-92-1 Dissolved Lead < 0.003 mg/L 0.003 EPA-200.8 09/04/25 7439-96-5 Dissolved Manganese < 0.004 mg/L 0.004 EPA-200.8 09/04/25 7439-98-7 Dissolved Molybdenum < 0.008 mg/L 0.008 EPA-200.8 09/04/25 7440-02-0 Dissolved Nickel < 0.005 mg/L 0.005 EPA-200.8 09/04/25 7782-49-2 Dissolved Selenium < 0.005 mg/L 0.005 EPA-200.8 09/04/25 7440-22-4 Dissolved Silver < 0.002 mg/L 0.002 EPA-200.8 09/04/25 7440-28-0 Dissolved Thallium < 0.001 mg/L 0.001 EPA-200.8 09/04/25 7440-61-1 Dissolved Uranium 0.022 mg/L 0.003 EPA-200.8 09/04/25 7440-66-6 Dissolved Zinc < 0.002 mg/L 0.002 EPA-200.8 09/04/25 7439-97-6 Dissolved Mercury < 5.0 ng/L 5 EPA-245.7 09/02/25 The results contained in this report relate only to those items tested. Page 1 of 7 / �� TECHNOLOGY LABORATORY, INC. / CENTRE PROFESSIONAL PARK � 1012 Centre Avenue Fort Collins,Colorado 80526 (970)490-1414 CERTIFICATE OF ANALYSIS Raptor Materials, LLC Sampled: 08/26/25 8120 Gage St. Received: 08/26/25 Frederick, CO 80516 Sample ID: MW-2 Project No.: P125-DRMS WQ- MW3 Laboratory ID: D1494-01 Matrix: Water CAS Date Number Parameter Result Units MDL Method Analyzed 84145-82-4 Nitrate-N 3.57 mg/L 0.1 EPA-300.0 08/26/25 14797-65-0 Nitrite-N < 0.05 mg/L 0.05 EPA-300.0 08/26/25 18785-72-3 Sulfate 328 mg/L 0.3 EPA-300.0 09/04/25 N/A Total Dissolved Solids 904 mg/L 5 SM-2540 C 08/27/25 (TDS) The results contained in this report relate only to those items tested. Page 2 of 7 / �� TECHNOLOGY LABORATORY, INC. / CENTRE PROFESSIONAL PARK � 1012 Centre Avenue Fort Collins,Colorado 80526 (970)490-1414 CERTIFICATE OF ANALYSIS Raptor Materials, LLC Sampled: 08/26/25 8120 Gage St. Received: 08/26/25 Frederick, CO 80516 Sample ID: MW-3 Project No.: P125-DRMS WQ- MW3 Laboratory ID: D1494-02 Matrix: Water CAS Date Number Parameter Result Units MDL Method Analyzed 7429-90-5 Dissolved Aluminum < 0.1 mg/L 0.1 EPA-200.7 08/29/25 7440-39-3 Dissolved Barium < 0.08 mg/L 0.08 EPA-200.7 08/29/25 7440-42-8 Dissolved Boron 0.223 mg/L 0.1 EPA-200.7 08/29/25 7439-89-6 Dissolved Iron < 0.02 mg/L 0.02 EPA-200.7 08/29/25 7439-93-2 Dissolved Lithium < 0.05 mg/L 0.05 EPA-200.7 08/29/25 7440-62-2 Dissolved Vanadium < 0.005 mg/L 0.005 EPA-200.7 08/29/25 7440-36-0 Dissolved Antimony < 0.006 mg/L 0.006 EPA-200.8 09/04/25 7440-38-2 Dissolved Arsenic < 0.005 mg/L 0.005 EPA-200.8 09/05/25 7440-38-2 Total Arsenic 0.006 mg/L 0.005 EPA-200.8 09/05/25 7440-41-7 Dissolved Beryllium < 0.003 mg/L 0.003 EPA-200.8 09/04/25 7440-43-9 Dissolved Cadmium < 0.001 mg/L 0.001 EPA-200.8 09/04/25 7440-47-3 Dissolved Chromium < 0.004 mg/L 0.004 EPA-200.8 09/04/25 7440-48-4 Dissolved Cobalt < 0.006 mg/L 0.006 EPA-200.8 09/04/25 7440-50-8 Dissolved Copper < 0.005 mg/L 0.005 EPA-200.8 09/04/25 7439-92-1 Dissolved Lead < 0.003 mg/L 0.003 EPA-200.8 09/04/25 7439-96-5 Dissolved Manganese 0.107 mg/L 0.004 EPA-200.8 09/04/25 7439-98-7 Dissolved Molybdenum < 0.008 mg/L 0.008 EPA-200.8 09/04/25 7440-02-0 Dissolved Nickel < 0.005 mg/L 0.005 EPA-200.8 09/04/25 7782-49-2 Dissolved Selenium < 0.005 mg/L 0.005 EPA-200.8 09/04/25 7440-22-4 Dissolved Silver < 0.002 mg/L 0.002 EPA-200.8 09/04/25 7440-28-0 Dissolved Thallium < 0.001 mg/L 0.001 EPA-200.8 09/04/25 7440-61-1 Dissolved Uranium 0.013 mg/L 0.003 EPA-200.8 09/04/25 7440-66-6 Dissolved Zinc < 0.002 mg/L 0.002 EPA-200.8 09/04/25 7439-97-6 Dissolved Mercury < 5.0 ng/L 5 EPA-245.7 09/02/25 The results contained in this report relate only to those items tested. Page 3 of 7 / �� TECHNOLOGY LABORATORY, INC. / CENTRE PROFESSIONAL PARK � 1012 Centre Avenue Fort Collins,Colorado 80526 (970)490-1414 CERTIFICATE OF ANALYSIS Raptor Materials, LLC Sampled: 08/26/25 8120 Gage St. Received: 08/26/25 Frederick, CO 80516 Sample ID: MW-3 Project No.: P125-DRMS WQ- MW3 Laboratory ID: D1494-02 Matrix: Water CAS Date Number Parameter Result Units MDL Method Analyzed 84145-82-4 Nitrate-N < 0.1 mg/L 0.1 EPA-300.0 08/26/25 14797-65-0 Nitrite-N 0.088 mg/L 0.05 EPA-300.0 08/26/25 18785-72-3 Sulfate 291 mg/L 0.3 EPA-300.0 08/26/25 N/A Total Dissolved Solids 750 mg/L 5 SM-2540 C 08/27/25 (TDS) The results contained in this report relate only to those items tested. Page 4 of 7 / �� TECHNOLOGY LABORATORY, INC. / CENTRE PROFESSIONAL PARK � 1012 Centre Avenue Fort Collins,Colorado 80526 (970)490-1414 CERTIFICATE OF ANALYSIS Raptor Materials, LLC Sampled: 08/26/25 8120 Gage St. Received: 08/26/25 Frederick, CO 80516 Sample ID: MW-2 Duplicate Project No.: P125-DRMS WQ- MW3 Laboratory ID: D1494-03 Matrix: Water CAS Date Number Parameter Result Units MDL Method Analyzed 7429-90-5 Dissolved Aluminum < 0.1 mg/L 0.1 EPA-200.7 08/29/25 7440-39-3 Dissolved Barium < 0.08 mg/L 0.08 EPA-200.7 08/29/25 7440-42-8 Dissolved Boron 0.236 mg/L 0.1 EPA-200.7 08/29/25 7439-89-6 Dissolved Iron < 0.02 mg/L 0.02 EPA-200.7 08/29/25 7439-93-2 Dissolved Lithium < 0.05 mg/L 0.05 EPA-200.7 08/29/25 7440-62-2 Dissolved Vanadium < 0.005 mg/L 0.005 EPA-200.7 08/29/25 7440-36-0 Dissolved Antimony < 0.006 mg/L 0.006 EPA-200.8 09/04/25 7440-38-2 Dissolved Arsenic < 0.005 mg/L 0.005 EPA-200.8 09/05/25 7440-38-2 Total Arsenic 0.008 mg/L 0.005 EPA-200.8 09/05/25 7440-41-7 Dissolved Beryllium < 0.003 mg/L 0.003 EPA-200.8 09/04/25 7440-43-9 Dissolved Cadmium < 0.001 mg/L 0.001 EPA-200.8 09/04/25 7440-47-3 Dissolved Chromium < 0.004 mg/L 0.004 EPA-200.8 09/04/25 7440-48-4 Dissolved Cobalt < 0.006 mg/L 0.006 EPA-200.8 09/04/25 7440-50-8 Dissolved Copper < 0.005 mg/L 0.005 EPA-200.8 09/04/25 7439-92-1 Dissolved Lead < 0.003 mg/L 0.003 EPA-200.8 09/04/25 7439-96-5 Dissolved Manganese < 0.004 mg/L 0.004 EPA-200.8 09/04/25 7439-98-7 Dissolved Molybdenum < 0.008 mg/L 0.008 EPA-200.8 09/04/25 7440-02-0 Dissolved Nickel < 0.005 mg/L 0.005 EPA-200.8 09/04/25 7782-49-2 Dissolved Selenium 0.005 mg/L 0.005 EPA-200.8 09/04/25 7440-22-4 Dissolved Silver < 0.002 mg/L 0.002 EPA-200.8 09/04/25 7440-28-0 Dissolved Thallium < 0.001 mg/L 0.001 EPA-200.8 09/04/25 7440-61-1 Dissolved Uranium 0.022 mg/L 0.003 EPA-200.8 09/04/25 7440-66-6 Dissolved Zinc < 0.002 mg/L 0.002 EPA-200.8 09/04/25 7439-97-6 Dissolved Mercury < 5.0 ng/L 5 EPA-245.7 09/02/25 The results contained in this report relate only to those items tested. Page 5 of 7 / �� TECHNOLOGY LABORATORY, INC. / CENTRE PROFESSIONAL PARK � 1012 Centre Avenue Fort Collins,Colorado 80526 (970)490-1414 CERTIFICATE OF ANALYSIS Raptor Materials, LLC Sampled: 08/26/25 8120 Gage St. Received: 08/26/25 Frederick, CO 80516 Sample ID: MW-2 Duplicate Project No.: P125-DRMS WQ- MW3 Laboratory ID: D1494-03 Matrix: Water CAS Date Number Parameter Result Units MDL Method Analyzed 84145-82-4 Nitrate-N 3.57 mg/L 0.1 EPA-300.0 08/26/25 14797-65-0 Nitrite-N < 0.05 mg/L 0.05 EPA-300.0 08/26/25 18785-72-3 Sulfate 326 mg/L 0.3 EPA-300.0 09/04/25 N/A Total Dissolved Solids 864 mg/L 5 SM-2540 C 08/27/25 (TDS) The results contained in this report relate only to those items tested. Page 6 of 7 � i/ TECHNOLOGY LABORATORY, INC. /� Fort C(9�0)90 A�q $0526 QA/QC Certificate of Analysis Project No.: P125-DRMS WQ-MW3 Date Sampled: 8/26/2025 LabID: D1494 Date Calibration IPC IPC LFM LFM LFB LFB QCS QCS Analvzed Parameter bv EPA 200.7 Batch ID Blank %Recovery %Limits %Recovery %Limits %Recovery %Limits LRB %Recovery %Limits 8/29/2025 Aluminum,Dissolved 8/29/2025 <MDL 101 95-105 115 70-130 111 85-115 <MDL 103 95-105 8/29/2025 Barium,Dissolved 8/29/2025 <MDL 104 95-105 97 70-130 108 85-115 <MDL 102 95-105 8/29/2025 Boron,Dissolved 8/29/2025 <MDL 104 95-105 91 70-130 98 85-115 <MDL 103 95-105 8/29/2025 Iron,Dissolved 8/29/2025 <MDL 104 95-105 106 70-130 108 85-115 <MDL 102 95-105 8/29/2025 Lithium,Dissolved 8/29/2025 <MDL 99 95-105 87 70-130 102 85-115 <MDL 102 95-105 8/29/2025 Vanadium,Dissolved 8/29/2025 <MDL 104 95-105 101 70-130 106 85-115 <MDL 102 95-105 Date Calibration ICC ICC LFM LFM LFB LFB QCS QCS Analvzed Paremeter bv EPA 200.8 Batch ID Blank %Recovery %Limits %Recovery %Limits %Recovery %Limits LRB %Recovery %Limits 9/4/2025 Antimony,Dissolved 9/4/2025 <MDL 101 90-110 106 70-130 104 85-115 <MDL 100 90-110 9/5/2025 Arsenic,Total&Dissolved 9/5/2025 <MDL 101 90-110 130 70-130 106 85-115 <MDL 94 90-110 9/4/2025 Beryllium,Dissolved 9/4/2025 <MDL 100 90-110 94 70-130 103 85-115 <MDL 94 90-110 9/4/2025 Cadmium,Dissolved 9/4/2025 <MDL 104 90-110 106 70-130 108 85-115 <MDL 100 90-110 9/4/2025 Chromium,Dissolved 9/4/2025 <MDL 106 90-110 97 70-130 115 85-115 <MDL 107 90-110 9/4/2025 Cobalt,Dissolved 9/4/2025 <MDL 105 90-110 92 70-130 111 85-115 <MDL 103 90-110 9/4/2025 Copper,Dissolved 9/4/2025 <MDL 105 90-110 77 70-130 107 85-115 <MDL 98 90-110 9/4/2025 Lead,Dissolved 9/4/2025 <MDL 99 90-110 107 70-130 99 85-115 <MDL 100 90-110 9/4/2025 Manganese,Dissolved 9/4/2025 <MDL 106 90-110 83 70-130 112 85-115 <MDL 105 90-110 9/4/2025 Molybdenum,Dissolved 9/4/2025 <MDL 105 90-110 102 70-130 104 85-115 <MDL 105 90-110 9/4/2025 Nickel,Dissolved 9/4/2025 <MDL 104 90-110 88 70-130 113 85-115 <MDL 103 90-110 9/4/2025 Selenium,Dissolved 9/4/2025 <MDL 101 90-110 107 70-130 111 85-115 <MDL 108 90-110 9/4/2025 Silver,Dissolved 9/4/2025 <MDL 99 90-110 102 70-130 100 85-115 <MDL 95 90-110 9/4/2025 Thallium,Dissolved 9/4/2025 <MDL 101 90-110 109 70-130 97 85-115 <MDL 92 90-110 9/4/2025 Uranium,Dissolved 9/4/2025 <MDL 100 90-110 108 70-130 104 85-115 <MDL 105 90-110 9/4/2025 Zinc,Dissolved 9/4/2025 <MDL 109 90-110 86 70-130 107 85-115 <MDL 101 90-110 Date IPR IPR QCS QCS MS MS MSD MSD Analvzed Parameter bv EPA 245.7 Batch ID %Recovery %Limits %Recovery %Limits MB %Recovery %Limits %Recovery %Limits 9/2/2025 Mercury 9/2/2025 107 78-108 95 76-113 ND 89 63-111 89 63-111 Date Blank LFB LFB MS MS Analvzed Parameter bv EPA 300.0 Batch ID Amount %Recovery %Limits %Recovery %Limits 8/26/2025 Nitrate 8/26/2025 <MDL 99 90-110 98 80-120 8/26/2025 Nitrite 8/26/2025 <MDL 101 90-110 100 80-120 8/26/2025 Sulfate 8/26/2025 <MDL 97 90-110 98 80-120 9/4/2025 Sulfate 9/4/2025 <MDL 98 90-110 89 80-120 'ICC=Initial Calibration Check *IPC=Instrument Performance Check *MS=Matrix Spike 'LCS=Laboratory Control Sample 'MSD=Matrix Spike Duplicate *LFB=Laboratory Fortified Blank *N/A=Not Applicable 'LFM=Laboratory Fortified Matrix *ND=Not detected at MDL *LRB=Laboratory Reagent Blank *OPR=Ongoing Precision&Recovery *MB=Matrix Blank *QC=Quality Control Sample *MDL=Method Detection Limit 'QCS=Second Source QC Sample Page 7 of 7 3ZAl`dN`d 1,NO4'410H �✓� - L N � SISAIb�NtJ 2131j'd dIOH o � � I � �� _ � F ,� F LL; � � ¢ � ¢ � � v o r= o f- I I � � y � � o = Cr Z LL • � a ❑ ❑ O I a o z � '� � u x m ;o 1/1 � u WVI Q _ � � � �. , m >- o � � � � o � � � zo j _ ° ~ � �' � � cn �, � � � � Z �_ o� _ U a - � , > e � Z � O _ m m � o � z � z � � 9 C'f'��v�� w j � � a o C7 I i va S�� s��,L � X �( p " � " � _ z � � ° � ° a sa��ilaed eyd�y ssag x x � ;r1 3 � ,�.11 uZ`n'n'�l`�y'a$'�N'oW'$H �v � 0 _ "�W'!1'qd`a�'n�`o�'��'P�`a8 x x � �a, � ` U `8'e9`St/'QS'Ib':s�e�aW pan�ossip 0 c\, s` Z � a a]e;�nS x X � I � .� .. .. o w w w w a;!�;!N x x X a � a � o � o � a�e�;iN X X N SOl x x } � v E 5213NId1N0��02i38Wf1N � � � XI ��K ° U (O)213H10 (M)Sf103f1bV ' � � z (v)aro fs)iios �xialrw aiawds � � � �� o — -- � �'6 > a J � � � w ; o � m � w F- � � \� �. � � e� ,o' w ,n \n .� �Q/ ..,. ri a � ~q v'� N V ��J . 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J � � � � � wa a � E � � x � �, � � �/ ,[ � o o � � U �. � � ' / u- � 3 X Z Z W C_ � o � < �'� n � I o j � �, x X � J � Z -� j � o �� w = i� W � �I �� — � ~ � � � a �.j � � � �,, > , z m � a� o� �' � _ Q � � p o \` z � S r�1 � a � > X a, ` � • �, �/ F- `o � �, E ,n a o �� ' i-1 N \I � I Z � Z �n N 1 O � O � O � O O Q � U � a a a in � � � � TECHNOLOGY LABORATORY, INC. 1012 Centre Avenue, Suite 101 Fort Collins, Colorado 80526 www.techlabusa.com info@techlabusa.com ANALYTICAL CERTIFICATION "I certify that these analyses and resulting report(s) were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly analyze all samples and accurately report the results. I certify that all analyses were performed in accordance with methods approved for WASTEWATER under the latest revision to 40 CFR Part 136. Based on my inquiry of the person or persons who manage the system, or those persons directly responsible for analyzing the wastewater samples and generating the report(s), the analyses, report, and information submitted are, to the best of my knowledge and belief, true, accurate, and complete." Laboratory: TECHNOLOGY LABORATORY, INC. Address: 1012 Centre Avenue Fort Collins, CO 80526 Project Number: P125-DRMS WQ-MW3 Laboratory ID: D1494 Analyst Initials: TP, DJL, EH Date: 09/08/2025 Laboratory Manager: Valerie P. Meiers I% ��,'_' � � � � t�..� alerie P. 1Vl�eiers Laboratory Director, Acting Technology Labaratory, Inc. Phone: 970-490-1414 � �aboratories ��c � 2040 Savage Road � Charieston,SC 29407 a rneniber of The GEL Group INC 843.556.8171 gel.com September 18, 2025 Dan Lee Technology Laboratory,Inc. 1012 Centre Avenue Fort Collins,Colorado 80526 Re: Radium in Groundwater Work Order: 740834 Dear Dan Lee: GEL Laboratories,LLC(GEL)appreciates the opportunity to provide the enclosed analytical results for the sample(s)we received on September 02, 2025.This original data report has been prepared and reviewed in accordance with GEL's standard operating procedures. The samples were delivered with proper chain of custody documentation and signatures.All sample containers arrived without any visible signs of tampering ar breakage.Containers did not contain sufficient chemical preservation. Addirional acid was added,and samples were placed on a 24-hour preservation hold prior to analysis. Test results for NELAP or ISO 17025 accredited tests are verified to meet the requirements of those standards,with any exceptions noted.The results reported relate only to the items tested and to the sample as received by the laboratory.These results may not be reproduced except as full reports without approval by the laboratory. Copies of GEL's acereditations and certifications can be found on our website at www.gel.com. Our policy is to provide high quality,personalized analytical services to enable you to meet your analytical needs on time every rime.We trust that you will find everything in order and to your sarisfaction.If you have any quesrions, please do not hesitate to call me at(843)556-8171,ext.4422. Sincerely, YT 4 h��L__ Adrian Melendrez for Jacob Crook Project Manager Enclosures GEL LABORATORIES LLC 2040 Savage Road Charleston SC 29407-(843)556-8171 -www.gel.com Certificate of Analysis Report for TELA001 Technology Laboratory, Inc Client SDG: 740834 GEL Work Order: 740834 The Qualifiers in this report are defined as foIlows: * A quality control analyte recovery is outside of specified acceptance criteria ** Analyte is a Tracer compound ** Analyte is a surrogate compound U Analyte was analyzed for,but not detected above the MDL,MDA,MDC or LOD. Where the analytical method has been performed under NELAP certification,the analysis has met all of the requirements of the NELAC standard unless qualified on the Certificate of Analysis. The designation ND,if present,appears in the result column when the analyte concentration is not detecYed above the limit as defined in the'U'qualifier above. This data report has been prepared and reviewed in accordance with GEL Laboratories LLC standard operating procedures.Please direct any questions to your Project Manager,Jacob Crook. �--�Y �IS�I'�J�-L_ Reviewed by Page 2 of 12 SDG: 740834 GEL LABORATORIES LLC 2040 Savage Road Charleston SC 29407-(843)556-8171 -www.gel.com Certificate of Analysis Company : Technology Labaratory,Inc. Address : 1012 Centre Avenue Fort Collins,Colorado 80526 Report Date: September 18,2025 Contact: Dan Lee Project: Radium in Groundwater Client Sample ID: MW-2 Project: TELA00122 Sample ID: 740834001 Client ID: TELA001 Matrix: Water Collect Date: 26-AUG-25 Receive Date: 02-SEP-25 Collector: Client Parameter Qualifier Result Uncertainty MDC TPU RL Units PF DF Analyst Date Time Batch Mtd. Rad Gas Flow Proportional Counting CFPC Gross A/B,Liyuid'As Received" Alpha 9.35 +/-2.95 2.34 +/-3.33 5.00 pCi/L CT3 09/15/25 1421 2857025 1 Beta 9.47 +/-2.49 3.15 +/-2.93 5.00 pCi/L The following Analytical Methods were performed Method Description 1 EPA 900.0/SWR46 9310 Surrogate/Tracer Recovery Test Batch ID Recovery% AccepYable Limits Notes: The MDC is a sample specific MDC. TPU and Counting Uncertainty are calculated at the 95%confidence level(1.96-sigma). Column headers are defined as follows: DF: Dilution Factor Mtd.: Method DL: Detection Limit PF: Prep Factor Lc/LC: Critical Level RL: Reporting Limit MDA:Minimum Detectable Activity TPU: Total Propagated Uncertainty MDC:Minimum Detectable Concentration Page 3 of 12 SDG: 740834 GEL LABORATORIES LLC 2040 Savage Road Charleston SC 29407-(843)556-8171 -www.gel.com Certificate of Analysis Company : Technology Labaratory,Inc. Address : 1012 Centre Avenue Fort Collins,Colorado 80526 Report Date: September 18,2025 Contact: Dan Lee Project: Radium in Groundwater Client Sample ID: MW-3 Project: TELA00122 Sample ID: 740834002 Client ID: TELA001 Matrix: Water Collect Date: 26-AUG-25 Receive Date: 02-SEP-25 Collector: Client Parameter Qualifier Result Uncertainty MDC TPU RL Units PF DF Analyst Date Time Batch Mtd. Rad Gas Flow Proportional Counting GFPC Gross A/B,Liquid"As Received" Alpha 7.64 +/-2.83 2.95 +/-3.09 5.00 pCi/L CT3 09/15/25 1421 2857025 L Beta 8.64 +/-2.37 3.02 +/-2.76 5.00 pCi/L The following Analytical Methods were performed Method Description 1 EPA 900.0/SW846 93 L0 Surrogate/Tracer Recovery Test Batch ID Recovery% Acceptable Limits Notes: The MDC is a sample specific MDC. TPU and Counting Uncertainty are calculated at the 95%confidence level(1.96-sigma). Column headers are defined as follows: DF: Dilution Factor Mtd.: Method DL: Detection Limit PF:Prep Factor Lc/LC: Critical Level RL: Reporting Limit MDA: Minimum Detectable Activity TPU: Total Propagated Uncertainty MDC:Minimum Detectable Concentration Page 4 of 12 SDG: 740834 GEL LABORATORIES LLC 2040 Savage Road Charleston SC 29407-(843)556-8171 -www.gel.com Certificate of Analysis Company : Technology Labaratory,Inc. Address : 1012 Centre Avenue Fort Collins,Colorado 80526 Report Date: September 18,2025 Contact: Dan Lee Project: Radium in Groundwater Client Sample ID: MW-2 Duplicate Project: TELA00122 Sample ID: 740834003 Client ID: TELA001 Matrix: Water Collect Date: 26-AUG-25 Receive Date: 02-SEP-25 Collector: Client Parameter Qualifier Result Uncertainty MDC TPU RL Units PF DF Analyst Date Time Batch Mtd. Rad Gas Flow Proportional Counting GFPC Gross A/B,Liquid"As Received" Alpha 11.8 +/-3.66 3.58 +/-4.14 5.00 pCi/L CT3 09/15/25 1421 2857025 L Beta 10.7 +/-2.58 3.13 +/-3.12 5.00 pCi/L The following Analytical Methods were performed Method Description 1 EPA 900.0/SW846 93 L0 Surrogate/Tracer Recovery Test Batch ID Recovery% Acceptable Limits Notes: The MDC is a sample specific MDC. TPU and Counting Uncertainty are calculated at the 95%confidence level(1.96-sigma). Column headers are defined as follows: DF: Dilution Factor Mtd.: Method DL: Detection Limit PF:Prep Factor Lc/LC: Critical Level RL: Reporting Limit MDA: Minimum Detectable Activity TPU: Total Propagated Uncertainty MDC:Minimum Detectable Concentration Page 5 of 12 SDG: 740834 GEL LABORATORIES LLC 2040 Savage Road Charleston SC 29407-(843)556-8171 -www.gel.com QC Summary Client: Technology Laboratory,[nc. Report Date:September 18,2025 Page 1 of 2 1012 Centre Avenue Fort Collins,Colorado Contact: Dan Lee Workorder: 740834 Parmname NOM Sample Qual QC Units RPD% REC% Range Anlst Date Time Rad Gas Flow Batch 2857025 QC1206221662 740833001 DUP Alpha 5.99 5.89 pCi/L 1.82 (0%- 100%) CT3 09/I S/2514:21 Uncert: +/-2.92 +/-3.04 TPU: +/-3.08 +/-3.46 Beta 14.0 11.4 pCi/L 20.5 (0%- 100%) Uncert: +/-2.83 +/-2.72 TPU: +/-3.63 +/-3.30 QC 1206221665 LCS Alpha 121 137 pCi/L ll3 (75%-125%) CT3 09/15/2514:21 Uncert: +/-11.6 TPU: +/-25.3 Beta 412 464 pCi/L 113 (75%-125%) Uncert: +/-16.7 TPU: +/-77.3 QC1206221661 MB Alpha U 0.0884 pCi/L CT3 09/IS/2514:21 Uncert: +/-0.996 TPU: +/-0.996 Beta U -0.508 pCi/L Uncert: +/-1.60 TPU: +/-1.60 QC1206221663 740833001 MS Alpha 380 5.99 246 pCi/L 63.2* (75%-125%) CT3 09/15/251421 Uncert: +/-2.92 +/-31.2 TPU: +/-3.08 +/-59.4 Beta 1290 14.0 1420 pCi/L 109 (75%-125%) Uncert: +/-2.83 +/-52.7 TPU: +/-3.63 +/-314 QC1206221664 740833001 MSD Alpha 392 5.99 284 pCi/L 14.2 70.9* (0%-20%) CT3 09/IS/2514:21 Uncert: +/-2.92 +/-34.1 TPU: +/-3.08 +/-57.7 Beta 1330 14.0 1350 pCi/L 5.05 l00 (0%-20%) Uncert: +/-2.83 +/-52.5 TPU: +/-3.63 +/-225 Notes: TPU and Counting Uncertainty are calculated at the 95%confidence level(1.96-sigma). 1"he Qualifiers in this report are defined as follows: U Analyte was analyzed for,but not detected above the MDL,MDA,MDC or LOD. J Value is estimated Page 6 of 12 SDG: 740834 GEL LABORATORIES LLC 2040 Savage Road Charleston SC 29407-(843)556-8171 -www.gel.com QC Summary Workorder: 740834 Page 2 of 2 Parmname NOM Sample Qual QC Units RPD% REC% Range Anlst Date Time X Consult Case Narrative,Data Summary package,ar Project Manager concerning this qualifier H Analytical holding time was exceeded < Result is less than value reported > Result is greater than value reported UI Gamma Spectroscopy--Uncertain identification BD Results are either below the MDC ar tracer recovery is low h Preparation or preservation holding time was exceeded R Sample results are rejected ^ RPD of sample and duplicate evaluated using+/-RL. Concentrations are<SX the RL. Qualifier Not Applicable for Radiochemish-y. N/A RPD or%Recovery limits do not apply. ND Analyte concentration is not detected above the detection limit M M if above MDC and less than LLD NJ Consult Case Narrative,Data Swninary package,or Project Manager concerning this qualifier FA Failed analysis. UJ Gamma Spectroscopy--Uncertain identification Q One or more quality control criteria have not been met. Refer to the applicable narrative or DER. K Analyte present.Reported value may be biased high.Actual value is expected to be lower. UL Not considered detected.The associated number is the reported concentration,which may be inaccurate due to a low bias. L Analyte present.Reported value may be biased low.Actual value is expected to be higher. N I See case narrative Y Other specific qualifiers were required to properly define the results.Consult case narrative. ** Analyte is a Tracer compound M REMP ResulY>MDC/CL and<RDL x Subaliquot was taken. See Case Narrative for details. U Analyte was analyzed for,but not detected above the Critical Level. N/A indicates tllat spike recovery limits do not apply when sample concentration exceeds spike conc.by a factor of 4 or mare or%RPD not applicable. ** Indicates analyte is a surrogate/tracer compound. ^The Relative Percent Difference(RPD)obtained from the sample duplicate (DUP)is evaluated against the acceptence criteria when the sample is greater than five rimes(SX)the contract required detecrion limit(RL).In cases where either the sample or duplicate value is less than SX the RL,a control limit of+/-the RL is used to evaluate the DUP result. For PS,PSD,and SDILT results,the values listed are the measured amounts,not final concentrations. Where the analytical method has been performed under NELAP certification,the analysis has met all of the requirements of the NELAC standard unless qualified on the QC Summary. 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Page 9 of 12 SDG: 740834 List of current GEL Certifications as of 18 September 2025 State Certification � Alabama 42200 Alaska 17-018 Alaska Drinking Water SC00012 Arkansas 88-00651 CLIA 42D0904046 California 2940 Colarado SC000 l 2 Connecticut PH-0169 DoD ELAP/ISO17025 A2LA 2567.01 Florida NELAP E87156 Foreign Soils Permit 525-24-281-19660 I Geargia SC00012 I Georgia SDWA 967 � Hawaii SC00012 � Idaho SC00012 � Illinois NELAP 200029 Indiana GSC-01 Kansas NELAP E-10332 Kentucky SDWA KY90129 Kentucky Wastewater KY90129 Louisiana Drinking Water LA024 Louisiana NELAP 03046(AI33904) Maine 2023019 Maryland 270 Massachusetts M-SC012 Massachusetts PFAS Approval Letter � Michigan 9976 � Mississippi SC00012 � Nebraska NE-OS-26-13 I Nevada NV-C24-00175 I New Hampshire NELAP 205424 New Jersey NELAP SC002 New Mexico SC00012 New York NELAP 1 1501 North Carolina 233 North Carolina SDWA 45709 North Dakota R-158 I Oklahoma 2023-152 Pennsylvania NELAP 68-00485 I Puerto Rico SC00012 S.Carolina Radiochein 10120002 � Sanitation Districts of LA 9255651 South Carolina Chemistry 10120001 Tennessee TN 02934 Texas NELAP T104704235 Utah NELAP SC000122024-45 Vermont VT87156 Virginia NELAP 460202 Washington C780 Page 10 of 12 SDG: 740834 Radiochemistry Technical Case Narrative Technology Laboratory,Inc SDG#: 740834 Product: GFPC Gross A/B,Liquid Analvtical Method: EPA 900.0/SW846 9310 Analvtical Procedure: GL-RAD-A-001 REV#20 Analvtical Batch: 2857025 The following samples were analyzed using the above methods and analytical procedure(s). GEL Sample ID# Client Sample Identification 740834001 MW-2 740834002 MW-3 740834003 MW-2 Duplicate 1206221661 Method Blank(MB) 1206221662 740833001(MW-1)Sample Duplicate(DUP) 1206221663 740833001(MW-1)Matrix Spike(MS) 1206221664 740833001(MW-1)Matrix Spike Duplicate(MSD) 1206221665 Laboratory Control Sample(LCS) The samples in this SDG were analyzed on an "as received"basis. Data Summarv• All sample data provided in this report met the acceptance criteria specified in the analytical methods and procedures for initial calibration,continuing calibration,instrument controls and process controls where applicable,with the following exceptions. Quality Control(QC)Information Matrix Spike(MS)Recovery Matrix Spike and Matrix Spike Duplicate,(See Below),do not meet the alpha recovery requirement due to the matrix of the sample.The samples are similar in results. Sample Analyte Value 1206221663 (MW-1MS) Alpha 63.2* (75%-125%) 1206221664(MW-1MSD) Alpha 70.9* (75%-125%) Technical Information Gross A1phaBeta Preparation Information High hygroscopic salt content in evaporated samples can cause the sample mass to fluctuate due to moisture absorption.To minimize this interference,the salts are converted to oxides by heating the sample under a flame until a dull red color is obtained.The conversion to oxides stabilizes the sample weight and ensures that proper alpha/beta efficiencies are assigned far each sample. Volatile radioisotopes of carbon,hydrogen,technetium,polonium and cesium may be lost during sample heating. Miscellaneous Information Additional Comments Page 11 of 12 SDG: 740834 The matrix spike and matrix spike duplicate, 1206221663 (MW-1MS)and 1206221664(MW-1MSD),aliquots were reduced to conserve sample volume. Certification Statement Where the analytical method has been performed under NELAP certification,the analysis has met all of the requirements of the NELAC standard unless otherwise noted in the analytical case narrative. Page 12 of 12 SDG: 740834 p�{��, Groundwater Sampling Field Sheet ��-� Disposal Site Name: � �j� Permit No.: Well/Piezometer: �l� Z Weather: �1 � � � Date: ��7�(p ( �C� Sampler Name: �� Monitoring Well Details Construction Data 1 Borehole Diameter(in): � � Depth to Tope of Screen (ft): Casing Diameter(in): Casing Material: Top of Casing Elevation (ft. MSL): Ground Surface Elevation (ft. MSL): Field Observation Locked: Yes ❑ No Before Purging After Purging Before Sampling � Depth to Water Level(ft.): Water Elevation (ft. MS�): a; Screen Submerged?(Depth to Water Level< Depth to Top of Screen) ❑Yes ❑ No Start End Purge Date/Time � �, Wel)Conditions Commentary: Samp ng Equipment(check one) Pump ❑ Interval Sampler ❑ Bailer ❑ Other(specify): Equipment Name&Description: Pump Types(check one) ❑Submersible eristaltic ❑ Bladder ❑ Inertial Lift Pump ❑ Other(specify): Method (check one) ❑ �ow Flow ❑ No Purge [�urge Options(check one) ❑ Dedicated ❑ Disposable �ortable Decontamination Method: Field Analysis Final Reading u Date/Time / /; Depth to Water(ft) �. Volume Purged ( ) \ Temp(°C) � Sp.Cond (umhos/cm) ��( pH DO(mg/I) � ORP(mV) � Turbidity(NTU) Equipment Depth: Flow Rate: —�� Volume Removed: Volume Sampled: Odor? ❑Yes [�'� Color? ❑Yes �� Comments: 07/2023 cmc DNR Form 542-1322 � �p Groundwater Sampiing Field Sheet = } Disposal Site Name: � �5 Permit No.: _ Well/Piezometer: M�� Weather: e Date: �— 2,�j Sampler Name: ��V��NTt�, �-2�1.U� Monitoring Well Details � , Construction Data `` Borehole Diameter(in): � Depth to Tope of Screen (ft): Casing Diameter(in): Casing Material: Top of Casing Elevation (ft. MSL): Ground Surface Elevation (ft. MSL): Field Observations Locked: �Yes ❑ No Before Purging After Purging Before Sampling Depth to Water Level(ft.): Water Elevation (ft. MSL): 2 � � L"+ � Screen Submerged?(Depth to Water Leve)< Depth to Top of Screen) ❑Yes ❑ No � G Start End � � Purge Date/Time � � �' � � . Well Conditions Commentary: Sampling Equipment(check one) �mp ❑ Interval Sampler � ❑ Bailer ❑ Other(specify): Equipment Name& Description: Pump Types(check one) ❑Submersible Q Peristaltic ❑ Bladder ❑ Inertial Lift Pump ❑ Other(specify): t f Method (check one) ❑ Low Flow ❑ No Purge urge Options(check one) ❑ Dedicated ❑ Disposable ortable G Decontamination Method: Field Analysis Final Reading F r� Date/Time /� ); � Depth to Water(ft) , . I� % Volume Purged( ) � Temp(°C) j I Sp.Cond (umhos/cm) / �� pH �, �; DO(mg/I) � ,' ORP(mV) �; Turbidity(NTU) � h Equipment Depth: Flow Rate: (� .�� Volume Removed: Volume Sampled: � �z Odor? ❑Yes �No Color? ❑Yes No ;. Comments: 07/2023 cmc DNR Form 542-1322 Adequacy Review No.2 Cogburn Sand and Gravel(M2025-016) Page 1 of 4 December 19, 2025 Patrick Lennberg 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, New Permit Application, Adequacy Review No. 2 Review Memo, File No. M2025-016 The DRMS reviewed the responses to the preliminary adequacy comments, submitted to the DRMS on September 12, 2025, for the 112c permit application for the Cogburn Sand, Gravel and Reservoir Project, (Cogburn), File No. M-2025-016. On November 10, 2025, the Applicant received follow-up questions in the form of a second adequacy review letter dated October 15, 2025. The original comments from the October 15th letter are replicated below, with our responses outlined in blue text. General 1. Monitoring well MW-6 is in an area that is to be backfilled. Please discuss how MW-6 will be maintained throughout the life of mine. The location of MW-6 has been field-verified and updated to the correct location, which is outside the footprint of pit P125_S1 with a setback of greater than 20 feet. The location has been updated on the attached map Exhibits C-1 Existing Conditions and C-2 Extraction Pl�n, as w�ll as ihe �d.iache� pr��nd.iom��•ic maps. 2. The analytical results provided are confusing. It appears that there were samples collected twice during the fourth quarter 2024.A primary and duplicate sample from MW-3 on 11/13/24 and there are field parameters for that day although it is unclear when these parameters were taken, at the beginning or end of purging, and the purge volume is not clearly indicated?Then there is another sample that was collected from P-125 on 10/31/2024 but there are no field parameters associated with this sample nor is there any indication where this sample was taken. A response is required. Summary tables of all groundwater quality samples and their respective field parameters are attached to this memo response. A purge volume was not recorded for the November 13, ?024 sampling event and cannot be verified. Field parameters were not collected during the first sampling event on October 31, 2024 due to a misunderstanding of groundwater monitorin� and reporting requirements. The �P��in c�f��st�dy from �ctober �1, 202.�- indicates that the s�mpfe was collected from MW-2. Parameters were taken at the start of purging for the 2024 Q4 and 2025 Q1, Q2, and Q3 sampfing events. Per DRMS guidance, field parameters will be tal<en prior to purging and after every canE� well volume purged in subsequent sampling events. Adequacy Review No.2 Cogburn Sand and Gravel(M2025-016) Page 2 of 4 3. For the 1Q2025 samples were collected from MW-2 and MW-3. While field sheets were partially completed the only field parameters provided appear to be from a notebook completed separately. The total purge volume for MW-2 was 3 gallons which appears to be correct for a 3 well volume purge. However,for MW-3 the purge volume was also 3 gallons for 3 well volumes but a review of the construction logs indicates that close to 4 gallons need to be removed to complete a 3 well volume purge. A response is required. �, surr5rr5ary �i�II iicld �,�rarn��ers cc�Vl��,l��l is uncQud�d �s ��a� ��tGchrn�r�� t� this merr�c� res�ac�ns�. All field parameters for future sampling ev�nts �ill b� rpc�rdec� on on� c�esi�na��d �ro�ndw�t�.r sarnpling field shee� fc�r �ach aneell ��mple�R. '�`�I� purge volurr�es vvPr� cc�nservatively �al�u��t�c� �S�sed �r� the vv�ter �alumn (measu��? ciPpth to well bottom minus the minimum depth to groundwater); these depths are listed on the attached piezometer summary table. The in-well water height and piezometer diameter (1 inch) were then used to determine the water column volume from Table 3.2.1 of the Groundwater Sampling Guidance (EPA, 2013) linked in DRMS's 2024 Groundwater Monitoring Guidance. For example, MW-3, a 1-inch diameter piezometer, has a measured well depth of 26J8 feei �nd a minimum measured depth to groundwater of 7.36 feet, for a water column height of 19.42 feet. Using Table 3.2.1, multiply 19.42 feet by the volume factor of 0.12 gallons/ft, for a to��l three-well purge volume of 2.3 gallons. Similarly, MW-2 was determined to have a purge v�lu�n� of 2.5 gallons. 4. The field sheets for the 2Q2025 are not completely filled out.The sheets indicated field parameters are collected at the start of well purging yet the sheets show that 3 gallons have been removed, please clarify.Again, based on a review of the boring logs and well construction diagrams it does not appear that a sufficient well volume was removed from MW-3 to equal 3 well volumes.Typical volumetric well purging practices are to collect field parameters at the beginning of purging then approximately every well volume,when three successive readings have reached stabilization,the sample(s) are taken. A response is required. Successive field parameter readings to indicate groundwater quality stabilization were not collected due to a misunderstanding of field protocols. All sampling events moving forward w�ll collect field parameters prior to well purging and after every one well volume purged. 2025 QJ groundwater quality sampling was conducted prior to reception of this comment memo. Well purge protocols will be updated for the 2025 Q4 samplin� �vent. See response to Comment 3 regarding well purge valum�s. 5. A summary table of sample results needs to be created that compares the analytical results to the relevant Regulation 41 standard and any exceedances highlighted. A review of the laboratory data supplied showed some exceedances of the relevant standards and it appears that Nitrite+ Nitrate as Nitrogen was not sampled for. A results summary table is attached to this comments response memo. A representative of the laboratory used for analysis, Technology Laboratory, Inc., informed Raptor Materials that Nitrite + Nitrate as Nitrogen is equivalent to the sum of the individual analyses, which have been run for all quarters sampled; the summation is presented in the summary table. Adequacy Review No.2 Cogburn Sand and Gravel(M2025-016) Page 3 of 4 Groundwater Monitorin�Plan Review 6. In Section 2.3 Chemical Analysis, the groundwater quality monitoring plan is only for one well, a compliance monitoring well, sampled five times on a quarterly basis,this is insufficient.The Applicant needs to collect groundwater quality samples from all site monitoring wells, 6 wells total,for 5 consecutive quarters prior to affecting groundwater.The Baseline Groundwater Quality Report shall be submitted as a TR to designate the point-of-compliance, revise the analyte list and the frequency of monitoring as needed. R�ptar I'�lE��rial� rn:�� vath P�tric6� L�n�b�r� ai th� C��MS on �lovernk��r :la', �C➢2!� tc� e�r��lu�i:� groundwater monitoring requirements and the sufficiency of existing baseline groundwater d�t� for the P125 Cogburn site. For a homogenous site with typical geometry and uniform grour�dvvater flow direction, two groundwater quality points should be sufficient to capture baseline data. However, the P125 site has elongated geometry and a non-standard groundwater flow regim�, with a ridge approximately west-east through the center of the site; groundwater to the northwest of this ridge flows to the Saint Vrain Creek, and groundwater sautheast of this ridg� flaws towarc�s the offsite Raptor properties (Heintzelman and Bearson). 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. MW-S has been irreparably damaged by farming equipment; once it is re-drilled, it will be sampled for groundwater quality. MW-4 is located far enough from the proposed permit area that it will not be considered in the baselin� groundwater evaluation. Raptor Materials will contact the DRMS following receipt of groundwat�r quality data at MW-1, MW-6, and MW-5 to determine the sufficiency of existin� da�� nd fi�a establish a point(s) of compliance prior to groundwater disturbance at the site. 7. Monthly groundwater levels,from all monitoring wells, will continue to be collected until the completion of reclamation when water levels will be collected quarterly. �,c!<nc�anrledged. 8. Based on the submitted groundwater potentiometric maps, MW-3 sits at a high point in a groundwater divide where groundwater either flows to the north or to the south it does not appear to be a suitable location for a POC well. A response is required. Du� io the grc�ur�dw�t�r c�ivid�, ii is lil«ly ti7�ai tw� p�int of c�rnpliance vvells will nee�l to be established. Based on the observed potentiometric data, Raptor Materials proposes �� sel�et MW-2 and MW-6 as points of compliance. As of this memo response, four quarters of groundwater quality data h�a�� b�er� s�Abmi�ttec� fi�r ldPe�+J�2, �'��6nd��a�� q�s�Eatyr a��le�si� v,�i�l begin at MW-6 in Q4 2025. 9. In Appendix B,QA/QC,it is stated that duplicates will be collected one per 20 samples.A duplicate is required one per event, please update. �4c�<r��vvV��b�� rc1 a��r�a��, Adequacy Review No.2 Cogburn Sand and Gravel(M2025-016) Page 4 of 4 10. The well purging procedure needs to be more descriptive to include, at a minimum, the frequency that field parameters will be collected,what the field parameter stabilization criteria is, and how the purge volume is calculated for a given location. See respc�nse to Cornrnents 2 and 3. Stabilizaiian accurs when, for at least thre� cansecufive measurements, pH, specific conductance, and temperature vary no more than approxima��l� 5 percent. The Groundwater Monitoring Plan has been updated to include purge volume determination and groundwater stabilization criteria. 11. Completed field sheets need to be added to the list of items expected in the quarterly report. Acl<nowledgeci and add�d. Groundwater Model Review Corolments 12 through 14 pertaining to tl�� grc�und�r✓�t�r rr�odel ar� �ddr�ssec� ir� a s�r�ara�� rrierr�+� by AWES dated December 19, 2025. �f ` ��. COLQRADO =e ;;#' Department af Public ��s=6-' Health€r Environment Dedicated to protecting and improving the health and environment of the people of Colorado CERTIFICATION TO DISCHARGE UNDER CDPS GENERAL PERMIT COG500000 DISCHARGES ASSOCIATED WITH SAND �t GRAVEL MINING AND PROCESSING (and other Nonmetallic Minerals except fuel) Certification Number: COG502233 This Certification to Discharge specifically authorizes: Raptor Materials LLC to discharge from the facility identified as P125 to: St Vrain Creek Facility Located CR 28 and CR 17, Platteville, Weld County, CO 80651 at: Center Point Latitude 40.19415, Lon itude -104.907669 Defined Discharge Outfall(s) Discharge Outfall(s) Outfall(s) to Lat, Long Description Receiving Stream MGD Surface Water 40.191224 Mine Pit Dewatering and Roadside Ditch 001A -104.904482 commingled stormwater St Vrain Creek 4.42 40.195454, Mine Pit Dewatering and Unnamed Drainage 002A -104.913685 commin led stormwater St Vrain Creek 1.93 All discharges must comply with the lawful requirements of federal agencies, municipalities, counties, drainage districts and other local agencies regarding any discharges to storm drain systems, conveyances, or other water courses under their jurisdiction. Crushed Stone and Construction Sand and Gravel Facilities (SIC Codes 1442) Permitted Feature ID: 001A and 002A Permitted Feature Type: External Outfall Limit Set: 2 Discharge Limitations Monitoring Sample Maximum Concentrations Frequency Type Parameter Units 30-Day 7-Day Average Average Daily Max. Flow', 001A MGD 4.42 NA Report Continuous' Recorder' 50050 Flow', 002A MGD 1.93 NA Report Continuous' Recorder' 50050 pH, (Minimum- Maximum) s.u. NA NA 6.5-9.0 2x/month Grab 00400 Total5uspended Solids, mg/l 30 45 NA 2x/month Grab 00530 Oil and Grease Visual NA NA NA 2x/month Visual2 Page 1 of 2 I�� 84066 Oil and Grease, mg/l NA NA 10 Contingent2 Grab 03582 1: Flow - The chronic flow limit is equal to the flow rate provided in the permit application and will be stated on the certification. If power is not available, flow may be measured on an instantaneous basis. 2: Oil and Grease: - A visual observation of the discharge for each permitted outfall must be made 2 times per month. In the event an oil sheen or floating oil is observed, a grab sample shall be collected, analyzed, and reported on the DMR. In addition, corrective action shall be taken immediately to mitigate the discharge of oil. Certification issued: 10-10-2025 Effective: 10-10-2025 Expiration Date: 12-31-2021 The �eneral permit COG500000 expired 12/31/2021 and is administratively continued. This certification is also administratively continued. It will remain in effect until the general permit is renewed or other actions are taken. This certification under the permit requires that specific actions be performed at desi�nated times. The certification holder is legally obligated to comply with all terms and conditions of the permit. Approved by Emily Mortazavi Industrial �t Natural Resource Extraction Permitting Unit Permits Section Water Quality Control Division Page 2 of 2 I el� � . � /� �� '�`�� LEGEND . � 25867-F-R / � �� I / ,�:```'��''` . - �I � Y: ; -�:≤:�' XXXX EXISTING MAJOR CONTOUR 5 � ❑5 270' NORTH 1 I I �� - ,rt A?=�'r`�;;��•<<'� .• :.; ;i. j : > :w�. I I � I � � �� EXISTING MINOR CONTOUR � �.:. , 120929200049 � ��" � • ' ��:��_ = ..... f .:�`�;::: � 120929100050 � i ia'nf�. � • . 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IP � P E T P R - -- � ❑ H A S ACK �f'E"LL E D E B E � J . � > I ��f''.�i:�-"��:�r",�`:r'..�:`.��:.`:'`�.: � \ COUNTY 3-.3-70- �l� •J l � C9 � :r��* . c '.`�� Y�ZO CODE 2 E �. I �:�;'��=S7`rz,.:: 1 / !' is 1 I _ � � O C O O > .- .�'�� - � � .. / . \;3 - •• GA MAIN EXI TIN i ( c� � � S - S G zs ,�� / G i i � �� !/ . '� �J� J � �� O �� / �. � . .� / ,.:t.� I � �` .6�`'a _ \•'` � \ • � � I � .��:`��•�--� W WATER MAIN EXISTING l , cH�oeuizN �r��z�z�N r�zuE � ��/ .:::�,,.,.,.=�.`�' � o � . 5 . . :,�� _ � � < . . . ❑ � o > . � , I i . \ . . �� . v . 16�I 1 O�� \ � ,� 23 ��O O �� , 1 � .+�;; STRUCTURE ADJACENT OWNERS-WITHIN 200 FT - - RI G HT-OF-WAY L I N E � � Q� O. � 1\\O } � � �'I �;;;:;' / �"ti��"":i'�..;�:� NUMBER STRUCTURE OWNER - - � '-:, ' i ,3 � �, � ,;y •�•:, PROPERTY LINE II _, 15, OGE Of CAT TAil,5/POND � A1 :�=�:�;�; UNPAVED ROAD. FARM FIELO. CULVERT � � � J ,� � � 333293- > � � • . 'I ,��,;:7;�,�:: 1 PIPE, DIVERSION STRUCTURE, ACORD ST VRAIN VALLEY RANCH LLC OVERHEAD UTILITY LINE I I , �� O.` - �� . / s / — IRRIGATION DITCH I r , O C 333� .rJ.rJ— 150 iYEZL HEAO SETB.4CK PER 333292-?� � r / ' �F `' Y� �:i-.� COMMERCIAL/RES�DENTAL BUILDING, STREET- EXISTING - � <'",:;�,.,.. 2 COLLWS ROBERT ALIEN � . � ,/`j C` 120929200028 C _ �YE"LO COUNTY CODE 29-.l-70-E � � G �' ' 333153- , / , . / ' , ,:,, p� '/Q ,� MW 4 �, _ / . ,; UNPAVED ROADS, FENCE/GATE / / I � � MW 2 7025 .;..,..::,;�.:_,,,�,: � � ��, � IISR-COGBURN�-��I� Ti9 / 333294—�� "j�� ',/ 3 UNPAVED ROAD PIRESTONE TOWN OF , � , � , FLOODPLAIN � � �_ / 6O �O� ��. 7�27 1 / ��..�.�.cvNwi�N�-1��nU C�� '� � / I ... , 4 � ,r�,r UNPAVED ROAD lG EVERIST INC p ;` ��,��. C' � J`� ��'� __ HSR-COGBURN 7-Z9�PfiJ �\ � . -- � —� . � � � coMMERc�A _ _— � _` _ __ � _- ,r , L BUILDING, UNPAVED RIVERBANK ;, ,. ...•.. ^ � N - � - V � HSR-COGBURN3-ZI(Pfll --- :� ._'--�-'25 ^� , ,., "J`-„"'�° • `-• �-J'/ � � � I � � .�I I '''�`'' 5 ROADS, CUIVERT PIPE, POND, GAS PLATTEVILIE DAIRY LlC � � J rn D � /DO ,. ;.,> zo � - � `°: z6 , r��F��N :� ' ' ---• ' • .� . .4'� ','z.'4 '<Y`,`.\,::,•...4 LWE, FEr,ce —...—...—...—...— DITCH FLOWLINE N . . � � /�� ij - � ; _.. -- '" � � 28 Zg . � � Z`'P _ E 2/GHT-OF-IX�H)" - �� 15 � 6 :a. / . - Q� Q� J �� ' n _I� � /i ` , - ��. 2ECEPTIONNO.ZS5042/ � � "' `� � � � / � � ` � :•. " / UNPAVED ROAD, POND, FENCE/GATE, o . � � , ...25 ...,.. ----._ 1 . 26 , ;o , . :=�-•:•. _ ;'A �:..�'� -------------------- LAST CHANCE DITCH BOUNDARY / �,Q \ (� HSI�COGBURN 4-�9�P�� ' 'j p 2s � � �I � �� "� 6 FARM fIE GAS LINE. RAPTOR MATERIALS LLC c� , �., �., �.l C � "�� " nvEl/DiRT aCCESS , � � � . ' � ..,.�.s��:;; <�;`a�� 120929000047 _ -,., ,� • 333295— �a � p I� • - DWATOER WELL. O O O O a�'C� v , ' S - . _" ' Pfi r . � , / � - '"� ' -- , � ...�...:.,,. , ' /y,, L � � l � -- , �- i O O O � � - . -------------------- 20 FT PROPERTY/EASEMENT . / � i � `:�.�`�'�;�'.. OL N��UNIT I Sl / `"a � — ',,:_ ,- . ........., . ,.. ....,,....,:�.:•:- , ...;,.; � .....:.. . �::.�;:..::. .•........:.;.,�. . .... ,�..`-�"�'�.:..'-:,��:.:-.-..-:„'-:h`��4 '�, � �*' FENCE GATE UNPAVED & PUBLIC � O O o . / , ��- `-� � ��: � ( l � / i i � . ,.. �� SETBACK _ .�� I . -- ��C j�� i C \-.•� O ' / � / � II ' � ...;.,.• ,�-'^' '+"• - 7 READY MIXED CONCRE7'E COMPANY � I �- �� \N C'R� � � � , IX�i1 R�CN POOL�NG UNIT J Pf� �� (' � � � � I � �'''' I - ,�; ROAD. FARM FIELD. WATER WELL I .. :. / •.;.:r;:.�. �-� / I�� -- ��'� S'`,v� _,, � � ` � J ;� I 23 � / � i//O .�� / �/� �/ I ; � '� ��r .'., ��'fV MINING/EXCAVATION PIT, UNPAVED VEGETATION BOUNDARIES I , ._ 26 ' � - 24 � I .` I�,r �.`:u�` 8 PASQUALE VARRA . - .' , : O _ O _ � , �. - HfS2 COGL3URN 4-Z9 G �� C / •'f`'*`.'y, � � C'�",.�.r ROAO � ; %�... �_ !'�. 16 � � / � I /. .r / f I :. , �/�•�� •�y '< DO -� 1 - 23 ,�.`\ 22 WALE !� j' j/ I I � - -�`'.' 9 IRRIGATION DITCH LAST CHANGE DIiCH COMPANY �� ALFALFA FIELD �.= � ��s�� l � �_;... - - / i � �ii�r , : � . � d � . �, p � GBURN 5-Z9 Pfl �,. ��, � � I / g , /" �� < 20 20_ `� / \ ; "`. . 18 �i� / � J . / . ' _ / 10 TANK BATTERY FACILITY KERR-MCGEE OfL & GAS ONSHORE LP. _ _ _ � :.:. .� : ,R;�':.:�: ,--, . fi O C' I ��/ . �� I ' •' ' '".','`.�� /•• UTIUTY POLE, OVERHEAD & ' �' `'' �' `� "' � �� `"� GRASSLAND / C _____- , , �\ _ - /�N��OGBURN C�Z�J S� 23 �• j ��a �� .; ::Y,: "' �.' 17 UNDERGROUND ELECTRIC, ELECTRIC UNITED POWER W W W W v, % - / � �� ` � . 150 iYELL HEAO SETB.4CK PER '�,� .� �� Ti� I � ��.�' BOX — — — — 6 < J �YFLO COUNTYCODE2.�-3-70—E ❑ �' � � \ � . /• / �.;: 29 UNDERGROUND COMMUNiCATION LWE, cENTURY uNK P R A I R I E D O G C O L O N Y 1 � Z 8 J. � �� C O M M U N I C A T I O N B O X � ^-.A � �� O . _ \\/ �� ` 25 I �J 30 UNDERGROUND WATER MAIN CITY OF THORNTON l � HSl?COGBURN 5-z9/P�9J ` / •,zs � � � /.;' .' � r� � �� ,� 333296— � �.� i � �. 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" —__ - / � \� — . _ . _ . — � �m"�"�Q�^(�J — � — �E��— � —`—`--'=_—==-- � .• / ;� ONCRETE TROUGH �, OIL & GAS FAC�LITY�EOUIPMEN7 E ELECTRIC SERVICE • \� 16 �� g � '� � � r �/ , � �� ,� � / ONCRETE BOX �y rl ' �� . . � � � _ � .� � - �- � .. , � . � � , , �� 16 - 96 :t�. - .> ,' . : \ I ,. - _` � -_ � � >. . � I � . � �10 7"23 i . -- - - -r^---=- - -zr - -. •... � .�-.��;':.. ..�,...:t;a.._��i��^ •• �,.^: . �:.g 20 POND -� • � �i 1 �� . ;; . ,$ � .. � • �,� Ss POWER POLE � � . 14 f �'-e;=' 21 BUILDING I � " 10 � Z� ! .' "� ' 22 GAS LINE KERR-MCGEE GATHERING LLC . / . � � i �,�.. � W . �� ,� � Z4 � ,5 � S,� /:,-;,�:.�::= O0 WATER WELL � . � � � � . � � , •. . - � , � l � `�.-� ...� •� � Z� I 23 GAS/WATER LINE PANHANDLE EASTERN PIPELINE COMPANY � � G�'/ '� � ,� I f' 9 `" � �" _ 33 .• 333�52- � / '$� ��29 6 2q GAS UNE RESOURCE GATHERING SYSTEM, INC. E R < I / I . j� I fI ._. �:.. ..... ... .. � . . MW-1 70 r ` ,i ;� _ � I.r , �� . . : .....:..,..... _ ..., .•..k�:...... �/ �� \ ��/ �I . ` � ,� ,3� 23 . i .;�� P::;�,�,.�.-. :�,•;,. w WATER MARK � '�S ;�\ � I I 25 GAS/OIL FACIUTIES, FENCE KERR-MCGEE GATHERWG LLC �_`�'4.,X W�W,; �� . r „ : 14 � I " ": 33 UNPAVED ROAD KERR-MCGEE ROCKY MOUNTAW CORPORATION e WATER METER � I . r � v 1-� . 2� 14 � _ � ��'..� - K6/ZR MCGEE ROCKY �� ' � // 12 ..� • � fq �� , , � 13 „ MOUNL9/N CORP � ;� �� /� � ��/,� ��.` 26 OIL/GAS FACI�ITIES (PA,TA or ACTIVE) KERR-MCGEE OIL & GAS ONSHORE, LP � � 16 I � � � �I � � /iCCESSROfiD � f( 27 � ATER OiVERSiON STRUCTURE 27 IRRIGATION DITCH LAST CHANCE DITCH COMPANY � WATER VALVE . � �� r -� ��••'. . . RECEPTIONNO�Z934956 ``� " " �� 13�� 30 � ' 34 � 1 - I � � �� r 13' / � // ' ; 28 WATER WELL OCCIDENTIAL PETROLEUM (RIEMER, JOSEPH) i � I . � ,. ' / � �,� / � 1 � :: ''1 GAS MARKER � / � O/ � �� ' � ; ' / ' i/ ./ � •' ❑6 31 GAS PIPELINE SNYDER O�l. CORPORATION � \ I /// / �� RAVEI/DiRT ACCE55 � _ // .�� 12 :: � )I J � `� - � \ � , / / �� Zi , X� /� � :, 32 UNDERGROUND WATER MAIN CITY OF THORNTON GATE i /.. // ^ /� 23 � �i `�j /� � %�.,(� I I� ( ,� 34 PUBUC ROAD WELD COUNTY DEPT. OF PUBUC WORKS � /'� J -SUBJECT PROPERTY- .�. � /. , /// �� I�Y/HI�REIV Z9-9 L�T�iJ� �� `� I ''` Y�f POST \ i � 196.4I ACPCS �� / � � 26 � � ��/ � � I I =� SURFACE OWNERS OF RECORD FOR AFFECTED&ADJOINING LANDS I � / (±8,555,650 sq.ft.) �� / / � � � : �/i �� :a,:� � :r�'; i � . / / 1 I�/ /� 3 g :, COUNTY TAX ID PARCEL OWNER OF RECORD ADDRESS CITY STATE ZIPCODE I ' � /.'� . I J� � �� ' t�=�- 120928000002 � /� � , , 120929100052 �` � ��. // , � i'//: � � I df i� 29 120929000026 ACORD ST VRAIN VALLEY RANCH LLC 7541 COUNTY ROAD 26 3/4 LONGMONT CO 80504-9 51 4 �,I___'_ �� . � . � �„_ /./ ; J J/� � � ,,12 ; �� ..".. 120932000030 ACORD ST VRAIN VALLEY RANCH LLC 7541 COUNTY ROAD 26 3/4 LONGMONT CO 80504-9 51 4 �_>� .,.. / I � .i�12��EN�9 IOL�Pfl� G� �" \ `� ; fc/ r� \� ._,,3 �j�j I � I � � Y_ 720929000025 ACORD ST VRAIN VALLEY RANCH LLC 7541 COUNTY ROAD 26 3/4 LONGMONT CO 80504-9514 ;... � � >> � /� ' '� `r • �" � 3�` 120929400051 COLLINS ROBERT A�LEN 13187 COUNTY ROAD 17 PLATTEVILLE CO 80651-9105 O L. / : 150 {f�"LL HEAO SETBACK PER - 2�� /�S�' I � � . �YfLD COUNTY CODE 29-3-70-E '� /�/ � � 120929000047 FIRESTONE TOwN OF 9950 PARK AVE FIRESTONE CO 80504-7820 ( �': � � %�P I 25 PLUGGEO&AB.4NOONEO � , \ � / �: �r J� /�� I � � " �•?�;� 120929000046 LG EVERIST INC 350 $ MAIN AVE STE 400 SIOUX FALLS CO 5�104-6312 � �� I IS�LL HEAD SETB.4CK PER �� i� �� / // i � P i T H :` I � iYFLO COUNTY CODE 23—.3-70—E � i" � � r� / '' {�t�I s� 720929000050 PLATTEVILLE DAIRY LLC 1919 14TH ST STE 300 BOULDER CO 80302-5321 / , � (Typ��.A�J �- �i`�I��E N Z 9-I 0 L(�i`�l \ \ � �`� / / ,� �� I � I � tl :� 120929000048 PLATTEVILLE DAIRY LLC 1919 14TH ST STE 300 BOULDER CO 80302-5321 . / i �� 26.� J �" � 11 \/// � ,%�Z � �� 1 : 120929000049 PLATTEVILLE DAIRY LLC 1919 14TH 5T STE 300 BOULDER CO 80302-5321 . \ / )� % �3 � (� / / �$ 1 � I � I ' ; 120929000033 RAPTOR MATERIALS LLC 8120 GAGE ST FREOERICK CO 8057 6-9439 � I �� _ � / � � \ �� \ C / � � / / �/� '� I so I :a� I'; 720933200003 RAPTOR MATERiALS LLC 8120 GAGE ST FREDERiCK CO 8057 6-9439 / � / � �5 \ \ // , / / � � � � �� 17 � 120928040002 RAPTOR MATERIALS LLC 8120 GAGE ST FREDERICK CO 80516-9439 \ � � I C� 3� � �- �� _ � / � � 50 PERMANENT THORNTON � I is � r� �� j� � �Y�iTERL/NE EASEMENT �� 120929100052 RAPTOR MATERIALS LLC 8120 GAGE ST FREDERICK CO 80516-9439 , ;� ATT AR „ �� „ �, , o � � � � �, :�/ � � ,- 120929240028 RAPTOR MATERIALS LLC 8120 GAGE ST FREOERICK CO 80576-9439 ��i 333154- � ; � .�� 16 � � �� "` � fIC�RD CHf1�BURNUNIT� 1�f1 � J, ,�Gi / 40 LC.E. FOR THORNTON I 3a � ;, 120929204057 RAPTOR MATERIALS LLC 8120 GAGE ST FREDERICK CO 8051 6-9439 � M W-3 7029 I 25 PLUGGED&AB.4NDONEO � � � �` j �/ / /� {yqTERL/NE EASEMENT I 120929000025 \ I I U iYFLL HEAO SETB.4CK PER ,%%�J �j,: /� `/ �� ' � �.I »";60' RIGHT—OP—WAY PER 120928000006 READY MIXED CONCRETE COMPANY 2500 BRANNAN WAY DENVER CO 80229-7029 � � I � �YFLD COUNTY CODE 29-9 70 E � � � Gi / �� I j ROAD FILE 100/134 120932101003 PASOUALE VARRA 4704 HARIAN ST, STE 250 DENVER CO 80212 '\ /' / �y � � i� �/ / � � I ,:"'BOCC RECEPTION No. 18820017 I /'� i� � � � 26� J �� V`��j � / �'� I � �`BOOK 48, PAGE 237 ��F� � A, � � 3 � �� , �� * � � ��/� �� 15 6 RIGHT-OF-WAY(ROW) ANO EASEMENT wiTHIN AFFECTED IANDS I \��. \ I ��U O n ��%16 �j �� '- �� 1' / �2 / '� � ��P�� " // I � I ,I II ;: RECEPTION ///ID OWNER: EASEMENT - ROW AD�RESS ADDRESS CITY STATE ZIPCODE TELEPHONE #: , � � - � � \ ' �' / /��j �/ 11 � � 1 � 18820017 WELO COUNTY DEPT. OF PUBUC WORKS CURTIS HALL, DIRECTOR P.O. BOX 785 GREELEY CO 80632 970-400-3750 X 3750 � � �� ' ,�2`�� . � /� , � � o V :, � � � a.i' �� \ \ � / ��/ / % I , * �7 Zg 6 3806206 KERR—MCGEE GATHERING LLC ATTN: RIGHT OF WAY DEPT. 1099 18th Street, Suite 1800 DENVER CO 80202 I \ O �il � " �3 � , / Z3 /�i � / // j �Z � + 1679354 PANHANDIE EASTERN PIPE LINE COMPANY ATTN: RIGHT OF WAY DEPT. 8112 WESTCHESTER DR., STE 600 DALLAS TX 75226 . ❑ � 13� � /// / \ �j- � �� \ \ \ / ��/�� // fr� R T TR T R � F � .:�- � 1629907 PANHANDLE EASTERN PIPE LINE COMPANY ATTN: RIGHT OF WAY DEPT. 8112 WESTCHESTER DR., STE 600 DALLAS TX 75226 800-275-7376 � \ / � .. _ // . I� \ / . . I / 6 ii W T H T R R T - - AI�_ 1 1 PA HA A T RN PIP I PA Y ATTN• RI HT F W Y PT 8 3 ES C ES E D 5 E 600 A A TX 7 7 7 7 77 � � / � '. ;,?- 66325 N NDIE E S E E LNE COM N . G 0 A DE . . D lL S 522 800 2 5 3 1 / : � ^ � is �w�..,.,..„., C '� O / / � i I � / ; � a.. .�. ._, .... .,..:._.... ..... . -..--•,.°_?,.,,.;., \ �—�' �--� ' �3 �" " 12 / /� � % I � I 1832625 PANHANDLE EASTERN PIPE LINE COMPANY ATTN: RIGHT OF WAY DEPT. 8114 WESTCHESTER DR., STE 600 DALLAS TX 75228 800-275-7378 -,---� � - . - - / �_: . .._� O '� i � �.,� // ///�� %� 11 % � I � � ' ,.4 .. .. - . . . - - 16 16 1 � �' . � 1961825 PANHANDLE EASTERN PIPE LWE COMPANY ATTN• RIGHT OF WAY �EPT 8115 WESTCHESTER DR. STE 600 DALLAS TX 75229 800 275 7379 / � I . ^.'�"�,?.,:`;'. �•'.�:c:. 1 \ / / • ` �$ // /��j l�°iST Cl�i`{NCE DITCH <%" �/ { ,. ,' .; ':.`. ::?•.' 2550421 RESOURCE GATHERING SYSTEM, INC. ATTN: RIGHT OF WAY DEPT. 1999 Broodway, Suite 3600 DENVER CO 80202 . . • � . ' /� i i � NO RIGHT OF IX/�9 Y � I i f , .. ;'.:T�,o^,,,-'.,;,..�. � � � � t � 2402534 SNYDER OIL CORPORATION ATTN: RIGHT OF WAY �EPT. 777 MAIN ST„ STE 2500 FORTH WORTH TX 76102 817-338-4043 � . � �'` . _ �❑ � � �� DOCUMENTS Pl?OI/IDED OR � .�i � � ; � \ � % ' �� / � � �� /' C 2552512 HS RESOURCES, INC. ATTN: RIGHT OF WAY DEPT. 3939 Carson EVANS CO 80620 303-296-3600 I ' � ' ' ❑� . / �� DISCOI�EREDDURINGRESE�IRCH �� I �:�.� ( OLLINS PROPERTY KERR-MCGEE ROCKY MOUNTAIN - ' � ` / / / / HIST�I�I�-l�lGHrs�l�l��Y �/ � � � •. ACCESSORY BUILDINGS 2934956 ATTN: RIGHT OF WAY DEPT. 1099 i8th Street, Suite 1800 DENVER CO 80202 / CORPORA TI ON /�� / � -' //12 � �'�.� ,,:,. ' / / �� / � � � �,a// ;,., � 3623293 KERR—MCGEE GATHERING LLC ATTN: RIGHT OF WAY DEPT. 1099 18th Street, Suite 1800 DENVER CO 80202 I ` / ( / ��/� / // 11 C % // ;� r: p 3713895 WELD COUNTY DEPT. OF PUBUC WORKS CURTIS HALL, DIRECTOR P.O. BOX 785 GREELEY CO 80632 970-400-3750 X 3750 � . / I � /j j � j �� % �� ,;�.,� 120929400051 4077028 KERR—MCGEE GATHERWG LLC ATTN: RIGHT OF WAY DEPT. 1099 i8th Street, Suite 1800 DENVER CO 80202 � � � Q , ��';�= y 4083115 KERR—MCGEE GATHERING LlC ATTN: RIGHT OF WAY DEPT. 1099 18th Street, Suite 1800 DENVER CO 80202 I ` � � // ��7�( / � � % � ��T� r�`°� A 4083118 KERR—MCGEE GATHERING LLC ATTN: RIGNT OF WAY DEPT. 1099 i8th Street, Suite 1800 DENVER CO 80202 i 4 � � �/ / � 23 � RE-502/ �:dl�� p❑6 , . / / ^ BURIED LINE � / � ��, / � % / �/ � \ 37�3 y� ��i�o p 315477- W�R ,� CITY OF THORNTON ATTN: RIGHT OF WAY DEPT. 9500 Civic Center Drive THORNTON CO 80229 720-997-6500 � i i �' � r��';;'�� I / �� // % � ,/�' ,�� .�`\\ , ;r.l�p NOTE: THERE IS A DISCREPANCY BETWEEN ALTA S BOUNDARY & THE WELD COUNTY GIS BOUNDARY LINES. 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' P-125B ,f� ,� r � :_3 � � � ' � � f �'�'%� %'� �' � � ��i� �4 rs"� i I� � ,, SEEP DITCH P125A 23.8 NA 5.7 18.4 3H: 1 V � � I �\ W \��.��' `� � c �� % �� %�� %,��,, ' DEVELOPED WATER RESOURCES �h .�,��" � ::=� � .. � :: � , y � ,�� P125B 30.8 NA 6.9 24.2 3H: 1 V � � �� ' � � � � '�� '',/` ',, '�,� WITH GRASS EMBANKMENTS '°`� ''� i I ,' I : � / 1 / i �— 1 ��, . , , , � � � � � � J ''"� i � � ., � , � i / , � � � � � 1 � �� - �� :.�_� �� '�� '�� '%�/� � �';� ��,�� ?� � � EXTERNAL T0 PIT RELATIVELY \ � f / � � � � � � ,,,� '% �`, , , ✓i' �o° � � � � � � :�� 1 .5 NA 1 .5 NA � � � 1 � i ��-y . � �� ,, ��1�,��f ,; /.jr �1;�� , � �,h ', � � �; � DISTURBANCE FLAT \ r 5." � � � . �// , o� i Q �� \ r /l 1 _ / .�/ ��%��% '% ��i� � ��/ //�// �/ �� ^ I� �1 � �� \ ' _ � . ;� ,,// �f/��,//�%. /',��/ ; ^�/ � �� T0TAL 66.3 10.2 24.3 42.6 , /J � �,�' �'�; � � `; � 1 O \ �y j �V ' ��j �ii/// �/� /i+�`�`,� Q\ J� � I `I II �, i \ \ � `� i J � S ,� � / �,%%/ �'/� //�•�'%' / '^��,^ f� �% P�G� �� 9 N ,i'�O �!' �� ` FOOTNOTES: � � �� %� � � ,� �� v� � �, ,, ��.,� ACCESS POINT#2 1. INCLUDES AREAS DESIGNATED FOR PARKING/MATERIAL STORAGE, SETTLING BASINS, AND CONVEYOR CROSSINGS �� -., � � �" ,. �� " � � � � � �� 4 � b.( � � �`� i �-` � � „�� ,,� %,%� ��/'� �,P � � �� THAT WILL BE RECLAIMED FOLLOWING CESSATION OF MINING OPERATIONS ' � , I �, � ,,r� ��f �I � ; 1/ � � �r� , � . . � ��'� �� i�,:"��{ �� ""S � �� -' ��i�'� � � � � �� ♦ I � '�� , / �� ,i �,�� _ � . . _ ;�,�� f�� < � ��'�� n > � °' ' — / � �z � � � _ . . _ . . ��i _ �� -3H:1V_ 4790=4785'= � ��i �� ,�'-�_ �._ ___, � ::; I � ' - _ �`' . � /� ' � 4795 - � 25A �.�., : *:�-:-=,'. �--- - - -4800 � � - �---- - - ----- P � ,.,. ��.,.�,.. --� . . ...: ._. ... . .- _ � , � �� • � ' "— � �� ;�; DEVELOPED WATER RESOURCES ; �� ;':.�,�.:;::.;f-�.y.:�.; - =r•, I f � � /� � %,� WITH GRASS EMBANKMENTS � �_'��<:��'�� / : ��I ■ � // �� :i .:....�.r.�:..,:.�:,., � � � / /�/� � ■ `� � `_ \ � � / �� n�I _I a'� � �,� (� t ,��l� `� � � � � 1 �� / � - '�� 3`Z��' S� � f;:.::d �. � �— ;),,! ��'- �- �` �—,_ . , � /' /�� ,/��•� � , ��;i� I J 1J_-_- � � �~ I �� /�,�/ �� . �.' 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' ;� �� ` • � I, I ! � �' "*'nt;„�� h:� . / I � � i � �``� 1 � _ _ -_ ��-------__ � , , .. � i �- U= ��.��_ � � �— ----�— _ ; � ��<��` �, UNTY R0AD 2 r` f i � .Y � �— �>- — �. , �� "'� C0 . . . . , / � � ?� ��- ) Jr� T- ��. . . . . — � . .-.,:., ,.� .. . . .. . — � _ , . : ... . . .•• �.•: _ . .. ... . . . . . . � � ,..,. ... . ... .>.:. ....: . ... . ,. �. �,. .......... _ :�:rT,�.:: S.x;:.p-��z:� irr;:`;'`:::�;�., � ■ • / I � . . C0UNTYR0AD 28 _..: - - - .. . . . ..:: .n�._ �:.�: ( . . . •. ..,..��_ .. .. .. . . . . .... '.�3 � ,.1 ` � . �• 1 -- — — — — — — — — — � 1 � • ` ■ � � � —�____--. ' .— � ——� — — y � � ;�;:;�=,,v. � �� i i`� _ x�� . 1 � � �' - - - _ 1 l �-- _ _ � _ = _ -� ; - . . , _ _ __ _ . I ( �, ' ACCESS POINT#3 --- - - � � _ � _ �`�� ", EXISTING CONTOUR � . , ■ '� ,� ' � - �- - � -� - �.� � _ ~��\� �� •�� -:v, <;�-;3..� ., . . I ► 1 — —� — ^ � — —— �_ � � s�,.� — ��.� 1 / . Y _ _ � _ _ �_ , � :.s: : � . � . �. { 1 � - �-:r ____ � ��`� �� L� INTERVAL• 1 FEET S _ � ~ .. _.--- . ; !_ � ,- ---- --_ - -` -- .__._ _ _ ==----��, 11��\� � u_ � "r�, .:� I � r � � 1 i � �> �; �'� � ( I I � � ,�- -�., �,,� � — — ` �- � � �\��4,1 ' - � � ` n r.,� I�r. PROPOSED CONTOUR /i r � � T � � � � `� , �. ... � ""`_`. I � ' � � ...,..,-, . ----� � _�. �. _--�- -- _--- `� � . .� - :�:.•`.�.-.� � i� ' �.:..�.. .._ � INTERVAL� 2 FEET RAPTOR MATERIALS, LLC. PROJECT: � � NOTES: SCALE: "I IC1Ch = 2OO feet Co burn Sand , Gravel and Reservoir Pro ect DATE: 29 AUGUST 2025 8120 GAGE STREET g � FREDERICK, COLORADO 80534 + rF REvisioN: 15 DECEMBER 2025 TELEPHONE: (303) 666-6657 DRAWING: E X� I� I l I . R e c I a m a t i o n P I a n M a p PAGE: 1 OF 1 //PAGE 1 EXHIBIT C EXHIBIT C - PRE-MINING AND MINING PLAN MAP[Sl OFAFFECTED LANDS One or more maps may be necessary to legibly portray the following information: SECTION [A] All adjoining surface owners of record; All surface land owners within 200 feet of the proposed permit boundary have been listed in a table on map Exhibit C-1. SECTION [B] The name and location of all creeks,roads,buildings,oil and gas wells and lines,and power and communication lines on the area of affected land and within two hundred(200)feet of all boundaries of such area; All reasonably identifiable manmade structures,including roads,buildings,oil and gas infrastructures,utilities, ditches, lined ponds, fences, conveyors, wells, and culverts, as well as important natural features, such as creeks,have on the affected land and within 200 feet of the proposed permit boundary have been included on map Exhibit C-1. SECTION (C] The existing topography of the area with contour lines of sufficient detail to portray the direction and rate of slope of the affected land; One-foot contours generated from drone-collected photogrammetry from March 2023 are displayed on the Existing Conditions Map Exhibit C-1 and the Extraction Plan Map Exhibit C-2. SECTION (Dl The total area to be involved in the operation,including the area to be mined and the area of affected lands (see definition of"Affected Land"); The affected land is equal to the proposed permit boundary and is indicated on map Exhibits C-1 and C-2.The proposed area to be mined is indicated as the"Initial Extraction Area"on map Exhibit C-2. SECTION (El The type of present vegetation covering the affected lands;and The five predominant types of vegetation covering the affected lands are listed by area in Exhibit J Table 1 and presented spatially in map Exhibits C-1, Existing Conditions Map,and Exhibit C-0,Aerial Image and Vegetation Map,to provide an overlay against what may be observed from the imagery SECTION fF) . , �, Rapt A REGU AR IMPACT f11P]C0NST U�cT�I0N PERMIT A PLGATI0N I C0L RA O DIV SI0N 0F RECeAMATI0N MINING AND SAFETY,0FFICE 0F�MINED LAN�RECOLAMATI0N R E S p r CC //PAGE 2 EXHIBIT C In conjunction with Exhibit G-Water Information, Rule 6.4.7,if required by the Office,further water resources information will be presented on a map in this section. Water wells within the proposed permit boundary and within 200 feet of the boundary have been included in a table and their locations indicated on map Exhibit C-1 SECTION [G] Show owner's name,type of structures,and location of all significant,valuable,and permanent man-made structures contained on the area of affected land and within two hundred(200)feet of the affected land. All significant,valuable,and permanent' man-made structures on the affected land and within 200 feet of the affected land boundary are located and provided in a table on Exhibit C-1. SECTION (Hl In conjunction with Exhibit I-Soils Information,Rule 6.4.9,soils information may be presented on a map in this section. Soils information was not determined to be necessary for this section, but is presented on map Exhibit I/J. SECTION [Il Aerial photos,if available,may be included in this section. Due to the large amount of information on the map Exhibits C-1 and C-2, aerial imagery was removed for legibility. Aerial imagery can be seen clearly on map Exhibit I/J, with associated soils and vegetation information. 'Adequacy 2,Item 6 . , �, Rapt A REGU AR IMPACT f11P]C0NST U�cT�I0N PERMIT A PLGATI0N I C0L RA O DIV SI0N 0F RECeAMATI0N MINING AND SAFETY,0FFICE 0F�MINED LAN�RECOLAMATI0N R E S p r CC //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(6.0t)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 DRMS'.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 time3. 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 5.7 acres for Pit P125A and 6.9 acres for Pit P125B with volumes calculated based on a nominal six inches of soil cover at 4,567 and 5,586 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 . , �, Rapt A REGU AR IMPACT f11P]C0NST U�cT�I0N PERMIT A PLGATI0N I C0L RA O DIV SI0N 0F RECeAMATI0N MINING AND SAFETY,0FFICE 0F�MINED LAN�RECOLAMATI0N R E S p r CC //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:1 V 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 4t to St feet in depth and 4t to 16t 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 . , �, Rapt A REGU AR IMPACT f11P]C0NST U�cT�I0N PERMIT A PLGATI0N I C0L RA O DIV SI0N 0F RECeAMATI0N MINING AND SAFETY,0FFICE 0F�MINED LAN�RECOLAMATI0N R E S p r CC //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 operationsa. 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 P1256,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 P1256 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 a Adequacy 2,Item 10. g Adequacy 1,Items 33,37 1°Adequacy 1,Item 40 "Adequacy 1,Item 34 12 Adequacy 1,Items 38,39 . , �, Rapt A REGU AR IMPACT f11P]C0NST U�cT�I0N PERMIT A PLGATI0N I C0L RA O DIV SI0N 0F RECeAMATI0N MINING AND SAFETY,0FFICE 0F�MINED LAN�RECOLAMATI0N R E S p r CC //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 revision1°. 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 60.0t to 75t decibels.The level drops an additional 5.0t decibels for every 100.0±feet from the source of plant noise,achieving residential background levels at a total setback of 400t 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 '3 Adequacy 1,Item 41 14 Adequacy 2,Item 6 's Adequacy 1,Item 42(previous paragraph in original application removed) 16 Adequacy 1,Item 43 . , �, Rapt A REGU AR IMPACT f11P]C0NST U�cT�I0N PERMIT A PLGATI0N I C0L RA O DIV SI0N 0F RECeAMATI0N MINING AND SAFETY,0FFICE 0F�MINED LAN�RECOLAMATI0N R E S p r CC //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 P1256,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 DRMS". 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 . , �, Rapt A REGU AR IMPACT f11P]C0NST U�cT�I0N PERMIT A PLGATI0N I C0L RA O DIV SI0N 0F RECeAMATI0N MINING AND SAFETY,0FFICE 0F�MINED LAN�RECOLAMATI0N R E S p r CC //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 P125_S1,P125A,and P1256),the resulting basins will function as multiple-use reservoirs with a slightly fluctuating combined water surface area covering 42.6 acres.Of the remaining balance of 22.2±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 P125_S1,will be stabilized with vegetation;the remaining 12.6 acres of basin slopes in Pits P125A and P125B will be stabilized with vegetation'a SECTION (Dl (d)the size of area(s)to be worked at any one time. The 196.4-acre parcel boundary forms the permit boundary,as reflected on exhibit maps. All lands under its direct control within the 196.4-acre permit area,are affected lands under C.R.S.34-32.5-103(1),respective of this permit application.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 23.8 Acres= Primary Extraction Pit P125A—Eastern Pit 30.8 Acres= Primary Extraction Pit P125B—Central Pit 64.8 Acres=Total Primary Extraction 131.6 Acres=Affected Lands beyond planned extraction limits 196.4 Acres Tora� Of the outlying 131.6 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 64.8 Acres=Total Primary Extraction 66.3 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 z2 Adequacy 2,Item 12 . , �, Rapt A REGU AR IMPACT f11P]C0NST U�cT�I0N PERMIT A PLGATI0N I C0L RA O DIV SI0N 0F RECeAMATI0N MINING AND SAFETY,0FFICE 0F�MINED LAN�RECOLAMATI0N R E S p r CC //PAGE 7 EXHIBIT D Of the outlying 130.1 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 122.4 acres,41.3 acres are designated as a Mineral Reserve Area,which may be permitted and mined at some time in the future. 81.1 = 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 20.0t 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 125t 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 100t 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 potentiallyjurisdictional 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 81.1 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 z4 Adequacy 1,Item 51 . , �, Rapt A REGU AR IMPACT f11P]C0NST U�cT�I0N PERMIT A PLGATI0N I C0L RA O DIV SI0N 0F RECeAMATI0N MINING AND SAFETY,0FFICE 0F�MINED LAN�RECOLAMATI0N R E S p r CC //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 (El (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[D THROUGH[IID 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. ZS Adequacy 1,Item 52 . , �, Rapt A REGU AR IMPACT f11P]C0NST U�cT�I0N PERMIT A PLGATI0N I C0L RA O DIV SI0N 0F RECeAMATI0N MINING AND SAFETY,0FFICE 0F�MINED LAN�RECOLAMATI0N R E S p r CC //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_S1,23.8-acre Pit P125A,and 30.8-acre Pit P1256.Approximately 66.3 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 (Fl 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[D AND[IU (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 Z'Adequacy 1,Items 53,55 . , �, Rapt A REGU AR IMPACT f11P]C0NST U�cT�I0N PERMIT A PLGATI0N I C0L RA O DIV SI0N 0F RECeAMATI0N MINING AND SAFETY,0FFICE 0F�MINED LAN�RECOLAMATI0N R E S p r CC //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 23t to 50t 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 (Gl 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 useZg. 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 [D 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 Ul 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 28 Adequacy 1,Item 56 29 Adequacy 1,Item 62 3o Adequacy 1,Item 63 3'Adequacy 2,Item 4 . , �, Rapt A REGU AR IMPACT f11P]C0NST U�cT�I0N PERMIT A PLGATI0N I C0L RA O DIV SI0N 0F RECeAMATI0N MINING AND SAFETY,0FFICE 0F�MINED LAN�RECOLAMATI0N R E S p r CC //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 landowner3z. 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 3s Adequacy 1,Item 65 . , �, Rapt A REGU AR IMPACT f11P]C0NST U�cT�I0N PERMIT A PLGATI0N I C0L RA O DIV SI0N 0F RECeAMATI0N MINING AND SAFETY,0FFICE 0F�MINED LAN�RECOLAMATI0N R E S p r CC //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 revised3a 3s Adequacy 2,Item 9 37 Adequacy 1,Item 58 38 Adequacy 1,Item 59 . , �, Rapt A REGU AR IMPACT f11P]C0NST U�cT�I0N PERMIT A PLGATI0N I C0L RA O DIV SI0N 0F RECeAMATI0N MINING AND SAFETY,0FFICE 0F�MINED LAN�RECOLAMATI0N R E S p r CC //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 inethods 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(M2015-033')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 4.3 feet of excavation from the bases of Pits P125A and P125B. Topsoil will be stripped and stockpiled onsite for use in reclamation as extraction progresses2. 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 policies and goals of the State of Colorado,Weld County,and the Towns of Firestone,Platteville and Mead. 'Adequacy 2,Item 17 Z Adequacy 1,Items 67,68 . , �, Rapt A REGULAR IMPACT f11P]C0NST U�cT�I0N PERMIT A PLGATI0N I C0L RA O DIV SI0N 0F RECeAMATI0N MINING AND SAFETY,0FFICE 0F�MINED LAN�RECOLAMATI0N R E S p r CC //PAGE 2 EXHIBIT E 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 Regulations3. SECTION 2.C A description of how the Reclamation Plan will be implemented to meet each applicable requirement of Rule 3.1; Rule 3.1.1 Establishing Post-Mining Use 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 rangeland4. 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 5-6t 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 the standards established under the August 1999 State Engineer Guidelines for Lining Criteria.Typical to 3 Adequacy 1,Items 69,70 4 Adequacy 1,Item 71 . , �, Rapt A REGU AR IMPACT f11P]C0NST U�cT�I0N PERMIT A PLGATI0N I C0L RA O DIV SI0N 0F RECeAMATI0N MINING AND SAFETY,0FFICE 0F�MINED LAN�RECOLAMATI0N R E S p r CC //PAGE 3 EXHIBIT E 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"t 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 andjudgements 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 below6. 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,if concrete conveyor footings are not needed by the owner for other purposes either on or off site,they will be disposed of as fill on-site'. 5 Adequacy 1,Item 76 6 Adequacy 1,Item 72 'Adequacy 2,Items 20 and 28 . , �, Rapt A REGU AR IMPACT f11P]C0NST U�cT�I0N PERMIT A PLGATI0N I C0L RA O DIV SI0N 0F RECeAMATI0N MINING AND SAFETY,0FFICE 0F�MINED LAN�RECOLAMATI0N R E S p r CC //PAGE 4 EXHIBIT E 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 surface8. Typical Liner and Regrade for Extraction Limit Wall— Final Reclamation — — — — — — — — — — — — — — — — — — — — OriginalGroundSurface Sequence 1. In cycles • Establish line in keywey Stadc Water Level • Install 6ner in 6"Gfts � � t (�e��y) Backfillto3H:1V 23 2. Replace topsoil � Liner Groundwata Level � . .. .------` 1 Backfill at 1:25H:1V slope ��'-�_„ 3H:1V slope to 23-h depih '—T. Unexcavated ��' Perimeter Wall 3H:1Vslope _ below 23-h depth dr k Be oc K,. .;�. �ti. Y Y Figure 1.Typical Completed Reclamation Liner and Regraded Slope for Extraction Limit Wall9 Estimated volumes of material used in liner construction,overburden available from the extraction areas, and backfill on lined slopes is summarized in Table 1,o Table 1 Key Reclamation Quantities Liner Volume Overburden Volume Lined Slope Fill Depth Min Depth Max (C� (C1� (C1� (ft) (ft) P125 S1 NA 70,785 NA 40 50 P125A 67,485 154,213 205,596 35 45 P1256 50,503 200,902 150,875 25 35 Total 117,988 425,900 356,471 -- -- 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 8 Adequacy 1,Item 85 9 Adequacy 1,Item 73 1°Adequacy 1,Items 74,75,84 . , �, Rapt A REGU AR IMPACT f11P]C0NST U�cT�I0N PERMIT A PLGATI0N I C0L RA O DIV SI0N 0F RECeAMATI0N MINING AND SAFETY,0FFICE 0F�MINED LAN�RECOLAMATI0N R E S p r CC //PAGE 5 EXHIBIT E once submitted,accepted and approved by Weld County will be forwarded to the DRMS" 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 P125B12. 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 13'4: • 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 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 "Adequacy 1,Item 86 12 Adequacy 1,Item 77 13 Adequacy 1,Item 88 14 Adequacy 2,Item 19 . , �, Rapt A REGU AR IMPACT f11P]C0NST U�cT�I0N PERMIT A PLGATI0N I C0L RA O DIV SI0N 0F RECeAMATI0N MINING AND SAFETY,0FFICE 0F�MINED LAN�RECOLAMATI0N R E S p r CC //PAGE 6 EXHIBIT E 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,s SECTION 2.D Where applicable,plans for topsoil segregation,preservation,and replacement;for stabilization, compaction,and grading of spoil;and for revegetation. The revegetation plan shall contain a list of the preferred species of grass,legumes,forbs,shrubs or trees to be planted,the method and rates of seeding and planting,the estimated availability of viable seeds in sufficient quantities of the species proposed to be used,and the proposed time of seeding and planting; Topsoil stockpiling,stabilization,and application is addressed in this Exhibit E-Reclamation Plan Sections 2.A,2.C,and 2.F.Spoil stabilization,compaction,and grading is addressed in this Exhibit E-Reclamation Plan Sections 2.C and 2.F.A list of preferred seed mixes,application rates,and methods for revegetation is included as an addendum to Exhibit L-Reclamation Costs.The proposed time of seeding and planting is addressed in 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.) i. 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 t 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 54.6 surface acres,with a static water elevation surface area of 42.6 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. 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 15 Adequacy 1,Item 78 . , �, Rapt A REGULAR IMPACT f11P]C0NST U�cT�I0N PERMIT A PLGATI0N I C0L RA O DIV SI0N 0F RECeAMATI0N MINING AND SAFETY,0FFICE 0F�MINED LAN�RECOLAMATI0N R E S p r CC //PAGE 7 EXHIBIT E 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)16. 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: i. Final grading-specify maximum anticipated slope gradient or expected ranges thereof; As part of reclamation,lands situated above the anticipated final water level of the completed basins,and within 10±feet below the anticipated final water level of the basins,will be graded to 3H:1 V,or flatter.Lands below 10±feet from the anticipated final water level of the basins will also be graded to 3H:1 V,or flatter, unless 2H:1 V slopes are otherwise approved by subsequent permit revision. All basin walls below 30 ft bgs will be graded to 3H:1 V or flatter.Naturally occurring or previously established slopes may exceed 2H:1 V where not otherwise affected by extraction activities and may not be altered as part of reclamation unless necessary to facilitate the reclamation of affected lands. All affected lands between the extraction limits and remaining above the anticipated high-water mark of the basins will be capped with a minimum of six(6.0±)inches of soil,as supported by Exhibit I—Soils Information. Timing and use of soil are detailed further under Exhibit I-Soils Information and Exhibit L—Reclamation Costs. The areas above the static water level for each reservoir are": P125A= 5.7 acres P125B= 6.9 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 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 revegetated's,szo 's Adequacy 2,Item 21 "Adequacy 1,Item 79 18 Adequacy 1,Item 79 19 Adequacy 1,Item 80(following paragraph in the original application removed) 2°Adequacy 2,Item 18 . , �, Rapt A REGULAR IMPACT f11P]C0NST U�cT�I0N PERMIT A PLGATI0N I C0L RA O DIV SI0N 0F RECeAMATI0N MINING AND SAFETY,0FFICE 0F�MINED LAN�RECOLAMATI0N R E S p r CC //PAGE 8 EXHIBIT E 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 land21. 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 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 revegetation22. Targeting an application rate of: - Nitrogen—30-50 pounds/acre 21 Adequacy 1,Item 81 z2 Adequacy 1,Item 82 . , �, Rapt A REGU AR IMPACT f11P]C0NST U�cT�I0N PERMIT A PLGATI0N I C0L RA O DIV SI0N 0F RECeAMATI0N MINING AND SAFETY,0FFICE 0F�MINED LAN�RECOLAMATI0N R E S p r CC //PAGE 9 EXHIBIT E - 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 Ibs/acre. iv. Revegetation-specify types of trees,shrubs,etc.,quantities,size and location;and 23 zaA 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 ground25. The attending reclamation seed mixture,and as approved,has a provision for the use of a sterile hybrid grass in lieu of mulch.Mulch,even when crimped with specialized equipment,is subject to being blown off the property,or reduced to an ineffective stubble.Often,it has been observed to intercept rainfall where it quickly evaporates from the stubble surface,limiting the benefits of light precipitation by preventing infiltration and percolation of moisture to the root zone.The hybrid on the other hand will establish quickly, but since it is sterile,will not continue to compete with the emerging native grasses.After two to three years, the hybrid grass will begin to die out just as the native grasses emerge and improve their dominance over the revegetated areas. Field identification and location of targeted weed species is fundamental to determining the extent and character of weed infestation;and in the subsequent development of a treatment plan.Due to the complex nature of identification,assistance with identification and mapping will be sought from among Weld County Weed and Pest Division;Colorado State University Cooperative Extension Service;U.S.Natural Resources and Conservation Service;as well as online and internal resources. Mapping will attempt to identify general areas of infestation within the permit boundary,and vectors of infestation from inside or outside the permit boundary.Vectors are a consideration in prevention of future infestation,which may affect on-site behaviors,including method and means of access within permitted lands.An expectation that vectors from adjacent lands must be treated by adjacent landowners if treatment on permitted lands is to be fruitful is part of continuing treatment considerations. Since the list of noxious weed continues to grow,and considering the development of new treatments,this management plan is intended to retain the flexibility needed to meet future conditions and capabilities in the arena of weed management and control.Weed management will be under the supervision of a certified weed management specialist.All applicable requirements currently in force at the time will be adhered to.The primary species to be identified,mapped(if found),and treated will include those species on the State of Colorado noxious weed list,as updated. List A species will be eradicated and List B Species will be controlled.Weed management efforts will also attend to current guidance from the Weld County Department of Public Works. z3 Adequacy 1,Item 87(preceding paragraph in the original application removed) 24 Adequacy 1,Item 87 ZS Adequacy 1,Item 83 . , �, Rapt A REGULAR IMPACT f11P]C0NST U�cT�I0N PERMIT A PLGATI0N I C0L RA O DIV SI0N 0F RECeAMATI0N MINING AND SAFETY,0FFICE 0F�MINED LAN�RECOLAMATI0N R E S p r CC //PAGE 10 EXHIBIT E 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. 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. . , �, Rapt A REGU AR IMPACT f11P]C0NST U�cT�I0N PERMIT A PLGATI0N I C0L RA O DIV SI0N 0F RECeAMATI0N MINING AND SAFETY,0FFICE 0F�MINED LAN�RECOLAMATI0N R E S p r CC //PAGE 11 EXHIBIT E A Backfill Notice follows this page.The flexible use of inert fill will facilitate the timely reclamation of affected lands. . , �, Rapt A REGU AR IMPACT f11P]C0NST U�cT�I0N PERMIT A PLGATI0N I C0L RA O DIV SI0N 0F RECeAMATI0N MINING AND SAFETY,0FFICE 0F�MINED LAN�RECOLAMATI0N R E S p r CC //PAGE 1 EXHIBIT H EXHIBIT H - WILDLIFE INFORMATION SECTION 1 In developing the wildlife information,the Operator/Applicant may wish to contact the local wildlife conservation officer.The Operator/Applicant shall include in this Exhibit,a description of the game and non- game resources on and in the vicinity of the application area,including: SECTION 1 SUBSECTION A THROUGH C a description of the significant wildlife resources on the affected land; seasonal use of the area; the presence and estimated population of threatened or endangered species from either federal or state lists;and Wildlife residents and visitors observed on area lands include two Bald Eagle nests,one located approximately 0.11 miles northeast of the northern project area boundary,and one located 0.16 miles southwest of the western project area boundary.Other migratory birds have been seen in the area,but no nests were observed within the project area.Game species such as Mule Deer will traverse the river bottom, open spaces and fields nearby;as will fur bearers such as prairie dogs,rabbits,coyotes,raccoons,fox, skunks and other non-game species.The project area contains a habitat that could be considered suitable for the eastern black rail.However,the South Platte River drainage is not considered in the black rail's breeding range;concurrence was obtained from the US Fish and Wildlife Service(USFWS)on August 1,2025 that there are no concerns related to the eastern black rail within the project area and that no further consultation under the Endangered Species Act is required.No suitable habitats were found within the project area for the Preble's meadow jumping mouse.If additional wildlife surveys are conducted prior to the onset of operations that impact the proposed operations,the mining plan and associated maps will be updated accordingly'. SECTION 1 SUBSECTION D a description of the general effect during and after the proposed operation on the existing wildlife of the area,including but not limited to temporary and permanent loss of food and habitat,interference with migratory routes,and the general effect on the wildlife from increased human activity,including noise. No significant impacts to wildlife or habitat loss are anticipated by planned operations due to the abundant natural conditions of the surrounding lands and general expanse of the project area.Proposed extraction areas occupy less than 50%of the affected area.As with the current use as agricultural fields,temporary displacement of wildlife may occur over the immediate area of affected lands during active operations,while on-site speed limits will be posted at 15 mph to better assure the safety of wildlife in proximity to the activity. THREATENED AND ENDANGERED SPECIES Raptor Materials engaged ERO,a natural resource and environmental consulting firm to conduct a natural resources assessment.ERO assessed the project area for habitat for Threatened and Endangered(T&E) species under the Endangered Species Act(ESA).The ERO report is provided as an addendum to Exhibit H. 'Adequacy 2,Item 26 . , �, Rapt A REGU AR IMPACT f11P]C0NST U�cT�I0N PERMIT A PLGATI0N I C0L RA O DIV SI0N 0F RECeAMATI0N MINING AND SAFETY,0FFICE 0F�MINED LAN�RECOLAMATI0N R E S p r CC //PAGE 2 EXHIBIT H ERO reports that the proposed project would not directly affect Preble's meadow jumping mouse or monarch butterfly due to the lack of suitable habitat in the project area.No habitat was identified for the piping plover,whooping crane,and pallid sturgeon,nor would they be affected downstream due to depletions to the river. The project area contains habitat that would be considered suitable for the eastern black rail.However,the U.S.Fish and Wildlife Service(USFWS)currently only considers the Arkansas River drainage part of the breeding range for eastern black rails and does not consider the South Platte River drainage within the black rail's breeding range.Concurrence from the USFWS indicates that there would be no effects on the species, and no further action is necessary. Best Management Practices(BMPs),Voluntary Conservation Measures and recommendations discussed with ERO will be implemented to further minimize the risk of harm to T&E and other wildlife.These measures include: • Work areas will be stabilized in a manner to prevent or minimize soil erosion. • The operator will protect the surrounding area and,from siltation.The Contractor will utilize well- established NRCS storm water and erosion management measures to control erosion,as necessary. • All temporarily disturbed areas will be reseeded with native seed mix as specified in the mine plan. The mine plan states that the"Primary Revegetation Seed Mixture combines a thoughtful mingling of predominantly native grasses of diverse height,form,color and function,to add cover,food source for wildlife and pollinators." • The project will implement mine-site reclamation consisting of reseeding with native grasses and pollen producing species. • Trees along the lower terrace of the watercourses will be preserved where possible. • All riverine areas will otherwise remain untouched. • All mining areas,access routes,staging areas,and work areas will all be outside riparian areas. • The project will avoid fragmenting linear riparian corridors. • The project will avoid disturbing(e.g.,crushing or trampling)or removing(e.g.,cutting or clearing)all vegetation,such as willows,trees,shrubs,and grasses in riparian areas. • Impacts to all riparian habitat consisting of shrubs,grasses,and forbs will be avoided or minimized to maintain current vegetation communities and allow for habitat connectivity to habitat upstream and downstream. • Mining areas will predominantly occur with existing areas of human disturbance such as agricultural cropland,grazed pastures and roads. • Minimum 100-foot buffers will be established between planned disturbance and the bankfull river/riparian corridor. • Traffic will be limited to existing roads and bridges to the degree possible. • Noise and dust levels for the project are regulated under the Colorado Department of Public Health and Environment.These measures are sufficient to reduce and minimize noise and dust impacts to wildlife. BIG GAME ERO reviewed data from CPW map databases and determined Mule Deer Migration Corridors and Severe Winter Range high priority habitat(HPH)areas overlap the project area.Per recommendation of the CPW District Wildlife Manager and in concurrence with ERO's recommendations,construction within the Mule Deer Severe Winter Range will be avoided to the maximum extent possible from December 1 to April 30;if construction during that period is unavoidable,the start of said construction will be outside of the December . , �, Rapt A REGULAR IMPACT f11P]C0NST U�cT�I0N PERMIT A PLGATI0N I C0L RA O DIV SI0N 0F RECeAMATI0N MINING AND SAFETY,0FFICE 0F�MINED LAN�RECOLAMATI0N R E S p r CC //PAGE 3 EXHIBIT H 1 to April 30 window.Additionally,in conformance with CPW's recommendation to maintain an open riparian corridor,and in line with the BMPs listed above,the Saint Vrain Creek drainage will remain undisturbed and open to maintain suitable habitat and movement corridor northwest of the mine area. Aggregate mining in general is a slow,steady progression of mining within active cells.While the cells vary in size,the area actively being extracted will be generally 8 to 16 acres in size.The active extraction area will advance through the cells with concurrent reclamation taking place in the previous cell and where possible in the active cell.This incremental approach will retain open areas and opportunities for wildlife movement and foraging within unmined areas during the life of the mine noting that proposed extraction areas occupy less than 50%of the affected area.Even when mining is completed and the cells transitioned to water storage,there will be ample room remaining within the existing riparian and riverine areas along the St.Vrain Creek.Deer and other wildlife will be able to freely migrate,forage,breed and complete all life requirements along this broad migration path.The creek drainage will be undisturbed and remain open to maintain suitable habitat year-round,including severe winter weather,and provide movement corridors to the northwest of the mine area. Mining will normally be conducted during daylight hours when wildlife is the least active.As described above, aggregate mining in general is a slow,steady progression of mining within active cells affording wildlife the ability to avoid conflicts over the majority of the project area.There will be no vertical walls created by mining and each cell will also have multiple ingress and egress roads at moderate slopes for equipment.These roads will allow ample opportunity for wildlife to escape,particularly during wildlife active periods when no mining will occur.The operator has no record or evidence of trapped deer in a basin or cell at any of its aggregate operations in Colorado. There will be no fragmentation of wildlife habitat with unnecessary fencing. Existing fencing at the project site consists of wildlife-friendly,3-strand barbed wire. Raptor Materials will remove all unnecessary fencing that currently exists at the site working with ERO to identify existing unnecessary fencing,as well as keeping fences that benefit wildlife where possible(e.g.,fencing along Weld County Roads 17 and 28 that may provide a physical/psychological obstacle to wildlife traversing dangerous roadways). Deer populations commonly traverse active resource conservations projects like these.Deer and other wildlife are commonly seen at other Colorado mining operations by truck and haul operators as they browse the vegetation at the bottom of more fully extracted basins. AQUATIC NATIVE SPECIES In the project area,St.Vrain Creek coincides with the Aquatic Native Species Conservation Waters HPH.The presence of water moving through St.Vrain Creek provides suitable habitat for native species.As currently designed,the extraction area is located outside of the limits of St.Vrain Creek.Best Management Practices should be used during construction to discourage any sedimentation or construction runoff from entering St.Vrain Creek.Any impacts on the project area wetlands would likely require a Section 404 Permit,which may require a combination of restoration and mitigation of permanent impacts. Restoration or mitigation could provide resiliency to the Aquatic Native Species Conservation Waters HPH area. Commensurate with the CPW recommendations,the project will implement appropriate stormwater BMPs although it will not be able to implement no surface occupancy and no ground disturbance within 500 feet of the ordinary high water mark of St.Vrain Creek.The project area including within 500 feet of the ordinary high water mark of St.Vrain Creek is actively used as rangeland for cattle.The project will result in the removal of cattle and their access to the St.Vrain Creek.This action will reduce the introduction of bovine . , �, Rapt A REGULAR IMPACT f11P]C0NST U�cT�I0N PERMIT A PLGATI0N I C0L RA O DIV SI0N 0F RECeAMATI0N MINING AND SAFETY,0FFICE 0F�MINED LAN�RECOLAMATI0N R E S p r CC //PAGE 4 EXHIBIT H fecal matter into St.Vrain Creek,which is a known contributor to nutrient loading and water quality degradation to which native aquatic species are extremely sensitive.By eliminating this source of contamination and in partnership with the implementation of appropriate BMPs,the project,will enhance the localized ecological health of St.Vrain Creek and likely result in the localized improvement of habitat conditions for native aquatic species. The mine will comply will all regulations,standards,and policies of the Colorado Mined Land Reclamation Board for the protection of aquatic resources,including establishing a minimum 100-foot buffer between planned disturbance and the bankfull river/riparian corridor. Furthermore,Raptor Materials has provided stormwater BMPs and reclamation plans in the mine site application that are designed to protect aquatic resources. BALD EAGLE AND MIGRATORV BIRDS A bald eagle nest is located approximately 0.11 miles northeast of the northern project area boundary.A second bald eagle nest was identified approximately 0.16 miles southwest of the western project area boundary by CPW on March 1,2025.These nests could be impacted by the project if a physical object or structure(i.e.,surface occupancy)is proposed within the CPW-recommended 0.25-mile radius of active nests permanently or for a significant amount of time or if there would be human encroachment activities within a 0.5-mile radius of an active nest from December 1 through July 31. ERO is developing a bald eagle mitigation plan to comply with the Bald and Golden Eagle Protection Act (BGEPA),Migratory Bird Treaty Act(MBTA),and 2016 USFWS Eagle Permit Rules as applicable for any activity within the 0.25-mile nest radius.All areas of initial extraction are located outside the 0.25-mile radius, and thus can be conducted without a bald eagle mitigation plan.Monitoring of the nests is ongoing.An approved mitigation plan will be instated if deemed necessary by the USFWS prior to extraction within the 0.25-mile nest radius,or within the 0.5-mile radius between December 1 and July 31.In all cases,a migratory bird nest survey will be completed one week prior to ground-or vegetation-disturbing activities. If the Eagle Protection Plan and review of the Eagle Permitting website determine that unavoidable disturbance will occur as a result of the project,Raptor Materials will apply for the appropriate Eagle Nest Disturbance permit.If an Eagle Nest Disturbance permit is issued by U.S.Fish and Wildlife Service,no modification will be made to the mining plan as the project would be in compliance with U.S.Fish and Wildlife Service rules and regulations regarding disturbance to eagle nests. OTHER SPECIES OF CONCERN BLACK-TAILED PRAIRIE DOG ERO observed active black-tailed prairie dog burrows in the northern portion of the project area during the 2024 site visit.Although prairie dogs are not protected under the ESA,CPW recommends attempting to remove or exterminate prairie dogs prior to bulldozing an active prairie dog town for humane reasons.Weld County does not have any regulations or policies pertaining to prairie dogs and CPW protocol should be followed. Raptor Materials will implement a voluntary prairie dog management approach that may include avoidance, passive dispersal,and/or humane lethal control.The selection of any single or combination of these techniques will be prioritized based on site-specific conditions and regulations,and the likelihood of success. ERO supports this approach as a humane and practical solution to address human-prairie dog conflicts.Because mining would be incremental in scale over the life of the project,avoidance will be the first . , �, Rapt A REGULAR IMPACT f11P]CONST U�cT�ION PERMIT A PLGATION I COL RA 0 DIV SION OF RECeAMATION MINING AND SAFETY,OFFICE OF�MINED LAN�RECOLAMATI0N R E S p r CC //PAGE 5 EXHIBIT H option for most of the project area.Prairie dogs will be allowed to remain in areas not being actively mined.If impacts on prairie dogs cannot reasonably be avoided,one(or a combination)of the alternatives described above will be implemented.Any management option selected to address prairie dogs will be conducted in a manner that is compliant with local,state,and federal regulations. WESTERN BURR0WING OWL The western burrowing owl is a threatened species federally protected under the MBTA.The prairie dog burrows within and around the project area are a suitable habitat for burrowing owls.More than 70 percent of sightings reported in Colorado Breeding Bird Atlases were in prairie dog colonies(Colorado Bird Atlas Partnership 2016).CPW recommends a buffer of 660 feet surrounding active burrowing owl nests during the nesting season.No prairie dog burrows are located within the extents of the proposed initial area of extraction;however,burrows are present within the 660-foot buffer. Burrowing owl surveys were conducted by ERO in compliance with CPW's Recommended Survey Protocol and Actions to Protect Nesting Burrowing Owls(CPW,2011)on April 17,April 26,and May 2,2025.No burrowing owls were observed within the project area during any of these three surveys.Additional surveys will be conducted if construction begins within the 2026 burrowing owl nesting period(March 15-October 31).If burrowing owls are found to occupy the site,earthmoving work that could impact or cause the collapse of burrowing owl dens will be delayed until late fall after they have migrated.Extraction occurring from November 1 through March 14 would not require clearance surveys because it would not fall within the burrowing owl nesting season.Burrowing owl management will follow required local,state,and federal regulations. SECTION 2 The application may be reviewed and commented upon by Colorado Parks&Wildlife(CPW).If CPW has comments,they must be provided prior to the end of the public comment period specified in Subsection 1.7.1(2)(a)to be considered by the Board and Office. Comments were received from CPW in a letter dated April 17,2025,which is included as an attachment to this Exhibit.Items pertaining to mule deer,bald eagles and migratory birds,aquatic species,and burrowing owls have been integrated into Section 1.Additional items raised by CPW are addressed below: FENCING Any fencing erected during or after the project will comply with the CPW-recommended three-or four-stran smooth-wire fencing with the bottom strand height a minimum of 17 inches above ground level and a maximum top strand height of 42 inches above ground level.Existing fencing at the site may be removed where practicable,but is not planned to be removed unnecessarily. NOXIOUS WEEDS AND NATIVE RE-SEEDING A Noxious Weed Management Plan will be implemented prior to the start of site activities.Native vegetation will be left undisturbed as much as possible outside areas of active extraction,vehicle access,and materials storage. Revegetation will be completed using an appropriate native seed mix recommended by the Weld County Department of Public Works(see exact mix in Exhibit L). LIGHTING Typical mine operations will be only during daylight hours.Any nighttime lighting will be for periodic maintenance,and will be installed such that the lighting is in conformance with CPW recommendations of . , �, Rapt A REGULAR IMPACT f11P]C0NST U�cT�I0N PERMIT A PLGATI0N I C0L RA O DIV SI0N 0F RECeAMATI0N MINING AND SAFETY,0FFICE 0F�MINED LAN�RECOLAMATI0N R E S p r CC //PAGE 6 EXHIBIT H longer wavelengths(>560 nm)and lower correlated color temperatures(CCT<3000 Kelvin degrees). Nighttime lights will be motion-detected to ensure it is switched off following completion of maintenance activities. . , �, Rapt A REGU AR IMPACT f11P]C0NST U�cT�I0N PERMIT A PLGATI0N I C0L RA O DIV SI0N 0F RECeAMATI0N MINING AND SAFETY,0FFICE 0F�MINED LAN�RECOLAMATI0N R E S p r CC //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/ApplicanYs estimate of the cost of reclamation for all Affected Lands. SUMMARV 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 . , �, Rapt A REGU AR IMPACT f11P]C0NST U�cT�I0N PERMIT A PLGATI0N I C0L RA O DIV SI0N 0F RECeAMATI0N MINING AND SAFETY,0FFICE 0F�MINED LAN�RECOLAMATI0N R E S p r CC //PAGE 2 EXHIBIT L Table 1.Reclamation Direct Cost Summary Task Pit Cost DIRECT COSTS Dewater pit-initial pumping P125A and P125B $81,165 Dewater pit-continual pumping P125A and P125B $5,427 Excavate pit bottoms for liner material P125A and P125B $14,575 Haul and push liner material to pit area P125A and P125B $34,200 Mix material for liner P125A and P125B $7,209 Compact liner P125A and P125B $7,706 Excavate pit bottoms for P125_S1 backfill deficit P125A and P125B $14,567 Haul backfill material from overburden stockpiles and pit bases to P125_S1 P125S1 $767,633 Excavate pit bottoms for liner backfill P125A and P125B $29,133 Haul and push subsoil from pit bottoms to grade over liner P125A and P125B $63,658 Grade subsoil over liner P125A and P125B $57,227 P125A,P125B,and $13,533 Rip pond banks and P125_S1 P125 S1 Haul topsoil to pit areas P125A,P125B,and $23,673 P125_S1 Spread topsoil on reservoir banks and backfilled areas P125A,P125B,and $5,337 P125_S1 Seed banks of ponds and P125_S1 P125A,P125B,and $36,242 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: $1,262,417 . , �, Rapt A REGU AR IMPACT f11P]C0NST U�cT�I0N PERMIT A PLGATI0N I C0L RA O DIV SI0N 0F RECeAMATI0N MINING AND SAFETY,0FFICE 0F�MINED LAN�RECOLAMATI0N R E S p r CC //PAGE 3 EXHIBIT L Table 2.Reclamation Indirect Cost Summary Item Percentage of[Cost/Hours] Cost INDIRECT C0STS—0VERHEAD AND PR0FIT Liability Insurance 2.02%[DC] $25,501 Performance Bond 1.05%[DC] $13,255 Job Superintendent 50%[Total Job Hours]� $72,259 Profit 10%[DC] $126,242 INDIRECTC0STS—LEGAL,ENGINEERING,PR0JECTMANAGEMENT Financial Warranty Processing N/A $500 (legal) Engineering/contract/bitl 6%[DC+0&P] $89,980 Reclamation Mgmt/Admin 4,5%[DC+0&P] $67,485 SUBT0TAL INDIRECT C0STS: $395,222 *Job hours for this project are estimated at 1,924 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—$1,657,639—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 23.8 30.3 64.8 Static Water Area—surface(Acres) N/A 18,4 24.2 42,6 Static Water Area—elevation(ft.) N/A 4,785 4,782 - Basin Lands Above Static Water Level(Acres) N/A 5.7 6.9 12,6 Static Water Level Volume(cu.yds.) N/A 730,918 484,098 1,215,016 Static Water Level Volume(Gallons) N/A 147,626,451 97,775,222 245,401,673 Static Water Level Volume(Acre-Feet) N/A 453.0 300.1 753.1 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 . , �, Rapt A REGU AR IMPACT f11P]C0NST U�cT�I0N PERMIT A PLGATI0N I C0L RA O DIV SI0N 0F RECeAMATI0N MINING AND SAFETY,0FFICE 0F�MINED LAN�RECOLAMATI0N R E S p r CC //PAGE 4 EXHIBIT L within the 196.4t 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 • 23.8±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. . , �, Rapt A REGU AR IMPACT f11P]CONST U�cT�ION PERMIT A PLGATION I COL RA 0 DIV SION OF RECeAMATION MINING AND SAFETY,OFFICE OF�MINED LAN�RECOLAMATI0N R E S p r CC //PAGE 5 EXHIBIT L The keyway dimensions may vary from 4t to 8t feet in depth and 4t to 16t 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 changez. 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 800,000t 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 64.8-acre excavation across Pits P125_S1,P125A,and P125B will result in creation of approximately 14,177 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 change3. 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 550,000t 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 . , �, Rapt A REGU AR IMPACT f11P]C0NST U�cT�I0N PERMIT A PLGATI0N I C0L RA O DIV SI0N 0F RECeAMATI0N MINING AND SAFETY,0FFICE 0F�MINED LAN�RECOLAMATI0N R E S p r CC //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 147,626,432 4,785 196,514,062 P125B 48,887,611 4,782 Unit Cost: $0.000413 TotalJobCost: $81,165 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. . , �, Rapt A REGU AR IMPACT f11P]C0NST U�cT�I0N PERMIT A PLGATI0N I C0L RA O DIV SI0N 0F RECeAMATI0N MINING AND SAFETY,0FFICE 0F�MINED LAN�RECOLAMATI0N R E S p r CC //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 5,185 2,200 42.4 2,163,934 P125B 0.56 5,912 2,800 47.4 7,956,698 Unit Cost: $0.000536 Total Job Cost: $5,427 The total dewatering cost(initial plus continuous)is estimated at$86,592. 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 1.1±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 length4.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 . , �, Rapt A REGU AR IMPACT f11P]C0NST U�cT�I0N PERMIT A PLGATI0N I C0L RA O DIV SI0N 0F RECeAMATI0N MINING AND SAFETY,0FFICE 0F�MINED LAN�RECOLAMATI0N R E S p r CC //PAGE 8 EXHIBIT L Table 6.Regrade and LinerVolume Calculations Pit4 Activity Wall Area[sq.ft] Wall Depth[ft] Keyway Length[ft] XS KeywayArea[sq.ft] Material Vol[cu.yd] P125A Regrade 194,880 N/A N/A N/A 92,311 P125B Regrade 145,839 N/A N/A N/A 67,742 P125A Liner 194,880 4 1,968 16 30,300 P125B Liner 145,839 4 2,249 16 22,675 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 — — — — — — — — — — — — — — — — — — — — OriginalGroundSurfoce Sequence - 1. In cycles • Establish line in keyway Static Water Level • Install Gner in 6"lihs � ^� ^ (vanes) • Backfill ro 3H:1V 23' 2. Replacetopsoil �� L��.=- Croundwater Leva', � �' _ Backfill at 125H:1Vslope 3H 1V�.lope to 23-h depth � --_ Unezcaveted �`'�-` Perimeter Wall � _ 3H:1V slopc �:P.�\h'23-!t C�c'�;I�l r . �: Bed ock '% Ke .;�, ri �y .' Figure 1.Typical Fully Reclaimed Liner antl 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 an haul material when necessary,and a Cat 815 class compactor. . , �, Rapt A REGU AR IMPACT f11P]CONST U�cT�ION PERMIT A PLGATION I COL RA 0 DIV SION OF RECeAMATION MINING AND SAFETY,OFFICE OF�MINED LAN�RECOLAMATI0N R E S p r CC //PAGE 9 EXHIBIT L Table 7.Reclamation Liner Installation Cost Estimate Activiry Initial Vol Swell/Compaction Loose/Compacted Unit Cost Total Job Cost [cu.yd] Factor Vol[cu,yd] [$/cu.yd] Rip 47,913 1.215 58,214 $0.304 $14,575 Haul 3,328 1.215 4,043 $1,207 $4,880 Push 44,585 1.215 54,171 $0.541 $29,320 Mix 23,956 1.215 29,107 $0.248 $7,209 Compact 58,214 0.91 52,975 $0.145 $7,706 Total Liner Cost: $63,690 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 t 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 468,500t 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 (52,480 CY)is assumed to be sourced from the bases of Pits P125A and P1256,and will require an additional average 1.1 t 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) 131,731 1.215 160,053 $0.221 $29,133 Rip(P125_S1 backfill) 45,635 1.15 52,480 $0.319 $14,576 Haul(liner backfill) 9,046 1.215 10,991 $0.993 $10,919 Haul(P125 S1 backfill) 471,535 1.15 542,265 $1.416 $767,633 . , �, Rapt A REGU AR IMPACT f11P]C0NST U�cT�I0N PERMIT A PLGATI0N I C0L RA O DIV SI0N 0F RECeAMATI0N MINING AND SAFETY,0FFICE 0F�MINED LAN�RECOLAMATI0N R E S p r CC //PAGE 10 EXHIBIT L Push(liner backfill) 122,684 1.215 149,062 $0.354 $52,739 Grade(liner backfill) 160,053 N/A 160,053 $0.358 $57,227 Total Backfill Cost: $932,227 TOPSOIL Topsoil demand will be limited to the cut basin slopes remaining above the static water level for pits reclaimed as reservoirs(P125A and P125B),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 E1,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 5.7 acres and 6.9 acres for Pits P125A and P1256,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 24.3 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/Compactetl Vol Unit Cost Total Job Cost [ft] [cu.yd] Factor [cu.yd] [$/cu.yd] Rip 1,059,099 N/A 24.3 ac N/A 24.3 ac $556.58/ac $13,533 Haul 1,059,099 0.5 19,613 N/A 19,613 $1.207 $23,673 Grade 1,059,099 0.5 19,613 N/A 19,613 $0.272 $5,337 Total Topsoil Application Cost: $42,542 . , �, Rapt A REGU AR IMPACT f11P]C0NST U�cT�I0N PERMIT A PLGATI0N I C0L RA O DIV SI0N 0F RECeAMATI0N MINING AND SAFETY,0FFICE 0F�MINED LAN�RECOLAMATI0N R E S p r CC //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 Disturbetl Area[ac] Rate Area[sq.ft] Seetl Cost/Acre Total Job Cost P125 S1" 11.7 25% 14.7 $1,192 $17,482 P125Aand 12,6 25% 15.8 $1,192 $18,760 P125B Total Reseeding Cost: $36,242 *Includes the 1.5 acres of areas external to the extraction areas,most of which are adjacent to P125_S1 CONVEVOR 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 conveyor itself is 3 feet wide. 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). . , �, Rapt A REGU AR IMPACT f11P]C0NST U�cT�I0N PERMIT A PLGATI0N I C0L RA O DIV SI0N 0F RECeAMATI0N MINING AND SAFETY,0FFICE 0F�MINED LAN�RECOLAMATI0N R E S p r CC //PAGE 12 EXHIBIT L 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. . , �, Rapt A REGU AR IMPACT f11P]C0NST U�cT�I0N PERMIT A PLGATI0N I C0L RA O DIV SI0N 0F RECeAMATI0N MINING AND SAFETY,0FFICE 0F�MINED LAN�RECOLAMATI0N R E S p r CC //PAGE 1 EXHIBIT M EXHIBITM - OTHER PERMITSAND LICENSES SECTION 1 A statement identifying which of the following permits,licenses and approvals the Operator/Applicant holds or will be seeking in order to conduct the proposed mining and reclamation operations:effluent discharge permits,air quality emissions permits,radioactive source material licenses,the State Historic Preservation Office clearance,disposal of dredge and fill material(404)permits,permit to construct a dam,well permits, explosives permits,highway access permits,U.S.Forest Service permits,Bureau of Land Management permits,county zoning and land use permits,and city zoning and land use permits. ■ Colorado Department of Health Stormwater Discharge Permit Received 10/10/25. • Colorado Department of Health Emission Permit N/A -Concrete Batch Plant. ■ Colorado Department of Health Emission Permit N/A -Portable Equipment-Dry Plant Colorado Department of Health Emission Permit N/A -Wet Plant ■ Colorado Department of Health Emission Permit Pending -Fugitive Dust-Mining Operations and related activities. ■ Weld County Use by Special Review Permit Pendinq. • Colorado Division of Water Resources Well Permit Pendinq. ■ Colorado Division of Water Resources Substitute Water Supply Plan Pendinq. ■ State Historic Preservation Office clearance N/A. ■ U.S.Department of the Army Corps of Engineers No Permit Required per Correspondence of 17 December 2024. ■ U.S.Mine Safety and Health Administration Mine ID 0504681 (part of Kurtz complex), Approved training plan in place. ■ Planned operations will not utilize or encounter materials,sources,or authorities over related lands and do not require permits for the following: radioactive source materials, construction of a dam,explosives,highway access,U.S.Forest Service,Bureau of Land Management,city zoning or land use. ■ Note:Any necessary permits for other planned or potential activities,including asphalt batch plants,recycling facilities and operations,etc.,will be acquired prior to on-set of such plants,facilities or operations.A well permit and an approved Substitute Water Supply Plan will be obtained from the Colorado Department of Water Resources and submitted to the DRMS prior to exposing groundwater'.All future permits will be submitted to the Division to update this list as necessary. 'Adequacy 2,Item 11 . , �, Rapt A REGU AR IMPACT f11P]C0NST U�cT�I0N PERMIT A PLGATI0N I C0L RA O DIV SI0N 0F RECeAMATI0N MINING AND SAFETY,0FFICE 0F�MINED LAN�RECOLAMATI0N R E S p r CC //PAGE 1 EXHIBIT S EXHIBIT S - PERMANENT MAN-MADE STRUCTURES Where the affected lands are within two hundred(200)feet of any significant,valuable and permanent man- made structure,the applicant shall: SECTION 1 provide a notarized agreement between the applicant and the person(s)having an interest in the structure, that the applicant is to provide compensation for any damage to the structure;or The notarized agreements between the applicant and the person(s)having an interest in the structure,that the applicant is to provide compensation for any damage to the structure will be attached as an addendum to this Exhibit S.Notarized agreements will be sought with: -Accord St Vrain Valley Ranch,LLC -Robert Allen Collins -Town of Firestone -LG Everist Inc -Platteville Dairy, LLC -Ready Mixed Concrete Company -Raptor Materials,LLC -Pasquale Varra -Last Chance Ditch Company -Kerr-McGee Oil&Gas Onshore,LP -Kerr-McGee Gathering, LLC -Panhandle Eastern Pipeline Company -Resource Gathering System,Inc. -Kerr-McGee Rocky Mountain Corporation -Occidental Petroleum -Snyder Oil Corporation -Weld County Department of Public Works -HS Resources This complete list of structure owners is also shown on Exhibit C-1:Existing Conditions Map.Although a notification letter was sent to HS Resources due to a reception number that encompasses the entirety of the Cogburn site,no physical oil and gas infrastructure was identified as owned by them;therefore,HS Resources is not listed as a structure owner on the Table on Exhibit C-1. SECTION 2 where such an agreement cannot be reached,the applicant shall provide an appropriate engineering evaluation that demonstrates that such structure shall not be damaged by activities occurring at the mining operation;or A slope stability analysis performed by American Water Engineering Services,LLC is included as an addendum to this Exhibit S with a supplement containing additional analysis requested by DRMS.The analysis shows with the recommended extraction wall geometry,the excavations have an acceptable factor of safety and if failure were to occur,it would be unlikely to impact structures more than 10 feet from the original extraction limit.A minimum set back of 20.0t 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 has been adopted in the design of the extraction areas. , . , �, Rapt A REGU AR IMPACT f11P]CONSTRUC ONP RMIT A PLICATIONntlOLORAD D VIS ON F RECLAMATION MINING AND SAFETY,OFFICE OF�MINED LAN�REC�LAMATION R E S p r CC //PAGE 2 EXHIBIT S SECTION 3 where such structure is a utility,the Applicant may supply a notarized letter,on utility letterhead,from the owner(s)of the utility that the mining and reclamation activities,as proposed,will have"no negative effect" on their utility. The notarized agreements between the applicant and the person(s)having an interest in the utility,that the applicant is to provide compensation for any damage to the utility will be attached as an addendum to this Exhibit S.Notarized agreements will be sought with: -United Power -CenturyLink -City of Thornton(note the water pipeline in the City of Thornton Easement is currently under construction) , . , �, Rapt A REGU AR IMPACT f11P]CONSTRUC ONP RMIT A PLICATIONntlOLORAD D VIS ON F RECLAMATION MINING AND SAFETY,OFFICE OF�MINED LAN�REC�LAMATION R E S p r CC Hello