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Home My WebLink About20250955.tiffEpviroinvept, Inc. LARRY E. O'BRIAN FOUNDER STEVAN L. O'BRIAN PRESIDENT July 22, 2025 via e-mail CTB@weld.gov Weld County Clerk to the Board Board of County Commissioners Office 1150 "O" Street Greeley, Colorado 80631 7985 VANCE DRIVE, SUITE 205A ARVADA, COLORADO 80003 303-423-7297 FAX 303-423-7599 1 PAGE OF DOCUMENT INCLUDED IN PAPER FILE. REMAINDER RETAINED ELECTRONICALLY IN TYLER. Re: L.G. Everist, Inc. - Ft Lupton Sand and Gravel M-1999-120 Adequacy Response - 02 & 03 Packets Dear Sir/Madam: We are delivering to you here with a cope of the Adequacy response and supporting exhibits for the L.G. Everist, Inc, - Ft. Lupton Sand and Gravel mine application filed with you on November 19, 2024. Please place this packet with the original book. The original is on file with the Division of Reclamation, Mining & Safety. This copy of the permit application adequacy response is delivered to you pursuant to 34-32.5-112(9)(a), Colorado Revised Statutes 1995, as amended, which states in part: .... the applicant shall place a copy of such application for public inspection at the office of the Board and Office of the County Clerk and Recorder of the County in which the affected land is located. This packet must be kept with the book for public review until the application has been approved by the Division. Please acknowledge receipt of the copy of the permit adequacy response by date stamping this cover or signing in the appropriate space provided below and returning one copy of this letter to environment-inc@startmail.com. Thank you, ENVIRONMENT, INC. Stevan L. O'Brian enclosure RECEIVED JUL 2 2 2025 WELD COUNTY COMMISSIONERS RECEIVED THIS DAY OF, 2025 , one copy of the adequacy response 02 & 03 packet for above referenced mine. 7thi c 1�ie v if c) riIzsrlzs Weld County Clerk to the Board By CC: i�LCDF4A-INIDA/DA IKFM), PIA) LekilcA<TDDImeiss) 112L/7.5 2ozs-oRss EpvironweirL. LARRY E. O'BRIAN FOUNDER STEVAN L. O'BRIAN RIAN PRESIDENT July 22, 2025 Ms. Nikie Gagnon Division of Reclamation, Mining & Safety 1313 Sherman St., #215 Denver, CO 80215 Dear Nikie; RE: 7985 VANCE DRIVE, SUITE 205A ARVADA, COLORADO 80003 303-423-7297 FAX 303-423-7599 L.G. Everist, Inc. Fort Lupton Sand and Gravel, Permit # M-1999-120 Adequacy Response #3 On behalf of my client L.G. Everist, Inc., I will respond to your February 5, 2025 and February 7, 2025, adequacy review letters, as needed, in the order and number format presented in t hose documents. We have copied each inquiry into this document for ease of review. I'm not sure what made me ignore the second page of the Adequacy Review #2 but I will address them this time. In recent phone conversations the Division advised us that t hey will no longer accept graveling the reservoir slopes from t he top of the bank to the reservoir water line. We have revised t he Mining and Reclamation plans to reflect this new requirement. We will be graveling the areas on the flats surrounding the Reservoirs and soiling and seeding the area from the top of the bank to the high water line. Attached are redline copies of the pages revised for ease of review, a revised Reclamation Plan Map, and revised Exhibit L. 6.4.4 Exhibit D - Mining Plan 7. River Setback and Bank Armoring. 7a. DRMS Additional Comment In the adequacy response, the applicant is proposing a 250 -foot setback from the top of the riverbank during mining that will be backfilled to 300 feet during slope reclamation. The Division requires that the "Floodplain Protection Standards for Sand and Gravel Pits Adjacent to Rivers and Perennial Streams" Environment, Inc. M-1999-120 - AM -O3 Adequacy Response #3 Page 2 July 22, 2025 (February 2024) be applied, both during and after the mining operation and during reclamation, to limit impacts during flooding events and reduce the possibility of stream capture. Therefore, please revise the exhibits, both text and maps, to incorporate a 300 -foot setback from the top of the riverbank to the top of the pit side bank during all phases of mining and reclamation. Where armoring in needed in the Northeast #1 and Northeast #2 Stages mining will stay 300 feet from the riverbank. From the top of slope, the banks will be backfilled, graded and armored as discussed in the revised Mining and Reclamation Plans. Full copies of revised Exhibit D -Mining Plan & Exhibit E - Reclama- tion Plan are attached. Redline copies are also supplied so you can easily review the areas where the revisions were made. The Division acknowledges that in the area of the Parker #4 phase on the south end of the permit area, the riverbank is armored, and a 250 -foot setback from riverbank to the top of the mining/reservoir slope is appropriate. Thank you for the acknowledgment regarding the 250 -foot setback for the Parker #4 phase, since the riverbank is armored. 6.4.7 Exhibit G - Water Information 10a. The model prepared by Schnable Engineering does not include the recently installed French drain on the west side of the NCCI pit, adjacent to the Northwest area. Will the drain change the modeled predictions? If so, please revise the groundwater study to include this drain. The groundwater study has been revised to cover a much larger area and to include the NCCI drain and the areas surrounding the Northwest and Southern areas. Please refer to the groundwater study for details on the exact area modeled. 10b. The model shows a minimum depth to groundwater of four feet and predicts up to 4 feet of mounding upgradient of the slurry wall. The operator proposes to install a drain if the depth to groundwater, following the construction of the slurry wall, approaches three feet below the surface. Please update the groundwater study include an evaluation of the potential impacts from groundwater changes to property and structures adjacent to the Northeast area. This includes homes and outbuildings, wells, agricultural fields, CR 25, and the horse property and track on the north side of the proposed mine. Figure #7 shows that there would be very little change in the ground water elevation along the west and north sides of the NCCI Pit and the Northeast Phases. If that is the case, there would be no impacts to the homes and outbuildings, wells, agricultural Environment, Inc. M-1999-120 - AM -O3 Adequacy Response #3 Page 3 July 22, 2025 fields, CR 25, and the horse property and track on the north side of the proposed mine. LGE will continue checking groundwater levels, and if monthly monitoring indicates the ground water level reaches to within 3 feet of the surface, LGE will pursue a remedy to keep it below 3 feet. This may include installing a groundwater drain in the location as this report suggests. 10c. In the comment letter from the Division of Water Resources, they state that the design of lined gravel pits should ensure that they will not individually or cumulatively result in impacts to the timing and quantity of groundwater flow from upgradient locations back to the stream system. Since the operator is not proposing to install a drain at this time, please respond to this comment Ft. Lupton Sand and Gravel Mine and specifically discuss how the timing and quantity of groundwater flow will be affected by the proposed slurry walls in the Northeast and Northwest areas. The attached report contains information addressing the DWR comments. DRMS Adequacy Letter 2 from DRMS Engineering 2/7/2025 In the adequacy response, the applicant did not provide answers to the questions on the second page of Adequacy Letter 2. Please respond to the following . We apologize. We accidentally missed the second page of the Adequacy Review #2. Responses to those missed questions are addressed in this response. 6. The design drawing for the Bank Armoring Plan (Figure 1) does not include a geotextile material or granular filter under the armoring material. Please explain why this standard practice is excluded from the design. When designing the armoring plan we used the UDFCD (now MHFCD) Technical Review Guideline For Gravel Mining & Water Storage Activities (January 2013) manual armoring design criteria, Sec- t ion 2.4 Pit Side Bank Protection beginning on page 15. There is no mention of using a geotextile under the armoring. A granular filter is not needed since the banks of the reservoirs are natu- ✓ al gravel which serves as a granular filter. The armoring Plan says "After the larger material is placed fines will be mixed in t o fill voids"@, This is a commitment to filling the voids be- t ween the armoring material with dirty gravel (pit -run) to reduce o r eliminate erosion and slow water infiltration thru the larger ✓ ip rap.. Environment, Inc. M-1999-120 - AM -03 Adequacy Response #3 Page 4 July 22, 2025 7. More detail is needed to explain the calculations on page 114. a. How was the hydraulic radius R value) determined, and is it associated with a return event, such as the 100 -year event? b. What is the source for the S value of 2.4? c. What is the source for the value of 35 degrees for the angle of repose? d. The S value is defined as "face slope of pitside bank." Is that terminology accurate? a. In 2020 we discussed how to determine the R value for the calculation with Mr. Tim Cazier, PE of the DRMS staff. He provided the explanation that "the hydraulic radius asymptotically ap- proaches the flow depth as the channel widens." In this case the channel width is the length of the smallest rip rap face, over 900 feet long. He suggested just using the flow depth, 2.0 ft. This was obtained from a Drainage Study showing 100 -year flood elevation over the armoring area. b. SS is defined as the Specific Gravity of riprap particles. Or t he ratios of the weight of 1 cubic foot of concrete to 1 cubic foot of water. The Federal Highway Administration P ublication # FHWA-RD-97-148, Table 14-1 lists the SG of Concrete - coarse particles, as being between 2.2 and 2.5. Since we are using average 12" pieces, we used 2.4. c. The MHFCD guidelines define it as "0 angle of repose of pitside bank construction material, in degrees" This is the angle of repose for the D50 concrete rubble as if it were piled into one big pile. This was an average measurement obtained from piles of concrete rubble stored at other mines L GE operates. 35° = 1.4h to 1v. d. That is the terminology used by the MHFCD Guidelines, think of this being the slope of the of the bank along a horizon- t al plane from south to north. In this case the average was measured as a 1% slope (1 ft / 10 0 ft ) . 8. On Map C-1, Plan B has no illustration of armoring. Please revise this map or explain why that illustration is excluded. The inset for Option B was to illustrate the potential configura- t ion of the reservoir areas if some of the intervening structures were removed. The final sloping, grading, shaping and reclama- t ion of the reservoir perimeters remain the same as shown on the larger scale map. I added the armoring to the Northeast Stac-es but they do not show much detail due to the scale. I also added a note to the inset explaining that the reclamation methods explained in Exhibit E will be followed if Option B is used. Environment, Inc. M-1999-120 - AM -03 Adequacy Response #3 Page 5 July 22, 2025 New Adequacy Comments Exhibit G — Water Information 1. In Exhibit G Groundwater Monitoring Plan, page 30, the operator states water level measurements are made in monitoring wells at least once every three months (quarterly, and usually monthly). Additionally, on page 30, LG Everist commits to obtaining water quality samples on a quarterly basis for five quarters prior to exposing water during mining to establish baseline conditions, while subsequent water quality data, obtained annually, will be compared to the baseline data to assess water quality variation. On page 29 (not 30) , Section 3.1 (paragraph 1) - the language on frequency of water level measurements has been corrected. Groundwater level monitoring is done on a monthly basis and will continue until an area is released. On page 30, Section 3.2 (paragraph 3) - the phrase "obtained annually" has been deleted, and additional language was added to specify that any groundwater monitoring plan modifications will only be done through the DRMS Technical Revision process. The final quarter's baseline data was collected in the First Quarter 2025 and is being processed for the final report at this time. I also revised the Exhibit G2n - Monitoring Wells map to correct locations of 3 wells. Per the attached 2024 DRMS Groundwater Monitoring Sampling and Analysis Plan Guidance for Construction Materials, baseline sampling must be sufficient to allow the Division to assess the impacts of the future mining operation on the prevailing hydrologic balance. Groundwater level data for all monitoring wells should be collected monthly and groundwater quality should be collected quarterly. Once site groundwater characterization commences, it will be required that groundwater monitoring will continue for the life of mine. Any modifications to the approved water monitoring plan must be made through the technical revision process with appropriate justification provided by the operator. Water quality sampling frequency will not be reduced to less than a minimum of twice yearly (high flow and low flow data with a collection interval of 5-7 months). Thank you for the information, groundwater level monitoring data has been gathered monthly, and supplied yearly with the DRMS Annual Report since 2015. The groundwater level monitoring and annual reporting will continue until the site is released from the DRMS permit. LGE understands that a Technical Revision will be required to make any changes to the proposed Water Quality Monitoring Plan. Environment, Inc. M-1999-120 - AM -O3 Adequacy Response #3 Page b July 22, 2025 Please revise the monitoring plan to state that water levels will be collected monthly, and water quality samples will be collected quarterly to establish baseline conditions. A Technical revision will be required to reduce the sampling frequency. P lease find a copy of the revised monitoring plan that shows that water level monitoring will continue monthly and a TR will be filed to revise the water quality monitoring plan if our consul— t ant advises that a change will be appropriate. Additionally, a commitment should be made as to how the monitoring data will be reported to the Division. The groundwater monitoring report will include: • Tabulated data for all parameters • Graphs/plots for selected parameters • A narrative analysis of the data, with trends and anomalies identified • A comparison of the observed data to the predictions and to the groundwater quality standards The baseline water quality report will follow the guidelines in t he list you have provided. Exhibit L — Reclamation costs 2. The Division reviewed the cost estimate included in Exhibit L. The estimate does not appear to include the construction of the four slurry walls, grading, topsoiling, and seeding in the Amendment 3 area. Specifically, Table L3, page 88, does not describe the reclamation activity for the Northeast or Northwest areas. Please revise Exhibit L to include the reclamation costs for the Northwest and Northeast areas and resubmit the exhibit to the Division for review. Note, If the Northwest or Northeast areas will be disturbed prior to the release of other mining phases in the existing permit listed on Table L3, the currently held bond cannot be applied to new disturbances to keep the bond at the current level, as suggested at the bottom of page 94.aa Attached is a revised Exhibit L - Reclamation Cost Estimate which incorporates the new information needed to add the cost of the Northeast #1 Phase to the estimate. Page 94 is now page 93 in t his revised Reclamation Cost Estimate and 4 Pages of tables, one for each Phase were added. I also updated some of the unit costs and numbered the Tasks to match page 94. I have prepared a current conditions cost estimate for each of the 8 phases in the northern part of the permit area. Tables Lln thru L8n are the estimated work needed to reclaim the existing Phases including t he Northeast #1 that will be the first to be disturbed of the Amendment areas. Tables 9n, 10n and 11n show the total reclama- t ion costs for the remaining Phases in the amendment area and are provided for future use. Table L3 was updated to add the infor- Environment, Inc. M-1999-120 - AM -O3 Adequacy Response #3 Page 7 July 22, 2025 mation for the Northeast #1 phase and these numbers were used to update on the recap sheet, Page 93. LIST OF ATTACHMENTS TO THIS RESPONSE: Exhibit Exhibit Exhibit Exhibit Exhibit C-1 D - E - F - G2n - Mining Plan Map revised Mining Plan revised Reclamation Plan revised Reclamation Plan Map Revised - Monitoring Wells map Exhibit L - Reclamation Cost Estimate revised Groundwater Model dated revised 7/18/2025 Water Quality Monitoring Plan Revised 6/9/2025 Bank Armoring Plan - revised I hope these responses have addressed the adequacy questions you had. I will place a copy of this packet with the Weld County Clerks' office as required and send you a copy fo the proof of placement. If you have any questions please call me. Sincerely, Environment, Inc Stevan L. O'Brian President cc L.G. Everist, Inc. Weld County Clerk file enclosures L.G. Everist, Inc Ft. Lupton Sand and Gravel BANK ARMORING PLAN This bank armoring plan is presented to explain the bank armoring and slope protection proposed for two mining phases that will be o eclaimed as lined water storage reservoirs, and where mining will be within 400 feet of the western bank of the South Platte River. The bank armoring is intended to protect the finished slopes of the reservoir phases in case of a 100 -year flood event o ccurring after the phase has been reclaimed. The 100 -year Floodplain line information has been included on all of the MAP ExmBITs in the application Packet. The two phases that have mining within 400 feet of the South t latte River are Northeast #1 and Northeast #3. The locations of t he proposed bank armoring in these two phases are shown on MAP EXHIBIT F - RECLAMATION PLAN MAP . Northeast #1 Phase has approximately 1,030 feet of reservoir banks that will be armored, starting at t he southeast corner and going north along the eastern perimeter. Northeast #3 has approximately 900 feet of reservoir banks that will be armored, starting at the southeast corner and going north along the eastern perimeter. Armoring will only be installed on t he inside banks of the reservoirs. Armoring will not be installed on the river bank itself because the river bank is 300 feet or farther from of the top of the slope of the mining limits, the river bank is outside the permit area, and it is not o n land owned by L.G. Everist, Inc. Reservoir Bank Armoring Methods and Materials The finished reservoir banks in Northeast #1 and Northeast #3 will be armored as mining progresses through the Phase. The toe o f the slope armoring will be at least 5 feet below the thalweg o f the South Platte River channel. The base of the armoring will average 8 feet below the existing ground surface at the mine. The armoring will have a 3h to 1v slope and will be 2 feet or more t hick. This will leave an armored face along the top of the bank and the slope into the reservoir that is 31.6 feet wide. This will require approximately 2.35 cyd/lft, along the finished reservoir slopes. Using the formula C= (A2+B2} t'� to determine the armoring length on the slope. Then the unit volume is VT,= (L*W*H)/27cft/cyd; where L=31.6', W=1.0', H=2' Vi,= (31 . 6*1*2)/27=2 . 34cy/lft rounded to 2.35 cy/lft Armoring material will be recycled concrete fragments with surface rebar removed, so that it meets the definition of Inert Materials. The concrete will be sized 9 to 15 inches averaging 12 inches. After the larger material is placed, fines will be mixed in to fill voids. This size of material has a Safety Factor of 1. 2 6 . See the supporting document : BANK ARMORING PLAN - SAFETY FACTOR CALCULATIONS . LGE - FT. LUPTON SAND AND GRAVEL JULY 2025 Ft. Lupton Sand and Gravel Bank Armoring Plan (cant) The bank armoring materials will be installed on 2,000 foot sections of finished reservoir slopes within 3 to 6 months after sloping is completed. At a minimum, 4,700 cubic yards will be stockpiled, on the mine for use in armoring, which is enough to armor a 2,000 feet of finished bank slopes. At no time will there be more than 2,000 feet of armoring needing to be placed. P rior to installing the bank armoring, the stockpile of armoring materials will be placed in the setback area above the reservoir slopes so the materials can easily be pushed into place on the finished slopes. Any stockpiled materials will be placed parallel t o possible water flows, so they will not interfere with water flows in the flood plain if flooding occurs. Cross -Section Drawing The attached FIGURE 1 is a cross section drawing of the bank armoring plan and includes notes of the armoring methods and materials discussed in this section that will be used to protect t he banks along the southeast and east sides of Northeast #1 and Northeast #2 Phases, respectively. Supplied supporting documents Figure 1 - Bank Protection Plan cross section Safety factor calculation page Sources Armoring Plan design is based on the Urban Drainage and Flood Control District Guideline published July 2013, starting with Section 2.4.1- Riprap. The Hydraulic Radius was supplied by Mr. Tim Cazier - DRMS staff e ngineer during the 2020 permitting adequacy review. He explaned t hat "the hydraulic radius asymptotically approaches the flow depth as the channel widens." so the Formula is R=FdF, /2(Fd+F,), where Fd=Flow Depth and FW= Flow width. In this case, the channel width is the length of the smallest rip rap face, over 900 feet long and the depth is 2.0 ft for R. This was obtained from a Drainage Study showing 100 -year flood elevation over the armoring area. Ss is defined as the Specific Gravity of riprap particles. Or the ✓ atios of the weight of 1 ft3 of concrete to 1 ft3 of water. The Federal Highway Administration Publication # FHwA-RD-97-148, table 14-1 lists the SG of Concrete - course particles, as being between 2.2 and 2.5. Since we are using average 12" pieces, we used 2.4. 0=angle of repose of pitside bank construction material, in degrees" This is the angle of ✓ epose for the D50 concrete rubble as if it were piled into one big pile. This was an average measurement obtain from piles of LGE - FT. LUPTON SAND AND GRAVEL JULY 2025 Ft. Lupton Sand and Gravel Bank Armoring Plan (cant) concrete rubble stored at other mines LGE operates. 35° = 1.4h to 1v. S value is defined as "face slope of pitside bank." is the terminology used by the MHFCD Guidelines, think of this being the slope of the of the bank along a horizontal plane along the face of the bank. In this case the average was measured as a 1% slope (1ft/100ft). LGE - FT. LUPTON SAND AND GRAVEL JULY 2025 L.G. Everis t, Inc. March 2025 Ft. Lupton Sand and Gravel M-1999-120 BANK ARMORING PLAN ft 3U SOP OF SCOPE FIGURE 1 SLURRY WALL P ERMIT uISE W BANK VER CHANNEL THALWEG 2,35 cy.cl/l F t 50 40 30 20 10 TYPICAL RESERVOIR NO SCALE NOTES: 1. BANK ARMORING SHOWN ON RECLAMATION MAPS IS APPROXIMATE LOCATION. ACTUAL LOCATION WILL DEPEND ON LOCATION OF TOP OF SLOPE AT THE TIME IT IS INSTALLED. 2. MATERIAL USED FOR ARMORING WILL BE WELL AGED BROKEN CONCRETE. THAT HAS ALL EXPOSED SURFACE REBAR REMOVED. AT A MINIMUM 2,350 CUBIC YARDS WILL BE STOCKPILED ON THE MINE FOR USE IN ARMORING. THIS IS ENOUGH TO MATERIAL TO ARMOR A MINIMUM OF 1000 FEET OF EXCAVATION BANK. 3. STOCKPILES OF ARMORING MATERIAL WILL BE PLACED PARALLEL TO THE RIVERBANK SO IT WILL NOT INTERFERE WITH FLOWS IN THE FLOOD PLAIN. THE STOCKPILES WILL BE PLACED BETWEEN THE PERMIT LINE AND THE TOP OF SLOPE WITHIN 500 FEET TO THE AREA WHERE IT WILL BE PLACED. 0 -10 -20 -30 BANK ARvORING -zzo -275 -230 -280 4. THE BANK ALONG THE EXCAVATED AREA WILL BE ARMORED FROM THE EXISTING SURFACE TO A POINT AT LEAST 5 FEET BELOW THE CHANNEL THALWEG. 5. THE SIZE OF THE MATERIAL WILL FALL IN THE RANGE OF 9 TO 15 INCHES AVERAGING 12 INCHES AS DISCUSSED IN THE BANK ARMORING PLAN AND WILL BE PLACED BELOW GRADE. MAR 17, 2025 - 15: 50: 51 L.G Everist, Inc. Ft. Lupton Sand and Gravel M-1999-120 SF cos 0 tan 0 II n.tan 0+sin 0 = yRS s 2 its = i lLc slope of pitside bank, in do tes to the horizontal angle of repose of pitside bank construction materials in degrees stability factor Ss = specific gravity ofriprap particles 7 = specific weight of water = 62.4 lbS/ft3 .+�50 = median riprap particle size, in feet I = hydraulic radius at normal depth of flow down pitside slope, in feet face slope of pitside bank, in feet per foal Bank Armoring Plan (cont) Safety Factor Calculations 'Y = 62.4 R=2 S = 0.01 TS 1.248 77 1 rs cssai)yDso Z s = 1.248 Ss= 2.4 DS0 = 1 r� 26.2 87.4 n = 0.3 F ._ cos 0 ton 0 ntan 0+sin 9 0 = 18.43° 0 = 35° n = 0.3 cosA = 0.9487 to n0 = 0.7002 sine = 0.3161 SF = 0.6643 0.5262 SF = 1.26 I Exhibit D MINING PLAN Existing Conditions. The methods described and approved in the original mining and reclamation plans for the Fort Lupton Sand and Gravel Mine (FLS&G) 1999 permit, and the 2012 amendment applications will ✓ emain unchanged unless discussed in this text. The Mining Plan described in the 2004 amendment will continue be used with the o nly change being the direction of mining. The other change is t hat mining will continue to the north into the newly added areas before moving to the southern end of the permit area. The future intent is to eventually remove the southern area from this permit into a new application that is being prepared. Map Exhibits C -Current Conditions, C -1 -Mining Plan, C -2 -Struc- t ures and F -Reclamation Plan have been provided in this packet. In the 2012 amendment, LGE combined the Fort Lupton Sand and Gravel Mine (M-1999-120) with the Lupton Meadows Reservoir (M- 2002-104) and added 7 parcels north, south and west of the exist- ing mines. From that time until 2023 the mining Phases in the middle of the permit area have been mined and reclaimed. The area t hat has been released has created a 2 -part mine as shown on the maps. The two (2) new areas to the permit boundary will increase t he permit area by approximately 202.26 acres ±. EXHIBIT C - CURRENT CONDITIONS MAP shows the area being added to the permit and will ✓ eflect any changes to the Mining and Reclamation Plan in the e xisting area. There is very little change to the south area ✓ eclamation plan for the existing area except some of the oil and g as facilities have been removed which will allow for an expan- sion of some of the future reservoirs shapes. Nineteen of the twenty mined areas shown on the maps will be slurry wall lined and developed as a series of water storage ✓ eservoirs ranging from 10.26 to 70.00 acres ±. The exceptions are the Deep Lake Phase that will be reclaimed as a pond and the southern end of the Sandstead Phase that will be backfilled with fines 2 feet above ground water and revegetated. The north end of t he Sandstead Phase may become a lined reservoir. TABLED -1 -MINING TIMETABLE on Page 9 is a list of the mining phases that will be ✓ eferred to in the following text. This timetable has been updated to reflect changes to existing Phases. EXHIBIT B -VICINITY MAP shows the parcels that will be added while the Mining and Recla- mation Plan Maps show how the site will be developed. The total number of phases added to the Fort Lupton Sand & Gravel Mine is four and the new area will add approximately 7-15 years to the life to the mine. It is estimated by adding the new area, along with remaining reserves, that the life of the mine will be from 15 to 25 more years. This life span is subject to fluctuation depending on market conditions. The current bond for Ft. Lupton S&G is $2,002,400.00. The bonds include surety for 20,134 feet of slurry wall and construc- t ion of 16,650 feet of bank sloping. At this time the applicant h as a contract with the City of Aurora to develop 5 water storage ✓ eservoirs on the northern parcels of the property. This in- cludes 256.59 acres of the existing permit area, south of Weld L.G. Everist, Inc. 3 M-1999-120 Ft. Lupton Sand and Gravel Revised -July, 2025 MINING PLAN EXHIBIT D WONT) County Road 18. The Sandstead Phase, the new north areas as well as the southern area, will be marketed by L.G. Everist, Inc. as t hey ar developed. The areas being added have been used primarily as agricul- t ural land. The Northwest Phase is broken into 3 use areas, farm yard with a house, wetland/creek area and agricultural produc- t ion. The house will be removed prior to mining. Mining will t ake place on the yard and agricultural area in this Phase. The t ortheast Phases are mostly grass land with 2 irrigation ditches crossing the site and a small farm yard near the northwest cor- ner. LGE will maintain 50 foot setbacks along the diagonal ditch corridor that has the Meadow Island #1 and the east lateral of t he Lupton Bottoms Ditch. If practical, the north/south leg of t he Lupton Bottoms ditch will be moved to the east side of North- e ast Phase #3 so it can be combined with Northeast Phase #2 as show in Option B. The applicant will bond the amended property in phases, and wishes to retain the option to seal each reservoir with either a slurry wall or a compacted liner, until just prior to bonding t hat particular phase. At the current time, slurry walls have been constructed around the active mining areas and the reservoir slopes are built by backfilling and grading or are in the process o f being completed. TABLED -1 - MINING TIMETABLE has a current list of all certified liners or lined areas being tested. At any given time, mining and reclamation may be occurring in one or more bonded phases to accommodate blending of materials and relocation of the processing plant and settling ponds. There will be times when reclamation is being completed in one phase while mining begins in another phase. Mining will progress from t he existing permit area into the Northeast Phases then move to t he Northwest Phase leaving the Ft Lupton West Phase as the last area to be mined. The arrows on the EXHIBIT C-1 - MINING PLAN MAP show how mining will progress through the mine area at this time. The o rder of mining in the south area will start on the west side and mine to the east jumping from Phase to Phase. The last area to be mined will be the future Plant Site area, see Exhibit C-1 - Mining Plan Map. Optional Mining and Reclamation Plans. Due to the constantly expanding and changing development nature of the oil and gas and other utility operations in this area, L.G. Everist is submitting these Optional Mining and Recla- mation Plans with this amendment to guarantee the flexibility to make changes to mining areas and reservoir shapes throughout the life of the mine. During the current run of mining and reclama- t ion we have seen many changes to the Oil and Gas(O&G) facilities t hat are reflected on the current version of the maps and mining areas. We continue to stay abreast of, and in contact with, the o il and gas and utility companies about future structure and e asement changes, including plans to relocate some of their facilities, plans to remove some of the older wells and facili- t ies, and plans for oil and gas companies to add new structures as their permitting allows. L.G. Everist, Inc. 4 M-1999-120 Ft. Lupton Sand and Gravel Revised -July, 2025 MINING PLAN EXHIBIT D WONT) For example, between 2012 and 2024 many of the wells and facilities on the south area have been removed and the reservoir areas adjusted to show those changes. Many additional changes are expected in the future similar to this example. As mining progresses through the mine and into a new area it may be to our advantage - or we may be required by law to allow o il and gas companies or ditch companies to exercise their rights - to revise the shapes of the reservoirs due to changes to their facilities, gaslines, wells or drilling pads or ditches. These changes may affect reservoir shapes, combine or split reservoirs, add or subtract oil and gas operations areas, gas lines, ease- ments, etc. Therefore, we are presenting these optional plans to cover t he possibilities with the understanding that the mining and ✓ eclamation methods will remain unchanged, but the configurations and areas of the mined and reclaimed areas may change. Optional Mining Plan. Option A - The mining areas shown on the large map on EXHIBIT C-1 MINING PLAN MAP is Option A. This option shows the most conser- vative (and current) mining plan and it assumes no further changes to the location of ditches, oil and gas wells, gas lines o r facilities before mining ends. Option B - The smaller map inset in the upper corner is Option B and is a more optimistic plan showing removal or reloca- t ion of numerous wells, gaslines and facilities to allow removal o f more gravel and increase the amount of water storage on the site. For Option B, the South Area remains as originally planned in 2012 but the new north area may have the ditch moved between t ortheast Phases #2 and #3 to create one large reservoir. Mining Methods overview The working face will be mined near vertical to maximize ✓ emoval of material from the mine. At the widest point, the longest working face will be approximately 1,700 feet long. If mining ended prematurely, this slope will be reclaimed using a cut/fill sloping method instead of backfilling. As mining reaches a setback limit, backfilling will commence within 3 to 6 months maximum so as to leave a 3:1 slope along the mine exterior, oil and gas facilities and the ditches. No more than 2,000 linear feet of side slope highwall area will need backfilling at any -one- t ime. This can be done because we plan to start backfill sloping whenever a new area is stripped so the material only has to be handled once. The mining setbacks will vary from 15 to 275 feet from the permit boundaries, structures and river as allowed by each use agreement of geotechnical analysis for said structures. No mining will be done in the setback areas but they may be disturbed as mining and reclamation progresses thru a phase. For example, around oil/gas wells we will maintain an eighty (80) foot radius around each well head when mining, but leave a 150 foot radius when reclamation is complete. EXHIBIT C-1 - MINING PLAN MAP shows how t his will look. L.G. Everist, Inc. 5 M-1999-120 Ft. Lupton Sand and Gravel Revised -July, 2025 MINING PLAN EXHIBIT D WONT) Around the rest of the mine, the setback line will be to the o uter edge of the slurry wall or the top of the excavation limits. The temporary topsoil stockpiles placed within the setbacks will also limit noise and visual impacts to off site areas. In some cases, the setbacks will be used as a place for roads to access t he mine exterior, ditches and access for the oil and gas facili- t ies. The setback areas will be reclaimed if disturbed. The following information is a recap of the methods currently used at the mine and will continue to be used as mining progresses t hrough the areas added by this amendment. This mine will be operated as a dry -mine. Slurry walls will be constructed to the Division of Water Resources specifications around the perimeter of e ach additional mine area prior to commencement of mining in the new phases. This isolates each mining area from the surrounding t roundwater table and allows for dry -mining of each mine area. However, if a slurry wall is not feasible, the Applicant will utilize a compacted liner to seal the reservoir areas for the end use as water storage. Design of the liner will follow the Divi- sion of Water Resources Guidelines also. Slurry wall design documents were submitted and deemed adequate to the Division in 1999. Slurry walls installed using this design have been con- structed successfully on the 5 lined areas currently complete(and t he 6 already released from the permit). Additional monitoring wells have been installed along the western, eastern, and northern sides of the new areas in the amendment area. Ground water monitoring, and ground water quality t esting plans are included in EXHIBIT G - WATER for the amendment areas. Prior to mining moving into those areas just north of WCR 14.5, the Plant Site will be moved to the Parker #4 Phase in the southern area, adjacent to the access road that now serves the agricultural areas. Mining operations within each new phase area will include t opsoil and overburden stripping, and excavation of dewatering t renches, and settling ponds. Raw materials will be excavated with excavators, front-end loaders, scrapers and/or bulldozers. As areas are cleared and stripped, previously mined slopes will ✓ eceive backfill material to establish the permanent design side slopes. A conveyor is used to transport the raw material from the areas north of WCR 18 to the Plant Site in the existing mine. Explosives will not be used at this operation. The reservoir access roads will be placed in the 25 foot wide setback between the slurry wall and the top of the slope into the ✓ eservoir. The disturbed areas from the setback line to the top o f bank armoring, will be left as a gravel surface instead of being recoiled and seeded. The slope area between the top of slope and highwater line will be recoiled and revegetated. Adequate amounts of the stripped topsoil and overburden will be stockpiled for later use in reclamation in the areas that will be seeded. Topsoil and overburden stripped from subsequent mine areas may be placed directly on the seed bed in previous mine areas so it only has to be handled once and the disturbed areas will be concurrently reclaimed. The exact location of topsoil and L.G. Everist, Inc. 6 M-1999-120 Ft. Lupton Sand and Gravel Revised -July, 2025 MINING PLAN EXHIBIT D WONT) overburden piles are unknown at this time, so we have shown the approximate location on EXHIBIT C-1 - MINE PLAN MAPS . Mining within each phase will begin once topsoil and overbur- den has been removed from that phase area. Excavated materials (pit run) will be removed via front-end loaders, or excavators and may be loaded onto a field conveyor and transported back to the processing plant, or loaded into off -road haul trucks for trans- port to the plant site. Mined slopes will range from near verti- cal to 0.5:1, or as required by the Slope Stability Analysis and Setback Agreements ( see EXHIBIT S - STRUCTURES from the 2004 submittal (included in this packet). As soon as mining limits have been reached in one phase area, reclamation of the pit edges within that phase area will begin. This will allow for concurrent backfilling of the pit perimeter with previously stripped overburden and/or material stripped from t he next phase area to be mined. Access roads built during slurry wall construction and mining will be left as access roads around t he reservoirs or for access to oil and gas wells on the site. Slurry walls have been installed around Swingle North, Swingle South, Ft. Lupton West, Parker-Panowicz and the Blue Ribbon Phases. Testing is complete and certified for all but Blue Ribbon and Swingle South. A slurry wall is planned for the small lake on the north end of Sandstead. We anticipate slurry wall construction will begin soon after permit approval on the North- east Phases. River setback and Bank armoring The only place the South Platte River is within 400 feet of t he mining area is along the east sides of Northeast Phases #1 & #3 in the amendment area and along the east side for the Parker #4 t hase in the south area. Along these stretches the slurry wall will be installed at least 200 feet from the edge of the river bank. Along the South Platte River in Northeast Phases 1 and 3, mining will take place within 300 feet of the river bank and the bank slopes will be backfilled to 3:1. In the Parker #4 Phase the mining limit will be 70 feet west of the Lupton Bottoms Ditch and t he bank will be rebuilt so the top of the slope into the reser- voir area will be 250 feet from the top of the river bank. This will be done by backfilling from the 1/2h:1v mining face to the t op -of -slope (TOS) line using shale and other quality -tested compactible material from the floor of the mined area. On the working face of non river side banks no more than 1,700 feet of 1/2:1 cut/fill sloping and 2,000 feet of 1/2:1 backfill sloping in any one phase will be needed and no more than 2000 feet will need armoring. Armoring will be done, using the technique, and materials described in the BANK ARMORING PLAN in the APPENDIX of t his application packet. Water Diversions and Impoundments The entire site will be graded in phases to direct storm - water runoff towards interior ditches and dewatering systems. A CDPS permit for the existing mine operations is in place from the Colorado Department of Public Health and Environment (CDPHE) for L.G. Everist, Inc. 7, M-1999-120 Ft. Lupton Sand and Gravel Revised -July, 2025 MINING PLAN EXHIBIT D WONT) around the perimeter of each new phase prior to commencement mining. This will seal off each individual phase area, and preventing infiltration of groundwater into the mining area. t he initial groundwater quantities within each mine area are pumped out, continued dewatering will not be required except as -needed basis after significant weather events. t he current dewatering operations. This permit will be modified, if necessary, to accommodate the additional parcels. As the slurry walls are installed, they will be constructed of Once on an Description of Overburden, Deposit and Underlying Stratum Across the entire amendment area, approximately 3 feet of overburden (including approximately 6 to 18 inches of topsoil) will be removed from the mine areas and stockpiled for plant - g rowth material in surface reclamation or used as backfill for the pit slopes. An average thickness of approximately 33 feet of sand and gravel exists across the amendment area. Mining Timetable The continuing uncertainty of economic conditions in the construction materials industry precludes an accurate forecast of demand for materials during the life of the mine. This pit will be operated year -around by L.G. Everist, Inc., weather permitting. There may be periods up to 18 months or more when the demands for material are slow and no mining will take place, creating an "intermittent operation" situation. We therefore, can only e stimate the mining timetable based on an average year and may e xpect a specific year to vary widely from the average. Table D -l: Mining Phases (6-2025) Phases Years ACRES -±- Total Mined Slurry length wall Slurry status of wall (cer- ied date) Fort Lupton Sand and Gravel - North Area Parker-Panowicz 1-2 43.51 20.60 3,540 2/5/14 Swingle North 1-2 42.02 31.88 5,220 11/30/22 Fort Lupton West 2-3 47.81 41.25 4,320 10/13/04 Swingle South 1/2-1 67.45 52.31 6,400 Pending Sandstead done 50.05 36.64 2,945 Proposed Blue Ribbon done 55.55 37.77 5,675 Pending Deep Lake done 7.90 5.75 0 NA South Area Funakoshi 1-3 42.97 27.39 4,770 Proposed Parker #1 1-2 43.17 22.17 4,230 Proposed Adams -Parker 2-3 72.92 43.83 11,755 Proposed Parker #2 1-3 33.27 26.83 4,545 Proposed Parker #3 1-2 43.12 32.71 7,860 Proposed Parker #4 2-3 56.94 44.24 6,235 Proposed New areas Northeast #1 3-4 70.87 57.17 7,350 Proposed Northeast #2 2-3 67.00 45.43 6,880 Proposed Northeast #3 1/2-1 12.12 5.21 2,925 Proposed Northwest 1-2 52.33 27.47 6,220 Proposed Totals 19-34 809.00 558.65 L.G. Everist, Inc. Ft. Lupton Sand and Gravel 8 M-1999-120 Revised -July, 2025 Exhibit E RECLAMATION PLAN Overview Unless specifically discussed below, the methods described and approved in the original Reclamation Plan will remain un- changed. This will remain a dry mining operation. All of the map exhibits have been presented on 2 sheets labeled North area and South area for easier review. When referring to a map ex- hibit it is inferred that both should be reviewed. EXHIBITS C -CURRENT CONDITIONS MAP show the current permit area and the area being added t o the permit. The current post mining land uses are listed as developed water storage surrounded by access roads, gravel surface areas and ✓ evegetated areas. The following information makes change to the ✓ eclamation around the reservoirs. The plan is to reduce the ✓ ecoiling and revegetating. Instead of revegetating to the water line, a gravel surface will be created from the mine setbacks to t he top of slope around the reservoirs. Recoiling and reveg- e tation will be done from the tops of slope to the highwater line, e xcept on bank armoring areas where no cover will be placed on the armoring. A gravel access road will be placed around the reser- voir. Including the slopes into the reservoirs there are three areas that will need revegetation, The scale house triangle in P arker-Panowicz, the area south of and around the Sandstead Reservoir and Deep Lake. All other disturbed areas will have a g ravel surface. More detail is provided in the following Reclama- t ion Plan text and a typical cross section showing this is pro- vided on the EXHIBIT F - RECLAMATION MAP . As with the currently permitted mine area, the new properties will be reclaimed as lined water storage reservoirs. Each of the additional properties will either be sealed with a slurry wall or clay liner. The applicant proposes to bond each phase prior to mining and to determine the type of lining prior to posting a bond f o r that phase. Please refer to TABLE E-1 RECLAMATION TIMETABLE f o r information on each Phase of Reclamation. Reclamation Plan Currently, the undisturbed and amendment areas of the mine site are primarily irrigated agricultural land. The area is broken into 6 different use areas. Please refer to the VEGETATION MAP in EXHIBIT IM - SOILS AND VEGETATION for the location of each area described. The current uses are, mining operations area; non - irrigated pasture; irrigated crop areas; ditch & river corridors & wetland area, oil/gas operations areas and high capacity gas pipeline ROW'S. The agricultural uses will continue as mining progresses until an area is taken out of agricultural production and prepped for mining. There is no native vegetation present on t he agricultural areas because of the intensive agricultural practices that have taken place on the land. In most cases the o il/gas operations areas have little vegetation and the high pressure gasline ROW's have been farmed for many years and vegeta- t ion cover on those areas is consistent with farmed areas. The narrow band along Little Dry Creek/Slate Ditch and the Meadow L.G. Everist, Inc. 9 M-1999-120 Ft. Lupton Sand and Gravel Revised -July, 2025 RECLAMATION PLAN EXHIBIT E (CLINT) Island Lupton Bottoms ditches have been constantly disturbed by ditch maintenance leaving only the river corridor, that will not be disturbed, with vegetation that may be considered native. The t ypical vegetation descriptions that have been submitted in EXHIBITS & J - SOILS AND VEGETATION in previous permitting packets will match t hese agricultural uses as the crops rotate throughout the years. The EXHIBIT F - RECLAMATION PLAN MAP shows a cross section sketch of t he proposed sloping plan and reclamation activities that will surround reservoirs in this plan. Under the contract with City of Aurora for the water storage ✓ eservoirs, the applicant has to turn over to Aurora, for contin- ued development, any reservoirs that have been significantly ✓ eclaimed. It has been agreed that this condition will exist once a reservoir liner has been certified by the Division of Water Resources, sloped, the surround gravel surface is complete. The change to graveling the band between the setbacks and the tops of slope into the reservoirs (or armored areas) eliminates the concerns that during Aurora's development, any revegetated areas would be disturbed, destroying any grass planted. Where mining will take place within 400 feet of the river, a setback of 300 feet on the north area and 250 feet on the south area will be maintained. At which point the slope into the ✓ eservoir will be backfilled and sloped. In these areas no more t he 500 feet will need backfilling nor will it be left open for more than 12 months. Where needed armoring will begin as soon as bank sloping is complete on each 500 -ft section. This will also e nsure, that if mining ceases before the resource is exhausted, o nly a minor amount of work would have to be done to finish ✓ eclamation on the disturbed area Armoring in the Northeast Phases #1 and #3 will progress with sloping, so approximately 2,000 feet will need to be completed at any time. No armoring will be done in the Parker #4 phase on the south area since there is armoring on the river bank anywhere the ✓ iver is within 400 feet of the area to be mined. The BANKARMOR- ING PLAN is in the APPENDIX and explains how and where the armor- ing will be placed. LGE will be working with the Town of Ft. Lupton for direc- t ions on Flood Plain development. This facility is not in an Urban Area, not near public land, or facilities where public safety is a concern so, inlet/outlet structures for private ✓ eservoirs are not needed. There are no plans to install Inlets o r Outlets for the reservoirs. Those will be the responsibility o f the reservoir developers. The following approved seed mix will be used to seed areas where reclamation calls for revegetation. This mix will place approximately 41.2 seeds per pound per sq-ft as prescribed by the NRCS planting guidelines. L.G. Everist, Inc. 10 M-1999-120 Ft. Lupton Sand and Gravel Revised -July, 2025 RECLAMATION PLAN EXHIBIT E (CONY) APPROVED SEED MIX Species Lbs. PLS/Acre Western Wheatgrass (Aribba) Big Bluestem (Champ) Blue Grama (Hachita) Switchgrass (Blackwell) TOTALS 5.00 2.50 0.60 1.75 9.85 The reclamation timetable shows the types and amount of land use in each Phase when reclamation is complete. Approximately 12.20 of the area in the permit will not be disturbed by mining, e ither because it is setbacks around well facilities, gaslines ROW'S, along the ditches or areas too small to mine that will be kept in their natural state. As mining progresses, the perimeter slopes will be backfilled and graded at or near 3h to lv as discussed in the MINING PLAN . This will insure that when mining ceases only a minor amount of work will have to be done to finish reclamation in the disturbed area. The placement of the temporary soil stockpiles around the setback/perimeter of the mined area would be there if needed. Since the area between the liner, the water line and/or top of the armoring will be a graveled surface area, no resoiling will be needed. The graveled surface will mean the above -water -line areas simply have to be shaped and graded. We expect to salvage sufficient topsoil to meet reclamation ✓ equirements. Of the 809.0 acres ± in the permit area, only 42.1 acres ± or approximately 5.7% will need resoiling and revegetated and remaining above water gravel surface will cover 146.5 acres or 18.10 of the area to be reclaimed. The remaining area will be ✓ eservoir area, covered with water or undisturbed area. Observations at the site show that topsoil on the property has a salvageable depth of 6 to 12 inches, averaging 8 inches e xcept in isolated locations. There appears to be more than adequate soils to meet the demand for this site. Setback areas will not be stripped, and the disturbed areas inside the setbacks will not be recoiled. Gravel surface maintenance roads will be built around each reservoir and left around each gas/oil well where no seeding or resoiling will take place. This will provide ✓ oom around each well or reservoir to service it as needed by the well or reservoir owners. Some inert fill (as defined in Colorado Department Public Health and Environment regulations) may be imported for recycling and resale or in rare cases for reclamation purposes. On -site generated inert material will be used for bank sloping, buried in bank areas around the lakes or will be recycled/sold. An inert fill Notice and Affidavit are included in the Appendix for this mine. Existing soils in place have been capable of producing a fairly dense cover of irrigated crops and dryland grasses and should be suitable for use when revegetating the areas where seeding will be done. These areas will be returned to at least their present vegetative condition when reclamation is complete. Under normal conditions, the operator will strive for a 30 to 40 L.G. Everist, Inc. 11 M-1999-120 Ft. Lupton Sand and Gravel Revised -July, 2025 RECLAMATION PLAN EXHIBIT E (CLINT) percent cover rate on the revegetated complete. Under normal weather conditions, will be present for establishment No irrigation will be used during e stablish a vegetation cover that t o survive. Optional Reclamation Plan. We are submitting two ✓ eservoir areas as well. areas when reclamation is an adequate moisture reserve o f the proposed seed mixture. ✓ eclamation since the plan is to is not dependent on irrigation options for final configuration of the Option A - The reservoir configurations for Option A are show on the large EXHIBIT F - RECLAMATION PLAN MAP . Option B - The inset map shows the reservoir configura- tions under Option B. The methods used to reclaim the reservoirs will be the same for both options. The difference may be an increase/decrease in t he volume of developed water storage and an increase/decrease in t he amount of graveling and revegetation necessary. We do not know when the Mining Option B or the Reclamation Option B or some part(s) of either or both will be implemented, but we are including these optional plans to increase the flexi- bility of this permit and account for the inevitable changes when mining the site. Whenever any part(s) of the Option B plans become feasible, we will file a Technical Revision(s) to the Division to provide revised Mining and/or Reclamation Map(s) that will show the changes. The Technical Revision(s) will discuss any changes needed to implement the optional changes, including a discussion on changes in disturbed areas, slurry wall lengths and ✓ evegetated areas. Deep Lake Option Mining has ended in Deep area around the existing lake ✓ evegetated. The town of Ft. o nce it is reclaimed and will augmentation plan. Lake and it will not be lined. The will be graded, shaped and Lupton will receive this property assume responsibility for a water RECLAMATION PERFORMANCE STANDARDS The property will be mined in compliance with the Reclamation P erformance Standards of Rule 6. Grading will be performed to create a final topography that is compatible with the intended final land use. The slopes will vary depending on the final use proposed in a particular area, reservoirs or grassed areas; the ✓ emainder of the area will retain its present drainage pattern. The RECLAMATION PLAN MAP shows how the area will be reclaimed. The pit will be reclaimed so that a suitable grade for drainage exists, all surface runoff will be directed into the ✓ eservoirs created by mining. Settling ponds may be silted in L.G. Everist, Inc. 12 M-1999-120 Ft. Lupton Sand and Gravel Revised -July, 2025 RECLAMATION PLAN EXHIBIT E (CLINT) from wash water, this type of backfilling tends to firm up and stabilize during the first 18 months after being placed. All grading will be done in a manner to control erosion and t o protect areas outside the affected land from slides or other damage. Backfilling and grading will be completed as soon as feasible after mining is completed in a given area. There are no drill or auger holes on the land. Maximum slopes will be within t he limits set forth in the Rules and Regulations of the Board and will be capable of being traversed by machinery. All refuse will be hauled away or disposed of in a manner t hat will control unsightliness and protect the drainage system from pollution. There are no acid-forming or toxic materials involved in this operation. The minimal amounts of petroleum products stored at the site will be stored as prescribed by applicable laws. The storage tanks will be surrounded by a berm o r secondary containment such as storing the tank in a larger metal container adequate to retain any fluid should a tank rup- t ure. In addition, there is adequate absorbent materials on site t o contain any spills that would occur. The operator does not expect prevailing hydrologic conditions t o be disturbed. L.G. Everist, Inc. will comply with applicable Colorado water laws and regulations (as the operator understands t hem) governing injury to existing water rights in order to minimize any disturbance, which might occur to the prevailing t ydrologic balance of the affected land and surrounding areas and t o the quality of water in surface and ground -water systems both during and after the mining operation and during reclamation. In addition, the operator expects to comply with applicable Federal and Colorado water quality laws and regulations. Any water used in the operation of the processing plants and gravel pit will come from water owned by L.G. Everist, Inc. or purchased from an o utside agency suitable for that use. EXHIBIT G -WATER contains specific information concerning impacts and uses of water at this mining operation. This is not a dredge facility, so there are no temporary siltation structures involved in this operation and no mining will be done within the confines of the river. If a U.S. Army Corps of Engineers Permit is required for mining in waters of the U.S., it will be obtained prior to disturbing those areas. Settling ponds will be constructed on the site to collect and recycle water from t he washing operation. There will be no earthen dams on the mined area. The mining and reclamation plans consider existing wildlife use of the site and final reclamation will enhance the area for continued wildlife use. However, creation and management of wildlife habitat is not a specific part of the reclamation plan. Topsoil in the area is good quality and deep enough to salvage what is needed for reclamation. When topsoil is removed t o reach the mineral deposit, it will be segregated and stock- piled. If the topsoil piles remain undisturbed for more than 180 days, the approved seed mix will be planted on the piles or other means will be employed to preserve the topsoil from wind and water e rosion. This will keep it free of contaminants so that it L.G. Everist, Inc. 13 M-1999-120 Ft. Lupton Sand and Gravel Revised -July, 2025 RECLAMATION PLAN EXHIBIT E (CLINT) ✓ emains useful for sustaining vegetation when reclamation begins. The stockpiles will be located in areas where disturbances by ✓ ngoing mining operations will be at a minimum, i.e. along set- backs on the pit perimeter. The topsoil will be handled as little as possible until it is replaced onto areas where needed for ✓ eclamation. We will take measures necessary to insure the stability of the replaced topsoil on graded slopes and ensuring t hat it is spread as evenly as possible. Fertilizer and other soil amendments will be used, only if needed, in accordance with NRCS recommendations. Reclamation will begin once enough area has been opened so t hat any reclamation completed will not be disturbed as mining progresses. This may take one or more years depending on economic conditions and the amount of material mined. By the time mining is completed 75 to 904 of the total mined land will be reclaimed. As mining ends in each reservoir area, only backfilling, grading and shaping of the final mined slopes, bank armoring if needed, g raveling the surface as needed. Where needed, the proposed seed mix will be planted during the next planting season after ✓ ecoiling is completed. The area will be monitored for success of ✓ evegetation until accepted by the Division for release. If ✓ evegetation failures occur prior to release, an analysis of the site will be made and the area will be revegetated again as necessary. Reclamation Timetable The numbers presented below represent our estimate of the various area of disturbance in the mine area. They may change as t he actual mining progresses through the site. L.G. Everist, Inc. 14 M-1999-120 Ft. Lupton Sand and Gravel Revised -July, 2025 RECLAMATION PLAN EXHIBIT E (CLINT) Table E -l: Reclamation Phases (7-2025) Phases Years ACRES ± TOTAL LAKE GRAVEL REVE GE- ROAD MI SC . AREA SURFACES TAT ION (DITCHES, UND I S - TURBED AREAS f ETC . Fort Lupton Sand and Gravel - North Area Parker-Panowicz 3-5 43.51 20.45 9.49 6.28 5.97 2.99 Swingle North 3-5 42.02 29.53 6.86 2.46 1.35 3.33 Fort Lupton West 3-5 47.81 41.39 3.47 2.45 1.54 0.29 Swingle South 3-5 67.45 48.70 12.48 1.39 1.77 4.85 Sandstead 3-5 50.05 10.35 0.00 32.94 2.11 4.65 Blue Ribbon 3-5 55.55 37.04 7.69 2.64 1.54 8.17 Deep Lake 3-5 7.90 3.62 0.00 3.98 0.00 0.30 South Area Funakoshi 3-5 42.97 26.77 4.23 1.79 1.25 10.18 Parker #1 3-5 43.17 20.31 4.86 1.97 1.13 16.04 Adams -Parker 3-5 72.92 47.84 14.76 4.05 3.55 6.27 Parker #2 3-5 33.27 24.77 3.98 2.12 10.22 2.40 Parker #3 3-5 43.12 29.21 8.08 2.58 2.08 3.25 Parker #4 3-5 56.94 43.43 7.92 0.20 1.68 3.60 New areas Northeast #1 3-5 70.87 53.26 8.98 2.48 1.97 5.73 Northeast #2 3-5 67.00 49.45 6.42 7.02 1.84 4.11 Northeast #3 3-5 12.12 3.81 2.58 0.99 0.70 4.33 Northwest 3-5 52.33 22.44 6.10 5.03 1.56 18.76 Totals 809.00 512.37 107.90 80.37 40.26 99.25 L.G. Everist, Inc. Ft. Lupton Sand and Gravel 15 M-1999-120 Revised -July, 2025 L.G. Everist, Inc. FORT LUPTON SAND AND GRAVEL EXHIBIT G2n - MONITORING WELLS r /es". !gill i 4,8filir--; ?La J_ \, . • N . , MW -03n (WQM) O a C t i 1 L \. 0,_. \? ? -1 1: MW -04n (WQM)\MW 58 (WL) Iiiii,��.� ,. Fiturrie sipt.' 4,863 Nlyy00/8 ONL)----= 4r:it MW 11 (W MW 25 (WL) l \.MW 45A (WL) MW 55 WL , o 4362 A • o ,.. Ne; MW -02n (WQM) a all ��• MEI 3 tiD MW 09 (WIT) -.436O A MW -01n (WQM/POC 4&? .MW -61 (WL) .MW 24 (WL) MW 54 (WL) ♦ MW -52 (WL) 14 h.... ,s O 1 1 �• ^µ V •MW 06 (WL) �t MW 20 (WL) soo„---- --,,_) \I zrnitINAW 37 (WL} • 1 ' 1 E I NOTES MATCH 111NE _ 1. Data from existing monitoring water level wells is provided with annual reports. 2. Existing MW locations shown on the map are confirmed via ground check. 3. WQM well locations shown on map are confirmed via ground check. + MATCH LINE WELL KEG' MW 14 (WL) errs-- ." ♦ Site Monitoring Well ■ WQM Well • WQM/POC Well • • _a'� w 5 Q 1 O O AMENDMENT AREA (202.26 AC. ±) EXISTING PERMIT AREA uL 21, 2077 - 10:29:38 Schnabel ENGINEERING T 303.651.1468 / F 303.651.1469 600 S. Airport Road, Suite A-205 / Longmont, CO 80503 schnabel-eng.com TECHNICAL MEMORANDUM TO: Lynn Mayer Shults DATE: July 18, 2025 COMPANY: L.G. Everist, Mountain SUBJECT: Heins Property Groundwater Model Division Revision 1 ADDRESS: 7321 E. 88th Ave., Suite 200, PROJECT L.G. Everist Heins Property Henderson, CO 80640 NAME/NO.: 20020020.06 FROM: Sampson Ash, PG CC: Susan Rainey, PE Victor deWalfe, PE, PG INTRODUCTION This memorandum discusses the groundwater impact analysis at the proposed Heins Property mine site. The purpose of the analysis is to provide information related to the potential impacts to the groundwater table in the vicinity of the site. This includes mounding upgradient and shadowing downgradient of the proposed slurry walls at the site. The site is located approximately three miles north of the town of Fort Lupton, Colorado. The mine plan for the site consists of two main mining areas (North and South) divided by the Meadow Island Ditch and, when constructed, the relocated east branch of the Lupton Bottom Ditch. There is a possible third or West cell. Slurry walls will be constructed around the perimeter of each of the planned cells to cut off groundwater, as shown on Figure 1. A standard offset of 200 feet from the river, and 15 feet from property lines, rights -of -way or utilities were used for the proposed slurry wall alignments. Groundwater modeling was conducted to evaluate the impact of the proposed slurry walls on groundwater levels. The objectives of the groundwater modeling are to: 1. Approximate the existing hydrogeologic conditions pre -slurry wall using available data. 2. Simulate the hydrogeologic effects of the slurry walls by predicting potential groundwater mounding upgradient of the property and shadowing downgradient. To satisfy these objectives, five steady-state (equilibrated) groundwater models were constructed for: 1. Pre -slurry wall conditions 2. Post -slurry wall construction conditions This modeling memorandum presents the geologic setting; a general site conceptual model of the aquifer system; the groundwater modeling software used; construction of the model; calibration of the model in terms of target residuals and mass balance; and finally, a discussion of the predictive simulations and conclusions. The groundwater modeling was conducted in general conformance with ASTM standards for groundwater modeling. L.G. Everist Heins Property Groundwater Modeling GEOLOGIC SETTING Geotech nical Investigations The general subsurface lithology at the Heins Property consists of one to two feet of overburden at the surface, underlain by alluvial sand and gravel deposits ranging between 21.5 and 45.5 feet thick, followed by weathered Laramie Formation bedrock measuring about two feet thick, and finally less weathered Laramie Formation bedrock. The bedrock consisted of claystone, shale, and fine-grained cemented sandstone which are fine-grained rock types and therefore have a low hydraulic conductivity. The total depth to bedrock for the site was estimated to vary from about 23.5 to 47.5 feet deep or elevations 4812 to 4848 feet, respectively. The groundwater depths on the property range between 0.2 to 10 feet below ground surface or between elevations 4853 to 4869 feet, and the aquifer had a saturated thickness ranging between 16 to 30 feet. Subsurface lithology data was obtained from the geotechnical investigation on the property, consisting of 26 borings, performed by Schnabel Engineering between September 23, and October 10, 2024. These boring locations are shown on Figure 1. The information from this investigation was used along with existing data from other projects in the domain to create the bedrock contours used in the groundwater model. Site Conceptual Model The site conceptual model of the South Platte Alluvial Aquifer as shown in Diagram 1 below consists of two layers, the unconfined sand and gravel of the South Platte Alluvial Aquifer and the Laramie Formation. The overburden was removed from the model for simplification. Even though this material has a lower hydraulic conductivity it is insignificant in the contribution of the model. The highly conductive Alluvial Aquifer has an estimated hydraulic conductivity of 500 ft/day (0.17 cm/sec) (CDWR, 2024) and is bounded on the bottom by the fine-grained rock of the Laramie Formation. The Laramie Formation has an average hydraulic conductivity of 3.2x10-3 ft/day (1.2x10-6 cm/sec) as determined by packer testing during the geotechnical investigation. The rocks that comprise the Laramie Formation have a low hydraulic conductivity. In the model it acts as a no -flow boundary due to the orders of magnitude of difference in hydraulic conductivity between the two layers. WEST Edge of Alluvial Aquifer South Platte Alluvial Aquifer —Sands andGravels i Shirr.., 'i"r' c: �''. Laramie Formation—Claystone, Shale, and Fine GrainedCemented Sandstone EAST South Platte Rhter Diagram 1 — Site Conceptual Model NI ri$t;, SC A6� Project 20C26026.06 / July 18, 2025 Page 2 Schnabel Engineering L.G. Everist Heins Property Groundwater Modeling The primary sources of inflows into the alluvial aquifer are: 1. Subsurface inflow from the upgradient end of the aquifer and tributary valleys 2. Infiltration of precipitation and irrigation 3. Seepage from unlined ditches or reservoirs (depending on time of year) The primary sink or area of outflow from the alluvial aquifer is the South Platte River because it is a gaining stream. However, water outflow from the aquifer also includes: 1. Seepage into unlined reservoirs or mines 2. Seepage into unlined ditches (depending on time of year) 3. Well withdraws 4. Subsurface outflow at the downgradient end of the aquifer The model domain encompasses the South Platte River alluvial floodplain between Weld County Road 14 in the south and Weld County Road 24 in the north. The domain is set between the confluences of Big Dry Creek and Little Dry Creek within the South Platte River valley (Figure 2). The western boundary is set at the extent of the Alluvial Aquifer which is correlated to Elevation 4900 feet. The South Platte River is the primary surface discharge for groundwater in the area and is set as the eastern boundary of the model. The ditches and unlined ponds are drains in the model domain that can add or remove water to the aquifer depending on the head differences. Drains with outflow, for example, Little Dry Creek, return outflows to the South Platte River by surface flow and/or seepage into the aquifer. The topography slopes gently down from south to north along the valley. The project area exhibits widespread aggregate mining where slurry walls and/or clay liners (low permeable barriers) have been installed. These low permeability features act as hydraulic barriers and redirect groundwater flow, creating mounding on the upgradient sides and shadows on the downgradient sides. Land use in the area consists of mining and agricultural uses. ANALYSIS APPROACH - STEADY-STATE GROUNDWATER MODELING Overview The Heins groundwater model was developed using a combination Geographic Information System (GIS) database and GIS data analysis techniques (ESRI, 2024) as well as Leapfrog geologic modeling to create model layers (Leapfrog Geo, 2024). That data was then imported into the software Groundwater Vistas Version 7.0 (Rumbaugh & Rumbaugh, 2015), a graphical user interface for MODFLOW. Groundwater Modeling Software The MODFLOW-2005 computer code was used to simulate groundwater flow by solving the 3 -dimensional groundwater flow equation using a finite -difference method where the model domain is subdivided into a grid of cells, and the hydraulic head is calculated at the centroid of each cell (Harbaugh, 2005). Groundwater flows into and out of the model via head -dependent flux boundaries. These flows are calculated in the same manner for each simulation. Pre- and post -processing of MODFLOW-2005 files were completed using Groundwater Vistas. Groundwater Vistas is a graphical Project 20C26026.06 / July 18, 2025 Page 3 Schnabel Engineering L.G. Everist Heins Property Groundwater Modeling user interface that facilitates model construction, runs MODFLOW, data analysis and data presentation. It summarizes results as contours, shaded contours, velocity vectors and detailed mass balance analyses. This section discusses the modeling assumptions, limitations, solution techniques, and the way that they affect the models. When analyzing the groundwater flows in the model, as implemented, MODFLOW-2005 simulates the system as an unconfined aquifer with one value of hydraulic conductivity. One limitation is that cells can go "dry" or "flood". If the calculated head is above the top of the aquifer (ground surface) at any model cell, then that cell is flooded and will be treated as if the aquifer is confined (i.e., the saturated thickness will equal the top -elevation minus the bottom -elevation). If the calculated head falls below the bottom of the aquifer, that cell is dry and will be assigned a zero value for hydraulic conductivity. The preconditioned conjugate -gradient with Newton (PCGN) solver package of MODFLOW-2005 was used to solve the groundwater flow equations for the model. It combines the efficiency of the conjugate gradient method with Newton-Raphson iteration to handle nonlinearities commonly found in unconfined aquifers and head -dependent boundary conditions. The solver uses preconditioning techniques to improve convergence speed and stability, making it well -suited for large, complex, and nonlinear models where traditional solvers like PCG or SOR may struggle. This package defines the number of outer and inner solver iterations, as well as criteria for both maximum head and residual change between iterations before allowing convergence. Tolerances for the maximum change in head and flow residual between iterations were specified as 1x10-3 feet and 100 cubic feet per day (cfd), respectively. These tolerances result in a mass balance of less than 0.001%, indicting model convergence and solution accuracy. Steady-state conditions were simulated because the maximum water level rise is of principal interest and the time required to reach steady state is not of concern. Model Geometry and Spatial Discretization The model was constructed by importing shapefiles made in GIS representing aquifer parameters and boundary conditions into Groundwater Vistas. The model domain is a rectangular area 12,760 feet wide by 23,120 feet long (Figure 2). The domain was divided into a grid of cells measuring 10 feet on each side. Active cells contain values representing the following parameters: 1. The elevation of the top of the aquifer 2. The elevation of the bottom of the aquifer 3. The hydraulic conductivity of the aquifer 4. The recharge applied to the cell 5. The initial groundwater head within the aquifer 6. The boundary conditions for the model Layer Construction The maximum top of the alluvial aquifer is represented by the topography of the ground surface. Topographic data used for this model input are from a 1 -meter digital elevation model (DEM) obtained from the Colorado Hazard Mapping & Risk Map Portal (CWCB, 2024). Project 20C26026.06 / July 18, 2025 Page 4 Schnabel Engineering L.G. Everist Heins Property Groundwater Modeling The bottom of the aquifer and model is the low permeability Laramie Formation bedrock. Therefore, the model contains an elevation map of the bedrock surface. To create this surface, bedrock elevation data was obtained from the geotechnical investigation described previously in this memo, data from previous projects done for L.G Everist in the area, and publicly available data from Colorado's Decision Support Systems (CDWR, 2024). The bedrock elevations were contoured in AutoCAD. Overall, the spatial reliability of the bedrock data is considered good and deemed appropriate for the scope of this groundwater model. The DEM and the resulting bedrock elevation contour map were imported into Leapfrog to create the top and bottom of the alluvial aquifer. Due to the 10x10 foot grid size used, the topographic and rock elevation data were averaged within that area resulting in some variation between model elevations and contoured ground/rock elevations. Aquifer Properties The horizontal hydraulic conductivity (Kx and Ky) of the alluvial aquifer used in the model was input between the range of 500 feet per day (fpd), and areas with known wash fine fill had an input of approximately 50 fpd. This value is based on average values from the Colorado Decision Support Systems GIS map and our experience in the area. We assumed an anisotropy ratio of 0.5 (Kv/Kr), meaning that the value in the vertical direction (Kv) is half the value in the radial direction (Kr). A groundwater elevation contour map for the alluvial aquifer provided the starting heads for the finite difference solution and was used to define general head boundary values. This surface was developed using the groundwater level data collected from monitoring wells in the area. This consists of wells owned by LG Everist on -site and off -site. Boundary Conditions The boundary conditions listed below define the sources and sinks for the water budget of the model. The system is assumed to be in equilibrium under pre -slurry wall conditions. The model domain is inactive outside of the defined boundary conditions. These boundaries are shown on Figure 2. Exterior Boundary Conditions The exterior or the outer boundary conditions used for the model include three general head boundaries, two no -flow boundaries, and the river boundary: General Head Boundaries 1. Subsurface inflow from the upgradient portion of the alluvial aquifer (Southern Boundary). 2. Subsurface outflow from the downgradient portion of the alluvial aquifer (Northern Boundary). 3. Subsurface inflow from the tributary valley of Little Dry Creek (Part of the Western Boundary). These edges of the aquifer were chosen to be modeled by the MODFLOW General -Head boundary package to allow groundwater to flow into and out of the model and to permit groundwater elevations to change at the boundaries in response to aggregate mining. Project 20C26026.06 / July 18, 2025 Page 5 Schnabel Engineering L.G. Everist Heins Property Groundwater Modeling No -Flow Boundaries 1. The edge of the South Platte Alluvial Aquifer (Part of the Western Boundary). 2. The contact between the South Platte Alluvial Aquifer and Laramie Formation (Bottom Boundary). The base and most of the western side of the model are simulated using the no -flow boundary (inactive cells) to represent the contact between the low -conductive Laramie Formation and the alluvial aquifer. River Boundary 1. The South Platte River (Eastern Boundary). The elevations of the river were determined using river gauges near the site to estimate starting and ending elevation. The South Platte River was simulated using the MODFLOW River package, which contributes water to or releases water from the aquifer at adjacent cells as determined by the hydraulic gradient between the aquifer and the river and as a function of streambed conductance. The unlined reservoirs or ponds within the model domain were also modeled as river boundaries. Interior Boundary Conditions Interior boundaries or inner boundaries included 6 drains, 8 no -flow boundaries, and 11 constant head boundaries: Drains The ditches, unlined ponds, intermittent stream (Little Dry Creek), and the drain at the Zadel Pit within the model were simulated using the MODFLOW Drain Package which removes water from the adjacent cells as determined by the hydraulic gradient between the aquifer and the ditches and stream as a function of drain conductance. No -Flow Boundaries Aggregate mines that have installed slurry walls and/or clay slope liners around their properties were simulated using the no -flow boundary (inactive cells) as their contributions to the aquifer are negligible. CALIBRATION Calibration Process Model Calibration is an iterative process of adjusting model parameters (aquifer properties) and boundary conditions to obtain a reasonable match between field measurements and model -computed values. Calibration was conducted for the steady-state models, which is assumed to represent conditions observed during the months of August 2024 and March 2025. August 2024 was used to calibrate flows from the Lupton Bottom West Branch Ditch and measured piezometric heads while the March 2025 calibration was used to calibrate the model to piezometric heads recorded after the installation of the Zadel Pit Drain. Project 20C26026.06 / July 18, 2025 Page 6 Schnabel Engineering L.G. Everist Heins Property Groundwater Modeling The calibration targets for the two different models include the measured groundwater elevations observed in 34 monitoring wells (Figure 2) measured during the month of March 2025, and from 22 groundwater measurements taken during the geotechnical investigation described above. The monitoring wells were the primary targets as they were recorded on specific dates, offering high reliability and spatial relevance; while the geotechnical borings and publicly available data were secondary targets as they included data outside the time frame of calibration, which while useful for broader context is considered less reliable due to potential inaccuracies and differences in aquifer conditions. The model was calibrated primarily to the project -specific data, with the secondary dataset used to support regional trends and assess model robustness. Model calibration acceptability is subjective, but the following general guidelines for judging calibration sufficient for this model included: • Overall calibration quality is determined through statistical comparison of model results with field measurements and observations. This model includes only water elevations. • The primary statistic used in gauging and reporting "best fit" was the squared error of the measured and computed groundwater elevations. • Calibration continued until the coefficient of determination (R2) between the measured and observed groundwater elevations was within 10% of 1. The goals of the predictive simulation targets are: 1. To show how field measured groundwater heads differ from those in the steady-state simulation. 2. To show how pre -slurry wall groundwater heads differ from those in the predictive simulations. Calibration Results The model is simple and homogeneous, containing heads that are well constrained by measured values for boundary conditions as well as a reasonable estimate of hydraulic conductivity. The calibration targets used for the pre -slurry wall condition steady state model illustrate that the input groundwater heads are generally within five feet of the measured values throughout the entire model. However, near the site where the mounding is expected the modeled heads are within two feet of the observed heads. Calibration plots for the two calibrated models show the residuals (Observed Head Values Vs. Modeled Head Values) for the site specific and publicly available data in Figure 3. The calibrated models both resulted in an R2 value of 0.99 at the end of the calibration process. In Figure 4 the groundwater elevation contours for the steady state calibrated model are shown. Figure 5 shows the data in terms of groundwater depth below ground. The mass balance reported by MODFLOW for the steady state pre -slurry wall model in March 2025 is as follows: March 28, 2025 Inflows = 1,214,888.2 cfd Outflows = 1,222,461.4 cfd Difference = - 7,573.2 cfd (-0.6`)/0) Project 20C26026.06 / July 18, 2025 Page 7 Schnabel Engineering L.G. Everist Heins Property Groundwater Modeling This illustrates that the initial steady-state model is accurately solved. Because the pre -slurry wall groundwater table represents data from measured groundwater levels, and the mass balance is accurate, this suggests the model is sufficiently calibrated to be used for predicting water levels after construction of the slurry walls. PREDICTIVE SIMULATIONS Using the steady state model for pre -slurry wall condition as the base model, predictive simulations were performed for groundwater mounding after the proposed slurry walls are constructed. Predicted Unmitigated Groundwater Mounding To understand the magnitude and extent of potential groundwater mounding upgradient of the Heins slurry walls, a steady state simulation including slurry walls was performed. The pre -slurry wall model was changed by inputting the Heins slurry walls as no -flow boundaries. All other aquifer parameters and boundary conditions remained unchanged. Initial heads were the model simulated heads from the pre -slurry wall steady state model. The steady state model for the post -slurry wall conditions generally produced higher groundwater elevation heads than those produced for the pre -slurry wall steady state condition. The groundwater elevations from the predictive simulation are shown in Figure 6. The difference between the pre- and post -slurry wall groundwater surfaces are the predicted mounding levels shown on Figure 7. For each of the predictive simulations, positive residuals are reported as values of groundwater mounding (warm colors) and negative values represent groundwater shadowing (cool colors). For this predictive simulation the magnitude of the maximum groundwater mounding is approximately 2.5 feet west of the Heins West and Zadel Pit. For the Southern Slurry Wall Complex in this predictive simulation, the magnitude of groundwater mounding ranges from 1 foot on the southern side to maximum groundwater shadowing of 3 feet in the middle of the complex near Little Dry Creek on the north side. The groundwater is closest to the surface on the west side of the Heins west cell as well as on the west side of the southern slurry wall complex as shown in Figure 8. CHANGE IN DISCHARGE TO ACCRETION BOUNDARIES The installation of slurry walls around the site can impact groundwater flow dynamics, resulting in changes to discharge at accretion boundaries. By reducing horizontal hydraulic connectivity of the aquifer, the slurry walls have modified the natural flow regime, limiting groundwater movement into and out of the enclosed area. As a result, discharge patterns at accretion boundaries have shifted, particularly along downgradient zones where the walls intersect historic flow paths. These changes were incorporated into the groundwater model by updating boundary conditions and representing the slurry walls as zones of low permeability or no -flow barriers. The model was subsequently recalibrated using observed groundwater levels and flow data to ensure it reflects post -construction conditions. A summary of the changes in flow at accretion boundaries is provided in Table 1 below. Project 20C26026.06 / July 18, 2025 Page 8 Schnabel Engineering L.G. Everist Heins Property Groundwater Modeling Table 1 - Change in Discharge to Accretion Boundaries Name Boundaries from Discharge Lupton into without Bottom Accretion Recharge (CFD) Difference (CFD) Difference (CFS) Difference (GPM) Prior Construction to After Construction South Platte 243,407.9 231_,1.89.7 -12,21.8.2 -0.1 -63.5 Little Dry Creek 199258.9 551.69.3 -144,089.6 -1_.7 -748.5 Lupton Bottom Branch Ditch west 0.00 0.00 0.0 0.0 0.0 Lupton Bottom Branch Ditch East 89,028.5 148,144.0 59,115.5 0.7 307.1 Meadow Ditch 0.00 153,656.0 1.53,656.0 1.8 798.2 Coal Ridge 0.00 1,806.9 1,806.8 0.0 9.4 Unlined Pits 393,839.4 293,221.9 -100,617.5 -1.2 -522.7 Alluvial (Groundwater Underflow Flow) 153,275.1 121,267.2 -32,007.9 -0.4 -166.3 Totals 1, 078, 809.8 883,1.87.8 58, 270.5 0.67 302.70 As shown, there is a small increase of about 300 gpm in the discharge to accretion boundaries with Heins slurry walls installed. The results illustrate that construction of the proposed slurry walls has a negligible impact on groundwater accretion to the South Platte River. Additionally, the outflows reported for Little Dry Creek flow into the South Platte River outside (downstream) of the model domain. CONCLUSIONS This groundwater impact analysis was performed to evaluate the mounding and shadowing effect the construction of slurry walls has on the local groundwater table. The model accurately replicated the conditions of the South Platte River alluvial aquifer based on data available from recent geotechnical investigations. Model construction was facilitated by using an extensive GIS to inventory, analyze, and present the data. The steady-state models reasonably simulated the equilibrated hydrogeologic changes caused by construction of the slurry walls. The predictive simulation during irrigation season showed that the magnitude of the maximum groundwater mounding and shadowing for proposed slurry walls can cause mounding as high as about 2.5 feet, and a minimum depth to groundwater of about 0.5 feet, before a drain is installed. The simulation also indicates that the maximum shadowing effect caused by the construction of the slurry walls is almost three feet and is located along Little Dry Creek in the middle of the Fort Lupton Pits. The groundwater flow pathways for return flows to the river have been lengthened due to slurry wall installation, the differences between flow paths can be compared in Figure 4 and Figure 6. These lengthened flow paths can increase the timing it takes for groundwater to return to the South Platte River. However, as the results show, the change in outflows to the South Platte River is negligible between pre - and post -slurry wall conditions. Project 20C26026.06 / July 18, 2025 Page 9 Schnabel Engineering L.G. Everist Heins Property Groundwater Modeling RECOMMENDATIONS The installation of the Heins North and Heins South cells on the eastern side of the property have minimal effect on the surrounding groundwater. No drain installation is recommended for these areas at this time. The site wells will be monitored approximately monthly. If the depth to groundwater, following the construction of the slurry wall(s) in any exterior well approaches three feet below ground surface, we recognize that a drain may need to be installed. The Heins West cell of the Northern Heins complex as well as the Southern complex have shown to cause a considerable amount of mounding. To mitigate potential groundwater mounding caused by the reduced flow through the slurry walls, a subsurface drain may be required. If groundwater levels rise to approximately three feet below the ground surface near the exterior of the slurry wall, the drain will be necessary to maintain hydraulic gradients, prevent excessive buildup, and ensure continued groundwater movement. The drain would help relieve pressure, reduce the risk of seepage or surface expression of groundwater, and maintain the effectiveness of the overall groundwater control system. LIMITATIONS These are steady-state models and cannot be used to evaluate groundwater return flow timing. The results of the groundwater modeling and conclusions drawn from them represent approximations and are based on the best available data and engineering judgement. Conservative assumptions were made during the calibration process so that groundwater mounding was not under -predicted. Given the unknown heterogeneity of the aquifer in the field and variations in ground surface from the topographic data used, the groundwater mounding and/or drainage mitigation may deviate from the model simulation. There is a possibility that mounding may be higher than predicted, although the conservative assumptions of this work make the deviation toward a lower mound in the field a more likely possibility. REFERENCES CDWR. (2024, November 19). Map Viewer. Retrieved from Colorado's Decision Support Systems: https://maps.dnrgis.state.co.us/dwr/Index.html?viewer mapviewer CWCB. (2024, November 20). Colorado Hazard Mapping & Risk MAP Portal. Retrieved from Colorado Hazard Mapping: https://coloradohazardmapping.com/Iidarpownload ESRI. (2024, November 20). Retrieved from ArcGIS Pro: https://www.esri.com/en- us/arcgis/products/arcgis-pro/overview Harbaugh, A. W. (2005). MODFLOW-2005, The USGS Modular Ground -water Model - - the Ground - Water Flow Process. Rumbaugh, J. O., & Rumbaugh, D. O. (2015). Guide to Using Groundwater Vistas. Seequent, The Bentley Subsurface Company. (2024, November 20). Leapfrog Geo. Retrieved from https://www.seequent.com/products-solutions/leapfrog-geo/ Project 20C26026.06 / July 18, 2025 Page 10 Schnabel Engineering 0 200 400 600 Feet scALE:1 inch =500 feet 11. Friday, June 13, 2025 02:32 PM • Legend Boring Locations South Platte River Drains Model Domain Unlined Reservoirs or Lakes Zadel Drain Slurry Walls Cott/ eo C� �cck HEINS WEST HA -01 MPa NCC ZADEL PIT H-10 H-11 H-12 H -01 HEINS NORTH H-13 HEINS SOUTH H-02 H-03 LG EVERIST BLUE RIBBON _ — — - Lu ptondBottom� Coal Ridge Ditch East Branco HEINS PROPERTY GROUNDWATER MODEL Boring Location Plan FIGURE NO. 1 DATE: 6/13/2025 I PROJECT NO.: 20026026.06 O: ILongmont12020120C26026.06 Heins Property103-SE Products107-GIS1Heins Property 060925.aprx Wednesday. July 16, 2025 02:59 PM %et Legend General Head Boundary Relocated Lupton Botton Ditch East South Platte River Drain Boundary Model Domain Unlined Reservoirs and Lakes Zadel Drain Lupton Bottom Ditch West Proposed Drains i_ ti Slurry Walls NCC ZADEL P z LG EVERSIT BLUE RIBBON 1 w FORT LLIPTON 1,500 3,000 Feet SCALE: 1 in = 1,500 feet Heins Property Groundwater Model Model Domain and Boundary Conditions Km No: 20O26026.06 I DATE: 7/16/2025 FIGURE NO. 2 4895 Calibration 08-28-2024 4890 • 4885 • • • • 4880 • • ---, •4-a 414875 • � o. 4:94870 a • 4865 • • =1.0088x 42.743 - •••Y — R2— 0.988 4860 e • • .) • . • • 4855 v� v • ••, 4850 4850 4855 4860 4865 4870 Observed 4875 Values 4880 (ft) 4885 4890 4895 Note: Schnabel HEINS PROPERTY Calibration GROUNDWATER Plot MODEL FIGURE NO. ENGINIFFDPN JOBN°�'oC26o26.06 DATE: 06/10/2024 © Schnabel Engineering, LLC. 2024 All Rights Reserved s_Property_060925. aprx 1 Legend Groundwate low Directio Groundwater Elevation Contour (C.I. = 5ft) Lupton Ditch South Platte River Zadel Drain Ditch Drains Model Domain li Slurry Walls Lakes is. 0. espy 2,000 4,000 Feet 0 E N G I N E E R I N G Schnabel HEINS PROPERTY GROUNDWATER MODEL Existing Conditions Steady State Results 7/16/2025 PROJECT NO. 20026026.06 I FIGURE #') © Schnabel Engineering, 2025. All Rights Reserved. x L Q tri O O CO O I L 0 Q O L I s 2 U ti O U O /�L LL I rW O a) Q O nL I _ cn •0- 2 O O N O CO N U O N 0 N O N O O J / b N 0 N M Legend Depth to Groundwater (C.I. = 5ft) Lupton Ditch South Platte River Zadel Drain Ditch Drains Model Domain Slurry Walls Lakes Depth to Groundwater (Feet) 69 0 0 ENGINEERING Schnabel HEINS PROPERTY GROUNDWATER MODEL Existing Conditions Depth to Groundwater 7/16/2025 PROJECT NO. 20026026.06 I FIGURE #5 © Schnabel Engineering, 2025. All Rights Reserved. 2,000 4,000 Feet L' ct,:i•he t -7)Ft I: 1V Legend Monitoring Wells Ditch Drains Groundwater Elevation (C.I. = 5ft) Model Domain Lupton Ditch Slurry Walls South Platte River Lakes Zadel Drain 0 E N G I N E E R I N G Schnabel HEINS PROPERTY GROUNDWATER MODEL Predictive Simulation Results 7/16/2025 PROJECT NO. 20026026.06 I FIGURE #6 © Schnabel Engineering, 2025. All Rights Reserved. s_Property_060925. aprx k Legend Lupton Ditch South Platte River Zadel Drain Ditch Drains Model Domain Lakes O Slurry Walls Change Contours (C.I. = 1 ft) Change from Existing Results (Feet) 3 -3 4,000 Fee Schnabel ENGINEERING HEINS PROPERTY GROUNDWATER MODEL Predictive Simulation Change from Existing 7/16/2025 PROJECT NO. 20026026.06 I FIGURE #7 © Schnabel Engineering, 2025. All Rights Reserved. s Property_060925.aprx s Property\03-SE_Products\07-GI 6/13/2025 O:\Longmont\2020\20C26026.06 H Legend Depth to Groundwater (C.I. = 5ft) Lakes Lupton Ditch Slurry Walls South Platte River Depth to Groundwater Zadel Drain (Feet) Ditch Drains 700 Model Domain az:,i 2,000 eaENGINEERING N 4,000 dr. Feet Schnabel HEINS PROPERTY GROUNDWATER MODEL Predictive Simulation Depth to Groundwater 7/16/2025 PROJECT NO. 20C26026.06 FIGURE #8 © Schnabel Engineering, 2025. All Rights Reserved. EXHIBIT L RECLAMATION COSTS The bond currently held by the Division for the existing mining operation is adequate to do the reclamation needed at the existing stages in mine at this time. Since the plan is to add a liner to the Sandstone pond in the future and start liner construction in the Northeast #1 Phase this fall, we have revised the cost estimate to include those two liners and associated work and costs to reclaim the existing stages in their current state of disturbance. Tables L -1n to L -8n and Tables L -9n to L -11n show the areas and cost to reclaim each P hase in the northern permit area. Current bond information: Fort Lupton Sand & Gravel Mine $ 2,002,400.00 The following recap explains the changes to the site that we have d iscussed in detail throughout this amendment application. These changes may affect the reclamation bond. The current conditions d iscussion following this section has tables showings the remaining activities to be used in estimating the financial warranty needs at t his time. The applicant asks the Division to include the following items in its Circes© bonding calculations for this amendment: Bonding Decrease Reclamation Work completed (noted as of 10/21/2024) • Swingle North (2022, )Parker-Panowicz (2014) and Ft. Lupton West (2004) areas - slurry walls certified by the DWR (13, 080' ); • Swingle -South - installed slurry wall (certification test in progress, 6400 ft) • Blue Ribbon - installed slurry wall (certification test in progress, 5675') • Backfilling, sloping and grading is done on Blue Ribbon, Swingle North and parts of Swingle South and Parker-Panowicz. Possible Bonding Increase Installed slurry walls • Sandstead - bond to install slurry wall (2945 ft) • Northeast #1 - bond to install slurry wall (7350 ft) In conjunction with the installation of the new slurry walls, t here were necessary surface disturbances including (a) the working platform that is built for the equipment that is constructing the slurry wall, (b) areas where the material was t aken from to construct the platform, and haul roads between the slurry wall platforms and the material gathering areas. These areas will need only grading and seeding. Mining in Existing area All of the areas currently in the mine are bonded for surface disturbance, liner installation and reclamation. Mining is complete in Parker-Panowicz, Swingle North, Deep Lake and Blue Ribbon and all sloping is done. In Swingle South and Ft. Lupton West mining continues. Current Conditions This reclamation cost estimate is based on the assumption that at the current time no more then 300.00 acres will need some form of L.G. Everist, Inc. M-1999-120 Ft. Lupton Sand and Gravel Revised -July, 2025 88 RECLAMATI❑N COSTS EXHIBIT L (C❑NT) ✓ eclamation at any -one-time. Of this, 45.78 acres will be gravel surface area needing only grading, 78.82 acres requiring resoiling and seeding and there is 157.97 acres of future reservoir area that needs n o work to reclaim. There is sufficient amounts of growth medium in Swingle South to place 8 inches on the above water area in Parker - t anowicz, the above water area in Swingle South, the backfilled area in Sandstead, Deep Lake and on the Plant Site. The Tables Ll, L2, and L3 contain all the base information used t o calculate this estimate. The disturbed areas include, the plant site; roads; slurry wall construction pads and staging areas; gravel surfaces on the above water areas around certified reservoirs and Blue Ribbon. Also the active mining areas that are stripped, partially mined or partially reclaimed areas. There are three Division of Water Resources (DWR) certified slurry walls. There are two installed slurry walls (12,075 ft total) which are being tested at this time and we assume they will pass certification standards within the next few months. and both are covered by the SWSP water; and We have included a factor of 20% for the 12,075 feet in those phases to cover remedial work on the completed liners until the DWR certification is received. Finally, there are 2 slurry wall (Sandstead & Northeast #1) that will be installed in the n ext 2 years. Both of the new slurry walls will be fully bonded as they are not installed yet. The slurry wall depths to bottom of the key t rench and as built lengths are shown in the Table L3. We have included a factor of 20% for the 12,075 feet in those phases to cover remedial work on the completed liners until the DWR certification is received. The total potential water surface area in Swingle South, is e stimated to be 37.3 acres at this time. Interior sloping is completed o n the Blue Ribbon, and approximately 500 of the Swingle South ✓ eservoir. The dewatering calculation for Swingle South is shown in Table L2, Blue Ribbon would not need dewatering as all slopes are done in that phase. Ft. Lupton West is a certified reservoir, so the slopes could be built using the cut/fill method as the below water slope are d ry at this time. We rounded the pumping time for Swingle South to the n ext day and used 72,300 gal/day as a transmissivity number to figure inflow from the aquifer. This figure is then used in the calculations for the bond amount. In this estimate we would have to complete bank backfilling on 3,040 linear feet at an average of 41.67 cyd/linear feet in Swingle South. The volume of concrete contained in the foundations of the scale and the processing plant is 125 yards. The conveyor is temporary and portable so only removal of 100 yards of concrete foundations for the g rade crossing over WCR 18 is included in the cost estimate. A 627C Cat motor scraper or similar equipment will be used to ✓ esoil the areas needing to be soiled and revegetated. A 140G Cat motor grader or similar equipment will be used to shape the seed bed, t he resoiled areas, grade the graveled surfaces and rip the Plant Site. A D8N Cat dozer or similar equipment will be used to reconstruct the slopes around the perimeter of the reservoirs. Cut/fill sloping is n eed in the Plant Site active mining area as mining has not reached the ✓ eservoir area sides, The tables below outline, the various areas of disturbance at t his time. As mining moves into the amendment area, the total d isturbance will begin to reduce as reclamation is completed in the 7 stages in the existing active mine area. L.G. Everist, Inc. M-1999-120 Ft. Lupton Sand and Gravel Revised -July, 2025 89 Declination MN MN8°01'E Name: FORT LUPTON Date: 06/17/25 Scale: 1 inch = 1,000 ft. LOCATED IN PARTS OF , SECTIONS 19, 30 & 31, T -2-N, R -66-W, AND PART OF SECTION 25 & 36, T -2-N, R -67-W, 6TH P.M., WELD COUNTY, COLORADO Copyright 2016, Trait* 4 a`ation ted L.G. EVERIST, INC. FT. LUPTON SAND AND GRAVEL MINE FIGURE L - SLURRY WALLS L.G. Everist, Inc. Ft. Lupton Sand and Gravel 90 M-1999-120 Revised - July 2025 RECLAMATION COSTS EXHIBIT L (CONT) TABLE Ll CALCULATION FACTORS Explanation Quantity Units Soil depth 8.00 Inches Lake South) bank sloping re -construction (Swingle 41.67 cy/Lft Lake (Northeast bank sloping #1) re -construction 74.05 cy/Ift Slurry wall installation cost $6.25 sq-ft Non certified Slurry wall bond factor 20°/0 Swingle South slope construction time 267 days Weed control costs $5,000.00 Per year TABLE L2 DEWATERING DATA (Swingle South only) Description Amount Units Area 100% of lake depth 28.65 acres maximum depth 33 feet length of %:1 slopes 3,400 feet Unit volume of water on %:1 slopes 156.25 cft/Lft length of 3:1 slopes 3,040 Ift Unit volume of water on 3:1 slopes 937.5 cft/Ift Gallon conversion factor 7.48 gal/cft Transmissivity # 72,300 gal/day Pump rate minimum 6,000 gpm CALCULATED VOLUMES AND TIMES Slope water volumes % :1 slope capacity 6,9963,880 gal 100°/0 depth 383,018,863 gal Total pumping volume 452,982,743 gal Pumping time Dewater lake 45.14 Days Slope construction time 13.06 Days Recharge sloping time factor and for inflow Dewatering during 0.49 Days TOTAL PUMPING TIME* 59.00 Days *NOTE: pumping time rounded to next full day L.G. Everist, Inc. M-1999-120 Ft. Lupton Sand and Gravel 91 Revised -July, 2025 RECLAMATION COSTS EXHIBIT L (CONT) TABLE L3 - CURRENT CONDITIONS (revised 6/2025) RECLAMATION ACTIVITY STAGE Parker Panowicz Swingle North Fort Lupton West Swingle South Blue Ribbon Sandstead Deep Lake Northeast #1 TOTALS GRAVEL SURFACE GRADE (ac) 9.49 6.86 12.48 7.96 8.98 45.78 REVEGETATE & GRADE (ac) 6.28 2.46 35.14 19.83 2.64 32.94 3.98 2.48 105.75 RESOIL VOLUMES @ 8 inches 6,754 2,646 37,795 21,328 2,839 35,430 4,281 2,667 113,740 % :1 SLOPE CUT/FILL SLOPING (yds) 39,440 126,67 31,391 197,508 Y2 :1 SLOPE BACKFILL SLOPING (yds) 74,050 74,050 Bank Armoring Oft) 1,030 1,030 DEWATER (hrs) 59.00 59.00 BACKFILLING SETTLING POND (yds) 72,146 72,146 SLURRY WALL LENGTH (Lft) certified certified certified 6,400' 5,675' 2,945 7,350 10,295 SLURRY WALL COLOR (Figure L) BLUE BLUE BLUE YELLOW YELLOW ORANGE ORANGE SLURRY WALL DEPTH (ft) 33.0 43.0 30.00 38.00 CONCRETE DEMOLITION (yds) 25 100 100 225 ROADS (ac) 5.97 1.35 1.77 1.54 1.54 2.11 0.70 14.98 ote slurry walls complete but not cent' led L.G. Everist, Inc. Ft. Lupton Sand and Gravel M-1999-120 Revised -July, 2025 RECLAMATION COSTS EXHIBIT L (CONT) ESTIMATED UNIT COSTS FOR RECLAMATION ITEMS: Unit Cost 1. Revegetation includes grass seed mix and labor to drill . . . . . . . . . . . 2. Re -spreading soil and/or growth media with 627-E Motor Scraper, Haul distance less than 900 . . 3. Rip seed bed in plant site, 140G motor grader . . 4. Grade and shape gravel surfaces, 140G motor grader 5. full service rental of fuel, maintenance and Pumping costs includes, self contained pump, servicing daily. 6. Cut/Fill 1 1 slope Less than 120 feet . 7. Backfill 1 1 slope Less than 120 feet . Backfill Sandstead 8. 9. 10. 11. 12. 13. 14. areas • . . areas D8N Dozer push distance • . . . . . . . . . D8N Dozer push distance • Settling Pond. Slurry wall construction Slurry wall repair bonding Bank Armoring Place Materials Concrete demolition & on -site disposal Conveyor crossing foundation demolition. Secondary Revegetation seeding only • . . $1,700.00/AC. . . . . . $1.929/YD . . . . $193.69 ac. • . . $193.69 ac • • . • • • . • . • . . . . . . . . . . . . . . • . . • . . . . . • • . . . . . . . . . . . . . . . . RECLAMATION COSTS 1. Revegetation, 105.75 ac @ $1,700.00/ac 2. Resoiling, 113,740 x 1.12 @ $1.929/yd3 3. Rip plant site & seed beds 105.45 ac @ $193.69/ac. 4. Grading gravel surface & Seedbeds 158.54 ac. @ $193.69/ac 5. Dewatering, 59 days @ $221.67/day 6. Cut/fill and compact side slopes, 197,508 yds @ $1.08/yd3 7 Backfill and compact side slopes, 74,500 yds @ $1.25/yd3 8. Backfill settling pond, 72,146 CYD @ $2 . 22/yd 3 9. Slurry installation fee. 367,650 sq-ft @ $6.25/ft 10. Slurry contingency fee. 455,225 sq-ft @ $1.25/ft 11. Bank Armoring 2,421 cyd @ $2.22/cy 12. Demolition & on -site disposal 225 yds@ $8.30/yd3. 13 Secondary revegetation 105.75 x 25% x $1,262.00/ac 14 Weed control costs Mobilization Liability insurance @ 2.020 Contingency @ 3.00% Profit @ 10% Engineering and Management Bond Processing Fee Reclamation Management @ 4.0% Engineering @ 5.230 Direct Cost Total Indirect Costs Total Indirect costs Total bond estimate Request Bond be set at $4,345,000.00 Equipment listed in this estimate is used for the calculations and actual reclamation activities at the mine. . $221.67/day** $1.08/YD3 . $1.25/YD3 . $2.22/YD3 . $6.25/sq-FT . $1.25/sq-FT . $2.70 /Yd . $8.30/Yd. . $8.30/yd $1,262.00/ac $179,775.00 $219,404.46 $20,482.72 $30,707.61 $13,078.53 $213,308.86 $92,562.50 $160,163.42 $2,187,687.50 $305,031.25 $6,535.35 $1,867.50 $33,364.13 $5,000.00 $3,468,968.82 $6,406.48 $70,073.17 $104,069.06 $346,896.88 $521,039.12 $500.00 $138,758.75 $181,427.07 $4,345,003.28 similar types may be used in * Estimate for services from Rain for Rent, Ft. Lupton, CO (970) 535-4963 the L.G. Everist, Inc. Ft. Lupton Sand and Gravel 93 M-1999-120 Revised -July, 2025 L.G. Everist, Inc - Ft. Lupton Sand and Gravel RECLAMATION COST ESTIMATE 07/22/2025 EXHIBIT L (CONT) Permit # M-1999-120 Table L-ln Task Parker / Pano Acres Length Average Depth (FT) CYD/FT Volume (Cyds or Sqft) Push/Haul Distance Unit Cost Total cost TOTAL AREA 43.51 TOTAL MINED 20.60 WATER AREA 20.45 Undisturbed (AC) 2.99 001 Revegetate (AC.) 6.28 $1,700.00 $10,676.00 002 Resoil (AC.) 6.28 0.67 6,754 900 $1.929 $13,029.41 003 Rip seed bed (AC.) 6.28 $193.69 $1,216.37 004 Grading and Shaping (AC.) includes and graveled resoiled areas 15.77 $193.69 $3,054.49 005 Dewatering (per day) 0.00 $221.67 $0.00 006 Cut Fill Sloping (CYD) complete $1.08 0 007 Backfill (Cuyds) sloping complete 500 $1.25 0 008 Slurry wall SQ-FT.) (LINEAR Certified 28 $6.25 0 010 Concrete Demo Plant (Cuyds) 25 $8.30 $207.50 011 Secondary seeding (AC.)@250 1.57 $1,262.00 $1,981.34 012 Annual Weed Control $500.00 013 Backfill Setteling Pond (Cyd) o.00 $2.22 $o.00 014 Reservoir armoring (Feet) 0 2,35 0 500 $2.70 $0.00 015 Underdrain Instalation (Feet) 0 $82.03 $0.00 Phase total project Table L -2n $30,665.11 Task Swingle North Acres Length Average Depth (FT) CYD/FT Volume (Cyds or Sqft) Push/Haul Distance Unit Cost Total cost TOTAL AREA 42.02 TOTAL MINED 31.88 WATER AREA 29.53 Undisturbed (AC) 3.33 001 Revegetate (AC.) 2.46 , . $11700.00 $4,182.00 002 Resoil (AC.) 2.46 , 0.67 2,646 . 900 $1.929 $5,103.88 003 Rip seed bed (AC.) 2.46 $193.69 $476.48 004 urauiny anu bnaping (AC.) includes resoiled A NIi r.MAf•r17 r..-1 A Mr,A A 13.14 $193.69 $2,545.09 006 Cut Fill Sloping (CYD) Complete $1.08 0.00 007 Backfill sloping {Cuyds} Complete 500 $1.25 0.00 008 Slurry wall (LINEAR SQ-FT.) Certified 38 $6.25 0.00 011 Secondary seeding (AC.)@25% 0.62 $1,262.00 $776.13 012 Annual Weed Control $500.00 Phase total project $13,583.57 L.G. Everist, Inc. Ft. Lupton Sand and Gravel L-1 M-1999-120 Revised - July 2025 L.G. Everist, Inc - Ft. Lupton Sand and Gravel RECLAMATION COST ESTIMATE 07/22/2025 EXHIBIT L (CONT) Permit # M-1999-120 Table L -3n Task Swingle South Acres Length Average Depth (FT) CYD/FT Volume (Cyds or Sqft) Push/Haul Distance Unit Cost Total cost TOTAL AREA 67.45 TOTAL MINED 52.31 WATER AREA 48.70 Undisturbed (AC) 4.85 001 Revegetate (AC.) 19.83 . . $1,700.00 $33,711.00 002 Resoil (AC.) 19.83 0.67 21,328 900 $1.929 $41,142.23 003 Rip seed bed (AC.) 19.83 $193.69 $3,840.87 004 Grading and Shaping (AC.) includes resoiled and graveled areas 32.31 $193.69 $6,258.12 005 Dewatering (per day) 59.00 $221.67 $13,078.53 006 Cut Fill Sloping (CYD) 3040 41.67 126,677 200 $1.08 $136,810.94 007 Backfill sloping (Cuyds) o $1.25 $0.00 008 Slurry wall SQ-FT.) (LINEAR complete 33 $6.25 $0.00 009 Slurry wall Contingency fee 20% (LINEAR SQ-FT.) 6,400 33 $1.25 $264,000.00 011 Secondary seeding (AC.)@250 . 4.96 $1,262.00 $6,256.37 012 Annual Weed Control $500.00 Phase total project Table L -4n $505,598.06 Task Ft Lupton Vest Acres Length Average Depth (FT) CYD/FT Volume (Cyds or Sqft) Push/Haul Distance Unit Cost Total cost TOTAL AREA 47.81 TOTAL MINED 41.25 WATER AREA 41.39 Undisturbed (AC) 0.29 001 Revegetate (AC.) 35.14 $1,700.00 $59,738.00 002 Resoil (AC.) 35.14 0.67 37,795 900 $1.929 $72,906.60 003 Rip seed bed (AC.) 35.14 $193.69 $6,806.27 004 Grading and Shaping (AC.) includes resoiled and graveled areas 38.61 $193.69 $7,478.37 006 Cut Fill Sloping (CYD) 3400 39,440 200 $1.08 $42,595.20 007 Backfill sloping (Cuyds) o 500 $1.25 0.00 008 Slurry wall (LINEAR SQ-FT.) Certified 33.00 $6.25 0.00 010 Concrete Demo Plant (Cuyds) 100 $8.30 $830.00 011 Secondary seeding (AC.)@25% 8.79 $1,262.00 $11,086.67 012 Annual Weed Control $500.00 Phase total project $201,941.11 L.G. Everist, Inc. Ft. Lupton Sand and Gravel L-2 M-1999-120 Revised - July 2025 L.G. Everist, Inc - Ft. Lupton Sand and Gravel RECLAMATION COST ESTIMATE 07/22/2025 EXHIBIT L (CONT) Permit # M-1999-120 Table L -5n Task Blue Ribbon Acres Length Average Depth (FT) CYD/FT Volume (Cyds or Sqft) Push/Haul Distance Unit Cost Total cost TOTAL AREA 55.55 TOTAL MINED 37.77 WATER AREA 37.04 Undisturbed (AC) 8.17 001 Reveget ate (AC.) 2.64 $1,700.00 $4,488.00 002 Resoil (AC.) 2.64 0.67 2,839 900 $1.929 $5,477.33 003 Rip seed bed (AC.) 2.64 $193.69 $511.34 Grading and Shaping 004 (AC.) includes resoiled 10.33 $193.69 $2,000.82 and graveled areas 006 Cut Fill Sloping (CYD) 0 $1.08 $0.00 , . 007 Backfill sloping (Cuyds) 0 500 $1.25 $0.00 008 Slurry wall SQ-FT.) (LINEAR complete p 43.00 $6.25 $0.00 Slurry wall 009 Contingency fee 20% 5,675 43.00 $1.25 $7,093.75 (LINEAR SQ-FT.) 010 Concrete Demo Plant 100 $8.30 $830.00 (Cuyds) . 011 Secondary seeding 0.66 $1,262.00 $832.92 (AC.)@250 012 Annual Weed Control $500.00 Phase total project Table L -6n $21,734.16 Task Sandst ead (Dodge) Acres Length Average Depth (FT) CYD/FT Volume (Cyds or Sqft) Push/Haul Distance Unit Cost Total cost TOTAL AREA 50.05 TOTAL MINED 36.64 WATER AREA _ 10.35 Undisturbed (AC) 4.65 001 Revegetate (AC.) 32.94 $1,700.00 $55,998.00 002 Resoil (AC.) 32.94 0.67 35,429 900 $1.929 $68,342.16 003 Rip seed bed (AC.) 32.94 $193.69 $6,380.15 004 Grading and Shaping (AC.) includes and graveled resoiled areas 32.94 $193.69 $6,380.15 005 Dewatering (per day) 0.00 $221.67 $0.00 008 Slurry wall (LINEAR SO -FT.) 2,945 30.00 $6.25 $552,187.50 011 Secondary seeding (AC.)@25% 8.24 $1,262.00 $10,392.57 ' 012 Annual Weed Control $500.00 013 Backfill Setteling Pond (Cyd) 72,146 $2.22 $160,163.42 Phase total project $860,343.94 L.G. Everist, Inc. Ft. Lupton Sand and Gravel L-3 M-1999-120 Revised - July 2025 L.G. Everist, Inc - Ft. Lupton Sand and Gravel RECLAMATION COST ESTIMATE 07/22/2025 EXHIBIT L (CONT) Permit # M-1999-120 Table L -7n Task Deep Lake Acres Length Average Depth (FT) CYD/FT Volume (Cyds or Sqft) Push/Haul Distance Unit Cost Total cost TOTAL AREA 7.90 TOTAL MINED 5.75 WATER AREA 3.62 Undisturbed (AC) 0.30 001 Revegetate (AC.) 3.98 $1,700.00 $6,766.00 002 Resoil (AC.) 3.98 0.67 4,281 900 $1.929 $8,257.49 003 Rip seed bed (AC.) 3.98 $193.69 $770.89 004 Grading and Shaping (AC.) includes resoiled and graveled areas 3.98 $193.69 $770.89 005 Dewatering (per day) 0.00 $221.67 $0.00 011 Secondary Seeding (AC.)@25O 1.00 . $1,262.00 $1,255.69 012 Annual Weed Control $500.00 Phase total project Table L -8n $18,320.95 Task Northeast # 1 Acres Length Average Depth (FT) CYD/FT Volume (Cyds or Sqft) Push/Haul Distance Unit Cost Total cost TOTAL AREA 70.87 TOTAL MINED 56.82 WATER AREA 53.68 Undisturbed (AC) 6.25 . 001 Revegetate (AC.) 2.48 $1,700.00 $4,216.00 002 Resoil (AC.) 2.48 0.67 2,667 900 $1.929 $5,145.37 003 Rip seed bed (AC.) 2.48 $193.69 $480.35 004 Grading and Shaping (AC.) includes resoiled and graveled areas 11.46 $193.69 $2,219.69 005 Dewatering (per day) 0.00 $221.67 $0.00 006 Cut Fill Sloping CYD) 1,695 18.52 31,391 $1.08 $33,902.71 007 Backf ill sloping (Cuyds) 1,000 74.05 74,050 $1.25 $92,562.50 008 Slurry wall ( LINEAR SQ-FT.) , 7, 350 38.00 $6.25 $1,745,625.00 011 Secondary (AC.)@25O seeding 0.62 $1,262.00 $782.44 012 Annual Weed Control $500.00 014 Reservoir armoring ( per foot) 1,030 2.35 2,421 $2.70 $6,535.35 ' Phase total project $1,891,969.41 L.G. Everist, Inc. Ft. Lupton Sand and Gravel L-4 M-1999-120 Revised - July 2025 L.G. Everist, Inc - Ft. Lupton Sand and Gravel RECLAMATION COST ESTIMATE 07/22/2025 EXHIBIT L (CONT) Permit # M-1999-120 Table L -9n Task Northeast # 2 Acres Length Average Depth (FT) CYD/FT Volume (Cyds or Sqft) Push/Haul Distance Unit Cost Total cost TOTAL AREA 67.00 TOTAL MINED 56.47 WATER AREA 49.45 Undisturbed (AC) 4.11 001 Revegetate (AC.) 7.02 $1,700.00 $11,934.00 002 Resoil (AC.) 7.02 0.67 7,550 900 $1.929 $14,564.72 003 Rip seed bed (AC.) 7.02 $193.69 $1,359.70 004 Grading and Shaping (AC.) includes resoiled and graveled areas 13.44 $193.69 $2,603.19 006 Cut Fill Sloping (CYD) 1,398 7.82 , 10,932 , $1.08 $11,806.95 007 Backfill sloping (Cuyds) 1,000 31.3 3,130 500 $1.25 $3,912.50 008 Slurry wall (LINEAR SQ-FT.) 6,880 38.00 $6.25 $1,634,000.00 012 Annual Weed Control $500.00 Phase total project Table L -10n $1,680,681.07 Task Northeast # 3 Acres Length Average Depth (FT) CYD/FT Volume (Cyds or Sqft) Push/Haul Distance Unit Cost Total cost TOTAL AREA 12.12 TOTAL MINED 4.52 WATER AREA 4.22 Undisturbed (AC) 4.33 001 Revegetate (AC.) 0.99 $1,700.00 $1,683.00 002 Resoil (AC.) 0.99 0.67 1,065 900 $1.929 $2,054.00 003 Rip seed bed (AC.) 0.99 $193.69 $191.75 004 Grading and Shaping (AC.) includes resoiled and graveled areas 2.58 $193.69 $499.72 006 Cut Fill Sloping (CYD) 730 31.3 22,849 $1.08 $24,676.92 008 Slurry wall (LINEAR SQ-FT.) 2,925 35.00 $6.25 $639,843.75 ' 012 Annual Weed Control , $500.00 014 Reservoir armoring ( per foot) 970 2.35 2,280 500 $2.70 $6,154.65 Phase total project Table L -11n $675,916.14 Task Northwest Acres Length Average Depth (FT) CYD/FT Volume (Cyds or Sqft) Push/Haul Distance Unit Cost Total cost TOTAL AREA 52.33 TOTAL MINED 27.47 WATER AREA 22.44 Undisturbed (AC) 18.76 , 001 Revegetate (AC.) 5.03 $1,700.00 $8,551.00 002 Resoil (AC.) 5.03 0.67 5,410 900 $1.929 $6,957.32 003 Rip seed bed (AC.) 5.03 $193.69 $974.26 004 Grading and Shaping (AC.) includes and graveled resoiled areas 11.13 $193.69 $2,155.77 006 Cut Fill Sloping (CYD) 695 12.86 8,938 $1.08 $9,652.72 007 Backfill sloping (Curds) 500 500 70.42 44.95 57,455 500 $1.25 $71,818.75 008 Slurry wall SQ-FT.) (LINEAR 6,220 35.00 $6.25 $1,360,625.00 012 Annual Weed Control $500.00 L-5 Phase total project $1,462,821.78 Groundwater Quality Monitoring Plan Fort Lupton Sand and Gravel Mine LGE - Fort Lupton 12546 Weld County Road 18 Fort Lupton, CO June 9, 2025 Prepared for: L.G. Everist, Inc. 7321E 88t' Avenue, Suite 200 Henderson, CO 80640 Prepared by: Molen & Associates, LLC P.O. Box 142 Lafayette, CO 80026 TABLE OF CONTENTS 1.0 INTRODUCTION 2 2.0 MONITORING PLAN COMPONENTS 3 2.1 Groundwater Flow Direction 3 2.2 Existing Groundwater Wells 3 2.3 Water Quality Monitoring Wells 4 3.0 Groundwater Monitoring 5 3.1 Water Level Monitoring 5 3.2 Water Quality Monitoring 5 4.0 WATER QUALITY EVALUATION 7 4.1 Baseline Data Collection 7 4.2 Sampling Parameters 7 4.2.1 Selection of Parameters 8 4.3 Statistical Analysis 8 5.0 VERIFICATION RE -SAMPLING 9 6.0 REPORTING 9 List of Tables Table 1: Existing Water Level Wells Table 2: Existing Water Quality Well Locations and Elevations Table 3: Sampling Parameter List List of Figures Figure 1: Monitoring Wells Appendices Appendix A — Sampling Parameter List Appendix B — Groundwater Sampling Plan Groundwater Quality Monitoring Plan 1.0 INTRODUCTION LG Everist, Inc is planning to mine aggregate resources from northern portions of the Fort Lupton mine site, Permit M-1999-120. An amended mining permit for the Fort Lupton mine site incorporates the northern portions into the mining site. The amendment area is approximately 202.25 acres and is located northeast and northwest of the current Fort Lupton mine site. The purpose of this Groundwater Quality Monitoring Plan (GWMP) is to provide a description and assessment of the potential of the introduction of pollutants into the groundwater during mining activities, and to assess if and how water quality may change over time. The plan also provides information about the collection of water level measurements to show water level changes over time. Sample collection is described in a separate Groundwater Sampling Plan (GSP). The groundwater sampling procedures, sample handling, and laboratory methods are presented in the GSP. This GWMP will designate what data is collected and how it may be interpreted and modified as the mining activities progress. Both the GWMP and the Groundwater Sampling Plan (GSP) will be followed for all groundwater monitoring done at the LG Everist — Fort Lupton North (LGE-FLN) site. The Colorado Division of Reclamation, Mining and Safety (DRMS) requires a GWMP for the LG Everist — Fort Lupton (LGE-FL) mining permit to establish baseline constituent concentrations for comparison to future sample results to assess whether mining activities are impacting groundwater quality. Water quality monitoring wells (WQM), approved by DRMS, will be sampled for five quarters to establish a baseline set of data. Future samples may be collected from the water quality monitoring wells (WQM) and compared to the baseline data during mining activities. Vii I'�1aE I'i LG Everist Fort Lupton GW Monitoring Plan Page 2 of 9 Groundwater Quality Monitoring Plan 2.0 MONITORING PLAN COMPONENTS The network of groundwater monitoring wells is shown in Figure 1 — Monitoring Wells. The entire well monitoring network includes the water quality monitoring wells and the other water gauging wells. All of the wells are completed in the uppermost aquifer and located in up -gradient and down -gradient positions in the alluvium. Additional monitoring wells may be included in the future as necessary, or in response to regulatory concerns. Baseline sample data is collected from the WQM wells. The baseline sample data from each of the WQM will be compared to future sample results. The comparison of the baseline data and additional WQM sample results is used to assess potential changes in water chemistry that may cause overall changes in water quality downstream. 2.1 Groundwater Flow Direction The groundwater flow direction generally follows the topographic gradient. Groundwater generally flows from south to north, in the general flow direction of the South Platte River alluvium. 2.2 Existing Groundwater Wells Existing groundwater wells have been used to measure water levels over the past several years. The groundwater well locations are presented in the L.G. Everist, Inc. Fort Lupton Sand and Gravel - Figure 1 Monitoring Wells, The majority of the monitoring wells are water gauging, used for water level measurements, and are also shown in Figure 1. Water quality groundwater monitoring wells are generally located at the perimeters of the site and in areas that will not be mined in the near future. The water quality monitoring wells (WQMs) are the only wells used to obtain baseline groundwater quality data for the LGE-FL site. Groundwater wells are completed with a 2 -inch diameter PVC casing and screen. The wells are constructed with screening across the entire water bearing zone, and solid piping to the surface completion. A washed sand pack is placed from the base of the well to one -foot above the screened interval. A lockable metal well cover surrounds the PVC well casing and is imbedded in a concrete pad installed at the ground surface. Vii I'�1aE I'i LG Everist Fort Lupton GW Monitoring Plan Page 3of9 Groundwater Quality Monitoring Plan Table 1: Existing Water Level Wells GRADIENT Type WELL NAME MW 6 MIDDLE Water Level MW 8 MIDDLE Water Level MW 9 MIDDLE Water Level MW 11 MIDDLE Water Level MW 14 MIDDLE Water Level MW 20 MIDDLE Water Level MW 24 MIDDLE Water Level MW 25 MIDDLE Water Level MW 26 MIDDLE Water Level MW 27 MIDDLE Water Level MW 28 MIDDLE Water Level MW 29 MIDDLE Water Level MW 30 MIDDLE Water Level MW 31 MIDDLE Water Level MW 32 MIDDLE Water Level MW 34 MIDDLE Water Level MW 37 MIDDLE Water Level MW 45A MIDDLE Water Level MW 52 MIDDLE Water Level MW 54 MIDDLE Water Level MW 55 MIDDLE Water Level MW 57 MIDDLE Water Level MW 58 MIDDLE Water Level MW 61 MIDDLE Water Level 2.3 Water Quality Monitoring Wells Four groundwater monitoring wells are used for water quality sampling. The groundwater monitoring wells, MW -02n, MW -03n, and MW -04n are installed as downgradient water quality sampling points. The downgradient water monitoring well MW -01n is both a water quality well and a point of compliance (POC) well. Table 2: Existing Water Quality Well Locations and Elevations MONITOR WELL (WQM/POC) MW -01n MW -02n MW (WQM) -03n MW (WQM) -04n (WQM) NO./NAME NORTHING, FT 1289834.266 1289818.983 1288524.49 1286086.145 3190113.783 3187409.454 318477$.435 3185152.696 FASTING, FT 4861.275 4860.73 48$4.104 4$69.923 ELEVATION (TOG), FT Original Coord System 3.42 2.83 3.25 3.58 CASING HEIGHT, FT I'�1 � LE I'� A & r�ssaci,�rEs LG Everist Fort Lupton GW Monitoring Plan Page 4 of 9 Groundwater Quality Monitoring Plan 3.0 Groundwater Monitoring Water level gauging, measurements to the water level across the mining area, have been done since mining began. The water level measurements will continue to be made during the mining activities at the mine site and into the future as required by the mining permit. Water quality monitoring begins at the new portions of the mine site are added to the mining permit through the amendment process. Water quality monitoring is a DRMS requirement that will be completed. 3.1 Water Level Monitoring Water level measurements have been made throughout the mining operations. Water level measurements are made in monitoring wells monthly. Water level measurements collected in concert with water quality sampling can serve as quarterly water level measurements for the purposes of this monitoring evaluation plan. Existing groundwater wells, listed in Table 1, have been used for gauging water levels and have been measured over time. Water level measurements are made with a water level indicator. The water level indicator signals at the top of the water in the well and is measured with the tape at the top of the PVC well casing. The measured water level is subtracted from the surveyed well elevation to determine the groundwater elevation. Water wells used for water level gauging are not used for groundwater quality sampling. However, groundwater quality wells may be used for water level gauging. 3.2 Water Quality Monitoring Water quality monitoring wells are sampled on a quarterly basis for at least five consecutive quarters, Water quality samples are collected from the WQM wells listed in Table 2, in accordance with the Groundwater Sampling Plan. Water quality samples are analyzed for the parameters listed in Table 3. Approved baseline water quality parameters are included in the water quality data collection. Once baseline water quality data is obtained, all or only select number of water quality monitoring wells and parameters will be utilized for the collection of water quality data in the future. This GWMP includes parameters from the Colorado Department of Public Health and Environment (CDPHE) Reg 41 — Basic Standards for Groundwater Tables 1 through Table 4. The water quality sampling parameters are listed in Table 3 in Appendix I. LG Everist commits to obtain water quality samples on a quarterly basis for five quarters prior to exposing water during mining. The water quality data will be used as a baseline, while subsequent water quality data will be compared to the baseline data to assess water quality variations. Parameters with significant non -detects or are determined to be I'�1�,� & tia LETIN LG Everist Fort Lupton GW Monitoring Plan Page 5of9 Groundwater Quality Monitoring Plan unrelated to mining and/or mining activities may be petitioned to be omitted during the water quality assessment will be detailed in a baseline report. The report will include the baseline data, assessment analysis, and justification for any proposed modifications to the water monitoring plan based on the data. The operator will submit the baseline report to the DRMS as a Technical Revision. The operator understands that any modifications to the water monitoring plan (including well locations and parameters to be tested, and sampling frequency) must be through the DRMS Technical Revision process and only with DRMS approval. I'�1 o LE I`� Vii & rissocigi LG Everist Fort Lupton GW Monitoring Plan Page 6of9 Groundwater Quality Monitoring Plan 4.0 WATER QUALITY EVALUATION The proposed water quality evaluation is based on statistical analysis, where the baseline data is compared to future samples. The date will be analyzed statistically to evaluate expected natural water quality variations within the aquifer. The statistical analysis is necessary to provide a means to evaluate the expected range of values in the representative baseline data, so that when future samples are obtained, variations outside the statistical norms can then be evaluated regarding the potential of water quality degradation from mining activities. 4.1 Baseline Data Collection To initially evaluate the baseline data, a normal distribution and a 95 percent confidence interval around the mean will be used to establish a baseline range of values. This is standard statistical analysis commonly used for data management to establish an anticipated range of naturally occurring values that may occur in the aquifer. Water quality changes within the baseline data could be related to (a) seasonal variations, (b) changes in precipitation recharge, (c) spatial variations within an aquifer due to heterogeneous geologic conditions and/or (d) changes in water levels and hydraulic gradients with time that could affect water flow in the aquifer. Therefore, there may be a need to update the baseline data over time because the data has changed due to a particular change in natural conditions at the mining site. It may be impractical to conduct extensive statistical analysis on every water quality parameter tested. A set of select water quality parameters can be used to identify potential water quality degradation. This set of select parameters will be used for statistical analyses and charting and will be approved by DRMS in a TR. After the initial five quarters of baseline data is collected, future sampling will occur twice per year (during periods of high flow and low flow and set 5-7 months apart) for the specific parameters. Prior to starting the mining, sampling will be conducted within 90 days. The water quality sample results from future sampling events during the mining activities will be compared to the baseline data. A further in-depth review of the groundwater quality data will be needed to determine whether mining is resulting in the potential for any type of pollution in the aquifer. 4.2 Sampling Parameters The sampling parameters listed in Table 3 are derived from CDPHE — Reg 41 Basic Standards for Groundwater, Tables 1 through Table 4. These parameters are analyzed for all baseline samples. The baseline sample data will be used to determine potential future changes in groundwater quality. Vii I'�1aE I'i LG Everist Fort Lupton GW Monitoring Plan Page 7of9 Groundwater Quality Monitoring Plan 4.2.1 Selection of Parameters The groundwater data obtained from baseline sampling will provide information that can be used to determine the appropriate parameters for statistical analysis, and which parameters should be excluded in future sampling events. The proposed set of parameters will be determined after the baseline data is obtained. The set of parameters will be evaluated on an annual basis and if any anomalous trends develop for parameters, subsequent statistical analysis will be conducted to assess anomalous trends outside the expected naturally occurring water quality variability. 4.3 Statistical Analysis The database of sample analytical results will be preliminarily assessed for representativeness. Any anomalous, or non -representative, water quality data will be excluded from the baseline data prior to conducting the statistical analysis. If data points are excluded, LGE will provide a written rationale to the Division for the exclusion. Once the representative database has been established, the baseline mean and standard deviation for each of the selected parameters will be calculated. The data collected will provide the standard deviation used to establish a control limit (95 % confidence interval around the mean), beyond which any changes in water chemistry for that parameter will be assessed to evaluate if conditions in the mining area may be affecting ground water quality. It is proposed that "control charts" be constructed for each of the selected parameters in each of the water systems so that annual water quality data can be tracked to evaluate any potential trends in water quality. For all of the parameters there will be an upper control limit beyond which a significant change in ambient water quality can be assumed. It is also proposed that the stream standard for each of the selected parameters be shown on the control chart, as, for some parameters, stream standards may have already been exceeded in the background water quality, while, for other parameters, stream standards are above the expected range of natural variations in water chemistry. The control charts and statistical analysis are prepared on an annual basis as additional water quality data become available from additional sampling events. Vii I'�1aE I'i LG Everist Fort Lupton GW Monitoring Plan Page 8of9 Groundwater Quality Monitoring Plan 5.0 VERIFICATION RE -SAMPLING Under certain circumstances a verification re -sampling may be collected, and samples submitted for analysis using the Groundwater Sampling Plan. The samples will be collected within four weeks of the analytical report date. A verification sample may be collected for the following sampling event depending on the frequency of sampling. Verification re -samples are designed to provide confirmation of the sample analytical data for sample result anomalies or statistical analysis. 6.0 REPORTING A report will be submitted to DRMS within 60 days after the fifth groundwater quality sample is collected. The report will include a summary of the data collected, statistical data, and a description of the assessment of data. Control charts are the preferred statistical method for presenting the data. The control charts will be done on all the data to date. Future sampling reports will be provided to DRMS on an annual basis or at another approved frequency. If confirmed exceedances of the statistical methods (control charts) are noted after regular annual sampling, a specific response plan will be prepared by LGE to address that issue. The specific response plan will include an evaluation of the number of selected parameters that show exceedances, the potential variability in the level of exceedances, and the duration of these exceedances. Vii I'�1aE I'i LG Everist Fort Lupton GW Monitoring Plan Page 9of9 Figures Figure 1 - Monitoring Wells ` t � �v� v • vv \ r � �l � I 5 ' �a MW 57 {WL}� . o MW -04n (WQM)\ MW 58 (WL) sipt..,863� NlyyO0/8 r - � =� MW 11 (WL} MW 25 (WL l \.MW 45A (WL) MW 55 WL O s• MW 24 (WL) MW 54 (WL) MW -52 (VVL) MW 14 ONL) ' • 14 : 74* O nµ � • yr' MW06 L.G. Everist, Inc. FORT LUPTON SAND AID GRAVEL EXHIBIT G2s - MONITORING WELLS :briar‘f - C S o r i rIlAW 37 (WL) 4 v MW 34 (WL) • O i MW 29 (WL) J `7 <- MATCH LINE _ !, MATCH, LINES s t�� .MW 30 (WL) c MW 28(WL) ; � ♦ MW 27 (WL)48.3 8/ WELL KEY NOTES ♦ Site Monitoring Well ■ WQ M Well 1. Data from existing monitoring water level wells is provided with annual reports. 2. Existing MW locations shown on the map are confirmed via ground check. 3. WQM well locations shown on map are confirmed via ground check. 4 TI • MW 32 (WL) i O I 0 r 4 it EXISTING PERMIT AREA JUN 05, 2025 - 11: 21: 43 Appendix A Sampling Parameter List Groundwater Quality Monitoring Plan Table 3: Sampling Parameter List Analyte Table (mg/L unless Value other Standard units given) Reg. Reference 41 Table (1-4) pH Field (pH unit) 6.50 - 8.50 2 and 3 Coliforms (30 day average) 2.2 org/100 ml 1 Total Corrosivity noncorrosive 2 Phenol 0.3 2 400 mg/L or 1.25X background 4 TDS 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 Chloride - Dissolved 250 2 Chromium - Dissolved 0.1 1 and 3 Cobalt - Dissolved 0.05 3 Copper - Dissolved 0.2 3 Fluoride - Dissolved 2 3 Iron - Dissolved 0.3 2 Lead - Dissolved 0.05 1 Manganese - Dissolved 0.05 2 Mercury - Dissolved 0.002 1 Molybdenum - Dissolved 0.21 1 Nickel - Dissolved 0.1 1 Nitrate (NO3) 10 1 Nitrite (NO2) 1 1 Nitrite + Nitrate as Nitrogen 10 1 Selenium - Dissolved 0.02 3 Silver - Dissolved 0.05 1 Sulfate - Dissolved 250 2 - Dissolved 0.002 1 Thallium Uranium - Dissolved 0.0168 to 0.03 1 Vanadium - Dissolved 0.1 3 Zinc - Dissolved 2 3 LG Everist Monitoring Plan Appendix B Groundwater Sampling Plan Groundwater Sampling Plan LGE - Fort Lupton 10482 County Road 32.5 Platteville, CO May 17, 2023 Prepared for: L.G. Everist, Inc. 7321E 88t'' Avenue, Suite 200 Henderson, CO 80640 Prepared by: Molen & Associates, LLC P.O. Box 142 Lafayette, CO 80026 TABLE OF CONTENTS 1.0 PURPOSE 2 2.0 APPLICABILITY 2 3.0 RESPONSIBILITIES 2 3.1 Sampling Personnel 2 3.2 Task Manager 2 3.3 Project Manager 2 4.0 GROUNDWATER SAMPLING PROCEDURES 2 4.1 Preparation for Sampling 2 4.2 Field Work Prior to Sampling 3 4.3 Sample Collection 4 4.3.1 Decontamination 4 4.3.2 Sampling Equipment and Materials 4 4.3.3 Purging 5 4.3.4 Withdrawal of Sample 6 4.4 Sample Preservation, Handling, and Shipment 7 4.5 Chain -of -Custody of Samples 8 4.6 Quality Assurance and Quality Control 8 5.0 Analytical Procedures 9 6.0 Analytical Data Review 9 7.0 Verification Re -sampling 10 Appendices Appendix A — Sampling Field Data Sheet Appendix B — Groundwater Quality Sampling Plan 1.0 PURPOSE This technical procedure for groundwater sampling establishes a standard methodology for collecting groundwater samples for laboratory analysis which are representative of aquifer water quality. 2.0 APPLICABILITY This technical procedure is applicable to field personnel engaged in the collection of groundwater samples from wells for the purposes of laboratory analysis. This document should be read in conjunction with all regulatory, work plan, orders, client -specific requirements, and other project -specific guidelines. 3.0 RESPONSIBILITIES 3.1 Sampling Personnel Sampling Personnel are responsible for sample collection, sample custody in the field, sample preservation, total and accurate completion of field and data sheets, field parameter measurements, sample delivery, and data delivery to the Project Manager, as described in this technical procedure. 3.2 Task Manager The Task Manager is responsible for supervising Sampling Personnel. Supervision includes ensuring that samples are collected, documented, preserved, field analyzed, handled and shipped or delivered to the appropriate laboratory as specified in project work documents and this technical procedure. 3.3 Project Manager The Project Manager is responsible for overall management of the project, sampling program design and implementation and providing any required clarifications in the use of this procedure. In most cases, the Project Manager will also fill the role of Task Manager. 4.0 GROUNDWATER SAMPLING PROCEDURES 4.1 Preparation for Sampling Following the determination of a sampling event date, sample bottles will be ordered from the contracted analytical laboratory. Sampling personnel will coordinate with the Pli1 MSoIEEN LG Everist Sampling Plan Page 2 of 10 Groundwater Quality Sampling Plan contracted lab so that sample bottles can be ordered in sufficient time for shipping, bottle inspection, and corrections. If any changes have been made to the site analyte list, the laboratory should be informed prior to bottle shipment. Sufficient sample bottles for each parameter group (total metals, anions, etc.) for each well will be verified upon receipt. Additional bottles for Quality Assurance/Quality Control (QAQC) samples (duplicates, trip blanks, field blanks, and/or equipment blanks) will also be arranged, as necessary, with the laboratory prior to shipment. The laboratory will also provide sample labels, chain -of -custody (COC) forms, and COC seals with delivery of the sample bottles. 4.2 Field Work Prior to Sampling Sampling personnel will inspect each well prior to sampling. The condition of the well casing, concrete pad, reference mark for water level measurements, protective steel casing, well identification markings, and security lock will be recorded. Additionally, the following will be recorded on a sampling data sheet (Appendix I) for each monitor well: • Observations made during visual inspection. • Static water level of well measured with electronic signal on measuring tape. • Total depth of the well measured or recorded from previous events. • Date and time of well measurements and well sampling • Purge water volumes calculated or rate of purging, if needed. • Observation of sample odor, presence of immiscible layers, and relative turbidity Prior to purging and groundwater sampling of any well, the static water level will be measured in the monitor well. The water levels for all the groundwater monitoring n etwork wells will be measured on the same day or within a 36 -hour period of time. In addition to the water levels, total depth will be measured annually in all wells in the monitoring network. Water level and total depth measurements will be made to the n earest 0.01 foot from a dedicated reference mark on the riser pipe using a portable electric water level indicator and will be re -measured for consistency. Depths to water will be compared in the field to previous measurements to minimize the possibility of recording incorrect readings. To avoid potential cross -contamination, the water level probe and tape will be washed before the initial use and between well locations using an AlconoxTm/water solution followed by a rinse with distilled water, or use of a disposable alcohol water swab. A pair of new disposable gloves (nitrite or latex) will be worn while performing groundwater level measurements. If the total depth measurement indicates that 25% or more of the effective screen length of a well has become filled in with sediment, the well will be re -developed. Re- �� MSDIEE N LG Everist Sampling Plan Page 3 of 10 Groundwater Quality Sampling Plan development will consist of purging a minimum of five casing volumes from the well, or purging the well dry twice if the yield is insufficient for continuous purging. In wells with sufficient yield, purging will continue until the sediment is removed and field parameters (pH, temperature, and conductivity) stabilize. Parameters are considered stabilized when there is less than a ±10 percent change in three consecutive measurements of temperature and conductivity, and pH readings are within ±0.2 standard units. For wells that purge dry, field parameters will be measured at the start and end of both purging cycles, if possible. The volume of water standing in each well will be calculated using the static water level measurement, the total depth of the well, and the casing diameter. One casing volume will be considered the water present in the well casing. Well depths for the purpose of well volume determination will be obtained from well completion records. The equation for calculation of one casing volume is: V = [TT X (r casing)2 X h] X 7.48 V=0.16xhfor a2 inch well where: V= r casing h= volume of water in well casing [gallons] radius of well casing [feet] height of water column (total well depth - depth to water) [feet] 4.3 Sample Collection 4.3.1 Decontamination All re -useable, non -dedicated sampling equipment will be decontaminated between each well location to provide representative samples. Decontamination will be performed by washing all equipment with an AlconoxT"'/water solution followed by a rinse with distilled water. Water generated from decontamination procedures will be disposed of at least 20 feet from the well site. All clean or unused sampling equipment will be handled by personnel wearing new disposable gloves (e.g., nitrite or latex). After the re -useable sampling equipment has been decontaminated it will be wrapped in new clean plastic sheeting or placed in new clean plastic bags. The sampling equipment will remain in plastic sheeting or bags until it is used again at the next sampling event. 4.3.2 Sampling Equipment and Materials Purging and sampling equipment will consist of bailers and/or pumps. The bailers may be disposable or dedicated, and the pumps either dedicated or re -useable, to be decontaminated prior to each sample location, or dedicated. This ri0 MSOIEE N LG Everist Sampling Plan Page 4 of 10 Groundwater Quality Sampling Plan equipment will be constructed of materials that will not alter the quality of the groundwater samples. Other sampling equipment may include the following: • Water level indicator; • Combination water quality meter for measuring pH, temperature, and conductivity; • Water quality meter calibration solutions; • Disposable gloves (nitrite, latex, or other appropriate material); • Distilled or deionized water; • Phosphate -free environmental detergent such as AlconoxTM, • Spray bottles for decontamination solution wash and rinse; • Peristaltic pump with associated tubing; • Battery or power for peristaltic pump; • 0.45 -micron filter(s) if field -filtering is necessary; • Plastic sheeting to prevent possible contamination of sampling equipment; • ZiplocTM freezer bags for sample storage and shipping; • Paper towels; • 5 -gallon plastic buckets for decontamination and purge volume measurement; • Sample bottles and sample preservatives; • Field forms including groundwater sampling data sheets, COC forms, and sample labels; • Coolers and ice. All of the groundwater purging and sampling equipment will be maintained in a clean and working condition. Sampling personnel will wear new disposable gloves while handling the sampling equipment that will be in contact with water samples. 4.3.3 Purging Prior to sample collection, each well will be purged of stagnant water using disposable or dedicated sampling equipment such as bailers and rope. Bailing will be performed at a rate that will minimize agitation of recovery waters and will continue until a minimum of three casing volumes have been purged and field parameters (pH, temperature, and conductivity) have stabilized, or the well is bailed dry. Field parameters will be measured at a frequency no greater than once per casing volume and purging will continue until there is less than ±10 percent change in three consecutive measurements of temperature and conductivity, and pH readings are within ±0.2 standard units. If a well is bailed dry before removing three casing volumes, sample collection will begin when a sufficient amount of groundwater has entered the well. In this situation, field parameters will be measured at the start of sample collection and again after sample collection is ri4,4 MSOLEN LG Everist Sampling Plan Page 5 of 10 Groundwater Quality Sampling Plan complete, if possible. The collection of these groundwater samples must be within 24 hours of purging. All field parameter measurements will be recorded on a field data sheet along with a description of the sample appearance at the time of field parameter measurement. The water quality meter used to measure field parameters will be calibrated according to manufacturer's recommendations prior to purging. Purge water generated during sampling events will be discharged on the ground, at least 20 feet from the well site, unless previous analyses have indicated that groundwater contamination has occurred at that well location. If previous analytical results indicate that groundwater contamination has occurred, purge water may need to be containerized and disposed of in accordance with state and federal regulations. 4.3.4 Withdrawal of Sample After purging is completed, sampling personnel will re -glove with new disposable gloves in preparation for sample collection. Sample containers will be filled based on parameter sensitivity to volatilization and pH change as follows: • Other organics (SOCs) • Dissolved Metals • Anions/Cations • Other inorganics and miscellaneous analytes Monitor wells will be sampled for analysis of the Regulation No. 41- The Basic Standards for Ground Water 5 CCR 1002-41, Colorado Department of Public Health and Environment Water Quality Control Division. Tables with parameters from the Reg 41 Standards are provided in Attachment 2. Portions of the list will be determined for specific sampling events and is limited to parameters listed in Table 1 through Table 4. Some low yield wells may produce insufficient volume to fill all of the sample containers within 24 hours of purging. Sample containers for these wells will be filled in the order listed above until the sample volume is depleted. Filled bottles will be submitted to the laboratory for limited analysis. VOC samples will be collected in 40 milliliter glass vials, SVOC and PAH samples will be collected in glass sample containers appropriate to the laboratory's analytical capability. Metals and other inorganic samples will be collected in plastic or glass containers of appropriate capacity. New sample containers with appropriate preservatives will be provided by the analytical laboratory. IF MOLENS LG Everist Sampling Plan Page 6 of 10 Groundwater Quality Sampling Plan Every effort will be made to reduce contact between the bottles and sampling equipment. As an added precaution, contact time of the sample with ambient air will be minimized by replacing caps immediately after the bottles are filled. If VOC samples are collected, it will be done without air bubbles. This will be achieved by adding sample slowly until a convex meniscus form at the top of the vial (i.e., the vial is slightly overfilled) before replacing the cap. Once the cap is firmly attached, the vial will be inverted and examined for air bubbles. Metal samples will be field filtered when possible, utilizing a peristaltic pump and 0.45 -micron filters. Sometimes field filtering will not be possible, and samples will be submitted for laboratory for filtering prior to analysis. Following completion of groundwater sampling at each monitor well, all re- usable, non -dedicated sample equipment will be decontaminated in accordance with the procedures specified above in Section 4.2.1. 4.4 Sample Preservation, Handling, and Shipment Groundwater samples will be preserved as follows: • VOCs (if sampled) — hydrochloric acid (HCI) or no preservative • Dissolved Metals - none • Anions/Cations - none • Other organics and inorganics — none Preservatives will either be included with the sample containers in small vials or will be pre -added to the sample containers by the laboratory. If the preservatives need to be added to the sample containers, sampling personnel will place the specified volume of preservative to the container during the sampling. Sample filtration may need to be performed in the field or in the analytical laboratory. After sample collection, filled and capped containers will be wiped clean, appropriately labeled, and stored with ice or frozen icepacks in insulated coolers. Sufficient ice or icepacks will be added to the coolers to maintain sample temperatures at or below 4°C. Packing material will be added to the coolers as necessary to prevent breakage of glass containers when they are shipped. At the end of each day of sampling, collected samples will be delivered or shipped to the analytical laboratory. A completed and signed COC form will accompany all samples contained within the cooler. The COC will be kept preventing moisture damage and may need to be sealed inside a gallon -size ZiplocTM bag and placed in the cooler for shipment. If the sample cooler is shipped for overnight delivery, the cooler will be sealed VA71 MSOLEN LG Everist Sampling Plan Page 7 of 10 Groundwater Quality Sampling Plan with shipping tape and a signed COC seal, provided by the laboratory, will be affixed to the outside of the cooler. Sampling schedules and deliveries or shipments to the laboratory will be coordinated such that every attempt will be made to meet the recommended holding times of the analyses. Laboratory analyses performed outside the recommended holding times will be flagged or qualified appropriately in the report of analyses provided by the laboratory. 4.5 Chain -of -Custody of Samples EPA -accepted chain -of -custody (COC) procedures will be followed to maintain the validity of the groundwater samples being delivered to the laboratory. From the time the empty sample containers leave the laboratory until the issuing of the laboratory results, the samples and/or sample containers will be: 1) in sight of the assigned custodian, or 2) locked in a tamper proof location, or 3) sealed with a tamper proof seal. A written record of sample container possession and transference of samples will be documented on appropriate COC forms. The forms will also be used as a mechanism of communication between the sampling personnel and the analytical laboratory to note any specific details or requirements regarding the requested laboratory analysis. At the completion of the sampling event, a copy of the completed COC form, signed by all the appropriate entities handling the samples, will be retained with the laboratory report. 4.6 Quality Assurance and Quality Control Quality assurance (QA) and quality control (QC) procedures will be followed so that laboratory preparation, field sampling, and transport activities do not bias the results of the chemical analysis. QA/QC samples are collected to provide a quantitative basis for evaluating the analytical results. Typical QA/QC samples collected for groundwater sampling programs may include one or more of the following: Duplicate Sample - Duplicate samples are collected by the sampling personnel in a manner identical to the primary sample. The duplicate sample will be analyzed by the laboratory just as the primary sample is analyzed. The duplicate is intended to verify that the results from the primary sample are accurate and reproducible. Trip Blank - A trip blank consists of an analyte-free water sample prepared by the laboratory. The trip blank will accompany the sample container shipment from the laboratory to the field and back. At no time will the trip blank container(s) be opened in the field. Trip blanks will be analyzed by the laboratory only for volatile organic compounds. VA MSOLEN LG Everist Sampling Plan Page 8 of 10 Groundwater Quality Sampling Plan Field Blank - A field blank consists of empty sample bottles filled with distilled or deionized water at the sample site by sampling personnel. The field blank will also be analyzed by the laboratory as if it was a "real" sample. Equipment Blank - A variation of the field blank is the equipment blank. Equipment blanks are prepared in a manner identical to field blanks, except that distilled or deionized water is poured through clean (field decontaminated) sampling equipment and into the sample bottle. Equipment blank samples are analyzed for all analyses and are used to verify that sampling equipment is uncontaminated. At least one of the QA/QC sample methods will be conducted every 4 sample events, one in four, during the first five years of sampling. 5.0 Analytical Procedures Volatile organic constituents (VOCs) will be analyzed in accordance with Method 8260 of EPA Report SW -846, Test Methods for Evaluating Solid Waste, while inorganic constituents will be analyzed by Method 6010 of SW -846, or other appropriate EPA methods. Reporting limits (RLs) for the parameters analyzed will be the lowest concentrations that can be reliably achieved within the specified limits of precision and accuracy during routine laboratory operating conditions and will be below any promulgated maximum contaminant levels (MCLs). Instrument detection limits will be kept at or below the RLs. Some analytical results may be reported below the RL and above the Method Detection Limit (MDL) with an estimated value. These results will be flagged, and the result determined as an estimate and not a reported value. 6.0 Analytical Data Review Upon receipt of the analytical results, general analytical data evaluation (i.e., data validation) will be performed. At a minimum, this evaluation will address the following: • Overall data completeness; • A review of laboratory qualified data; • Comparison of field duplicate results to original sample results; • Comparison of trip blank and method blank results to sample results; • Review of data accuracy based on cation -anion balances, etc.; and • Review of laboratory QA/QC sample results including comparison to spike recoveries to control limits. Results of the data review will be documented and used to initiate additional review by the laboratory or possibly addition qualifications of the analytical data by the reviewer. MOLENS LG Everist Sampling Plan Page 9 of 10 Appendix A Sample Field Data Sheet GROUND WATER SAMPLING FIELD DATA SHEET SAMPLER SITE ASSISTANT PROJECT MANAGER Well No. (Date: Time: 'Personnel: Weather: Well Inspection (condition) a Casing Diameter (in) I Casing Stick-up: (ft) Meter Calibration: I Sampling Kit: Static (from Water Level: top of casing) (ft) Total Well Depth: (from top of casing) (ft) Time Taken Preservative Field Filtered Analysis Sample ID: Saturated Thickness:(ft) Casing Volume: (gal) Purging Equip. Purge Rate (if pump used) Purge Parameters: Time Temp (F°) EC (mS/cm) DO % DO (mg/L) pH pH mV ORP Turbidity Well evacuated to dryness? (Y/N) Time to recarge well? Sampling Information (from above): Time Temp (F°) EC (mS/cm3) DO % DO (mg/L) pH pH mV ORP Turbidity Immiscible Layer (Y/N) Sample Odor: Sample Appearance: Description and Notes: Checked by: Date: FM I'�/I S LE I`�l pvirotnent, Inc. LARRY E. O'BRIAN FOUNDER STEVAN L. O'BRIAN PRESIDENT March 4, 2025 via a -mail CTB@weld.gov Weld County Clerk to the Board Board of County Commissioners Office 1150 "0" Street Greeley, Colorado 80631 Re: L.G. Everist, Inc. - Ft Lupton Sand and Gravel M-1999-120 Adequacy Response - 01 Packet Dear Sir/Madam: 7985 VANCE DRIVE, SUITE 205A ARVADA, COLORADO 80003 303423-7297 FAX 303-423-7599 We are delivering to you here with a copy of the Adequacy response and supporting exhibits for the L.G. Everist, Inc, - Ft. Lupton Sand and Gravel mine application filed with you on November 19, 2024. Please place this packet with the original book. The original is on file with the Division of Reclamation, Mining & Safety. This copy of the permit application adequacy response is delivered to you pursuant to 34-32.5-112 (9) (a) , Colorado Revised Statutes 1995, as amended, which states in part: .... the applicant shall place a copy of such application for public inspection at the office of the Board and Office of the County Clerk and Recorder of the County in which the affected land is located. This packet must be kept with the book for public review until the application has been approved by the Division. Please acknowledge receipt of the copy of the permit adequacy response by datestampine this cover or signing in the appropriate space provided below and returning one copy of this letter to the person delivering it. Yours truly, ENVIRONMENT, INC. Stevan L. O'Brian enclosure . 0 E l . -_. v ti-m� 6 0 4 WELD COUNTY COMMISSIONERS w.aDE-11L-N-IDA1DAirkAKIrkivi( 1, eptii (UM DA] DI, M 513) 2025-0055 Epviromverfrt, LARRY E. O'BRIAN FOUNDER STEVAN L. O'BRIAN RIAN PRESIDENT April 3, 2025 Ms. Nikie Gagnon Division of Reclamation, Mining & Safety 1313 Sherman St., #215 Denver, CO 80215 Dear Nikie; 7985 VANCE DRIVE, SUITE 205A ARVADA, COLORADO} 80003 303-423-7297 FAX 303-423-7599 RE: L.G. Everist, Inc. Fort Lupton Sand and Gravel, Permit # M-1999-120 Adequacy Response #1 On behalf of my client L.G. Everist, Inc., I will respond to your February 5, 2025 and February 7, 2025, adequacy review letters, as needed, in the order and number format presented in those documents. We have copied each inquiry into this document for ease of review. Application Item 13 — Primary present land use 1. The Applicant selected Developed Water Resources as the present land use. This is not correct. According to Exhibit J, the current land use of the northern and southern areas is pastureland. Please correct Page 4 of the application and resubmit the page. Attached is a corrected page 4 of the Application Notice Requirements 2. As required by Rule 1.6.2(d) and 1.6.5(2), please submit proof of publication in a newspaper of general circulation in the locality of the proposed mining operation. Proof of publication may consist of either a copy of the last newspaper publication, to include the date published, or a notarized statement from the paper. Attached is the Proof of Publication. 3. As required by Rule 1.6.2 (e), please submit Proof of Notice to all Owners of Record of the surface and mineral rights of the affected land and the Owners of Record of all land surface within 200 feet of the boundary of affected land. Proof of Notice may be by submitting return receipts of a certified mailing or by proof of personal service. Attached are copies of the Certified mail receipts that were returned or a print out of USPS records of proof of deliver if the USPS failed to return the card. Public Comments (Rule 1.7.1) Environment, Inc. M -1999-12O - AM -O3 Adequacy Response #1 Page 2 April 3, 2025 4. The public comment period for this application closed on January 29, 2025, 20 days after the last date for the newspaper publication. The Division received timely comment letters from the Division of Water Resources, one adjacent landowner, and the Platte Valley Irrigation Company. The comment letters are attached for your review. Please acknowledge and address the comments noted in the letters and make changes to the application/exhibits as necessary. As part of this packet I have prepared a response to each commentors and attached the responses. 6.4 Specific Exhibit Requirements - Regular 112 operations The following items must be addressed by the Applicant to satisfy the requirements of C.R.S. 34-32.5- 101 et seq. and the Mineral Rules and Regulations of the Mined Land Reclamation Board: 6.4.3 Exhibit C — Pre -Mining and Mining Plan Map(s) of Affected Lands 5. The adjacent NCCI Mine (M2001-107), operated by Northern Colorado Constructors, recently installed a French drain east of the Northwest amendment area. Please show this feature on the C-2 Structures Map As noted this structure was installed after the application as file. Attached is a copy of Map Exhibit C-2 - Structures with the French Drain added. 6.4.4 Exhibit D - Mining Plan 6. Existing Conditions. In the first paragraph, the Applicant states that the future intent is to eventually remove the southern area from this permit into a new application that is being prepared. Per Rule 6.4.4 please discuss the timeline for submitting the new application and mining the south end of the current permit area. At the current time, there is no fixed timetable for submitting the new application. It could happen within the next 18 to 24 months, or not at all. As for startup of mining on the southern area of the existing permit, as we stated in the application file, we will complete mining and a significant amount of reclamation of the northern area of the permit - including the new amendment phases - before moving t0 the southern part of the existing permit. Then the plant site will be moved to the southern area of the existing permit, and the area will be mined as shown on Map Exhibit C-1 - Mining Plan Map. When/If we submit a new application for a new permit to the south of the existing southern area, the new application will include new properties and the existing southern area. Once the new application is approved, we will request release of the existing southern permit area from this permit. Of course, the new appli- cation would detail all mining timelines, direction, etc. 7. River Setback and Bank Armoring. The Applicant states the South Platte River is within 400 feet of the mining area along the east sides of the Northeast Phases 1 and 3 in the amendment area and the slurry wall will be installed at least 200 feet from the edge of the river. The proposed mining setback is 275 feet from the riverbank. Based on Table 1 in the Division's 2024 Floodplain Protection Standards for Sand and Gravel Pits (attached), the standard setback is 400 feet where no pitside bank or riverbank protection is required, and 300 feet is the minimum setback for pit side armoring only. The Environment, Inc. M-1999-120 - AM -O3 Adequacy Response #1 Page 3 April 3, 2025 Applicant proposes to armor approximately 2000 feet of the pit side bank in the two areas, however, the Division recommends moving the mining setback to 300 feet along the eastern perimeter, if no armoring of the riverbank is allowed/proposed. Thank you for catching this. When I was laying out the proposed mining area I was maximizing the area to be mined and forgot about the 300 feet that MHFCD used. Since LG Everist has to armor any areas within 400 feet of the river we are modifying the mining plan to recover the lost material that the new setback distance will require us to leave. The following information is t he same as approved at out West Farm Reservoirs and more detail has been added to the Mining and Reclamation Plans and the Bond e stimate. In simple terms, the areas within 400 feet of the ✓ iver will be mined within 250 feet of the top bank of the river and then that area will be backfilled using native material from t he floor of the mined area. They will rebuild this 50 foot wide band so the top of the 3h to 1v slope will begin at 300 feet, covered with gravel and then will be armored as described in the armoring plan. Note that the same method is proposed for the area along the east side of the Parker #4 phase but there is ✓ iver bank armoring in that area so the final setback will be 250 feet from river bank to the top of the reservoir slope. 8. Northwest Phase. The Mining Plan states that the Northwest Phase is broken into 3 use areas, farm yard with a house, wetland/creek area and agricultural production. Mining will take place in the yard and agricultural area. During the pre -operation inspection, the Division observed a large wetland in the proposed amendment area associated with Little Dry Creek. Please describe how the mining operation will be conducted in this phase and discuss how the operation will avoid impacts to the wetland and associated Little Dry Creek. The alleged wetland area observed during the inspection is in the northeast part of the Northwest Phase. No jurisdictional deter— mination has been done for this area so we are hesitant to call it wetlands at this time. Since installation of the NCCI French drain (aka underdrain) along the east property line, much of this area is already drying up. As noted in Exhibit D - Mining Plan, and shown on Map Exhibit C-1 - Mining Plan Map, L.G. Everist is planning to install a slurry wall liner in the Northwest Phase to t he west of Little Dry Creek and the alleged wetland area prior t o commencing mining. Installation of a slurry wall will elimi- nate any ground water draw down in this area. We also have mining setbacks of 50 feet from Little Dry Creek and 15 ft from the slurry wall. 6.4.5 Exhibit E - Reclamation Plan 9. Inert Fill. On Page 11 of the Reclamation Plan, the Operator states that some inert fill may be imported for recycling and resale or in rare cases for reclamation purposes, specifically bank sloping and buried in bank areas around the lakes. Per Rule 3.1.5(9), if an operator intends to backfill inert structural fill generated outside the approved permit area, the Operator shall submit a Notice to the Office which includes the approximate volume of inert material to be backfilled, a general engineering plan stating how the material will be placed and stabilized, and the approximate dates of activity. The Inert Fill Notice included as an appendix to the application generally answers these questions, however, please commit to submitting a Notice to the Office that meets Rule 3.1.5(9), and provide more specifics, if the reclamation plan is altered to include backfilling large areas within any mining pits Environment, Inc. M-1999-120 - AM -03 Adequacy Response #1 Page 4 Apri 13, 2025 L.G. Everist supplied and Inert Fill Notice and affidavit with the application starting on page 109. They committed to retain records and volume of material imported and the location it was placed for the Division review. If large quantities of inert fill are used to backfill areas in any mining pits, that is in addition to the armoring shown on the Reclamation Plan Map, the DRMS will be provided that information in the Annual Report following the date of placement. Since the mined areas are intended as Water Storage Reservoirs we do not believe this will be needed. The largest qualities of inert fill (concrete), as described in the application, will be used for bank armoring where needed within 300 feet of the South Platte River banks. 6.4.7 Exhibit G - Water Information 10. Potential Water Resource Impacts. The Mining Plan states that nineteen of the twenty mined areas in the permit area will be sealed with either a slurry wall or clay liner and developed into a series of water storage reservoirs ranging from 10 to 70 acres. Currently, slurry walls have been installed around 5 mined areas and six areas that were previously released from the permit. Once this site is fully developed, approximately two miles of slurry walls will be installed adjacent to the South Platte River under this permit alone. In Exhibit G, the Applicant refers to a 2004 groundwater study that was conducted for Amendment 1 for the existing permit area. However, a significant amount of mining has occurred in this region over the past twenty years. The adjacent NCCI Pit #1 (M2001-107), operated by Northern Colorado Constructors, recently installed a slurry wall between the northwest and northeast Ft. Lupton proposed amendment areas, and the operator has informed the Division they will be submitting an amendment to add another lined storage facility to the north. It is important to note that there are three residences between the NCCI Pit and the proposed northeast amendment area. Additionally, Burnco operates the Inouye Gravel Mine, south of the Ft. Lupton permit area, which is approved for three lined reservoirs. Per Rule 3.1.6, please submit a new groundwater study and model that demonstrates disturbances to the prevailing hydrologic balance of the affected land and of the surrounding area will be minimized both during and after mining operations and during reclamation activities. The study needs to include the proposed developed water resources and those developed water resource structures, approved and proposed, located immediately adjacent to the proposed amendment area. Included in the submittal shall be a demonstration of the effectiveness of any proposed mitigation measures. Please find attached a copy of the groundwater study prepared by Schnable Engineering for the areas surrounding the amendment areas on the north end of the mine. Please note in certain areas of the South Platte River Basin, staff of the Division of Water Resources has observed groundwater problems that appear to be related to the lining of gravel pits located near streams, and in particular, these problems occur when multiple liners are located adjacent to each other. The Division of Water Resources requests operators consider the siting and design of lined gravel pits to ensure that they will not individually, or cumulatively, result in impacts to the timing and quantity of groundwater flow from upgradient locations back to the stream system. In addition to impacts to property, such as flooding upgradient and reduced water levels downgradient of the liner, there are decrees of the court that specify the timing, quantity and amount of water depleted from the streams by wells and accreted to the stream through recharge operations. The installation of a gravel pit liner should not result in changes to the timing, location, and amount of such groundwater flow. Environment, Inc. M-1999-120 - AM -03 Adequacy Response #1 Page 5 Apri 13, 2025 Thank you for the information. Review of the water data col- lected since 2012 for mine site including the areas around the complete liners indicate there have been no significant groundwa- t er level increases that approached the mitigation triggers LGE t as for this mine. All monitoring well data has been provided to t he Division with each Annual Report starting in 2013, the first year after the Amendment 02 was approved. 11. Ground Water Wells. The text states that 4 additional groundwater monitoring/water quality monitor- ing wells around the Northeast and the Northwest Phases were installed and data collection began in the first quarter of 2024. Please submit 5 quarters of baseline data for wells MW -02n, MW -01n, MW -03n, and MW -04n to the Division for review. If five quarters of data is not available prior to the decision on this application, please commit to submitting the baseline data in a Technical Revision prior to any mining disturbance in the amendment areas. We have completed 4 quarters and 2nd Quarter 2025 is the final and 5th data collection point needed. Once we have that informa- t ion and the final analysis is complete, L.G. Everist, Inc will provide the report as a Technical Revision. 6.4.13 Exhibit M - Other Permit and Licenses 12. Please commit to providing copies of all required and approved permits and licenses to the Division when available. As discussed, we have supplied the Division with the list of o ther permits and licenses as required. It is up to the operator t o have the other agency permits and to be in compliance with t hem. We can supply copies of other —agency permits if requested, due to a complaint or non—compliance issue. 6.4.18 Exhibit R - Proof of Filing with County Clerk and Recorder 13. Please provide an affidavit or receipt indicating the date on which the revised application information required to address this adequacy letter was placed with the Weld County Clerk and Recorder for public review, pursuant to Subparagraph 1.6.2(1)©). I will provide Proof of Placement with the Weld County Clerk to t he Boards office in a separate submittal from this adequacy ✓ esponse. 6.4.19 Exhibit S - Permanent Man-made Structures The Division will require the Applicant to demonstrate they attempted to obtain notarized structure agreements with all owners of the structures within 200 feet of the affected area of the proposed mine site, pursuant to Rule 6.4.19, prior to the Division's consideration of a stability analysis. Copies of the mailing receipts for the 14 new structure owners surrounding the mine were included in Exhibit S, except the City o f Thornton since the French Drain was installed after the appli- cation was filed. LGE mailed a new structure agreement to Thorn- t on and proof of that mailing is included. 14. Please provide the Division with copies of all signed structure agreements with the owners of permanent man-made structures within 200 feet the proposed affected area boundary. Environment, Inc. M-1999-120 - AM -O3 Adequacy Response #1 Page 6 Apri 13, 2025 Attached are copies of 3 new agreements that have been signed and ✓ eturned. If more are received they will be provided to the Division. 15. Please obtain and submit a structure agreement for the Outlet Ditch in the Northwest Amendment Area, referenced in the comment letter sent to the Division from Lyon Gaddis, representing the Platte Valley Irrigation Company. L.G. Everist, Inc contacted Platte Valley Irrigation Company (PVIC) and has worked out an agreement. The objection has been withdrawn. We will provide a copy of the signed agreements for t he file once we have them. 16. The adjacent NCCI Mine (M2001-107), operated by Northern Colorado Constructors, recently installed a French drain east of the Northwest amendment area. If the drain is within 200 feet of the permit area, please submit a structure agreement for this feature. A structure agreement was sent to the owners, City of Thornton, o n March 17, 2025. If it is returned, a copy will be supplied to t he Division for the record. If it is not returned, then the structure requirements shall be covered by the Geotechnical Stability analysis which demonstrates that any structures within 200 feet of the permit area shall not be damaged by mining or ✓ eclamation activities. In addition, two other agreements were sent to a structure owner missed on the initial investigation and a repeat mailing on a wrong address. Copies of the mailing receipts for the 3 new mailings are attached. 17. If the Applicant is unable to obtain notarized structure agreements with all owners, per Rule 6.4.19(b), please submit an engineering evaluation that demonstrates that the structures within 200 feet shall not be damaged by the activities occurring at the mining operation. A Geotechnical evaluation is on file with the Division for this mine. It was prepared in 8/31/2004 on the basis that the closest structure to any mining areas will be the slurry wall so any structures outside the liner would not be affected. Second adequacy from DRMS Engineering 2/7/2025 1. The Division requires that the "Floodplain Protection Standards for Sand and Gravel Pits Adjacent to Rivers and Perennial Streams" (February 2024) (Floodplain Standards) be applied to the South Area as well as the Northeast Area. This will limit damage to property and infrastructure in this area during flood events and reduce the possibility of "stream capture" of the South Platte River. The exhibits, both text and maps, need to be revised to reflect this additional protection. Any existing armoring of riverbanks may be accounted for in the application of the Floodplain Standards. We have updated the Mining and Reclamation Plans and the armoring P lan to reflect the requirement in the Floodplain Standards document. On the north end there is no river -side armoring, so t he minimum top of slope setbacks are 300 feet. On the South area where the river varies from 135 to 500 feet, the river -side Environment, Inc. M-1999-120 - AM -O3 Adequacy Response #1 Page 7 April 3, 2025 bank has been armored from the Bridge on CR 14.5 north for 1675 feet. Therefore, in this area the minimum setback allowed accord- ing to the Floodplain standards is 250 feet. 2. The text within the Bank Armoring Plan (page 111) states, "The two phases that have mining within 400 feet of the South Platte River are Northeast #1 and Northeast #3." Please explain why this text excludes other areas of the mine that are within 400 feet of the river. Revise the text as appropriate. This refers to the amendment area where the river is within 400 feet of the mining area. No other Phases are within 400 feet until you go to the existing southern permit area. However, that area is not changed by this amendment, since the reclamation plan for the south area was approved in 2012 and was not subject to t he 2024 Floodplain Standard. However, we reviewed the setback on the east side of the Parker #4 Phase that is within 400 feet of the river. As discussed in item #7 above, it was decided since the river side bank was armored for a length of 1670 feet north of the CR 14.5 bridge, t his area could have a setback of 250 feet without armoring the reservoir side. We revised the Mining and Reclamation Plans and t he Map Exhibit C-1 Mining Plan and Exhibit F - Reclamation Plan Map to leave the final top of bank no closer than 250 feet from the river but will not armor that area. 3. The text within the Bank Armoring Plan (page 111) states that there is a setback of 275 feet from the riverbank to the limits of mining. However, as discussed in the Division's Floodplain Standards (page 3), if only pitside armoring is used, the setback from the riverbank must be 300 feet or more. The exhibits, both text and maps, need to be revised to reflect this change. As noted in response to item 7 of the first adequacy review we h ave corrected that and made the necessary changes of the Mining and Reclamation Plans and Maps. 4. The text within Reservoir Bank Armoring Methods and Materials (page 111) states that the armored face is 35 feet wide and that 2.35 cyd/1ft of material will be required. The text should include some discussion regarding the calculation of these values. I reviewed my calculation and I found the slope length should h ave been 31.6 ft not 35 feet. So I have corrected that and added a formula using that number and the depth of 2 feet to reach the 2.34 cyd/lft. 5. The Bank Armoring Plan should include a discussion of the methodology used for the design, including references. References might include a professional article, a textbook, and/or a drainage criteria manual (from, for example, Weld County or CDOT). It should be noted that this Bank Armoring Plan was approved by t he Division for use on two other permits operated by L.G. Everist- Ragsdale Reservoirs, M-2020-007; and West Farms Reser- voirs, M-2022-048. All of the design criteria and numbers were derived using the UDFCD guidance document from January 2013 and information proved by Mr. Tim Cazier of the DRMS staff. I have Environment, Inc. M-1999-120 - AM -O3 Adequacy Response #1 Page 8 Apri 13, 2025 updated the Bank Armoring Plan changes. LIST OF ATTACHMENTS TO THIS RESPONSE: Corrected Page 4 of Application form Proof of Publication Adjoining Owner Return Receipts Responses to commentors's Exhibit C - Current Conditions Map revised Exhibit C-2 - Structures Map revised Exhibit C-1 - Mining Plan Map revised to incorporate your suggested Exhibit D - Mining Plan revised Exhibit E - Reclamation Plan revised Exhibit F - Reclamation Plan Map Revised Schnable Engineering Groundwater Study 3 new signed Structure agreements Proof of mailing for 3 more Structure agreements Bank Armoring Plan - revised I hope these responses have addressed the adequacy questions you had. I will place a copy of this packet with the Weld County Clerks' office as required. If you have any questions please call me. Sincerely, Environment, Inc Stevan L. O'Brian President cc L.G. Everist, Inc. Weld County Clerk file enclosures 12. Priman- future (Post -mining) land use (check one): Pastureland(PL) Forestiy (F) Recreation( .+ ) Cropland(CR) Rangeland(RL) Residential(RS) Developed Water Resources('.) Primary present land use (check Barue) cropland(CR) Rangeland(RL) Residential(RS) Pastureland(PL) Forestry (FR) Recreation(RC) Developed 'mater Resources( VR) D D General Agrieulture(GA) ' �'i1d1il`e Hab►itat(WL) Industrial/Commercial( IC) Solid Waste Disposal(WD) enenil Agrieulture(GA) ' x'11 u�Ce Habitat(W L) Industriali ona ereia1(IC) 14 NIettlod of Minin Briefly explain mining method (e.g. truc shovel): Trac hoe and front end loaders remove material for delivery to the processing plant. On Site Processing: J� l Crushing/Screening 1 _ _ 1 Briefly explain mining method (e.g. true shovel): Material is processed into specification aggregates using crashers, and screen plants List any designated chemicals or acid -producing materials to be used or stored within permit area: Nome 16. Description of Amendment or Conversion: If ) on are amending or converting an existing operation, provide a brie'narrative describing the proposed change(s). This amendment increases the mine area and reserves under permit by 202.26 acres. The mining method does not change but the plant site may be moved south as the north permit area is mined out. The final reclamation plan and reclamation methods do net change. The primary access remains as currently approved. The southern access point is - 40d05'40.41"N, 04d4 148.1 7"W LG. Everist, Inc. Proof of Publication Ft. Lupton Sand & Gravel AM -Q4 4/3/2025 Colorado Community Media 750 W. Hampden Ave. Suite 225 Englewood, CO 80110 Environment, Inc.** 7985 Vance Dr., #205A Arvada CO 80003 Stag of Colorado County of Weld AFFIDAVIT OF PUBLICATION } }ss This Affidavit of Publication for the Fort Lupton Press, a weekly newspaper, printed and published for the County of 'veld, State of Colorado, hereby certifies that the attached legal notice was published in said newspaper once in each week, for 4 successive week(s), the last of which publication was made 1/9/2025, and that copies of each number of said paper in which said Public Notice was published were delivered by carriers or transmitted by maul to each of the subscribers of said paper, according to their accustomed made of business in this office. For the Fort Lupton Press State of Colorado } County of Arapahoe } ss The above Affidavit and Certificate of Publication was subscribed and sworn to before me by the above named Linda Shapley, publisher of said newspaper, who is personally known to me to he the identical person in the above certificate on 1/9/2025. Linda Shapley has verified to me that she has adopted an electronic signature to function as her signature on this document. 201.34029393-x84210 Jean Schaffer Notary Public y commission ends January 19, 2028 ilhasilbalsabadfras:a-ilv A � .Eu, scHnFFER NOTARY PUBLIC - STATE OF COLORADO NOTARY ID 20134029361 MY COMMISSION EXPIRES JAN f 6, 2028 nilltrarge _ PUBUC NOTICE Pu8LISNED NOTICE OF APPLICATION AMENDMENT FILING FOR A REGULAR (112) CONSTRUCTION 61ATERIAL3 REGLdAmATioN pellttal!' L.G. Evens!. ticorporated has filed an app icatinn aninnrimant to their RacJsm ation Permit with the Colorado Mined Land Reclamation Board under the provisions of the Colorado Mined Land Reclamation Act for the eitraction of construction melonals. The mine is known as the Fort Lupton Sand and Gravel Mine (permit # M-1999-120) and is located in parts of Sections 19. 30 & 31. FESR-1N and mete ryi Reartinne 2A A 36. T -2 -No R-87-01. 6th Principal Meridian, Weld County. Colorado. The data of commencement for this mime was 1999 and the proposed date of completion Oeoornbor 2060. The prep.:mod future use of the land is as developed water storage. Additional Inforrnabon and true Wntative d rision data may ha nt%tained from thci Division of Reclamation. Mining 6 Safety. 1313 Sherman St.. Suit 2115, Denver. CO 60203 (303) 866-3567. Or at the Weld Courdy Clerk to the girds office. 1150 tie St_. Greeley. Colorado 80632, or the above named applicant, Comments must he in wr► in() and must be received by the DMSion of Reclamation, Mining & Safety by 4:00 p.m. on January 29, 2025. Picas° nova that comments related to melee} trtiGic by ffc. hours of operation,. visual rimpacls. effects ors orooartw vahres and other social or Ccvrhoo7nlc concerns are issues not sullied to this Mrs's fu'l��lo'c; drc�v o. 7rlia4ov aui)iti dZi 4/11144111 ogees. ale tycsically addressed by VOW 'twat Governments. tether that the Division of ,Reclamation_ ?Wincing Safety or the Mined Land Reclamation Board. I Everitt, Iroc. Flend'erson. Colorado Legal Notice No. FLP1175 First Publiealiorl: ieeember 19. 2024 t act Puhlicalrnn- January g, 202c Publisher: Fort Lupton P a • s LEvensl Ft Lupton Sand and Gravel M-1999-120 Fietrun Receipts - 316/2025 - FORT LUPT N - DRMS + Exhibit 0 = PUBLIC NOTICE 'tiers -of-Record, and Rig h otaWay asernent Holders fop Key 4 r'MERGE) titan Address i1 RO:Ei Mail C ity IMAGE) if MERGE) Stn. Mali Zip oltiiEW3E1 Ctrt Mail# Mailing-D� Deimp/'Flag LGa E,nrist= ra rpotste i 350 8 Attain Avenue, Suite 400 SIOUX X Falls SD fitlailtittl nm nege�:i (iapi is a nl) �'`'3 �a 571044551 2 Michael Bach ler PO BOX 11 Alban OR 97321 i3E� If �Yp�La1f�-i7i �i 304001- :8705-5714 1211812024 get Wien foci ' Angela Campbell K & Nkholas ,rte 127A 1 14 112 Cot iaty Road Fort Lupton CO X21 1� 12,441��1 �+I new moot 2-3330 1- o x' 6,5721 4 Thotntonr City 01 9600 Civic Center Drive CO 80 4326 -�4330-X8►1- 6709,5738 �T�� 12118/2024 'THit'al B r = Ttir`Ytvi ri+ ar Freddy E & Lisa] i Dodge 11992 18 County Road !Foot Lupton a_ CO son till ftvian 4 to i vial !te'r 7072-3330-0001= 0-7 4 745 E Richard Hein 5290 E Yale arclel, Suite 1 �3 Denver '12'18"2024 � tit Priori 3-4 -3300l_ 802224;827 ��` Darrell Etiara#O 1 N+lva M 9208 County Road 2E Pon Lupton X1-316 7022-333CI-0D0lla7 67054775____ 12114 _ Got mon Raul 8 Bronn & Renea Stra 12 335 aunty Road 14 1J2 Fart Lupton CO ! 4. fivten0�'is 7012-�- �� 1- _ gel �r4turi rieseot Gary A Strantge & Larry J Torres 602 Hearthstone Ayen4� - B�ri>�17fi�'.n CO' - _p+ - .• k - • i �,�'+hE 7022'-3330-0001- �� y+�p 1 �t+�1 �° i�'2�L,t, 4 01-c iii,4l1 tisCK ° S _o_ riziG',4m9 Nig vans' 10 Aurora, City � 15151 Pa E Alameda y„ #3100 py� Aurora ISO 12-1 WS 7022,3331Y-0001- 670568C6 t2i112024 ikapTilikr , � - W.�at�- fiativa in tin' 11 Tricycle Lane Texas iittlan %lily "Street Henderson CO X11 7022=3330=0001= 12/1812024i 24i recceLLB'67054813 _ Penny J Rankin 1 n i County Road 1+41 ,_ Fort Lupton I i 2-33 _ 1- � __,„ CO X21- 14 "12`180 , � m roma fga Font Lupton,`pity of 130 s McKinley Avenue FortLupton8°821-•13 12'1' 02'x' °! _ �.,rnr�� Front - 7022a33304001a 877 141 South Platte Valley Historical Society PO BOX 633 FCC Lupton CO � 80621 3 � ��1= 6705-5144 - 12/1812024 qui !return recce T Jose Marivel G I�ubalcava Ruiz & 11 14 490 County Road 1J F' Lupton CO 21.83 t : 2-33 isposimei '1- 12'1 i� rr� Lupton Real Estate West LLCr, a i Colorado LLC P.O. Box 208 Fit Lupton N� +� 1 1211812024 Di fttit� ni ciex 1 7022-3330-0001- 6705-5368 17 Anna fitVe U rb l� 11400 County Road 141 IFS Lupton on CO' 621-63 -11 7022-33304001s 1211 4 i I worn recto12 -- '� 1,4. Todd & Bonnie M Miller 11420 +off Road 14 1n Fort Lupton CO 80821=8813 r 1211 12O24 rapt town r[a^� ga 7022-3330-0001- s rc. Quaid I' greyr Living Tru3t 'Count Road 23 �" 1;2 Fort Lupton CO 621 1' 7022 .�� 4fi- 1211812024 gcli mem mow 6705 5899 Frances R Funakos hi Living Trust 67578 County Road 23 1/2 Fort Lu lion � CO soan 1 a ' 7022-3330-0001- 8705i-5906 t f+ '&2024 ►ot far oat a'1 T Allmon 1 LGordon700$ County Road 23 112 IF fi - Lip �� r � X21- 1 ��_�{� � t i t . r;i M= t 1$� 0' ≥ wrimeprit 2:1 Joyce f4 Vinson PO IBOX 1092 flitting, r .„., _ Roger E & Judy D Patterson PO BOX 11 l= rC 4_upitmen I 1 1 1 � a 1 11f� � 0 �� ^ 'f/��-'��isi'.c` �- r�a�a" iec JhJ _ David Bell 11580 Country Road+1� 18 =°:r t ; �!�"'1��02� i$t4tin IIPCOCIt E 26 Thomas Lean Bornh Fort Lupton CO , 80621 11 2 2- I 1, 6705-5960 12118;2024 u.crirown iEckt,t 11 18 County ' Sandra B Rakowski & F u 1 Camarillo 1 U67r County Rod 1 Fort Lupton CO X1 1 12'1&2024 'mourn rw�: a a' 2-33313-0001- :E.��-� 7 26 Salvador Madera 7307 Richard AvenueFob Lu g ' t= '12'1�`2�d� RETURNED - 4 .C frocking --:innairri+rad 1X121 �� Laurie L & Rene Salinas X20 County Road 23 Fob Lu,p#gin �� 1 1��'1 � l Wpm nowt �l- � , �. _�v� Robert W & Marry Ann Kerr 1110 county Road 0 IF�ort Lu p - �_: 1 12'1 return ra t r 31 Mmy Ann Uh4 Flo 8€07 County (Road 26 i1=�rt Lu p�l�'� � �� ' "t -6� Tw X 1 1- "4 ��i recant riptiorie StacyA. BJerke Ai4lr en a ECurb. . 11� {County Road Fort Lia,pt 7 �'� � 1 � E uS 1'2'181+ i ��M r 1 L.G. Even st l Ft Lupton 'Sand and Gravel M-1999-120 tru n R.ec e o pts - 316/2025 FORT h'U PaT N - 0 - Exhibit O - PUBUC NOTICE to Owners -of -Record, and Rig ht-of-WaylEasement Holders IMO Ktv S r'MERGEp Fi Address 'MERGE] WM C MERGE) p�lERCEI State ZRp gsismog Cart Mail it i l► ilium Dais Del � t� + 37' Sir Estate ron-Menendez Real ventures. I_LC 14 751 Road iE County mine Longman CO��y,� CO �y��y70242-3330-000i- 1 + 1 d��1� ±�J��y 6 � / 11Ls!'� 024 .. .. s. [gill Y d ticA it 67 `A Parker Family (Land I f1?Il rail ► LLB 1 CO9062143805 I % p I �-� mo.=s� rk,--: fedc-, 12877 1 unty Road �-�� '�.� � �= — t�OW-fir *- I� le.a torte 1 y fienv�r CO lit1't.. ... � 1� �t� 1675 are m ay, 61117O22-3330-OOO1s � � Arai rrmile t. *` rit.lG r e i- 1 RINV- ■ Petro G raiing :Company, LLC Place. 33 E. Eastern Suite 112 Centennial CO aD l 12.2105. 1= 7022-J33043001s 67054063 12/154202g1 I Etetretorn rtowt P —ow- V' Id E: �n►t w l�i��l�r Works i 1' SO 0 s reef Greet ey �� 7 �tio€32 �'-i�-�01- livi 4 Q01 return reelect 67054070 Raptie-= Ioirado „ ipe Interstaae ROW i nes A, Ga - Wemern i°.�. _� ox 1067 Colorado �,�' �' CO � SHOULD BE 7022-3=i'R-, �7 t2'1 4l gel Mum reed - $01, not $0944.'� N'_`4. -=. United Powell ;1.0. �.. 1 Box 929, 111551 ��Cl� Ave B1 F�torl �..7022-3,330-0001e r� ��i � 121 41 i��6�1 ��, -, mum real* I ROW-.11:IRow i 7022-33-30s 6705-6 COG 1 DO oat ceVarn rticect Xcel Ene gy (P-SCO) - 1 600 IEth Aim_ Greeley CO B0E3 II 12118/2024 R viii,41 Century ,Irk (Qv 11301 � Suitt California '1 GOO Sin Denver c0 � 't�0 i 1214 , tritium l� hay benefit M li5Li.��Rfr!'pi/'1= 67` 117 s-•°, R2,16 lim pion I�i�anyf� (Corky" Bottom dol�l��r Cantrell Ditch �e+ �,�� F1 L��i�n COCO6705-6124� ' �' t= U�1= 024' fit:TURNED - I1 "1lt It erarti' rob 1 Vie - e Island Ritchie Ditch yaks a l 13;B95 Ur1 ROMA? 1 P'1a1try SRI CO 90651 1 024 0,,A Limn'rrpoott 16613 1- 0668-71't �; ,- ., Ft .. o6 Matte Vane, ill IgatIon Company 4'W 14311,1 stGreeley CO SOS 0668=7191 i2111/2024. eel Mori i row fr Level 3 tl 1025 Eldorado SIVE) BECOMitielti CRS 80021 3015,13 0668-72071 10 1211812024 got ileum receiptCio1'11munic r LiG„ Everi st Inc, Ft Lupton Sand and Gravel ecru n Receipts - 3/6/2025. •• e a • Oa IIIIJA 4 .,. ® Complete iterns 1 w h and 3. • Print your name and address On the reverse. so that sw can return the car to you. ■ Attach this. card 'to the back of the maillpriecei or on the front if spice permits., 1.. ,,icl'e Add to: :.' M chael Bachcifer PO BOX 11, Albany0 OR !.97321a0435 1111111111u11{IINIIII�II�IAII1��Ihl 9590 9402 8279 3094 9863 8 2 itrtlnl'in ?'fir rrr'rbar firratt°ciP :RNA 7022 3330 0001 L705 5714 -rt.; the f 1. • rkt cldressee Ct Data, of Delivery 11,245.0,47 Da Is delivery addres3 ill' from Item 1'? Yes If'h E enter deanery a o CI No 3, Services Type 0 PAnwity Mail CI ii:lastt Striatum 0 Registoul Mart %mat signakte Reek/kW wry 0 'MetedI Rear thEl Gentled Magill) Y ,r�≥ rd Mail Rest.MINIM Cl. Signature Catlinrnual 0 Csolliact on Cielbstery ® Signature Canillirrisnaina 11310ellost at Dewey Restricted Defter/ ResnricteclDefivety t Q Insured Mail Q insurredMilil Fle mated Delivery a {over_' ; PS Form 3811, Jury 2020 PSN 7530,-02-0004063 SENDER: COMPLETE THIS SECTION n i Complete items l and 3. is Print yair name and address, on the reverse so that we can return the d to you., ■ Attach this card to the back of the rrleii piece. or on the front if spy permits, 1, 0kel i do PoeldieMed tt. Angela Kt Nicholas C Campbell 12341 bounty Road 14 1/ Fort Leptons CO 80621-8814 i IMO 9590 940.2 8 79 3094. 9863 7 Domeslic Reiurn Receipt COMPLETE ThriS SECTION ON DELIVERY X '© Agent 0 Ad'clressee etIVOry D, le res. fidiffekt fro fie 1? ® Yo If H`I`S, enter d .v1 address below: O N 2, A-OKA NI Imhof!' akintsicor from Aickniiirva 7022 3330 00'1 67 5 5721 I j 3. woe Type 10 Adult Ssarrature p Ad'uCt Edrits.urt, 1=1alricted Delivery ''. Certi tied Mare Ceorlified Restrittoci Delivery 0 Collect on Detlwrry Collect on DetivertP Retioted DPOotely El Mind Mail 0 hstrred Mall Restricted Delivery SSW), PS Form 110 Ju !: 2020 PSN 753042430-90S3 Ptlaily *MI Express" 0 Registered Mahe' O tilered ReSirlotedi I ebvery CI **lure Callirmartkinirli 0 Sigglaille Cirri& Reititted �f Qom ti Return Receipt. I Lia Everist Inc. Ma1999-1 0 Ft Lupton Sand and Gravel Retrun Receipts - 3/612025 LISPS Tracking® For .site: Fort Lupton 1 1 ilir : DBMS Exa0 a Public Notice letter dent to: City of Thornton Tracking ember: 70223330000167055738 Copy Add to Informed (Deliver ps://informeddelivericusptcon0 Latest Update FA.Cis Remove Your package will arrive later than expected. but is still on its moray. It is currenttyin transit to the next faal ty, Get More Out of US -PS Tracking: U P 'Tracking Plus Moving Through Network in Tlran s it to next- Facility, Arriving Late December 25, 2'024 • Departed LISPS Regional Facility DENVEIR CO DISTRIBUTION CENTER December 2'0p x'024, 9,40 am Arrived at USPS Regional Facility DENVER CO DISTRIBUTION CENTER December 19t x'024 , 8:49 pm Defied Post Office Oil lMERGE CITY, CO 8002.2 Decem'ber la, 20.24,, 003 pm LISPS in possession of tear COMMERCE IT'S,. CO 80022 Deoem.b r 1, 2024, 1:14 pm Ct. Cr http usps:.corrugroarackCorifirm chon7gtej a el.'i =702233300001 6 7 LiG„ Everi st Inc, Ft Lupton Sand and Gravel ecru n Receipts - 31612025 i r ■ Complete Its 1„ andt-3. Print your name and address on the reverse so that return the cad to you. ■ Attach this card to the backof the maiteceri or on the front if space permits. Article A.sed to; Freddy E Lisa .I Dodge 11992 CounRoad 1 FortLupton, CO 80621-i8804 1111111111fill '590 9402 8279 3094 98'3 51 1 Article Number (Transfer from serfrice P ?02'2 3330 0001 :705 5745 COMPLETE ThriS SECPON ON DELIVERY A, Signature d El Agent C1 Addn3ssee IC.. Cate of Delivery Dr lierniery add.. z a. til 4ficrent from item 17- D Yell '3, Service Ty; O iii; Signal O ,brit Signal" Restricted Dever/ Conitic4 MaSi D Certified Mall Restricted Delyery 0 Collect on Dietary C) Collect on Delivery Restricted Delivery D Insured man Insured Mai RosIrle:ted Delivey Wet S5CJI:(i Registered Mehra Fostered boskail Restricted Delivery D r i a,4 'i1 emelkM1Pa Restricted Oelinry PS Form 3811 r JulyCCO P$444 7=-02-0011,9053 SENDER: COMPLETE THIS SECTIONN' Complete items 1, 2, and 34 is Print your name and address -on the reverse so that we- can return the tad to you., • Attach this cad to the back of the mailpfece, or Oil the froint I,t spy permits, Aldo Acidresli to: I Richard Hein 5290 E Yale Circle. Suite 103 Denver,. CO 80:222-6927 Ell 111,111111,1 VII19NIu�WIIIN 9590 9'402 5569 91274 2184 95 LlOrnestc Return ReCalp it co P° PLErE F iss sEenoN ON ,LIVERY' A, � 4nature D Agent D Addressee a Received by(Primed' Nome) Aare of DeliveryD. is deliver/ address differed from lbw 1? Ci SOW If YES, enter deliveno address belowD No 2.. Article Number 'Transfer from service lam ` 7022 3330 DE101 005 5769 3h Service Type D Adult Sigriaiute+ Li ,adult Signaluiv ReSiliCied DelaterY Ill Certified Male to +uroped half Restrict- ad Dalivery 0 © coact on Dellvety wed Delivery 0 Insured Mall C9 P'Tk/ili IS EnDitntte C risiVigiWed Mae El R #tend91 iRettritied Lxineery l; Return Receipt for Novercna disoi O Signature Coiriarmal ,ym O Swan Ocrilkrnarim PS Form 3611, ,Judy 2015 PSI17530-02-0004.9063 3 is O- L.G. Everi st Inc . Ft Lupton Sand and Gravel ecru n Receipts - 31612025 A P el SENDER: ISO L' PLE E PI'S SEC TION Co l piiete items is 2r and a ■! Print your name. and address on the reverse so that we can return tie cad to you. is Attach thls card to the back of the r iaiilpiiecel or on the from if s,p ace permkts4 1. Article Addressed Darrell:8c 8 Neva NA Beason 920S CountyRoad 25. Fort Lupton, CO 80621-m9308 9690 9402 55 9274 2184 88 2, Adele Number trianster from :sent° I 7'®2.2 3330 0001 6705 5776 n • COMPLETE THIS SECTIO,N ON DELIVER? An D, If YES. eater deCvery address beim IO No tNre CI Agent ivreiltar ® Addressee Delivery LC"Link /trait( - ay address afferent from item di? I 3. Service Typo is Adutt Striatum CO Add Serabse Restictied �ewety CertiiiedMS® In Cart:tled Restricted 00liveri ri Collect €C Dibieri O Meted Rail C� hymned rill F'tesbae cf Deliver, ( ` PS: Forte 3811 a July 2015 PSN 7530412-000-9053 }� ',flier Lill II .. a SENDER: COAL °'LETS THIS SECTION ■ Complete items 1 r 22 and 3. ■ Print your riame and address on the ruse so that we can return the card to you, ■ Attach this card to the back € f the ma ilpieceo or on the front If space permits it Artiotei Addrearied to: Bruin & Renee. Strange 1233,5 County Road 14 1/2 Fort Lupton. CO 80621-m8814 �Illlf�lnl�ll�lllll INI IIIIIIIIII IH 9590 9402 5569 9274 2184 71 :0 artirilA Not? Mransfer Morn sate MO L 7022 3330 0001 6705 57:83 PS Form 3811, July 2015 P N 7530492-000•9053 eceivend by O twit Flail Expense D Feted Mail Restricted 0 Return Receipt for Mete © Signature Canknimit 'N' O Signature Confictratkiel Restricted Delver/ Domestic Rehm Receipt O Arra Ci Avidressee C. Dated Delivery is deliver/ address different f Item Yes If YES. eater delivery address ow: No 0 Adult Signature Li Adult Signalise Restricted Delivery a' Cer illied Male ID Ctilified Mail Restricted Davey c gal eci on Delivery C Corti Restricted Defiitety E hewed Mail Insixiird Moil Restricted Delivery -- rover $ 001 LI Priority Meil E.Nsit O Registered Mir O Re 'stored MS Restricted Merchanclise CI Sionehire Corthrmation Flestritied every MQ$11Q Return' Receipt LG.. Everi st Inc. M-1999-120 Ft Lupton Sand and Gravel Retrun Receipts - 3/612025 USPS Tracking® For site: Fart Lupton Mailing: DRMS Ex -0 - Public Notice letter Sent to: Gary Strange & Larry Torres Tracking Number: 70223330000167055790 Copy Add to Informed Delivery (htips;i!i1'Ymedl!Nylals.icomJ) Latest Update F,es Remove Your package i I'I arrive laver than expected, but is still on its moray. It is currentlyin transit to the next facd ty, Get More Out of US -PS Tracking: USPS 'Track ng Plus Moving Through Network in Tran s it to next- Facility, Arriving Late December 24 4, 20:4 • Departed USPS Regional Facility DENVEIR CO DISTRIBUTION CENTER December 2'0p x024, 9,40 am arrived at USPS Regional Facility DENVER CO DISTRIBUTION CENTER December 19t 2024 , 8:60 pm Defied Post Office COMMERCE CITY, CO 8002.2 D e er'b r let 2024i 003 pm USPS in possession of terms COMMERCE CITY,: CO 8002 December 181 2024 N 1.19 pm MI Q. 0 http s.., N'tog Is. U . crt mi " i'rackeon firnriAcht ?t Ref=Full gtI_ci 264text287 hketels=70 33; 01167O557 %2C �. Ft Lupton Sand and Gravel Retrun Receipts - 3/612025 USPS Tracking® For site Fort Lupton Mailing- DRMS Ex -0 - Public Notice letter Sent to: City of Aurora Tracking Number: 7022.3330000167055806 Copy Add to Informed Die1ivery +fi'rformedlriuls.conAJ) Latest Update F.Qs Remove Your Item was delivered to an individual at the address at :41 am on December 23‘ 2024 in AURORAI, O 8001 Get More Out of USPS Tracking: USPS Tracking P Iueg Delivered [fie I ivere d t Lift oath Individual AURORA, CO 80012 December 2'3p 2024, 9;41 am In Transit to text Facility December 22, 2024 Departed Post Office COMMERCE CITY, CO 80022 December 18t 202444:03 p USE'S in possession of item COMMERCE ant: CO 80022 ec mbier slat 202441:20 pm Hide Tracking. Histelly What Do USPS 'Tracking Sta.tuses Mean? thrtps://faq,uspsticornisfarticleNiiheremisarny-package) lati inoo s.us .comig► t Tray+ceonfirmActio' RtuI1pa&tvCit 1287 bell=70 33; 0167 %-2C 1 ,,' 2 L.G. Everi st Inc. Ft Lupton Sand and Gravel M-1999-120 ecru n Receipts - 31612025 0 s J SENDER: COMPLETE THIS SECTION s complete l Items 1, 2, and a IN Prim your name and address on tie reverse so that we can return the card to youL Attach this card to the back of the mailpiece, or on thefront tispace irts, Arius 6 ji5E,L. • LaDuc, Trickle L n e Texas. i=i 10100 Danas Street Henderson. CO 80640-8491 II I IIIIN Ohl III I Ill BI I t IIUI�II II I I II NI 9590 9402 5569 9274 21&334 k Aw Signature civeld by (Prin Na (. ts delivery address dirge t tan 1?Q Yes If YES', enter delivery acklr below; ❑ No ent. C, Date. or livery 1,2 -tiff ill Semite() Type El Mit Signalure 0 itgliAt Sigrialtire Restricted it Codified Wile 0 Oollect on Deliver/ ® whet on Qthlikry Restricted Delivery CI IIsmail Mil 0 I� MIA Wiled Delivery rr 2rigidiAi 7022 3 PS Form 381 ii JuillarEtra J 1 ■ complete items it 2t and • Print y -our name and address on the reverse so that we can return the card to you. Attache this card to the back of the mailplece or on the front- if space , 1, Article Addr wed to; 12331 County Rid 141/ Fort Lupton, GO 80621-8814 i IIIlIIIHi�IIUII i111�INIIINIIII 9590 9402 5569 9274 2183 41 le 7122 3330 01301 67 51 58.20 PS Faun 3 Si t July 20115 7530-020000•9053 CI Priority Exprestie El Registered Maim tl Flegisileted Mea Restricted 0 Rem ReceirA for Metchanaui '0 Signature ContirrnatIcorm Q i tur'e frrnaxii. m Restricted Dewy Domestic Return Receipt C 0MPLE TE T 'S SEC TI Y N ON DEL d VER Y a1m �s r D, s d' s differen rorn lie 1? Q Yes 46 WYE'S, enter delivery addsess +w: Nol Service Type CI Mutt Slor-atimn ID Adult Slinature Restated Delivery gCarew Mall d Pail® � .ed r'e�LI Dolled nn Delivery D Coiled on belivery ReStricte+l ever)/ ID insured Moil 01 loaned Mall Fiesbioted Deliver" onwssecji Qi Priorely Mail Evrene El Ro9i$tGei~ed LI Registered Mai Restricted' ICleavery O pRetu,��A�,i��telpl ,� for I r l erche R is 0 Signature ikrmati cans d 1•14 tyro CentIrrnatim M;latirial i .Dowry Dynastic Return Fleck Ova LiG„ Everi st Inc, Ft Lupton Sand a n d Gravel etrun Receipts - 31612025 a SENDER: COMPLETE' THIS SECTION a ierompiete items 1 y, 2. and 3. * Print your name and address on! the reverse sc that we can return cared to you, NI Attach this card to the back of the rnallpietel ` on the front it space permits., Article Marmara', r coo/di albt" Neel5C7ES Fart Lu ton o City of 130 S INIcKinl y Avenue Fort Lupton, CO 80621-1343 9590 9402 5569 9274 2183 27 asipLETE THIS SECTION ON DELI EHY Signat re Pagent 1:3 Addressee .. c heed by, (Fi +) C, Odie of Dom° -- ", eie? �' e - '' - D. Is delivery ad different from item 11 Yes If YES, , eater deli+►' address bow No Article NUS (Transfer troop sante 7722 3330 0001 6705 5837 a, service Type o Atli Signature a 4 mature Regaled Delhiery ^!F led WIRD D Catitied Mali Beritricied Delivery Pect on Delivery dCokicti on Delivery llesirkted r''xt ery 0 Inured M imurred Mall 'Restricted Deem otter $50Cri PS Form .3811i July 2ols F'SN 7530-02-000-9053 jai ! 714:arrare.•a:sv - SENDER: COMPLETE THIS SECT/GPI Complete items t 20 e. ■Print' your name and address on the reverse so that we can return the card to you. M Attach this card to the back of the mailpiecel or on the front 1f space permits, Article Asignessedt ; South Platte Valley Historical Society PO BOX 633 Fort Lupton, CO 802 1-3 illIIIIII Au�IIIQ�IIII�IIN II �1111�1 9590 9102 8279 3.094 9 864 67 ed (Printed istrarri 1C Ore Dr Is delriery address afferent from Hem 1? ® Yes If YES enter devery address belcethr ( 1 a Priority Mai txpieisse Gl Registered iviailmt ® isberedNA1t Areltritted ® Brehm Receipt Fix M1tsri 0 SignsilUre CortiliTharago 0 Signature tttttttacini Restricted Deli:'r',I+' Domestic Return 'Receipt 2. Arl:Cie Number rflonsfer tram spice Isbell 7'022 3330. 0001 6705 5844 3, Service,TIT'? ci ilk Signature Miquit signature Restricted' 0c7trtry fitted Mai* Q dried Mail Restricted Morel O on Delivery ij Caen on Delivery Restricted Dellvery laved Mail O Wend Mall Restrtted Delver/ - r ! 0 amity tiotirlit 'ExpreTe4 • Reolstered lair)" �7Registered Mall Restaffed Inetvery Q Signature ConfirrestioTtIm O Signature Conritmation Restricted very PS F'ou'r'Y'I 3811t, July 2020 PSitil 7530,-02-0004053 Dorncr; ReWrni Receipt 04 0 La Everi st Inc, Ft Lupton Sand and Grave etrun Receipts - 31612025 M Complete a kerns 10 2M and a Print wur name and ntss on the reverse so that we return the card to you, In Attach this Cad taw the tack of the mailp ffeceil or on the front it space omits, 1. Mid* Addressed to: • dose G Rubalcava 81Mariver Ruiz °11490 County Road 14 1/2 j Ford Lupton" CO 80621•w8813 111111111111111111 9590 9402 8.279 30.94 9864 50 Anicie Number ea trier (rte service label) ' 7022 3330 0001 67 5 5851 4 PS Fora. 381.1 i, l 2020 PSN 753042-0004053 SENDER; COMPLETE THIS S'ECTIO'N I Complete items 1 hZ, and 3. IN Print your name awl address on the reverse so That we. can return the card to you. Attach this card' to the back of the man:Oleo% or on the trot, it space permits. Article Addressed to;, eolk, Signature ROC:O ed by �, rect Vie) El Agent Addonsto C. Date of Delivery D. Is delivery address different freen Yegb If YES, enter delivery address low: NO � ct Type o Adult ai tutu /aid Stomata. Restricted Doirrycry p. Certified Ifu+�ai� Cc-Alf►Jed fiesirieled Delivery 0 CoVect on Deli O Camel on [elite ilestikbed Delivery 0 Wired Mail 0 Insured Mall Red Delivery feint SAM Lupton Real Estate West LaLI p and el lsons Greenhouses of Colorado Lime P. a 'Box 208 Fort Upton, CO so621 HUM Priofily Mad Exp CI' Registered ilia CI' Pe9isteretl Mail Refsitr ct Delivery G S1giature Comlionationim 0 Stimature Conlimrislion ResiKicled iDefletry Domestic Return Receipt. C OJ'4 PI. ETf THIS S EC TioN av DEL I V R Y A SEA -titi E O ,gent Addressee _ . Fleceivod byplam, Date of ate. Dr is dalively address different from itemYes e YES. enter dew address below 'D NO 3, Service Type Q Adult Stratum, • geerritiTieded t7l(9590 ' ' mall �l lb -Pitted �ry 71:122 3330 00011 V? 5 5868 PS Forr-t=t .3811m duly 2020 PSN ,7530,02-00M053 T it on wry Restrkted Delivery 0 insures Mail 0© ax Mail .I �f� cl very 0 Pasty mail' El Floe Wet r7cJyy., ed 0 Signalise Cariltrnwitirse 0 Stratum Cottriirrnallon Rasitittecf Delivety Domestic Return Reoelpt O.11 LiG„ Everi st Inc, Ft Lupton Sand and Gravel ecru n Receipts - 31612025 " .. n F r41 Ar". its r.�r/*far f9 C� v frt. pa • Complete items 1F 20 arid Sp • Print your nom+ and address on the verse so that we can return the card to you, Attach this card to the beck of the mallpie 9, or on the front if space permits, !!rBice .Addressedto: Anna MI Verbeek " 11400 County Road 14 1/2 Fort Lupton, CO- 80621-8813 11111111111111111111IIIIIIIIIIII 9590 9402 8279 3094 9,864 36 4 2, Ariide Number pawky- from service /abet, '7022 3330 0001 6705 5875 110 P$ Foie 3811 July 2020 PsN 7.530R02-000-9053 SEEN D ER o COMPLEriE THIS SECTION Complete items 1. 2p and 34. Print your crime and add on the reverse. so that vitae can, return the to youp • Attach tills card to the back of the iril ailp iecep or on the front if space permits, Article Addressed' to: Todd & Bonn.is .IM4 .filler 11420 Cotrly Road 14 1/2 Pert Lupton, CO 80621-8813 1111111111111111111'11111101 9590 9402 8279 3094 9864 29 2s Article Mother Monster service /abet) - l7022 3330 E1001 6705 5882 PS Form 381i • Jury2o2to PSN 7-000.0 5,3 an milled by (",rut ed N r Ip. 1�! Agent Addressee Cr Dale of Delivery atTaZi D. ery :tom diffevent horn them 1? Ye& :If YES; enter delivery address Vim; El t40 -.. t3. ServiceType - Q Advil Signature O Athitt signaivre Restricted Delivery Ceified per` ' "a Certified Mair RestriCbedDeliver 0 CcIle.ct on Onlivrry C Collect Oat DOWN? Restricted Del:Mery I Insured Mail Omer ir_50_ CI Insured Mail Restficted Delivery nature iftivfaiti Pritrity Mail Epierste liegisiered Registered MO 'Restricted Delivery Eggitature Cenfi►rmationaw Sighrratura Crinnfrnation Revricbe d Deivery -a- Domestic Rehann Receipt CI Agent Addrcosco , Dade of Deliver i D. Is d Y ad A SS different griOrn Item 1? Yes If YESi enter delivery address b w: EI No .3„ service o Adutt Signature © Adult Signature Rel4r ted' Ciamoy truiscr loia Codified IV -all Restricted Cerivety Cl iCokect on Deli . 0 Collect on Delivery tDelivery ❑ Insured Mai 0 insured KS Restricted Delivery tr SSW. O irk s xpressq9 O Registered Mail,iA O Registered tae Restricted Dekkiery O cure t?"' 0' Signature Confirmation Restricted m Ivory Domestic Fretvrn ,I'lfreceipt P O-1 Everist Inc. Ft Lupton Sand and Gravel Retru n Receipts - 31612025 ■ Complete iteinaio Zip and 3. ® Print your narne and add s on the Mira' so that we can rattan the cord k) • Attach this card to the back of the mailplece, or on the front if space permits, 1 ale ,ire to: CY6 6. OkLilt Quaid Negrey Living Trust 0638 County Road .2 1/2 Fort Lupton! CO 80621-8817 111,11111M1311011111111, 9590 94D2 8278 3094 9864 12 Article Number (Transfer tiliom senate kiwi) r 7'022 33.30 00101 67ns X89'9 R .Form 381 July 2020 P N 7530,02,0004K3 K 3 4 f a._ ,d7 rang ti -L . SENDER: CaticIPLETE THIS SECTION MI cep Kenna1 2i and 3, N' Print your name and address on the re so that we can return the card to you. IAttu this card to the back of than niallpktce, _ or on the front if spa00 _ penvW it Article Mdressed lo: Francs R Funakosititiving Trust 675.7 County Road 23 112 For Lupton, CO 80621-8816 Illllllilll1111111111HI fNl IIIl3INBII1I 9590 9402 5569 9274 2164 57 2.: Avt.icie Nu r .ster tram service lab41 ,22 3330 00,01 67115 59.05 Ps Form 3811, Jury 2015. N x'530-02400 90 53 COMPLETE TH/S SECTION aril DELIVERY B. Received by (Printed Petarw) r .. 00" CAgent gsee 0, Date of Delivery nf 0, Is deivery at dre different from ikert'ti 1? 0 Yes If YES,, enter delivery address below:: cji No 3, Service Type U' Adult Signayure CI Adult Signature Restricted Delivery rfiified M Certified Mil FlastrieritAt Deltircry O Collett an Didvor, Q, CaMect on fiery IR#sfri ed Clary CI leisured Mall O Wired Mal Ftestritt> Deliver/ 00) D Priority Wm rquessib O Registered 0 {stored Mail Resiritted Del very [ Signature CorklirmationvA O S rairm contierivron Restricted Delivery Domestic Return Receipi COMPLETE 7 MS SECTION CM DEL / VERY A. Sigti , a. ur Ci Agent 0 Addressee Vie) C. Date of Delivery ) "Jr er D. ! derrvery address different from, kern 1? CI ,' es Li YES. 'Fret ddivory addle&s bbl, CI No 3. Service Type - Adult Signature O Altai aig:nAtore Rostffcted Delivery Certified Winii0 Certified hull Reettbed Deli CI Collect O11 Defray O Caton on Deliverer Reetrloted Deinery O Insured Mal 1�7 ane.0 J lk�all 1Riuhr'alett Delivery _�etwe.r $500.1 O Priority Mail ExpnetvO CI Regittcred Motes Deavery Return Rem icy Morchatiatel el aignattio Corthnirtelionni D Signature Coalirmatkm Restricted Dafficif. DoMestic Return Receipt G n 0'-1 LG.. Everi st Inc, Ft Lupton Sand and Gravel ,Retrun Receipts - 31612025 r t I. r �:T SENDER: COMPLETE THIS SECTION • Complete iterns 1 D 2E and 9 I Print fur~ name and address on the mime so that we can return the card to you,, • Attach this card to the back 11) lalr the rprecel or on the front if space permit& 1. AnkleAddressed or. Ty & A1yson L Gordon 7018 County Road 23 112 Fort Lujp ton', CO 80621-8819 i 9,590 9402 5569 9.274 2184 40 ,_ Signal s. larmit,) CI Age Address C. Date of DigiVellY `2 tett a IS iAterY address different from EMI 41? 'des IfYE.. ; enter deldr>ds below: O iskii : Article Nun's Mansfer fiservice (abed 7022. 2. 333Q 0D®'l 6705 5912 3, Service Type 0 Adult Signature I ortItied f��a la Defined Ma; Restricted Delivery intumd LW! Instred Mai Reelereited —Oemor Ste► Ll Priority Meil lerjanno. O Regitleted Mato ❑ Regkfteed lei Delivery O Return RIMS f*r Merchandlee ® Caniiimation PS Form 3811, Juiy 2015 PSN 7530602-0004053 • w a .l. SENDER: COMPLETE THIS SECTION it 'complete Items 1 ! Z, and 3.. Print your name and address on the reverse t so thatlivetcan DettiM the card to y01.14 N Attach Deis card to the back of the maip+iece, or on the frorit If space pemiitt a„. ` r JOyce M j oh hson PO BOX 1092 Fort Lupton, CO 80621-1'092 1111111111011111111011111111 9590 9402 5569 9274 2184 33 a 9: Artiest, Numblyansfer f (Ante Ate - 702'2' 333D Q 01 6705 5'929 ForForrn 38113 - July 2015 PSN 7530-02-0130-9053 A, Sign, J i1 EL IReui'a ed 'Domestic Return Receipt 0 ]! Agent O_dressee i. ; F to of Delivery DI Is Slivery address different tram item 1? O Mas if YES, enter deliver address b ® 1 3, Servito Type E. Adu-4 Signature F I Adult "' i ahn Restricted Delivery ❑ Certified Mail Restricted latel ' 0 erect Oil Delivery 0 Collect co Delivery Restricted Delvery Insured Mai 0 lrkstrogi Mai Ties ricied Deli ter pCI Priority Mal�� MM" --4 h lJ Rogts l'I� M "—i ID Registered Mall R:esliimted Dewey L:1 Return Receipt for Muse Signature Confirmation's', O Conformation Reeltined Delivery Domestic Return Receipt , 0 014 Li a Everi st Inc, Ft Lupton Send a n d Gravel M-1999-120 ecru n Receipts - 31612025 SENDER; COMPLETE THIS SFC.l lOl'!F • Complete Kerns 1, 2, and as ■' Print your name and address on the wares so that we Gan (return the card to { it Attach this card to the hack of the mallpiece, or on the front if sp perrnitt Article AddreSSed Mr. Roger E SiJudy D Patterson PO BOX 122 Fort Lupton, CO 8062141122 ill�lfll IIV IIII III III VI 1111111 IIIIN 1� NI 9590 9402 5569 9274 2.1,84 26 rf 2, ale Number Mamma from service WO t 7022 33301 01001 6705 5 936 1 Cl erifeireer • Azidressee Cat Is delivery address different 'Tom Item 1? VI If YES. enter 'delivery address tale, El No 424 3, Service Typo O Adult Signature Adult Signature Rest itted Deliver/ Cert lied Mai1ill Gratified Moil Ftestrieted Delivery O Cam, on Ddivery LI CoIlict on Delivery Restricted Del'rrrery InsMaid 0 Insured hall Resti iited Delivery (over WC, s Ford 3811 , July 2015 PSN 75.30-0.-2-00.0-90.53 SENDER: Carli7PLETE THIS SECTION s Complete items 11. 2.1 and �r MI Print your t' anie and address on the reverse so that we can return the card to you. Attach this card to Ike hack of the mall,p►iem or on the front If space permits, Articto Ackkemed to: David Fell 11580 County Road 18 Fort Lupton, CO80621-8804 IIN UII III VII iN 111111 III IMII n �I 9590 '902 5569 9274 21.84 1 • IIMM r• ; © amity Mai! Express'', Registered MeV" ® Rep:Vend Dolman Restricted! Elterivery O Return Receipt( fad` Merchandise O Signature riiirineilir nto r Signature nfirmat Restricted Delivery Clorn slit Retvrn Receipt errt-r n, tp •t. i • tw t g ,L C"OAIP_L E TE rigri SEC TION ON DELIVERY O karat Acktressee a Date of Delivery #124 i a. is deli ress. Brent I<r7am iii 1? ID YESp enter riaiivery address bed: pNO 4 4 a i tticie Number ffrarisfer from service labe0 a Service Type, O Milt Signature O Adult Signature Restricted Deny/ rtilied a ril► Certified Mail flestricted Delivery ti Collett on Dollyery Collect on Deltvery Restricted Deliver ill insure Mill 71122 3330 0001 6705 5143 I, i1"�dDerwerY �— - - ad's Form 38110 July 2015 PSN 75-3042-000,9053 0' Priority Ovt it Express g Registered mail PA O Registered (Mail Restrkte d Delivery Merchandise CT Signature Conffrrnaticnim 0 Signature Confirmation Restricted Delivery Domestic Return Receipt O-1 LG.. Everi st Inc, Ft Lupton Sand and Gravel Retru n Receipts - 3/612025 El SEA DE COMPLETE THIS SECTION ra hl I °' 111113rr r items 1, 2. and a ▪ Print your name and addrns on the reverse so that we can return the card to you. ■ Ate this card to the back of the r1plece,. or on the, fry if space permits, 1.h ,rim addressed L ' Thomas, Dean Bomhoft 11477 County Road 1 Fort Lupton, CO 80621-8801 II I I��I IIM IIII III INI 111 III I 1 9590 9402 5569 9'74 2184 02 11 9 Ankh% P order trt817Sfef MP S:trViC0 laben r 7022 3!330 0001 6705 59150 r 4 COMPLETE THIS SECTION ON DELNERY A. Signawit 1 El Agent A{l.dreSse. IPoriSirved b! kidielioery address different from Item 1? Yee If YES" titer deliveni address lour: No 3, Service Typo !� Ada Sivature "errelled M41,9 ❑ Cortiled. Mail Restricted DeI try a Caret on Del► iCrollict on Delivery Fleatifeted Claw)! ❑ Inland ha it Inland iVail FltilekulercI Clebtiery Irykitt>r $54X* O Pacrity Expatsai O Rai�refed Molt iRestrieted Delivery ❑ Return'ReceFint riot Meese LI Signature Conli rnationlm 0 Signature C'orlittnell Restricted Dellotrary 9 S PS Form 3811 r JuEy 2015 E to 7530-02a000e9053 E! DEFI. cOJ PLETE THIS SECTIONN' In Complete 'terns 1„ artd 3r III t your name and _address on the reverse so that we can return the yard to you, Attach this card to the barb of he mailpkiece' or on the front space permits, 1, Article Addressed kg Sandra B Irk s k i & Rudolph Camarillo 11467 County Road 18 Fort Lupton, CO 80621n8801 959 9402 5569 9274 2.183 96 Domestic 'Return Receipt COMPLETE TM'S SiECTION &ill DELIVERY A.. Si -6247 a.arr. � lVfarr�j O Agent O Adder GI CI of Delvery 42 :i to delivery addres0 dint tram item 1? If YE% enter dernary address belowW 2, Article dumber irinfer from servkv kid 7'22 3330 00!01 6705 5967 3, Bemire Type Li Ada -I Signature C3 Acirit Vognatbru FIceilrnted Deli Wertiliee Mai O C rliNed Mail Fie tee Dower" O Collect On Deriireiyr ❑ Comet cm Delivery Restricted Deivery o Insured fvfiail O Insured Mail Restricted Deliver); (ter $500 - - _ • Prl city wlai Expresseg o Regtsterad Q Roves mil Restricted Dee. Cr Rata Reoalpt I�+` riAerchandia O1 Signature nfirmallus Restricted Delivery July 2015 P N 7530-024304053 Return Receipt 046 L.G. Everi st Inc . Ft Lupton Sand and Gravel ecru n Receipts - 3/612025 I X z w c g' °I I � CC aulc CIL, ,ve- m W O C lamergaiwal 111.1 ! f, elmilmrellommolSilmaam �s IMnimaliarmat immmaisismoin 0 0 1' re rgi mime o, X-.•••balirrireau , A."':- 7. J x'1:'.1 it Ertl at �a 'r41 F h r ia cti t1,! L '1� �j n 0 co (9 &I! n ti CU O 46 ;a ID C Lt ri 4* =L_ "0117M� 01 474. ngva NMfit tireal wie itimagrat risorti smarm sawn rem w it 44 g in i- 4 t< z t b WNW" O-17 Ft Lupton Sand and Gravel Retrun Receipts - 3/612025 USPS Tracking Tracking Number: 70223330000167'055974 For sae: Fort Lupton S &G Mailing; DIEM Ex -0 - Public Notice letter Sent to: Salvador Madera Copy Add to Informed [delivers (h-ftpsthrinforrneddeliveryiuspe.comn Latest Update FAes Remove Your item has been delivered to the origin& sender at :09 pm on January 13, 2O25 in HENDERSON, CO 80640, Get More out of U PS Tracking: U Tracking Nun` II Delivered Delivered, TO Original Sender H EN DERSO,N, CO 80640 January 13, 2025, :09 prn Redelivery Scheduled for Next Business Da HENDERSON. CO 80640 January 11i, 20251816 am Arrived at USPS Regional Facility DENVER CO .DISTRIBUTION CENTER J n u ar 10, X02 5, 2:54 pm ill In Transit. to New Facility January , 2025 Arrived at U S Regional Facility' COLORADO SPRINGS CO DISTRIBUTION CENTER January 81202541:24 pm httpis.itaods. usps.cornig rrac Co it cttt bets I Er702233300001PA74# 1113 Ft Lupton Sand and Gravel Retrun Receipts - 31612025 • Unclaimed/Being Returned to Sender FORT I U P'TO F GO 8062t January 20.25 2i :43 Ism Reminder to SchedUle Redelivery of your item December 26. 20:24 Notiioe Left (No Authorized Recipient Available FORT LU P'T'A N r C:O80621 December 21. 202411:29 pm Departed USE'S Regional Facility DENVER DISTRIBUTION CETER December 2:0.20241 9:40 am " Arrived at U BPS Regional Facitityf DENVER CO DISTRIBUTION CENTER Decembet 19,, 2024:. 8:49 pm • Departed Poet Office COMMERCE CITY. CO 80022 December 18. 2024.4:0 pm LISPS in. possession of item COMMERCE E IT t CO .80022 December 2024.11:38 pm Hide Tracking History What Do LISPS, Tracking StatusesMean? (https://faq.u.spsecomisfarticleNithere-is-,mtpackage) Text & Email Updates USE'S Tracking Plus.® Product Information See Less ". -19 LiG„ Everi st Inc, Ft Lupton Sand a n d Gravel ecru n Receipts - 3/612O25 A I v SENDER: COMPLETE THIS siEcnotoi Comp!ete items la 2" and 3. Print your name and address on the reverse to that we can return the card to you, • Attach this card to the back of the mak:li r or on the 'fit If space penha, - - 1. ,article Addressed to: 1 Laurie & Rene Salinas 6320 County Road 23 Fort Lupton, CO 80621a8922 1111111111111111111111111111 .9590 9402 5569 9274 2183 7 COMPLETE THIS SECTION ON DELIVERY Y s. ved meted Name), El"'alert 0 Addressee Day of Dicatory Dc, Is &1ively address ditlepent from item lt? Yes If 'DES, enter delivery adldress beim 0 No 2r Arida Number Mamie from stoke IMO I. 7022 3330 0001 6705 5981 3, Service Type 0 mule (Signotute It SiQnetuire F lotetbe i Dewey �rtlad Filet Certified Mall Restricted Dellvery D Celled 014 CletiverY O Pliotity Mal Expres • BegIstered 0 Registered Mall Flestricted Delivery O Reim) Receipt icy` Murchwellan Signerbare CorifIrmoilionto Gaud on RestidSignature Confirmation '0 Insured Ma C Imured I R�� ' liGfied! Ditiverti I PS Form 38111. July 2015 F?SN 153O-O2.O0O-9053 8 Complete items1 N 20 and 3; ■ Print your narne and address on the reverse so that stove can rectum the card to you. Attach! t -tiffs card to the back of the nialipleoey or on the front if spy pants. Article Addressed to: Robert 'pit < Mary Ann Kerr 11-104 County Brad 20 Fort Lupton, 80621-9302 notneetic RetUrn Receipt Ipoif. is delivery dress di ant Thorn item 1? 0 Yes or YES, enter deI volt' address below: Q No Sant 1:1 Addressee Date of Dainty /I I' /eve/ 3� SerAce Type 0 Adult Signature Adol Signatures Restricted Wry rtiked Melia 9590 0 5569 9274 18 65gets:A(60d Mall Rnir ted �.Di Collect Oil Deficit, 0 Corlett € n Delivery Fleshed Deem Inswed ® Irraured Mail Restricted Doty over IiIInIINI III I�IIIII� ull�l be Number (Transfer from service kiben 7 022 3333 DB01 6705 5 9'9 8 0 Priority Mail Express. Flegisloyd i� Rinaleted MaiiReglitted Delivery CI Isla Accept: krt Merchandise II Signature CcerfirtnalSanna Signature Reetrizted Delivery PS Form 3811 r LIB it' 0 C 5 pstii m u.02.000-,9051 Domestic Iolurn :Receipit O-20 LiG„ Everi st Inc, Ft Lupton Sand and Grave ecru n Receipts - 3161202 • SENDER: comae re THIS S.EC170A1 �! Commie items 1, Land 3, Print your name and adds on the reverse so that we can return the card to you. Attach this card to the back of the mailpl e• or on the front if space permits. 1,. Article Addressed to: Daly Ann Uhl Hs 8607 County Road 25 Fort Lupton, CO 80621-9305 0 9402 8279 3094 9864 0 2, Article Number firransfer from service Alba x"022 3330 0001 6705 6018 PS Form 3811, July 2020 PSN X530-02.-0001-9+53 SENDER: COMPLETE' THIS SECTION M Complete items 11 21 r 3. I' Print your name and address on the reverse so that we cart return the Gird to yak • Attach this cad to the back of the maitipiecep or on the front if space permits. 1. Anicie Ad's to: COMPLE !MS SECTION ON DELIVERY D. 1e delivery ads diffarant from ( Pies If YES, eater delivery dress below: 0 No Aurvice Type • Alan :inataro • Adult S- Toluca Restricted revery liDteetitied Me CI Certified Mail Resirl�,:ted Detively O coned on Delivery O wile! Sri Deirory Restricted aeNyer y 0 Insured Mel O'Ymmured MO Restriebed Delivery (over ssau Stacy Bje rke & Kenneth E Curby 8721 County Road 25 d`ol`t Lupton, 0 806219305 111111114111101111011111 2. Articie Number Mane& from sante labOP. 7022 333O O001 6205 6025 PS Forrn38110-r, July 2020 PSN 7530,02-4000.4.9053 A. Signature F-'u"rorily Mail Expres 0 Registered ?shill" o ist ei Mail Reelacted Delivery 0 Signature Coalliniellibri Restricted. Syr, . Domestic Return Receipt r r iL Webs" r B. od by 13 Agent 01 Addre; CDate of Dekely D, IS 'ctelive �, , � tin= ken 1? � l YiESI o r deer ety add below: Cl No rye y 3, Ste Tip@ CI CI Advil Signature O Signature Restated Delver,' O #Adult Certified Met Hiatt Maill Restricted fiery I O Collect co [NaO LI Wed on Delivery Restrided Delivery Insured Mall 0 Insured kkall lei NW?" ( $500) . Priority Mail DOM. Regina d Retered Mai lewd Detmcgry Signature frarr�t 'l Restricted y Domestic Sebum Receipt O-21 La Everi st Inc, Ft Lupton Sand and Grave etrun Receipts - 31612025 ,E - a b SENDER COMPLETE THIS SECTION • Comgdete items 1„ a, and 3, • Print your name and address on the reverse SO that we earl return the card to you. ■ Attach this card to the back of the mailp ecel, or on the front ff space pernits,. Mete mall toc Barron-Melen dez Real Estate 14751 E County Lire Road Longmont mont 8.0504-8031 11111111 9590 9402 8279 3094 9864 81 lirrowsr- El Addressee � u-1 Cr. Cite of Del 404 D4 IS dellver iti ddrt n !different from item 1? NI Yes If YES, enter delivery address belays); No 2drunk Egli arnha aria fig fenen gAntietk hadij 7022 330 0001 67 5 6032 3 See Ty. t Certified :Flail Restrtolodb 0 Coiled an Deliver/ 0 hatred Mail 0 !inured mail Restikted! Delivery oar.$ - - - erg Iry Mail Eft tlegistared Mann' Registered Mai Restricted • Delivery D Sigr�G¢re Corsli rttialliortirm o Signature CoutigurnatIon Restkitedtielvery PS Fo 3:811 p July 2020 M 7530-024000-1053 a f conriplete dares 1 1 and O Print your name and' add Oil the lamer, so that we can return the c .to you, ■ Attach this card to the back of the mailpiccoj or on the shirt if space mite. Ardor-, Addretsed to; Parker Family Land Company IL 12.877 County Road 18 Fort L upto o CO .80621-88.05 NINIIIIIlII�IlIliill�IlI�IVIn�IIIHI 9590 9402 8279 3094 9864 98 a Article liumberivs ;ogle, " 022 3330 00O1 6705 60,49 PS Fcrm 3811 } July 2! Don4estic Return Receipt J COMM_ ErE Tats sECTOorkr Env DELIVERY mil ed Nat'ae, CT Agent mciress Ci. Dais of Deliver I it* Ps. IS delivery address different. from item 1?- Li Nits YE , ervter acklreSS below: l 3, SerVice Typr? 0 Ague Signetuno O Adult ritjrtrilve Restri4ted Dewy jetGill.01-0. C CertSfied Mail RestriCted Deiveay El wed on Delivery i)]C0iluct dot! Dstweryfi RISITiCted Delivery IC Insured MS Insured MOP Fintritled Deliwiry (over OM CI PWcrerity Mail Exposss& CI Reallstered Mar '" ed Mal Pstrkte# 0 Wit= CorifenatiNlini CI &ran Confirmation at FltetIrlefal Derryetry ANINIMIr Domestic Return Receipt a Ot22 L.G. Everi st Inc. Ft Lupton Sand and Gravel ecru n Receipts - 31612025 i O a z att. , Ellsresmemenromins ur-^4 0 UJ D o ; nn < �k, 00, woo re C) ire z 0ba arifes- u rn rn S2324K502376v08 rz I 0 c' co o a% it._ c co 0 '4t qtr r. t CA 4) i i " „ r rip i-..I a s' 21,ffi re firre • JU tip I �C ift;J� LJ� : ,, 4 Wit) tit Ft PL t1 OM &A in . W IYI rnmas sitSms fwr v•-�.. 'x'11 02 = 0) 4Ya. rkt � 41.11 Tsik ARSE g a +•-•Weell 1r rr 'Sa -ice± stp- ii kr—sa [-m ai a� rd ID At Pet cr rit O� PJ 0 irD �I r i J Li) f°p°1 �P t7P rNit u 0 011 4 O-23 Li a Everi st Inc. M a 199.9-1 0 Ft Lupton Sand a n d Gravel Retrun Receipts - 3/612025 USPS Tracking For site: Fort Lupton Si DMEx-0 - Public Notice letter Sint to: IMP" Kauffman (ROW) Tracking Number: 70223330000167056056 Copy Aid to Irdormed Delivery i'rttp"s;!/infarmed l !Nyt#acomJ) Latest Update Your harry has been delivered to the origirnad sender at 1:00 pm on D O 80640. e F,es Remove ber 30, 2024 in H E DEAF SON, Get More Out of US -PS `tracking: USPS Tracking ng Nu II Delivered Delivered, To Original Sender HEI' DEFISON„ CO 806-40 December 30,, 2024, 1:0.0 pm i Redelivery Scheduled for Next Business Da HENDERSON, CO 80640 December 28, 2024. Ell Tern Arrived at USPS Regional Facility DENVER CO DISTRIBUTION CENTER December 27.2024* 12L18 pm In Transit to Next Facility December 26, 20.24 Arrived at U S Regional Facility' COLORADO PRIN ' DISTRIBUTION CENTER December 24.2024, 7:28 pm CD CT h ttps.saodls. usprs.corrvgoiTrackCon iirrrtAction1 Ref=furl geatLca Zlte t26 = . htis=70 3330 0167 2C t r3 LG.. Everist Inc. Ma1999-120 Ft Lupton Sand and Gravel Retrun Receipts - 31612025 Forward Expired DENVER CO 80202 December 21, 2024., 11:35 am II Departed MPS, Regional Facility DFNVER CO DISTRIBUTION ENTER December '0+ 2024, x'_40 am Arrived at USPS Regional Facility DENVER GO DISTRIBUTION CENTER December 19, 2024, 8:49 prn Departed Post ► ffice COMMERCE IT'S GO 8022 December 18. 2024,, 4:03 pm USE'S in possession of item COMMERCE ono,. CO 80022' December 186 2024i 1:46 prn Hide Tracking History Do USPS Tracking Statuses Mean? thltsilifaq.usptcomistarticIe/Wheresisamy-package) ext & Email ■ ail Updates USPS Tracking Plus Product information See Less Track Another Package Enter tracking or aarntsde numbers x_25 La Everi st Inc, Ft Lupton Sand and Grave Retrun Receipts - 3/612025 N n n SENDER: co/1'01SM MIS SECVON I Complete items 1; ' and 37 • Prtnt your name anti address orti the reverse so that we can return the card tO yOUI.. ▪ Attach this card to the back of the mail,piece, or on i he front Ff space pests. 1.. Article Addressed n Petro Operating o mpany, hL 9033 E -Eas terra. Place, Suite 112 entenniali GO 80112-2105 1111111111111110111111111 590 9402 8.279 3094 9865, 11 COMPLETE TR'S SECTION ON DELIVERY Agent Ackhreeasthe B. Received by (Printed ,fie) C. Daps of DelIvery Q. Is deliumry addrass different from item 1? 1:1 Yes 7 Artie:la Mt iTrartskty from service lobe x,0;223 3330 0 001 6705 6 013 PS P 3811 ; Jury 2020 ISSN 7 i 0a ■ complete Items r and is Print your name and add on the I Ir' so that we can return the card to i Attach this card to the back of the maaptiette. GT on tile front If X300 permits. 1 o rle Addressed to P' A Weld Courity,, cio Public Works 1150 0 Street reerey, CO 80632 IIII�INN�NNINi�I�IV91piYNll 9590 9402 8279 3094 9865 28 Article tikirater figranskrineOnl service Midi 7022 3330 0001 6705 6070 PS Form 3811 P. July 2020 IISN 753E -02i - 3F SegeTye, D Signalure ct AMA Ste' :Restricted Devery 00erfified Mailt CI' Certified kW? Restricted Delivery i� Collett on Delivery O Collect Oil Delivery Res"rioted Delivery Restricted Delivery O Insured LaW Insurtid Wig lReslrieled Delivery __cover $503 - - QI Priority Mall Expressile Registered. bail Ic irlstered Aeel kel O Sp rdirmailonto O &gnature Confirrnatican Domestic RiOturn Receipt CarfrIPLETE' THIS SieCTION ON DELIVERY Lagovel Agent 0 Addressee 9. Rece it i Warne) . Abe of Delively 02it D. is derrvery _ addre;m. clif cren I. from Item1? El' sities If YES, enter delivery address tsSiOW: ID No y n Jr f s 3,, Service Ty Pe 0 CI must signatures C rzi Adult Sigrvnturo Resil:rieltd DerArillrY O 0 Certified hiss RestrIciod Delivery El O °NNW en Delivery CI CI Collect on Delikiwy Restricted DoRstely D insured.lei oveF .150) - anst„ Priefiry Mail Expreats Begislered Marra' Delivery"r Signature Confirmation Reatrlcled Delivery ' 0ome-slic Return Receipt • Ot26 La Everi st Inc, Ft Lupton Sand and Gravel ecru n Receipts - 31612025 4 SEINDEFI: COMPLETE THIS SECTION A Complete items 1 P 21, and 3. • !dint your name and address on the Iwo rse that return the card to your • attach this card to the back of the mallpieCep or on the front iff spy permits,. 14 Articie AtkInn,sed to: Colorado interstate Gas Comp ROW- %% em Pipelines P.O. Box 1087 Colorado Springs. CO lIIII�IIIIIInNaINN�III�NV IIVININ 9590 9402 9279 3094 9885 35 Artie Number (Transkei from san'to :ab>citg 7022' x333 0001 6705 6087 1 PS Form 3811t july 2020 ISSN 7530, 02,4004053 SENDER: COMPLETE THIS SECTION Complete items 1 2i and 3. in Print your name and address on the reverse so that we can return the cand to you., • Attu this card to the back of the maliplece, or on the front If space ;pets. Midis( Addressed to: United Power IOW , Box 9.29 1 551 E. 160th Ave Brighton, CO 80601-8519 11111111311111 11111111111 9590 94028279 3094 9865 4 2, Arlide Number (Transier AVM sonic° la ! `x,022 3330 0001 6705 6094 ID'S Form 381 y 2.020 PSN 7530.02-000a9053 COMPLETE THIS SECTION ON DELIVERY ERY A, Signature Fa- _ I� Dr Is delivers? address diffef' nt from lbw at? JD Yes If YES, eras; delivery address below: O No RaePt,red �l 3., Barbee Type Mutt SIgnatkire tit suture Flee/kW Detkery artifice" Mane CrertY:ed l tl RestriCRe!WY C4� Collect on Derivirne 0 Cogecl on Deliarery Peatlad! DNiimry D Inured lielairecl i1 Fieetrtted der' foyer SE4.0), Retelved by n.t: ad . Mtn.� aete of Delvely Priority Mail Ewe 0 Reglsitted IctiaV neseMed rlry 0 VnErr nicri i D Signature Cnttmation Pita3WOKE Deliver/ Domestic Return Receipt , Dale of Deli �a Dr IS delivery address differ from item 1? L'" es- Ixf YES, meter delivery a,ddrbelow: No 3,. Sento Type C &tult &ame a* 0 molt Signature Resittried Deli Certified Mall@ QCerlifitd Mail Regritted Delivery 0 edged cn Dom ID peel on Dativeri Rest eted Delively 1' LI Wired Mail 13 leisured Mail Restricted Delivery favar $5Cal, Q PriorityMtn n Expo 0 Ilogls �,,I�� rm D Resist Mail Rostfict�ed� CI Signature iirmat in TM 0 &graniteCortrinrrialion Reelactecl Delivery Domestic Saturn Receipt 4 0-7 L.G. Everi st Inc. Ft Lupton Sand and Gravel ecru n Receipts - 31612 !25. he h rr. 1 1p T 14-14. Y mil. . r SENDER: COMPLETE THIS SECTION N:'t U 1 Print your name and address on the reverse 80 that vit, can return the cif to you. ■ Attach this card to the back of maid or on the front if Space parnilts. Article Addressed tix I Xt.& Energy (PSCO) at ROW 1500 6th Ave. Greeley, CO 80631 PUN 111111 1111 I I MI�N 9590 9'402 ,x.279 3094 9e65 59 2, Article Number friars r from serer l) 7022 3330 0001 .6705 610O PS Form 3 11,, ,buy 2020 IPSO 7530-024,000-9053 - COOP aPL Tf THIS Bettie! ON DELIVERY Pia .Signithve nieliggenit Addressee • B- Flecelyed by rnrimed Name) C. Day lir Di is delivery address ctiftwent from item 1? O Yas YES. enter delivery address below: No ' 3, Soviet Type ' O Adult Skitnature Signature Resiricied Delivery Corlifred Ii CI lltmd Malt Reslfitrrct Coselivery 0 collect on Dowry 0 WSW on wry Fletriclad Delivery 0 Insured Mal a 'attired Men Rastritcliol Cr very Wier $50 ,J. . 0 Priority Ittithl 0 ReGatiored I' 0 L}R�, -. � Mail BOSUNS t:J.�: U 0 Signalune ConlinnatkNI PAntricted Delivery Doric Return Receipt 0-8 L.G. Everi st Inc. r Ft Lupton Sand and Grave ecru n Receipts - 31612025 1 1 i nee vitt 04 O o s r a 1 , n ` y�;t 4 � ;' � cc i , 1 1 of a. at 2 re Lur ILL. O O ez ct s r sue; ■ 0 CMI Co J r dm, > WI co 411) O1 rM kri d.� O 'Vittc, fs ��yee' s7ie�! per' • • oft ih IICY! y„e t� ce�ItE430 X on CI hi f `1 cultic Nd ,14a r�; • 1.41 A:11'1:'' t ;`� '11i ■< ,y Y R u r'Y t!' r �e'L a ILF-3 r- �4 0 ila Y t ka. N . Arm 041 rat . dub 4t "ea . tilde Tram ,L• M& � tan EMI Vin' r4 C2I' CO .lb L tri SSW r� Q� .___ ‘1.2Le ir+RF Saila CY �i rwrub RY�1 _°SEM! ,.••• iow 29 Ft Lupton Sand a n d Gravel Retrun Receipts - 3/612025 USPS Tracking® TrackingNumber: For site: Fort Lupton Mailing: DRMS Ex -0 - Public Notice letter Sent to: CenturyLink (ROB. 70223330000167056117 'dopy Add to Informed De ( J//informe livenw xom Latest Update Your harry has been delivered to the origirnold sender at 1:00 pm on D O 80640. e Fs Remove ber 30, 2024 in H E DERSON, Get More Out of US -PS Tracking: U Tracking Nu II Delivered Delivered, To Original Sender HEI' DERSON„ CO 806-40 December 30,, 2024, 1:0.0 pm • Redelivery Scheduled for Next Business Da HENDERSON, CO 80640 December 2'8, 2024. Ell Tern Arrived at USPS Regional Facility DENVER CO DISTRIBUTION CENTER December 27.2024* 12:18 pm In Transit to Next Facility December 26, 20.24 Arrived at U S Regional Facility' COLORADO SPRINGS CO DISTRIBUTION CENTER December .24, 202414:41 pm Ct. Cr hilpsiitlools.usps.comigoarativeonfitnriActtoneratRetatull gerStLc=2&text Rabels=7'0 33 + G 167O611 %2C 111'3 LG.. Everi st Inc, M a l999-1 0 Ft Lupton Sand and Gravel Retrun Receipts - 31612025 3,4 r 3:11 PIM 0 Forward rd Expired DENVER, CO 020 December 21, 2024,1 :4 ara Departed USPS Regional Facility DENVER CO DiSTRIBUTION CENTER December 0, 20241 , 40 a • Arrived at USPS Regional DENVER CO DISTRIBUTION CENTER December 19, 2024, 8.50 prn Departed Post Office COMMERCE CITY„ CO 80022 December 18# 2024, 4:03 pm USPS in possession of item COlvilstilEIRCE CITY, CO 80022 December 18 2024, 1:5.3 pm Hide Tracking History u5P$.comit USPS TreeIcing. Results What 00 '4J PS Ti ac icing Statuses Mean? s //forgo! p sor sia ticleniThre-it-mtp ge) Text. & Email Updates USE'S Tracking Plus Product Information Track pother Package See Less dos‘ V Enter tracking or gods numbers L.G. Everi st Inc . Ft Lupton Sand and Gravel ecru n Receipts - 31612025 _f 1 144 s sz- s: :�ir —as T� 0 tr ru Ns CI 1.tessiegOle w !j 1 cis �I 0 c ra 3 I 0 4 —s 0 ik� :tc PVC Or, CI trier lu CC 2: — N to lent tU 144 %tom e tit t ar) erg +f?4i T sips Yl) ems �el, �-��` any saa ""� h szT gb IMP qtames 5� r� qt 7si.ts Sae.' �a �_y Sara seep •MS WIry� .50 Wrr� it tg u PtiD" °. {4) X10 B Ft Lupton Sand a n dI Gravel Retru n Receipts - 31612025 LISPS Tracking® For site: Fort Lupton S SoG Sent to Lupton Bottom Ditch(ROW) Tracking Number: 70223330000167056124 Copy Add to Informed De Wen, e thttps://inform wide I iv er fir. usp . co Latest Update Rs Remove Your item has been delivered to the o rr gun l sender :at :09; pm on January 13. 2025 in H E N D E RSO , CO 80640. Get More Out of USPS Tracking IMPS Tracking Plus" elivered D ilvered o To Original Sender ENDERSON, CO 80640 Janua 13, 202502:09 p See All Tracking iiistory ''hat- Do LISPS TrackingStatuses Mean? thtips://faci*uocomis ' idder ls—myepackage) hex# & Email Updates Nye USPS Tracking Muse Product Information See Less l LiG„ Everi st Inc, Ft Lupton Sand a n d Gravel ecru n Receipts - 3/6/2025. SENDER: COMPLETE mils SECT/ON ■ Complete Items 1i.2. grid 34 • Print your riarne and address on the reitse so that. we can return the card to you. I Attach this cam to the back of the mil piece,, or on the front if space permits, 1 Article tSSed Meadow island Ditch in o Ritchie Pyeaft 13895 County Road.21 Piattevillel, CO 80651 ... �IIIIIII Ipl11lgl��91111�lI� IIII III 950 9402 8279 3094 985 80 Article Writhe 7016 1370 PS Form 3811, July 2020 P9117-AQ-024.0004053 .•11,,.71 EN E.)E C OMPL ATE THIS SEC TO N ■ Complete [terns 1 Z and 3,. • PIS your name and address on the reverse so that we can return the card to you, Attach this mod to the back of the mailpiecei or on, the front if space permits. 1. Article Acklresse0 to; Platte Valley Irrigation Company 3400 W. 16th St reelesep CO 80634- 4a, 9,590 9402 8279 094 9865 97 s , ,, te rYa 1 • Amt In Addressee triter"' D. is delivery add di#f t from item 1? Ye II YES, enter &limy address below: CI ND ti a„ Seroice Type D t#rrli Si mire pitiAdult Siiiitistute Restricted Delimegy "Centred Ma& D ertIted Mali Resiritted D Collect on Dewar/ O Insured Mali 0 Insured Mail Restricted' ver/ C Pry Mait Cuwrote C Registered Mairm 0 B red Mal Restricted C SOW= ConfirmetiOeu C Strain Confirmation Restilicted Delivery A, Signature Domestic Return Receipt. a Agent Ades Narnteol IC. Date GI ivory cs„, k van (WaNatais Cit Is, delivery address ortferenttrom item O Yes II `'SE'S, enter delivery addres,s below: No 24 Article Number itranster from service )WO :7016 1370 0001 0668 7191 3. &nice Type Aciiii Signature Acki4 Signature Fie -Witted Ce.;leery Ceriiried Mall® rilried Mall Restricted fir. 0 Collect on Delivery D Collect on r tricted pry a Insured Mall . 0 Insured Me Reci1r'ieit Lverg El Priority Mai Expretsvilli E Registered Man' Regicitand Restitiecil 0 Delivery Signature Conlirmartion," 0 signature confirmation Restrkled Ctiolivery PS Form 38111 July .2020 PSN 7530-024100-9053 Domestic Return Receipt (]-34 LiG Everist Inc, Ft Lupton Sand and Gravel ecru n Receipts - 3/6/2025. e SENDER: COMPLETE THIS SECTION Is complete items 1. .2t, end 3. • Print your name and address on the reverse so that we can return the card to yol. ® Attach this card to the back or the maflpiecep or on itve front if space permits le Article dressed to; Level 3. Communications 1025 E ldorado Blvd Broom%Idi CO 8002.1 IiIIII�IINI�IIIl�IMVI��III uilil�l� 9590 9402 8279 3094 9866 03 COMPLETE THIS SEC not) ON DELIVERY An Signature Bo Received b (Plinied Nam) er 044.04, na°'u n Agent Addressee r IS delivery retddrErn different from its i? `es, If YES,, enter delivery ailit en bestow: No J 2, Miele Number Manske, tram mice lam 7016 1370 Oen 0668 7207 &mite 700 C alt algriaire Q Adlit Signaiwe Fievrietet otftery cnrtified hA� O Certified Mai Flethicted Devon, wile ► tin Delivery lkact on Dellve_ny Restrttod palmy l Iriturtd Mill Irreured Mail Resirlelled DeffIvery —( s5o0 O Prorily Express* 0 Registered manta El Flegistered maa Restricted Delivery D Sicralure Ocinfarnationtlit O Sigil3lure CorilVermatial Resirictod Delivery PS FOB 3811r my 2020 PSN 7530-0 -0 - 3 Domestic Return Rereeipt O-35 Comment responses follow for The Division of Water resources, Michael Bachofer, and Platte Valley Irrigation Company (PVIC) and are responded to in the order presented in their documents Division of Water Resources - received 12/16/24 L.G. Everist, Inc., understands the Division requirements for a gravel mine use of water. They maintain, update and renew their Substitute Water Supply Plan as required and provide makeup water for losses associate with dewatering, gravel production, dust control and surface evaporation. Prior to opening the amendment area a new well permit will be filed and obtained from the Divi- sion of Water resources. A well abandonment report will be filed for any monitoring wells no longer needed. Prior to release the Deep Lake area will be covered by an approved augmentation plan. Michael Bachofer - Received 1/7/25 We thank the Division and Mr Bachofer for clarifying that his comment letter was not an objection and offer the following responses in the order he presented them in this letter of Janu- ary 1, 2025. 1. I can confirm that he is right the mine does extend above WCR 18 approximately 3900 feet (approx 3/4 of a mile) . 2. As far as I know there is no limit on amendments to MLRB Regular 112 Permits issued by the Division of Reclamation, Mining and Safety. They are life of the mine reclamation permits and each amendment must comply with the Mined Land Reclamation Act of 1973 as amended and the Rules and Regula- tions in affect at the time of the amendment. It is my understanding that each amendment is reviewed based on the application as filed and only on the specific information for that mine. 3. Ground water monitoring data has been supplied with each Annual Report starting in 2013 when it was first required. There have been no instances where the mitigation points have been exceeded either low or high and the ground water level have remained seasonally stable for the last 12 years 3a. The baseline data is already collected and used in the modeling. In addition, a Ground Water Monitoring Plan was filed with this application and the first 4 of 5 quarters of water quality data has been collected. A ground water study for the area surrounding the amend- ment area will be supplied with the adequacy response. 3b. LGE has not installed a "36 inch diameter casing" for any neighbor nor are they aware of any wells being "dried up" around the Ft. Lupton Sand and Gravel mine as a result of the mine operation L.G. Everist, Inc. April 3, 2025 Ragsdale Reservoirs AM -01 3.b.i. I'm, not sure what is meant by this comment. There is nothing associated with the mine that restricts ground- water from flowing under WCR 18. 4. Nothing at the mine permanently increases the ground eleva- t ion on the mine site. The surface area around each reser- voir is at the pre -mining elevation or a little lower as a result of final grading. As it typical at all mines the flood water carrying capacity of the mine site is greater t hen pre -mining condition elevations due to the below his- t oric grade areas in each reservoir, Even if a reservoir is full of water there is a minimum of 3 feet freeboard between t he water level and the ground surface. Also, ground water elevations have little effect on flooding as the infiltra- t ion rates are so slow that unless the surface water sets for a few days on the ground to become saturated will it increase ground water levels. I am not aware of any proper- t ies where raised groundwater levels due to mining have caused an adjacent property to flood. I know of one case where a property owner claimed that, but all investigating agencies concluded that it was a result of the property owner building in the floodplain . Map Exhibit C shows the current surface elevation for the amendment area, Map Exhibit F show the proposed surface elevations when reclamation is complete. Platte Valley Irrigation Company (PVIC) - received 1/29/24 L.G. Everist, Inc has worked with PVIC and Northern to complete a structure agreement to protect the Outlet Ditch along the south side of the Northwest Area. We will provide a copy of the signed agreements to the DRMS once we receive them. L.G. Everist, Inc. April 3, 2025 Ragsdale Reservoirs AM -01 Exhibit D MINING PLAN Existing Conditions. The methods described and approved in the original mining and reclamation plans for the Fort Lupton Sand and Gravel Mine (FL G) 1999 permit, and the 2012 amendment applications will ✓ emain unchanged unless discussed in this text. The Mining Plan described in the 2004 amendment will continue be used with the o nly change being the direction of mining. The ether change is t hat mining will continue to the north into the newly added areas before moving to the southern end of the permit area. The future intent is to eventually remove the southern area from this permit into a new application that is being prepared. Map Exhibits c -current conditions, c -1 -Mining Plan, -2 -Struc- t ures and F -Reclamation Plan have been provided in this packet. In the 2012 amendment, LGE combined the Fort Lupton Sand and Gravel Mine (M.-1999-120) with the Lupton Meadows Reservoir (M- 2002-104) and added 7 parcels north, south and west of the exist- ing mines. From that time until 2023 the reining Phases in the middle of the permit area have been reined and reclaimed. The area t hat has been released has created a 2 -part mine as shown on the maps. The two (2) new areas to the permit boundary will increase t he permit area by approximately 202.26 acres mat. EXHIBIT -CURRENT ONDITION MAP shows the area being added to the permit and will ✓ eflect any changes to the Mining and Reclamation Plan in the e xisting area. There is very little change to the south area reclamation plan for the existing area except some of the oil and gas facilities have been removed which will allow for an expan- sion of some of the future reservoirs shapes. Nineteen of the twenty mined areas shown on the maps will be slurry wall lined and developed as a series of water storage ✓ eservoirs ranging from 10.26 to 70.00 acres ±. The exceptions are the Deep Lake Phase that will be reclaimed as a pond and the southern end of the Sandstead Phase that will be backfilled with fines 2 feet above ground water and revegetated. The north end of t he sandstead Phase may become a lined reservoir. TABLED -1 - MINING TIMETABLE can Page 9 is a list of the raining phases that will be ✓ eferred to in the following text. This timetable has been updated to reflect changes to existing Phases. EXHIBIT B - VICINITY MAP shows the parcels that will be added while the Mining and Recla- mation Plan Maps show how the site will be developed. The total number of phases added to the Fort Lupton Sand Gravel Mine is four and the new area will add approximately 7-15 years to the life to the mine. It is estimated by adding the new area, along with remaining reserves, that the life of the mine will be from 15 to 25 more years. This life span is subject to t luctuation depending on market conditions. The current bond for Ft Lupton S&G is $2,002,400.00. The bonds include surety for 20,134 feet of slurry wall and construc- t ion of 16,650 feet of bank sloping. At this time the applicant has a contract with the city of Aurora to develop 5 water storage ✓ eservoirs on the northern parcels of the property. This in- cludes 256.59 acres of the existing permit area., south of Weld L. G_ Eve rist, Inc. ICI -1999-129 Ft. Lupton Sand and Gravel Revised -April', 2024 1 of 14 MINING PLAN EXHIBIT D taDhIT) County Road 18. The Sandstead Phase, the new north areas as well as the southern area, will be marketed by L.G. Everist, Inc, as t hey ar developed. .The areas being added have been used primarily as agricul— tural land; The Northwest Phase is broken into 3 use areas, farm yard with a house, wetland/'creek area and agricultural produc- tion . The house will be removed prior to mining. Mining will t ake place on the yard and agricultural area in this Phase. The Northeast Phases are mostly grass land with 2 _irrigation ditches crossing the site and a small farm yard near the northwest cor- ner. LGF will. maintain 50 foot setbacks along the diagonal ditch corridor that .has the Meadow Island #1 and the east lateral of the Lupton Bottoms Ditch. If practical, the north/south leg of t he Lupton Bottoms ditch will be moved to the east side of North- e ast Phase #3 so it can be combined with Northeast Phase #2 as show in option B. The applicant will bond the mended property in phases, and wishes to retain the option to seal each reservoir with either a slurry wall or a compacted liner, until just prior to bonding t hat particular phase. At the current time, slurry walls have been constructed around the active mining areas and the reservoir slopes are built by backfilling and grading or are in the process of being completed, TABLE D -1 -PAINING TIMETABLE has a current list of all certified liners or lined areas being tested, t any given time, mining and reclamation may be occurring in one or more bonded phases to accommodate blending of materials and relocation of the processing plant and settling ponds. There will be times when reclamation is being completed in one phase while mining begins in another phase. Mining will progress from the existing permit area into the Northeast Phases then move to t he Northwest Phase leaving the Ft Lupton Test Phase as the last area to be mined. The arrows on the EXHIBIT C -1 -MINING PLAN MAP show h ow mining will progress through the mine ,area at this time. The o rder of mining in the south area will start on the west side and mine to the east jumping from Phase to Phase. The last area to be mined will be the future Plant site area., see Exhibit c-1 - ning Flan Map. Optional Mining and Reclamation Plans. Due to the constantly expanding and changing development n ature of the oil and gas and other utility operations in this area, L.G. Everist is submitting these optional Mining and Recla- mation Plans with this amendment to guarantee the flexibility to make changes to mining areas and reservoir shapes throughout the life of the mine. During the current run of mining and reclama- t ion we have seen many changes to the oil and Gas (O) facilities t hat are reflected on the current version of the maps and mining areas. We continue to stay abreast of, and in contact with, the o il and gas and utility companies about future structure and easementchanges, including plans to relocate some of their f acilities, plans to remove some of the older wells and facili- ties, and plans for oil and gas companies to add new structures as their permitting allows. L.G. Everist, Inc. M-1999-120 Ft, Lupton Sand and Gravel Revised -April, 2024 of 14 MINING PLAN EXHIBIT D {corsrn For example, between 2012 and 2024 many of the ells and facilities on the south area have been removed and the reservoir areas adjusted to show those changes. Many additional changes are expected in the future similar to this example. As mining progresses through the mine and into a new area it may be to our advantage - or we may be rewired by law to allow o il and gas companies or ditch companies to exercise their rights to revise the shapes of the reservoirs due to changes to their facilities, gaslines, wells or drilling pads or ditches. These changes may affect reservoir shapes, combine or split reservoirs, add or subtract oil and gas operations areas, gas lines, ease- ments, etc. Therefore, we are presenting these optional plans to cover t he possibilities with the understanding that the mining and ✓ eclamation methods will remain unchanged, but the configurations and areas of the mined and reclaimed areas may change. Optional Mining Plan. pption A - The mining areas shown on the large .reap on EXHIBIT -1 MINING PLAN MAP is option A. This option shows the most conser- vative (and current) mining plan and it assumes no further changes to the location of ditches, oil and gas wells, gas lines o r facilities before mining ends. Option 8 - The smaller reap inset in the upper corner is Option B and is a more optimistic plan showing removal or reloca- t ion of numerous wells, gaslines and facilities to allow removal o f more gravel and increase the amount of water storage on the site. For Option B, the South Area remains as originally planned in 2012 but the new north area may have the ditch moved between Northeast Phases #2 and #3 to create one large reservoir. Mining Methods overview The working face will be reined near vertical to maximize ✓ emoval of material from the mine. At the widest point, the longest working face will be approximately 1,700 feet long. If mining ended prematurely, this slope will be reclaimed using a cut/fill sloping method instead of backf i 11 ing . As mining reaches a setback limit, backfilling will commence within 3 to 6 months maximum so as to leave a :1 slope along the mine exterior, oil and gas facilities and the ditches. No more than 2,000 linear feet of side slope highwall area will need backfi11ing at any -one- t ime. This can be done because we plan to start backfill sloping whenever a new area is stripped so the material only has to be t andled once. The mining setbacks will vary from 15 to 27.E feet from the permit boundaries, structures and river as allowed by each use agreement of geotechnical analysis for said. structures. No reining will be done in the setback areas but they may be disturbed as mining and reclamation progresses thru a phase. For example, around oil/gas wells we will maintain an eighty ( 0) foot radius around each well head when reining, but leave a 150 foot radius when reclamation is complete EXHIBIT -1 - MlltilING PLAN MAP shows how t his will look. L. G_ Eve rist, Inc. ICI -1999-129 Ft. Lupton sand and Gravel Revised -April', 2024 3of14 MINING PLAN EXHIBIT D (corn) Around the rest of the mine, the setback line will be to the outer edge of the slurry wall or the top of the excavation limits. The temporary topsoil stockpiles placed within the setbacks will also limit noise and visual impacts to off site areas. In some cases, the setbacks will be used as a place for reads to access t he mine exterior, ditches and access for the oil and gas f acili- t ies. The setback areas will be reclaimed if disturbed. The following information is a recap of the methods currently u sed at the mine and will continue to be used as raining progresses t hrough the areas added by this amendment. This mine will be operated as a dry -mine. Slurry walls will be constructed to the. Division of water Resources specifications around the perimeter of e ach additional mine area prior to commencement of reining in the n ew phases. This isolates each mining area from the surrounding groundwater table and allows for dry -mining of each mine area. However, if a slurry wall is not feasible, the Applicant will utilize a compacted liner to seal the reservoir areas for the end u se as water storage. Design of the liner will fallow the Divi- sion of hater Resources Guidelines also. Slurry wall design documents were submitted and deemed adequate to the Division in 1999. Slurry galls installed using this design have been con- structed successfully on the 5 lined areas currently complete {and t he 6 already released from the permit). Additional monitoring wells have been installed along the western, eastern, and northern sides of the new areas in the amendment area. Ground water monitoring, and ground water quality t esting plans are included in EXHIBIT -WATER for the amendment areas Prior to mining moving into those areas just north of wCR 14.5, the Plant Site will be moved to the Parker #4 Phase in the southern area, adjacent to the access road that now serves the agricultural areas. Mining operations within each new phase area will include t opsail and overburden stripping, and excavation of dewatering t renches, and settling ponds Raw materials will be excavated with excavators, front-end loaders, scrapers andior bulldozers. As areas are cleared and stripped, previously mined slopes will ✓ eceive backfill material to establish the permanent design side slopes. A conveyor is used to transport the raw material from the areas north of WCR 18 to the Plant Site in the existing mine. Explosives will not be used at this operation. The reservoir access roads will be planed in the 25 foot wide setback between the slurry wall and the top of the slope into the ✓ eservoir. The disturbed areas from the setback line to the water line or top of bank armoring, will be left as a gravel surface instead of being recoiled and seeded. Adequate amounts of the stripped topsoil and overburden will be stockpiled for later use in reclamation in the areas that will be seeded. Topsoil and overburden stripped from subsequent mine areas may be placed directly on the seed bed in previous mine areas so it only has to be handled once and the disturbed areas will be concurrently ✓ eclaimed. The exact location of topsoil and overburden piles are L. G_ Eve rist, Inc. ICI -1999-129 Ft. Lupton Sand and Gravel Revised -April', 2024 4 of 14 MINING PLAN EXHIBIT D (CONT) unknown at this time, so we have shown the approximate location on EXHIBIT Cal - MINE PLAN MAPS • Mining within each phase will begin once topsail and overbur- den has been removed from that phase area. Excavated materials (pit run) will be removed via front-end loaders, or excavators and may be loaded onto a field conveyor and transported back to the processing plant, or loaded into off -road haul trucks for trans- port to the plant site. Mined slopes will ranee from near verti- cal to 0.5:1, or as required by the slope stability Analysis and S etback Agreements ( see EXHIBITS - STRUCTURES from. the 2004 submittal (included in this packet). As soon as mining limits have been reached in one phase area, reclamation of the pit edges within that phase area will begin. This will allow for concurrent backf illing of the pit perimeter with previously stripped overburden and/or material stripped from t he next phase area to be mined. Access roads built during slurry wall construction and mining will be left as access roads around t he reservoirs or for access to oil and gas wells on the site. Slurry galls have been installed around Swingle Forth, Swingle South, Ft. Lupton West, Parker-Panowicz and the Blue Ribbon Phases. Testing is complete and certified for all but Blue Ribbon and Swingle South. A slurry wall is planned for the small lake on the north end of Sandstead. We anticipate slurry wall construction will begin soon after permit approval on the North- east Phases. River setback and Bank armoring The only place the south Platte River is within 400 feet of t he mining area is along the east sides of Northeast Phases #1 & in the amendment area and along the east side for the Parker #4 P hase in the south area. Along these stretches the slurry wall will be installed at least 200 feet from the edge of the river bank. Along the South Platte River in Northeast Phases 1 and 3, mining will tape place within 250 feet of the river bank and the bank will be rebuilt so the top of the slope into the reservoir area will be 300 feet from the top of the river bank. In the P arker #4 Phase the mining limit will be 70 feet west of the Lupton Bottoms Ditch and the bank will be rebuilt so the tap of t he slope into the reservoir area will be 250 feet from the tap of t he river bank. This will be done by backfilling from the 1/211:1v mining face to the top -of -slope (Tos) line using shale and other quality -tested compactible material from the floor of the mined area. On the working face of non river side banks no more than 1,700 feet of ;.:1 cut/fill sloping and 2,000 feet of 1/2:1 backfill sloping in any one phase will be needed and no more than 2000 feet will need armoring. Armoring will be done, using the technique, and materials described in the BAND ARMORING PLAN in the APPENDIX of t his application packet. Water Diversions and Impoundments The entire site will be graded in phases to direct storm water runoff towards interior ditches and dewatering systems. A L. G_ Eve rist, Inc. ICI -1999-129 Ft. Lupton Sand and Gravel Revised -April', 2024 5of14 MINING PLAN EXHIBIT D (CONTI' CDPS permit for the existing mine operations is in place from the Colorado Department of Public Health and Environment (CDPHE) for the current dewatering operations. This permit will be modified, if necessary, to accommodate the additional parcels. As the slurry walls are installed, they will be constructed around the perimeter of each new phase prig to commencement of mining. This will seal off each individual phase area, and preventing infiltration of groundwater into the mining area. the initial groundwater quantities within each mine area are pumped out, continued dewatering will not be required except as needed basis after significant weather events once on an Description of Overburden, Deposit and Underlying Stratum Across the entire amendment area, approximately 3 feet of overburden ( including approximately 6 to 18 inches of topsoil) will be removed from the mine areas and stockpiled for plant - growth material in surface reclamation or used as backfill for the pit slopes. An average thickness of approximately 33 feet of sand ,and gravel exists across the amendment area. Mining Timetable The continuing uncertainty of economic conditions in the construction materials industry precludes an accurate forecast of demand for materials during the life of the mine. This pit will be operated year -around by L.G. Everist, Inc., weather permitting. There may be periods up to 18 months or more when the demands for material are slow and no mining will take place, creating an "intermittent operation" situation. We therefore, can only estimate the mining timetable ]used on an average year and may expect a specific year to vary widely from the average. L. G_ Eve rist, Inc. ICI -1999-129 Ft. Lupton Sand and Gravel Revised -April', 2024 6 of 14 MINING PLAN EXHIBIT D (coNT) Table D-1: Mining Phases (4-2025) ACRES TOTAL MINED SLURRYSTATUS WALL LENGTH(CERTIFIED SLURRY WALL DATE) Fort Lupton Sand and Gravel - North Area Parker-Panowicz 1-2 43.51 20.60 3,540 2/'5/14 Swingle North 1-2 42.02 31.88 5,220 11/30/22 Fort Lupton West 2-3 47.81 41.25 4,320 10/13/04 Swingle South 1/2-1 67.45 52.31 6,400 Pending Sandstead done 50.05 36.64 2,945 Proposed. Blue Ribbon done 55.55 37.77 5,675 Pending Deep Lake done 7.90 5.75 0 NA - South Area Funakoshi 1-3 42.97 27.39 4 7'70 Proposed Parer #1 1-2 43.17 22.17 4,230 Proposed Adams -Parker 2-3 72.92 43.83 11, 755 Proposed Parker #2 1-3 33.27 26.83 4,545 Proposed Parker #3 1-2 43.12 32.7'1 7,860 Proposed Parker #4 2-3 56.94 44.24 6,235 Proposed New areas Northeast #1 3-4 70.87 57.17 7',350 Proposed Northeast #2 2-3 67.00 45'.43 _ 6,880 Proposed Northeast #3 1-1 12.12 ,5.21 2,925 Proposed Northwest 1-2 5') . 33 27.47 _ "0 Proposed 'Totals 1 '_,- _' � � 805.00 558.65 L.G. Everrst, Inc. M-1999-120 Ft, Lupton Sand and Gravel Revised -April, 2024 7 of 14 Exhibit E RECLAMATION PLAN Overview Unless specifically discussed below, the methods described and approved in the original Reclamation. Plan will remain un- changed. This will remain a dry mining operation.. All of the map exhibits have been presented on 2 sheets labeled North area and South area for easier review. When referring to a map e- h ibit it is inferred that both should be reviewed. EXHIBITS -CURRENT CONDITIONSMAP shoe the current permit area and the area being adder t o the permit. The current post mining land uses are listed as developed water storage surrounded by access roads, gravel surface areas and revegetated areas. The following information males change to the reclamation around the reservoirs. The plan is to reduce the recoiling and revegetating. Instead of revegetating to the water line,, a gravel surface will be created from the mine setbacks to t he highwater line, except on bank armoring areas where no cover will be placed on the armoring. This solves a problem created by not having sufficient levels of moisture in the ground due to the water level fluctuations as the reservoirs fill and empty. gravel access road will be placed around the reservoir. Three areas will need revegetat ion, The scale house triangle in P arler- P anowic , the area south of and around the sandstead Reservoir and. Deep Lake. All other disturbed areas will have a gravel surface. More detail is provided in the following Reclamation P lan text and a typical cross section showing this is provided on t he EXHIBIT F - RECLAMATION MAP-` . .s with the currently permitted mine area, the new proper- t ies will be reclaimed as lined water storage reservoirs. Each. o f the additional properties will either be sealed with a slurry wall or clay liner. The applicant proposes to bond each phase prior to mining and to determine the type of lining prior to posting a bond for that -abase . Tease refer to TABLE E-'1 RECLAMATION TIMETABLE for information on each Phase of Reclamation. Reclamation Plan Currently, the undisturbed and amendment areas of the mine site are primarily irrigated agricultural land. The area is broken into 6 different use areas.. Please refer to the VEGETATION MAP in EXHIBITI/J- o1LSANDVE+ ETATION for the location of each area described. The current uses are, mining operations area, non - irrigated pasture; irrigated crop areas; ditch & river corridors wetland area, oil/gas operations areas and high capacity gas pipeline R0W's. , The agricultural uses will continue as mining progresses until an area is taken out of agricultural production and prepped for mining.. There is no native vegetation present on the agricultural areas because of the intensive agricultural practices that have taken place on the land. In most uses the o il/gas operations areas have little vegetation and the high pressure gasline Row's have been farmed for many years and vege- t ation corer on those areas is consistent with farmed areas. The n arrow band along Little Dry Creek/Slate Ditch and the Meadow L.G. Everist, Inc. M-1999-120 Ft, Lupton Sand and Gravel Revised -April, 2024 8 of 14 RECLAMATION PLAN EXHIBIT E (CONT) Island Lupton Bottoms ditches have been constantly disturbed by ditch maintenance leaving only the river corridor, that will not be disturbed, with vegetation that may be considered native. The t ypical vegetation descriptions that have been submitted in EXHIBITS I J- SOILS AND VEGETATION in previous permitting packets will match these agricultural uses as the crops rotate throughout the years. The EXHIBIT F -RECLAMATION PLAN MAP shows a cross section sketch of t he proposed sloping plan and reclamation activities that will surround reservoirs in this plan. Under the contract with city of Aurora for the water storage reservoirs, the applicant has to turn over to Aurora, for contin- ued development, any reservoirs that have been significantly ✓ eclaimed. It has been agreed that this condition will exist o nce a reservoir liner has been certified by the Division of Water Resources, sloped, the surround gravel surface is complete. The change to graveling the band between the setbacks and the h ighwater line (or armored areas) eliminates the concerns that during Aurora's development, any revegetated areas would be disturbed, destroying any grass planted. Where mining will take place within 400 feet of the river, t he banks will be backfilled to their final setbacks of 300 feet on the north area and 250 feet on the south area. At which point the slope into the reservoir will be backfilled and sloped. In t hese areas no more the 500 feet will need backfilling nor will it be left open for more than 12 months. Armoring will begin as soon as bank sloping is complete on each 500 ft section. In this area, approximately 2,000 feet will need 1/2:1 1 back - f illing, and will not be left open for more than 12 months. Armoring will begin as soon as bank doping is complete on each 1,000 -ft section. This will also ensure, that if minim ceases before the resource is exhausted, only a minor amount of work would have to be done to finish reclamation on the disturbed area Armoring in the Northeast Phases #1 and #3 will progress with sloping, so approximately 2,000 feet will need to be com- pleted at any time. No armoring will be done in the Farber #4 phase on the south area since there is armoring on the river bank anywhere the river is within 400 feet of the area to be mined. The BANK ARMORING PLAN is in the APPENDIX and explains haw and where the armoring will be placed. LE will be working with the Town of Et. Lupton for direc- t ions on Flood Plain development. This facility is not in an Urban Area, not near public land, or facilities where public safety is a concern so, inlet/outlet structures for private ✓ eservoirs are not needed. There are no plans to install Inlets o r cutlets for the reservoirs. Those will be the responsibility o f the reservoir developers. The following approved seed mix will be used to seed areas where reclamation calls for revegetation. This mix will place approximately 41.2 seeds per pound per sg-ft as prescribed by the NRCS planting guidelines* L. G_ Eve rist, Inc. ICI -1999-129 Ft. Lupton Sand and Gravel Revised -April', 2024 9of14 RECLAMATION PLAIN EXHIBIT E (CONT) APPROVED SEED SIT Species Lbs. PLS/Acre Western Wheatgrass (Aribba) Big Blue stern (Champ) Blue Grp (Hachita) w tchgrass (Blackwell) TOTALS 5.00 2.50 0.60 1.75 L. • CS .� The reclamation timetable shows the types and amount of land u se in each Phase when reclamation is complete. Approximately 12.2% of the area in the permit will not be disturbed by mining, e ither because it is setbacks around well facilities, gaslines Row's, along the ditches or areas too small to mine that will be kept in their natural state. As mining progresses, the perimeter slopes will be back - filled and graded at or near 3b to lv as discussed in the MINING PLAN. This will insure that when mining ceases only a minor amount of work will have to be done to finish reclamation in the disturbed area. The placement of the temporary soil stockpiles around the setback perimeter of the mined area would be there if needed. Since the area between the liner, the water line and/or top of the armoring will be a graveled.. surface area, no recoiling will be needed. The graveled surface will mean the above -water- line areas simply have to be shaped and graded. We expect to salvage sufficient topsoil to meet reclamation requirements. Of the 809.0 acres ± in: the permit area, only 42.1 acres ± or approximately 5.7% will need recoiling and reegetated and remaining above water gravel surface will cover 146.5 acres o r 18.1% of the area to be reclaimed. The remaining area will be ✓ eservoir arca, covered with water or undisturbed area. Observations at the site show that topsoil on the property has a salvageable depth of 6 to 12 inches, averaging 8 inches except in isolated locations. There appears to be more than adequate soils to meet the demand for this site. Setback areas will not be stripped, and the disturbed areas inside the setbacks will not be resoiled. Gravel surface maintenance roads will be built around each reservoir and left around each gas/oil well where no seeding or resoiling will take place. This will provide ✓ oom around each well or reservoir to service it as needed by the well or reservoir owners. Some inert fill (as defined in Colorado Department Public Health and Environment regulations) may be imported for recycling and resale or in rare cases for reclamation purposes. On -site generated inert material will be used for bank sloping, buried in bank areas around the lakes or will be recycled/sold. An inert fill Notice and Affidavit are included in. the Appendix for this mine. Existing soils in place have been capable of producing a fairy dense cover of irrigated craps and dr land grasses and should be suitable for use when revegetating the areas where seeding will be donee These areas will be returned to at least their present vegetative condition when reclamation is complete. Under normal conditions, the operator will strive for a 30 to 40 L.G. Everist, Inc. M-1999-120 Ft, Lupton Sand and Gravel Revised -April, 2024 l O of 14 RECLAMATION PLAN EXHIBIT E (CONT) percent cover rate on the revegetated areas when reclamation is complete. Under normal weather conditions, an adequate moisture re- serve will e present for establishment of the proposed seed mixture. No irrigation will be used during reclamation since the plan is to establish a vegetation cover that is not dependent on irrigation to survive Optional Reclamation Plan, we are submitting two options for final configuration of the reservoir area►.? as wi.11. pption - The reservoir configurations for Option are show an the large EXHIBIT F RECLAMATION PLAN MAP . tion B - The inset map shows the reservoir configura- tions under Option B. The methods used to reclaim the reservoirs will be the same for oth opt ions . The difference may be an increase /decrease in the volume of developed water storage and an increase/decrease in the amount of graveling and reveget at ion necessary. We do not }snow when the Mining Option B or the Reclamation Option B or some part(s) of either or both will be implemented, but we are including these optional plans to increase the flexi- bility of this permit and account for the inevitable changes when mining the site. Whenever any part(s) of the Option B plans become feasible, we will file a Technical Revision (s) to the Division to provide revised Mining and/or Declamation Map (s) that will show the changes. The Technical Revision(s) will discuss any changes needed to implement the optional changes, including a discussion on changes in disturbed areas, slurry wall lengths and ✓ evegetated areas Deep Lake Option Mining has ended in Deep Lake and it will not be limed. The area around the existing lake will be graded., shaped and ✓ evegeta.ted.. The town of Ft. Lupton will receive this property once it is reclaimed and will assume responsibility for a water augmentation plan. RECLAMATION LAMATION PERFORMANCE E STANDARDS The property will be mined in compliance with the Reclama- tion Performance Standards of Rule 6. Grading will be performed to create a final topography that is compatible with the intended final land use. The slopes will vary depending on the final use proposed in a particular area, reservoirs or grassed areas; the remainder of the area will retain its present drainage pattern. The RECLAMATION PLAN MAP shows how the area will be reclaimed. The pit will be reclaimed so that a suitable grade for drainage exists, all surface runoff will be directed into the ✓ eservoirs created by mining. Settling ponds may be silted in L.G. Everist, Inc. M-1999-120 Ft, Lupton Sand and Gravel Revised -April, 2024 l l of 14 RECLAMATION PLAN EXHIBIT E (corn) from wash water, this type of backfilling tends to firm up and stabilize during the first 18 months after being placed. All grading will be done in a manner to control erosion and t o protect areas outside the affected land from slides or ether damage. Backfilling and grading will be completed as soon as feasible after mining is completed in a given area. There are no drill or auger holes on the land. Maximum slopes will be within t he limits set forth in the Mules and Regulations of the Board and will be capable of being traversed by machinery. X11 refine will be hauled away or disposed of in a manner t hat will control unsightliness and protect the drainage system t rom pollution. There are no acid-forming or toxic materials involved in this operation. The minimal amounts of petroleum products stored at the site will be stored as prescribed b applicable laws. The storage tanks will be surrounded by a berm o r secondary containment such as storing the tank in a larger metal container adequate to retain any fluid should a tank rup- t ure. In addition, there is adequate absorbent materials on site t o contain any spills that would occur. The operator does not expect prevailing hydrologic condi- t ions to be disturbed. L.G. Everist, Inc. will comply with applicable Colorado water laws and regulations (as the operator understands them) governing injure to existing water rights in o rder to minimize any disturbance, which might occur to the prevailing hydrologic balance of the affected land and surround- ing areas and to the quality of water in surface and ground -water systems both during and after the mining operation and during ✓ eclamation. In addition, the operator expects to comply with applicable Federal and Colorado water quality laws and regula- t ions. Any water used in the operation of the processing plants and gravel pit will come from water owned by L.G. Everist, Inc. o r purchased from an outside agency suitable for that use. EXHIBIT G -1NNTER contains specific information concerning impacts and uses o f water at this mining operation. This is not a dredge facility, so there are no temporary siltation structures involved in this operation and no mining will be done within the confines of the river. If a U.S. Array Corps of Engineers Permit is required for mining in waters of the U.S., it will be obtained prior to disturbing those areas. Settling ponds will be constructed on the site to collect and ✓ ecycle water from the washing operation. There will be no earthen darns on the mined area. The mining and reclamation plans consider existing wildlife use of the site and final reclamation will enhance the ,area for continued wildlife use. However, creation and management of wildlife habitat is not a specific part of the reclamation plan. Topsoil in the area is good quality and deep enough to salvage what is needed for reclamation. When topsoil is removed t o reach the mineral deposit, it will be segregated and stock- piled. If the topsoil piles remain undisturbed for more than to days, the approved seed mix will be planted on the piles or other means will be employed to preserve the topsoil from wind ,and water erosion. This will keep it free of contaminants so that it L.G. Everist, Inc. ICI -1999-129 Ft. Lupton Sand and Gravel Revised -April', 2024 1 of 14 RECLAMATION PLAN EXHIBIT E (CONT) ✓ emains useful for sustaining vegetation when reclamation begins. The stockpiles will be located in areas where disturbances by o ngoing reining operations will be at a minimum, i.e. along set- backs on the pit perimeter. The topsoil will be handled as little as possible until it is replaced onto areas where needed for reclamation. We will take measures necessary to insure the stability of the replaced topsoil on graded slopes and ensuring t hat it is spread as evenly as possible. Fertilizer and other soil amendments will be used, only if needed, in accordance with NRCS recommendations. Reclamation will begin once enough area has been opened so t hat any reclamation completed will not be disturbed as mining progresses. This may take one or more ears depending on eco- n omic conditions and the amount of material mined. By the time mining is completed 75 to 0Q of the total mined land will be ✓ eclaimed. As alining ends in each reservoir area, only backf ill- ing, grading and shaping of the final mined slopes, bank armoring if needed, graveling the surface as needed, where needed, the proposed seed mix will be planted during the next planting season after resoiling is completed. The area will be monitored for success of reveget at ion until accepted by the Division for re- lease . If revegetation failures occur prior to release, an analysis of the site will be made and the area will be revegetated again as necessary. Reclamation Timetable The numbers presented below represent our estimate of the various area of disturbance in the mine area. They may change as t he actual mining progresses through the site. L. G_ Eve rist, Inc. ICI -1999-129 Ft. Lupton Sand and Gravel Revised -April', 2024 13of14 RECLAMATION PLAN EXI-IIBIT E (corn) Table El Reclamation Phases (3-2025. L l_IC, s• - , Years ACRES TOTAL LAKE AREA GRAVEL SURFACES RENEGE- TAT ION Ram) (DITCHES - Misc. UNDIS- TURBED AREAS ETC. Fort Lupton Sand. and Gravel -- North Area - Par er-Panowic 3-5 43.51 I 20.45 10.51 5.17 5.97 2.99 Swingle North 3-5 42.0229.53 9.16 1. 5 3.33 Fort Lupton West 3-5 47.81 41.39 6.13 _ 1.5 0.29 Pringle South 3=5 67.45 48.70 13.90 e 1 1.77 4.85 Sandstead 3-5 50.05 10.35 0.00 32..94 2.11 4.65 Blue Ribbon 3-5 55.55 37.04 10.34 1.54 8.17 ^Deep Lake 3-5 7.90 0.00 (� 3.98 0.00 � 0.30 South '3.62 Area Funakoshi 3-=-5 42.97 26.77 6.02 1.25 10.18 Farber #1 3-5 43.17 20.31 4 6.82 1.13 16.04 Adams -Barker 3-5 72.92 47.84 18.81 3.55 6.27 Parker #2 3-5 33.27 24.77 6.10 10.22 2.40 fir- Parker ,may r��( - 3 .. 3-543.12 �/y _ .._ 9.21 10.66 �/y 2.08 �/+��, w 3.25 Barker #4 3-5 56.94 43.43 9.91 1.68 3.60 New a areas 7 Northeast beast #1 �-5 ` 0 r 87 5 •26 11 • 8 1. `� / 5.73 Northeast # 2 3-5 67.00 49.45 13.44 1.84 4.11 Northeast #3 3-7 12.12 3.81 3.98 0.70 4.33 Northwest 3-5 52.33 22.44 11.13 1.56 18.76 Totals 80'9.00 512.37 148.19 42♦09 40.26 9'9.25 L.G. Evlerist, Inc. M-1999-120 Ft, Lupton Sand and Gravel Revised -April, 2024 14 of 14 Exhibit E RECLAMATION PLAN Overview Unless specifically discussed below, the methods described and approved in the original Reclamation. Plan will remain un- changed. This will remain a dry mining operation.. All of the map exhibits have been presented on 2 sheets labeled North area and South area for easier review. When referring to a map e- h ibit it is inferred that both should be reviewed. EXHIBITS -CURRENT CONDITIONSMAP shoe the current permit area and the area being adder t o the permit. The current post mining land uses are listed as developed water storage surrounded by access roads, gravel surface areas and revegetated areas. The following information males change to the reclamation around the reservoirs. The plan is to reduce the recoiling and revegetating. Instead of revegetating to the water line,, a gravel surface will be created from the mine setbacks to t he highwater line, except on bank armoring areas where no cover will be placed on the armoring. This solves a problem created by not having sufficient levels of moisture in the ground due to the water level fluctuations as the reservoirs fill and empty. gravel access road will be placed around the reservoir. Three areas will need revegetat ion, The scale house triangle in P arler- P anowic , the area south of and around the sandstead Reservoir and. Deep Lake. All other disturbed areas will have a gravel surface. More detail is provided in the following Reclamation P lan text and a typical cross section showing this is provided on t he EXHIBIT F - RECLAMATION MAP-` . .s with the currently permitted mine area, the new proper- t ies will be reclaimed as lined water storage reservoirs. Each. o f the additional properties will either be sealed with a slurry wall or clay liner. The applicant proposes to bond each phase prior to mining and to determine the type of lining prior to posting a bond for that -abase . Tease refer to TABLE E-'1 RECLAMATION TIMETABLE for information on each Phase of Reclamation. Reclamation Plan Currently, the undisturbed and amendment areas of the mine site are primarily irrigated agricultural land. The area is broken into 6 different use areas.. Please refer to the VEGETATION MAP in EXHIBITI/J- o1LSANDVE+ ETATION for the location of each area described. The current uses are, mining operations area, non - irrigated pasture; irrigated crop areas; ditch & river corridors wetland area, oil/gas operations areas and high capacity gas pipeline R0W's. , The agricultural uses will continue as mining progresses until an area is taken out of agricultural production and prepped for mining.. There is no native vegetation present on the agricultural areas because of the intensive agricultural practices that have taken place on the land. In most uses the o il/gas operations areas have little vegetation and the high pressure gasline Row's have been farmed for many years and vege- t ation corer on those areas is consistent with farmed areas. The n arrow band along Little Dry Creek/Slate Ditch and the Meadow L.G. Everist, Inc. 1M-1 990-120 of 7 Ft, Lupton Sand and Gravel Revised -April, 2024 RECLAMATION PLAN EXHIBIT E (CONT) Island Lupton Bottoms ditches have been constantly disturbed by ditch maintenance leaving only the river corridor, that will not be disturbed, with vegetation that may be considered native. The t ypical vegetation descriptions that have been submitted in EXHIBITS I - SOILS AND VEGETATION in previous permitting packets will match these agricultural uses as the crops rotate throughout the years. The EXHIBIT F -RECLAMATION PLAN MAP shows a cross section sketch of t he proposed sloping plan and reclamation activities that will surround reservoirs in this plan. Under the contract with city of Aurora for the water storage reservoirs, the applicant has to turn over to Aurora, for contin- ued development, any reservoirs that have been significantly ✓ eclaimed. It has been agreed that this condition will exist o nce a reservoir liner has been certified by the Division of Water Resources, sloped, the surround gravel surface is complete. The change to graveling the band between the setbacks and the h ighwater line (or armored areas) eliminates the concerns that during Aurora's development, any revegetated areas would be disturbed, destroying any grass planted. Where mining will take place within 400 feet of the river, t he banks will be backfilled to their final setbacks of 300 feet on the north area and 250 feet on the south area. At which point the slope into the reservoir will be backfilled and sloped. In t hese areas no more the 500 feet will need backfilling nor will it be left open for more than 12 months. Armoring will begin as soon as bank sloping is complete on each 500 ft section. In this area, approximately 2,000 feet will need 1/2:1 1 back - f illing, and will not be left open for more than 12 months. Armoring will begin as soon as bank doping is complete on each 1,000 -ft section. This will also ensure, that if minim ceases before the resource is exhausted, only a minor amount of work would have to be done to finish reclamation on the disturbed area Armoring in the Northeast Phases #1 and #3 will progress with sloping, so approximately 2,000 feet will need to be com- pleted at any time. No armoring will be done in the Farber #4 phase on the south area since there is armoring on the river bank anywhere the river is within 400 feet of the area to be mined. The BANK ARMORING PLAN is in the APPENDIX and explains haw and where the armoring will be placed. LE will be working with the Town of Et. Lupton for direc- t ions on Flood Plain development. This facility is not in an Urban Area, not near public land, or facilities where public safety is a concern so, inlet/outlet structures for private ✓ eservoirs are not needed. There are no plans to install Inlets o r cutlets for the reservoirs. Those will be the responsibility o f the reservoir developers. The following approved seed mix will be used to seed areas where reclamation calls for revegetation. This mix will place approximately 41.2 seeds per pound per sg-ft as prescribed by the NRCS planting guidelines* L. G_ Eve rist, Inc. ICI -1999-129 2 of 7 Ft. Lupton Sand and Gravel Revised -April', 2024 RECLAMATION PLAIN EXHIBIT E (CONT) APPROVED SEED SIT Species Lbs. PLS/Acre Western Wheatgrass (Aribba) Big Blue stern (Champ) Blue Grp (Hachita) w tchgrass (Blackwell) TOTALS 5.00 2.50 0.60 1.75 L. • CS .� The reclamation timetable shows the types and amount of land u se in each Phase when reclamation is complete. Approximately 12.2% of the area in the permit will not be disturbed by mining, e ither because it is setbacks around well facilities, gaslines Row's, along the ditches or areas too small to mine that will be kept in their natural state. As mining progresses, the perimeter slopes will be back - filled and graded at or near 3b to lv as discussed in the MINING PLAN. This will insure that when mining ceases only a minor amount of work will have to be done to finish reclamation in the disturbed area. The placement of the temporary soil stockpiles around the setback perimeter of the mined area would be there if needed. Since the area between the liner, the water line and/or top of the armoring will be a graveled.. surface area, no recoiling will be needed. The graveled surface will mean the above -water- line areas simply have to be shaped and graded. We expect to salvage sufficient topsoil to meet reclamation requirements. Of the 809.0 acres ± in: the permit area, only 42.1 acres ± or approximately 5.7% will need recoiling and reegetated and remaining above water gravel surface will cover 146.5 acres o r 18.1% of the area to be reclaimed. The remaining area will be ✓ eservoir arca, covered with water or undisturbed area. Observations at the site show that topsoil on the property has a salvageable depth of 6 to 12 inches, averaging 8 inches except in isolated locations. There appears to be more than adequate soils to meet the demand for this site. Setback areas will not be stripped, and the disturbed areas inside the setbacks will not be resoiled. Gravel surface maintenance roads will be built around each reservoir and left around each gas/oil well where no seeding or resoiling will take place. This will provide ✓ oom around each well or reservoir to service it as needed by the well or reservoir owners. Some inert fill (as defined in Colorado Department Public Health and Environment regulations) may be imported for recycling and resale or in rare cases for reclamation purposes. On -site generated inert material will be used for bank sloping, buried in bank areas around the lakes or will be recycled/sold. An inert fill Notice and Affidavit are included in. the Appendix for this mine. Existing soils in place have been capable of producing a fairy dense cover of irrigated craps and dr land grasses and should be suitable for use when revegetating the areas where seeding will be donee These areas will be returned to at least their present vegetative condition when reclamation is complete. Under normal conditions, the operator will strive for a 30 to 40 L.G. Everist, Inc. M-1999-120 3 of ? Ft, Lupton Sand and Gravel Revised -April, 2024 RECLAMATION PLAN EXHIBIT E (CONT) percent cover rate on the revegetated areas when reclamation is complete. Under normal weather conditions, an adequate moisture re- serve will e present for establishment of the proposed seed mixture. No irrigation will be used during reclamation since the plan is to establish a vegetation cover that is not dependent on irrigation to survive Optional Reclamation Plan, we are submitting two options for final configuration of the reservoir area►.? as well. pption - The reservoir configurations for Option are show an the large EXHIBIT F RECLAMATION PLAN MAP . tion B - The inset map shows the reservoir configura- tions under Option Be The methods used to reclaim the reservoirs will be the same for oth opt ions . The difference may be an increase /decrease in the volume of developed water storage and an increase/decrease in the amount of graveling and reveget at ion necessary. We do not }snow when the Mining Option B or the Reclamation Option B or some part(s) of either or both will be implemented, but we are including these optional plans to increase the flexi- bility of this permit and account for the inevitable changes when mining the site. Whenever any part(s) of the Option B plans become feasible, we will file a Technical Revision (s) to the Division to provide revised Mining and/or Declamation Map (s) that will show the changes. The Technical Revision(s) will discuss any changes needed to implement the optional changes, including a discussion on changes in disturbed areas, slurry wall lengths and ✓ evegetated areas Deep Lake Option Mining has ended in Deep Lake and it will not be limed. The area around the existing lake will be graded., shaped and ✓ evegetated. The town of Ft. Lupton will receive this property once it is reclaimed and will assume responsibility for a water augmentation plan. RECLAMATION LAMATION PERFORMANCE E STANDARDS The property will be mined in compliance with the Reclama- tion Performance Standards of Rule 6. Grading will be performed to create a final topography that is compatible with the intended final land use. The slopes will vary depending on the final use proposed in a particular area, reservoirs or grassed areas; the remainder of the area will retain its present drainage pattern. The RECLAMATION PLAN MAP shows how the area will be reclaimed, The pit will be reclaimed so that a suitable grade for drainage exists, all surface runoff will be directed into the ✓ eservoirs created by mining. Settling ponds may be silted in L.G. Everist, Inc. M-1999-120 4 of 7 Ft, Lupton Sand and Gravel Revised -April, 2024 RECLAMATION PLAN EXHIBIT E (corn) from wash water, this type of backfilling tends to firm up and stabilize during the first 18 months after being placed. All grading will be done in a manner to control erosion and t o protect areas outside the affected land from slides or ether damage. Backfilling and grading will be completed as soon as feasible after mining is completed in a given area. There are no drill or auger holes on the land. Maximum slopes will be within t he limits set forth in the Mules and Regulations of the Board and will be capable of being traversed by machinery. X11 refine will be hauled away or disposed of in a manner t hat will control unsightliness and protect the drainage system t rom pollution. There are no acid-forming or toxic materials involved in this operation. The minimal amounts of petroleum products stored at the site will be stored as prescribed b applicable laws. The storage tanks will be surrounded by a berm o r secondary containment such as storing the tank in a larger metal container adequate to retain any fluid should a tank rup- t ure. In addition, there is adequate absorbent materials on site t o contain any spills that would occur. The operator does not expect prevailing hydrologic condi- t ions to be disturbed. L.G. Everist, Inc. will comply with applicable Colorado water laws and regulations (as the operator understands them) governing injure to existing water rights in o rder to minimize any disturbance, which might occur to the prevailing hydrologic balance of the affected land and surround- ing areas and to the quality of water in surface and ground -water systems both during and after the mining operation and during ✓ eclamation. In addition, the operator expects to comply with applicable Federal and Colorado water quality laws and regula- t ions. Any water used in the operation of the processing plants and gravel pit will come from water owned by L.G. Everist, Inc. o r purchased from an outside agency suitable for that use. EXHIBIT G -1NNTER contains specific information concerning impacts and uses o f water at this mining operation. This is not a dredge facility, so there are no temporary siltation structures involved in this operation and no mining will be done within the confines of the river. If a U.S. Array Corps of Engineers Permit is required for mining in waters of the U.S., it will be obtained prior to disturbing those areas. Settling ponds will be constructed on the site to collect and ✓ ecycle water from the washing operation. There will be no earthen darns on the mined area. The mining and reclamation plans consider existing wildlife use of the site and final reclamation will enhance the ,area for continued wildlife use. However, creation and management of wildlife habitat is not a specific part of the reclamation plan. Topsoil in the area is good quality and deep enough to salvage what is needed for reclamation. When topsoil is removed t o reach the mineral deposit, it will be segregated and stock- piled. If the topsoil piles remain undisturbed for more than to days, the approved seed mix will be planted on the piles or other means will be employed to preserve the topsoil from wind ,and water erosion. This will keep it free of contaminants so that it L.G. Everist, Inc. ICI -1999-129 5 of 7 Ft. Lupton Sand and Gravel Revised -April', 2024 RECLAMATION PLAN EXHIBIT E (CONT) ✓ emains useful for sustaining vegetation when reclamation begins. The stockpiles will be located in areas where disturbances by o ngoing reining operations will be at a minimum, i.e. along set- backs on the pit perimeter. The topsoil will be handled as little as possible until it is replaced onto areas where needed for reclamation. We will take measures necessary to insure the stability of the replaced topsoil on graded slopes and ensuring t hat it is spread as evenly as possible. Fertilizer and other soil amendments will be used, only if needed, in accordance with NRCS recommendations. Reclamation will begin once enough area has been opened so t hat any reclamation completed will not be disturbed as mining progresses. This may take one or more ears depending on eco- n omic conditions and the amount of material mined. By the time mining is completed 75 to 0Q of the total mined land will be ✓ eclaimed. As alining ends in each reservoir area, only backf ill- ing, grading and shaping of the final mined slopes, bank armoring if needed, graveling the surface as needed, where needed, the proposed seed mix will be planted during the next planting season after resoiling is completed. The area will be monitored for success of reveget at ion until accepted by the Division for re- lease . If revegetation failures occur prior to release, an analysis of the site will be made and the area will be revegetated again as necessary. Reclamation Timetable The numbers presented below represent our estimate of the various area of disturbance in the mine area. They may change as t he actual mining progresses through the site. L. G_ Eve rist, Inc. ICI -1999-129 6 of 7 Ft. Lupton Sand and Gravel Revised -April', 2024 RECLAMATION PLAN EXI-IIBIT E (corn) Table El Reclamation Phases (3-2025. L l_IC, s• - , Years ACRES TOTAL LAKE AREA GRAVEL SURFACES RENEGE- TAT ION Ram) (DITCHES - Misc. UNDIS- TURBED AREAS ETC. Fort Lupton Sand. and Gravel -- North Area - Par er-Panowic 3-5 43.51 I 20.45 10.51 5.17 5.97 2.99 Swingle North 3-5 42.0229.53 9.16 1. 5 3.33 Fort Lupton West 3-5 47.81 41.39 6.13 _ 1.5 0.29 Pringle South 3=5 67.45 48.70 13.90 e 1 1.77 4.85 Sandstead 3-5 50.05 10.35 0.00 32..94 2.11 4.65 Blue Ribbon 3-5 55.55 37.04 10.34 1.54 8.17 ^Deep Lake 3-5 7.90 0.00 (� 3.98 0.00 � 0.30 South '3.62 Area Funakoshi 3-=-5 42.97 26.77 6.02 1.25 10.18 Farber #1 3-5 43.17 20.31 4 6.82 1.13 16.04 Adams -Barker 3-5 72.92 47.84 18.81 3.55 6.27 Parker #2 3-5 33.27 24.77 6.10 10.22 2.40 fir- Parker ,may r��( - 3 .. 3-543.12 �/y _ .._ 9.21 10.66 �/y 2.08 �/+��, w 3.25 Barker #4 3-5 56.94 43.43 9.91 1.68 3.60 New a areas 7 Northeast beast #1 �-5 ` 0 r 87 5 •26 11 • 8 1. `� / 5.73 Northeast # 2 3-5 67.00 49.45 13.44 1.84 4.11 Northeast #3 3-7 12.12 3.81 3.98 0.70 4.33 Northwest 3-5 52.33 22.44 11.13 1.56 18.76 Totals 80'9.00 512.37 148.19 42♦09 40.26 9'9.25 L.G. Evlerist, Inc. M-1999-120 7of7 Ft, Lupton Sand and Gravel Revised -April, 2024 ENGINEERING 8 Schnabel T 303.651.1468 / F 303.651.1469 600 S. Airport Road, Suite A-205 / Longmont, CO 80503 schnabel-eng.com TECHNICAL MEMORANDUM TO: Jaimie Addy DATE: November 25, 2024 COMPANY: L.G. Everist, Mountain SUBJECT: Heins Property Groundwater Model Division ADDRESS: 7321 E. 88th Ave., Suite 200, PROJECT L.G. Everist Heins Property Henderson, CO 80640 NAME/NO.: 20O26026.06 FROM: Sampson Ash, PG CC: INTRODUCTION This memorandum discusses the groundwater impact analysis at the proposed Heins Property mine site. The purpose of the analysis is to provide information related to the potential impacts to the groundwater table in the vicinity of the site. This includes mounding upgradient and shadowing downgradient of the proposed slurry walls at the site. The site is located approximately three miles north of the town of Fort Lupton, Colorado. The mine plan for the site consists of two main mining areas (North and South) divided by the Meadow Island Ditch and, when constructed, the relocated east branch of the Lupton Bottom Ditch. The property also includes a western parcel that won't be mined. Slurry walls will be constructed around the perimeter of each of the two planned cells, as shown on Figure 1. A standard offset of 200 feet from the river, and 15 feet from property lines, rights -of -way or utilities were used for the proposed slurry wall alignments. A groundwater model was constructed to evaluate the impact of the proposed slurry walls on groundwater levels. The objectives of the groundwater model are to: 1. Approximate the existing hydrogeologic conditions pre -slurry wall using available data. 2. Simulate the hydrogeologic effects of the slurry walls by predicting potential groundwater mounding upgradient of the property and shadowing downgradient. To satisfy these objectives, two steady-state groundwater models were constructed for: 1. Pre -slurry wall, or current conditions. 2. Post -slurry wall construction conditions. This modeling memorandum presents the geologic setting; a general site conceptual model of the aquifer system; the groundwater modeling software used; construction of the model; calibration of the model in terms of target residuals and mass balance; and finally, a discussion of the predictive simulations and conclusions. The groundwater modeling was conducted in general conformance with ASTM standards for groundwater modeling. L.G. Everist Heins Property Groundwater Modeling GEOLOGIC SETTING Geotech nical Investigations The general subsurface lithology at the Heins Property consists of one to two feet of overburden at the surface, underlain by alluvial sand and gravel deposits ranging between 21.5 and 45.5 feet thick, followed by weathered Laramie Formation bedrock measuring about two feet thick, and finally less weathered Laramie Formation bedrock. The bedrock consisted of claystone, shale, and fine-grained cemented sandstone which are fine-grained rock types and therefore have a low hydraulic conductivity. The total depth to bedrock for the site was estimated to vary from about 23.5 to 47.5 feet deep or elevations 4812 to 4848 feet, respectively. The groundwater depths on the property range between 0.2 to 10 feet below ground surface or between elevations 4853 to 4869 feet, and the aquifer had a saturated thickness ranging between 16 to 30 feet. Subsurface lithology data was obtained from the geotechnical investigation on the property, consisting of 26 borings, performed by Schnabel Engineering between September 23, and October 10, 2024. The information from this investigation was used to create the bedrock contours used in the groundwater model. These boring locations are shown on Figure 1. Site Conceptual Model The site conceptual model of the South Platte Alluvial Aquifer as shown in Diagram 1 below consists of two layers, the unconfined sand and gravel of the South Platte Alluvial Aquifer and the Laramie Formation. The overburden was removed from the model for simplification. Even though this material has a lower hydraulic conductivity it is insignificant in the contribution of the model. The highly conductive Alluvial Aquifer has an estimated hydraulic conductivity of 500 ft/day (0.17 cm/sec) (CDWR, 2024) and is bounded on the bottom by the fine-grained rock of the Laramie Formation. The Laramie Formation has an average hydraulic conductivity of 3.2x10-3 ft/day (1.2x10-6 cm/sec) as determined by packer testing during the geotechnical investigation. The rocks that comprise the Laramie Formation have a low hydraulic conductivity. In the model it acts as a no -flow boundary due to the orders of magnitude of difference in hydraulic conductivity between the two layers. WEST Diagram 1 — Site Conceptual Model / Edgy of Alit via uifer S`:_Juto P[attr? I. Act uLie r — ,ands 71l"d Grave l.5 Now Amu., Sturry %Naas Laramie Formation-Caaystone, Shale, and Fine Grained 'Cemented Sandstone EAST South Platte River - Project 20C26026.06 / November 25, 2024 Page 2 Schnabel Engineering L.G. Everist Heins Property Groundwater Modeling The primary sources of inflows into the alluvial aquifer are: 1. Subsurface inflow from the upgradient end of the aquifer and tributary valleys 2. Infiltration of precipitation and irrigation 3. Seepage from unlined ditches or reservoirs (depending on time of year) The primary sink or area of outflow from the alluvial aquifer is the South Platte River because it is a gaining stream. However, water outflow from the aquifer also includes: 1. Seepage into unlined reservoirs or mines 2. Seepage into unlined ditches (depending on time of year) 3. Well withdraws 4. Subsurface outflow at the downgradient end of the aquifer The model domain encompasses the South Platte River alluvial floodplain between Weld County Road 14 in the south and Weld County Road 24 in the north. The domain is set between the confluences of Big Dry Creek and Little Dry Creek with the South Platte River. The South Platte River is the primary surface discharge line for groundwater in the area and is set as the eastern boundary of the model. The western boundary is set at the extent of the Alluvial Aquifer which is correlated to Elevation 4900 feet as shown on Figure 2. The topography slopes gently down from south to north along the valley. The project area exhibits widespread aggregate mining where slurry walls and/or clay liners (impermeable walls) have been installed. These low permeability walls act as hydraulic barriers and redirect groundwater flow, creating mounding on the upgradient sides and shadows on the downgradient sides. Land use in the area consists of mining and agricultural uses. ANALYSIS APPROACH - STEADY-STATE GROUNDWATER MODELING Overview The Heins groundwater model was developed using a combination Geographic Information System (GIS) database and GIS data analysis techniques (ESRI, 2024) as well as Leapfrog geologic modeling to create model layers (Leapfrog Geo, 2024). That data was then imported into the software Groundwater Vistas Version 7.0 (Rumbaugh & Rumbaugh, 2015), a graphical user interface for MODFLOW. Groundwater Modeling Software The MODFLOW-2005 computer code was used to simulate groundwater flow by solving the 3 -dimensional groundwater flow equation using a finite -difference method where the model domain is subdivided into a grid of cells, and the hydraulic head is calculated at the centroid of each cell (Harbaugh, 2005). Groundwater flows into and out of the model via constant head and head -dependent flux boundaries. These flows are calculated in the same manner for each simulation. Pre- and post - processing of MODFLOW-2005 files were completed using Groundwater Vistas. Groundwater Vistas facilitates model construction, data analysis and data presentation. It summarizes results as contours, Project 20C26026.06 / November 25, 2024 Page 3 Schnabel Engineering L.G. Everist Heins Property Groundwater Modeling shaded contours, velocity vectors and detailed mass balance analyses. This section discusses the modeling assumptions, limitations, solution techniques, and the way that they affect the models. When analyzing the groundwater flows in the model, as implemented, MODFLOW-2005 simulates the system as an unconfined aquifer with one value of hydraulic conductivity. One limitation is that cells can go "dry" or "flood". If the calculated head is above the top of the aquifer (ground surface) at any model cell, then that cell is flooded and will be treated as if the aquifer is confined (i.e., the saturated thickness will equal the top -elevation minus the bottom -elevation). If the calculated head falls below the bottom of the aquifer, that cell is dry and will be assigned a zero value for hydraulic conductivity. The preconditioned conjugate -gradient (PCG2) solver package of MODFLOW-2005 was used to solve the groundwater flow equations for the model. This package defines the number of outer and inner solver iterations, as well as criteria for both maximum head and residual change between iterations before allowing convergence. Tolerances for the maximum change in head and flow residual between iterations were specified as 1x10-3 feet and 100 cubic feet per day (cfd), respectively. These tolerances result in a mass balance of less than 0.001%, indicting model convergence and solution accuracy. Steady-state conditions were simulated because the maximum water level rise is of principal interest and the time required to reach steady state is not of concern. Model Geometry and Spatial Discretization The model was constructed by importing shapefiles made in GIS representing aquifer parameters and boundary conditions into Groundwater Vistas. The model domain is a rectangular area 12,760 feet wide by 23,120 feet long (Figure 2). The domain was divided into a grid of cells measuring 40 feet on each side. Active cells contain values representing the following parameters: 1. The elevation of the top of the aquifer 2. The elevation of the bottom of the aquifer 3. The hydraulic conductivity of the aquifer 4. The initial groundwater head within the aquifer 5. The boundary conditions for the model Layer Construction The maximum top of the alluvial aquifer is represented by the topography of the ground surface. Topographic data used for this model input are from a 1 -meter digital elevation model (DEM) obtained from the Colorado Hazard Mapping & Risk Map Portal (CWCB, 2024). The bottom of the aquifer and model is the low permeability Laramie Formation bedrock. Therefore, the model contains an elevation map of the bedrock surface. To create this surface, bedrock elevation data was obtained from the geotechnical investigation described previously in this memo, data from previous projects done for L.G Everist in the area, and publicly available data from Colorado's Decision Support Systems (CDWR, 2024). The bedrock elevations were contoured in AutoCAD. Overall, the spatial reliability of the bedrock data is considered good and deemed appropriate for the scope of this groundwater model. Project 20C26026.06 / November 25, 2024 Page 4 Schnabel Engineering L.G. Everist Heins Property Groundwater Modeling The DEM and the resulting bedrock elevation contour map were imported into Leapfrog to create the top and bottom of the alluvial aquifer. Due to the 40x40 foot grid size used, the topographic and rock elevation data were averaged within that area resulting in some variation between model elevations and contoured ground/rock elevations. Aquifer Properties The hydraulic conductivity (K) of the alluvial aquifer used in the model was input as 500 feet per day (fpd). This value is based on average values from the Colorado's Decision Support Systems GIS map and our experience in the area. We assumed an anisotropy ratio of 0.5 (Kv/Kr), meaning that the value in the vertical direction (Kv) is half the value in the radial direction (Kr). A groundwater elevation contour map for the alluvial aquifer provided the starting heads for the finite difference solution and was used to define general head boundary values. This surface was developed using the groundwater level data collected from monitoring wells in the area. This consists of wells owned by LG Everist on -site and offsite. Boundary Conditions The boundary conditions listed below define the sources and sinks for the water budget of the model. No other recharge sources are included in the model, as precipitation is considered a negligible source within the domain and irrigation records were not reviewed. The system is assumed to be in equilibrium under pre -slurry wall conditions. The model domain is inactive outside of the defined boundary conditions. These boundaries are shown on Figure 2. Exterior Boundary Conditions The exterior or the outer boundary conditions used for the model include three general head boundaries, two no -flow boundaries, and the river boundary: General Head Boundaries 1. Subsurface inflow from the upgradient portion of the alluvial aquifer (Southern Boundary). 2. Subsurface outflow from the downgradient portion of the alluvial aquifer (Northern Boundary). 3. Subsurface inflow from the tributary valley of Little Dry Creek (Part of the Western Boundary). These edges of the aquifer were chosen to be modeled by the MQDFLQW General -Head boundary package to allow groundwater to flow into and out of the model and to permit groundwater elevations to change at the boundaries in response to aggregate mining. No -Flow Boundaries 1. The edge of the South Platte Alluvial Aquifer (Part of the Western Boundary). 2. The contact between the South Platte Alluvial Aquifer and Laramie Formation (Bottom Boundary). The base and most of the western side of the model are simulated using the no -flow boundary (inactive cells) to represent the contact between the low -conductive Laramine and the alluvial aquifer. Project 20C26026.06 / November 25, 2024 Page 5 Schnabel Engineering L.G. Everist Heins Property Groundwater Modeling River Boundary 1. The South Platte River (Eastern Boundary). The South Platte River was simulated using the MODFLOW River package, which contributes water to or releases water from the aquifer at adjacent cells as determined by the hydraulic gradient between the aquifer and the river and as a function of streambed conductance. Interior Boundary Conditions Interior boundaries or inner boundaries included 6 drains, 8 no -flow boundaries, and 11 constant head boundaries: Drains The unlined ditches and intermittent stream (Little Dry Creek) within the model were simulated using the MODFLOW Drain Package which removes water from the adjacent cells as determined by the hydraulic gradient between the aquifer and the ditches and stream as a function of drain conductance. No -Flow Boundary Aggregate mines that have installed slurry walls and/or clay slope liners around their properties were simulated using the no -flow boundary (inactive cells) as their contributions to the aquifer are negligible. Constant Head Boundaries The unlined reservoirs or ponds within the model domain were modeled using a constant head boundary as they provide a source or sink to the aquifer depending on their elevation. CALIBRATION Calibration Process Model Calibration is an iterative process of adjusting model parameters (aquifer properties) and boundary conditions to obtain a reasonable match between field measurements and model -computed values. Calibration was conducted for the steady-state model, which is assumed to represent conditions observed around the time frame between mid -September to mid -October of 2024. This time frame is from when the previously installed piezometers were measured, and the geotechnical investigation concluded. The calibration targets for the model include the measured groundwater elevations observed in 34 monitoring wells (Figure 2) measured during the month of September, and from 22 groundwater measurements taken during the geotechnical investigation described above. During calibration, refinements were made to the horizontal hydraulic conductivity and the anisotropy ratio. Model calibration acceptability is subjective, but the following general guidelines for judging calibration sufficient for this model included: • Overall calibration quality is determined through statistical comparison of model results with field measurements and observations. This model includes only water elevations. Project 20C26026.06 / November 25, 2024 Page 6 Schnabel Engineering L.G. Everist Heins Property Groundwater Modeling • The primary statistic used in gauging and reporting "best fit" was the squared error of the measured and computed groundwater elevations. • Calibration continued until the coefficient of determination (R2) between the measured and observed groundwater elevations was within 10% of 1. The goals of the predictive simulation targets are: 1. To show how field measured groundwater heads differ from those in the steady-state simulation. 2. To show how pre -slurry wall groundwater heads differ from those in the predictive simulations. Calibration Results The model is simple and homogeneous, containing heads that are well constrained by measured values for boundary conditions as well as a reasonable estimate of hydraulic conductivity. The calibration targets used for the pre -slurry wall condition steady state model illustrate that the input groundwater heads are generally within five feet of the measured values throughout the entire model. However, near the site where the mounding is expected the modeled heads are within two feet of the observed heads. In Figure 3 the groundwater elevation contours and residuals of the site -specific borings and wells are shown. Figure 4 shows the data in terms of groundwater depth below ground. In Figure 5 is the calibration plot of all borings or wells used in calibrating this model (Observed Values Vs. Modeled Values), showing the R2 value was 0.95 at the end of the calibration process. The mass balance reported by MODFLOW for the steady state pre -slurry wall model is as follows: Inflows = 536,788.00 cfd Outflows = 536,790.63 cfd Difference = - 2.63 cfd (-0.0004%) This illustrates that the initial steady state model is accurately solved. Because the pre -slurry wall groundwater table represents data from measured groundwater levels, and the mass balance is accurate, this suggests the model is sufficiently calibrated to be used for predicting water levels after construction of the slurry walls. PREDICTIVE SIMULATIONS U sing the steady state model for pre -slurry wall condition as the base model, predictive simulations were performed for groundwater mounding after the Heins slurry walls are constructed. P redicted Unmitigated Groundwater Mounding To understand the magnitude and extent of potential groundwater mounding upgradient of the Heins slurry walls, a steady state simulation including slurry walls was performed. The pre -slurry wall model was changed by inputting the Heins slurry walls as no -flow boundaries. All other aquifer parameters and boundary conditions remained unchanged. Initial heads were the model simulated heads from the pre -slurry wall steady state model. The steady state model for the post -slurry wall conditions generally produced higher groundwater elevation heads than those produced for the pre -slurry wall steady state condition. The groundwater elevations from the predictive simulation are shown in Figure 7. The difference between the pre- and post -slurry wall groundwater surfaces are the predicted mounding levels shown on Figure 8. For the predictive simulation, positive residuals are Project 20C26026.06 / November 25, 2024 Page 7 Schnabel Engineering L.G. Everist Heins Property Groundwater Modeling reported as values of groundwater mounding (warm colors) and negative values represent groundwater shadowing (cool colors). The magnitude of the maximum groundwater mounding is approximately 4 feet upgradient in the southwest and west portions of the site. The magnitude of the maximum groundwater shadowing is almost two feet, downgradient of the proposed slurry wall. The groundwater is closest to the surface (approximately four feet) in the southeast corner of the model, near the South Platte River as shown in Figure 9. CONCLUSIONS This groundwater impact analysis was performed to evaluate the mounding and shadowing effect the construction of slurry walls has on the local groundwater table. The model accurately replicated the conditions of the South Platte River alluvial aquifer based on data available from recent geotechnical investigations. Model construction was facilitated by using an extensive GIS to inventory, analyze, and present the data. The model reasonably simulated the hydrologic changes caused by construction of the slurry walls. The predictive simulation showed that the magnitude of the maximum groundwater mounding upgradient of the southern slurry wall is about four feet, and a minimum depth to groundwater of about four feet. The simulation also indicates that the maximum shadowing effect caused by the mining activities is about two feet downgradient of the proposed slurry wall. The western parcel of the Heins Property is shown to have shallow depths (high elevations) of groundwater. In this area the groundwater is already within a foot of the ground surface or above it as shown on Figure 5. Figure 8 shows that the slurry wall installation has minimal effect on the groundwater elevations. The changes in this area are negligible or within the accuracy of the model. RECOMMENDATIONS The installation of the Heins north and south slurry walls have minimal effect on the surrounding groundwater. No drain installation is recommended at this time. The site wells will be monitored approximately monthly. If the depth to groundwater, following the construction of the slurry wall(s) in any exterior well approaches three feet below ground surface, we recognize that a drain will need to be installed. LIMITATIONS The results of the groundwater modeling and conclusions drawn from them represent an approximation and are based on the best available data. Conservative assumptions were made during the calibration process so that groundwater mounding was not under -predicted. Given the unknown heterogeneity of the aquifer in the field and variations in ground surface from the topographic data used, the groundwater mounding and/or drainage mitigation may deviate from the model simulation. There is a possibility that mounding may be higher than predicted, although the conservative assumptions of this work make the deviation toward a lower mound in the field a more likely possibility. Project 20C26026.06 / November 25, 2024 Page 8 Schnabel Engineering L.G. Everist Heins Property Groundwater Modeling REFERENCES CDWR. (2024, November 19). Map Viewer. Retrieved from Colorado's Decision Support Systems: https://maps.dnrgis.state.co.us/dwr/Index.html?viewer=mapviewer CWCB. (2024, November 20). Colorado Hazard Mapping & Risk MAP Portal. Retrieved from Colorado Hazard Mapping: https://coloradohazardmapping.com/Iidarpownload ESRI. (2024, November 20). Retrieved from ArcGIS Pro: https://www.esri.com/en- us/arcgis/products/arcgis-pro/overview Harbaugh, A. W. (2005). MODFLOW-2005, The USGS Modular Ground -water Model - - the Ground - Water Flow Process. Rumbaugh, J. O., & Rumbaugh, D. O. (2015). Guide to Using Groundwater Vistas. Seequent, The Bentley Subsurface Company. (2024, November 20). Leapfrog Geo. Retrieved from https://www.seequent.com/products-solutions/leapfrog-geo/ Project 20C26026.06 / November 25, 2024 Page 9 Schnabel Engineering iv 0 200 400 600 Feet SCALE: 1 inch =500 feet Legend Boring Locations Slurry Walls South Platte River Drains Model Domain Unlined Reservoirs or Lakes 0 2024 03:40 PM Thursday, November cA Lek HEINS WEST HA -01 MPa Coal Ridge HEINS NORTH HEINS SOUTH LG EVERIST BLUE RIBBON te 4;4(b Lupton Bottom Der HEINS PROPERTY GROUNDWATER MODEL Boring Location Plan FIGURE NO. 1 DATE: 11/21/2024 I PROJECT NO.: 20O26026.06 Otongmont12020120C26026.06 Heins Property103-SE Productsl07-GISIHeins Property.aprx Thursday, November 21, 2024 03:41 PM Legend e Slurry Walls General Head Boundary Relocated Lupton Bolton Ditch West South Platte River Drain Boundary Model Domain Unlined Reservoirs and Lakes Groundwater Monitoring Points • NCC ZADEL Prr flEINS WEST Little Dry Creek • • iv -a HEINS NORTH • • HEINS SOUTH b. Is LG EUERSIT BLUE RIBBON Cosal®Ri ige FORT LLI PTO N PITS • • s ,o ,4 cv FORT LLIPTON I 0 1,000 2,000 Feet SCALE: 1 in = 1,500 feet Heins Property Groundwater Model Model Domain and Boundary Conditions JOB N0: 20C2fiO2fi.Ofi I DATE: 11/21/2024 FIGURE N0. 2 Residuals Slurry Walls General Head South Platte River Drains Model Domain co O 0 200 400 600 Feet SCALE: 1 inch = 500 feet Legend Unlined Reservoirs or Lakes Groundwater Contours 2.5 -ft Groundwater Contours 5 -ft •-0.87 4870 _0,54 NCC ZADEL PIT HEINS NORTH o9z HEINS SOUTH LG EVERIST BLUE RIBBON otes: egative numbers mean the model overestimates groundwater elevation in that location Positive number means the models under estimates the number in that location HEINS PROPERTY GROUNDWATER MODEL Steady -State Calibration Results FIGURE NO. 3 DATE: 11/21/2024 PROJECT NO.: 20C26026.06 2024 04:35 PM E O Z c0 s Notes: Warm Colors (Red ) Groundwater near or above ground 5U !face Zool Colors (Blue) Groundwater below ground surface Calibration Plot - Observed Values Vs. Modeled Values 4895 4890 4885 4880 tecee r 4875 714 vacs Tij 4870 4865 4860 4855 ••. .• + • 4 st- + toff- + t•. • •• ' +' . ••. + • ••. •• • •• • .• •• •.• •• • •• •• •• •• ••• ♦• ♦' •• ♦• .• ,�-• � -F • ••• •• •• ••• •• •• ••+ y = 0.9911x + 43.067 Rz = 0.9554 4850 _ 4850 Note: 4855 4860 4865 4870 4875 Observed Values (ft) 4880 4885 4890 4895 EaSchnabel E NG I NE E R l M r HEINS PROPERTY GROUNDWATER MODEL Calibration Plot J°B ":20C26026.06 DATE: 11/20/2024 FIGURE NO. 5 © Schnabel Engineering, LLC. 2024 All Rights Reserved Slurry Walls General Head a a Ditch West South Platte River Drains 2024 03:43 PM SCALE: 1 inch Legend Relocated Lupton Bottom 200 400 600 Feet 500 feet Model Domain Unlined Reservoirs or Lakes Groundwater Contours Predictive 2.5 ft Groundwater Contours Predictive 5 ft NCC ZADEL PIT HEINS SOUTH HEINS NORTH HEINS WEST I I LG EVERIST BLUE RIBBON 4855 HEINS PROPERTY GROUNDWATER MODEL Predictive Simulation Results 11/21/2024 FIGURE NO. 6 PROJECT NO.: 20C26026.06 2024 04:35 PM E O Z c0 s 2024 04:36 PM O Z c0 s v 0 200 400 600 Feet SCALE: 1 inch = 500 feet Legend Slurry Walls Relocated Lupton Bottom Ditch West South Platte River Drain Boundary Model Domain Unlined Reservoirs or Lakes Groundwater Below Ground Surface (ft) Value 15.8 -2.4 Water Below Groundsurface Contours ,eftt.4(r •+r HEINS WEST Notes: Warm Colors (Red ) Groundwater near or above ground 5u rface Zool Colors (Blue) Groundwater below ground surface NCC ZADEL PIT sea HEINS SOUTH HEINS NORTH LG EVERIST BLUE RIBBON asisliger or,.11mI ,Nf.•• .p...v.,.. HEINS PROPERTY GROUNDWATER MODEL Groundwater Below Ground Surface DATE: 11/21/2024 FIGURE N0. 8 PROJECT NO.: 20C26026.06 L.G. EVERIST, INC. ROCK SOUD SINCE 1876 321 E. 8811-1 AVENUE, SUITE E 20 HENDERSON, COLORADO 80640 RHONE 303-287-9606 • Fax 303-289-1348 RiER ITTEE / STRUCTURE OWNER AGREEPAENT By and Between Permittee (L G. Everist, Inc.) and Owners of Structure(s) Listed Below within 200 feet of proposed sand and gravel mine site The Colorado Division of Reclamation, Mining and Safety (DRMS), abiding by the Colorado Mined Land Reclamation (MLR) Law, requires the permit applicant/operator to agree to reimburse the owner of any permanent manamade structure(s) within 200 feet of the permitted mining area for damage done to the structure(s) as a result of the permitted operation. Permitfee: L. . Everist, Inc. shall be the permittee (applicant/operator) of the following: Site: Fort Lupton sand and Gravel, a permitted and amended sand and gravel mine, which has a reclamation plan of developed grater storage; and is located within Sections 10, 30 and 31 (Township 2N, Range 66W), and Sections 24, 25 and 36 (T 2N, R 67'x'"'), 6th Prime Meridian, Weld County, Colorado. Structure Owner listed below owns the following structure(s) listed below, which are located within 200 feet of the pe rm if ted area: Structure Owner: Tricycle Lane Texas, LLc Structure(s): slurry galls, 3 strand wire fences The permittee, L. . Everist, Inc., does hereby certify that the Structure Owner named in this Agreement shall be compensated for any damage to their Structure(s) named in this Agreement, which is/are located within 200 feet of the permitted area, and damaged as a result of the mining operation to be known as Fort Lupton Sand and Gravel'. A notarized signature by a Representative of Everist, Inc., and a notarized signature by the Structure Owner (Landowner or company Representative) in the spaces provided below shall satisfy the MLR law requirement and certify this agreement. A copy of the signednotarized agreement shall be kept by L.G. Everist and the Structure Owner. Signatures on following page Page 1 of 2 FL-DRM3=Ex s-structuret_etter & Agmt-Nov2024 L.G. EVERIST, INC. ROCK SOLID SINCE 1876 7321 E. -ni AVENUE, SUITE 200 HENirDERSON, COLOR/MX) 8064 PHONE 303-287-9606 FAx 303-289-1348 PERMITS'" EE / STRUCTURE OWNER AGREEMENT By and Betvveen rPer ittee (L.G. Everisty Inc.) and Owners of Structure(s) Listed Below within 200 feet of proposed sand and gravel mire site PERMIT APPLICANT/OPERATOR ACKNOWLEDGED BY: Permittee: L.G. Everist, Inc. Mail Address: 7 321 E 88th Ave., Suite 200,, Henderson, CO 80640 Contact: Islet ew Noteboom, 'dice President Signature: STATE OF Colorado ss COUNTY OF Adams ) The foregoing was acknowledged before me this date: by IVIa thew Noteboom as slice President of L.G. Everist, Inc. Notary Pubtic:_SIL (-Sac- STRUCTURE OWNER Date: )1/1/1/z19 My Commission Expires: iiiii_4•14 ACKNOWLEDGED BY: Owner(s): Tricycle Lane Tees, LLc Flail Address: 10140 Dallas Street, Henderson, CO 80640-8491 Contact (owner/rep a entetive): C or 4e1--) Signature: i At. —T F ) ss COUNTY/OF 4( ) The foregoing was acknowledged before me this date;f1/41110V6tAg: BRANDON WESCOTT OSTERT NOTARY PUBLIC « STATE OF COLORADO �NOTARY lid 20204045113 MY COMMISSION EXPIRES DEC 29, 2024 A-"Allr -"or- -vmmr- �MEW' 440:,,A3cifeb by Cto gr. of -T Notary Public: Kyle Cadiewe A Notary Public in and forth Province of Alberta Date: My Commission Expires: ki�j� Page 2 of 2 FL -CT S-ExS-StructureLetter & Agmt-Nov2024 Declination IWO N8`01'E Name: FORT LUPTON Date: 11/1 4/2 4 Skala: 1 inch 4 2,000 ft. Northwest Area se\ New Area - 52.33 AC. LOCATED IN PARTS OF , SECTIONS 19, 30 & 31, T -2-N, R -65-W', AND PART OF SECTION 25 & 36, T,2 -N, R -67-W, 6TH P.M., WELD COUNTY, COLORADO } 4-86a east Area New Ara • 149.93 Ac. gh 20 le L G. E E I TI INC. ET. LUPTON SAND AND GRAVEL MINE MAP EXHIBIT B - VICINITY MAP Tricycle Lards Limited .� r FITERIST, INCG .SOCK SOLID SINCE 1876 7321 E. 88TH AVENUE, SUITE 200 HENDERSON, COLORADO 80640 PHONE 303-287-0600' e FAX 308-280-1348 PERMITTEE / STRUCTURE OWNER AGREEMENT By and Between Permittee (L.G. Everist, inc.) and Owners of Structure(s) Listed Below within 200 feet of proposed sand and gravel mine site The Colorado Division of Reclamation, Mining and Safety (DRMS), abiding by the Colorado Mined Land Reclamation (MLR) Law, requires the permit applicant/operator to agree to reimburse the owner of any permanent man-made structure(s) within 200 feet of the permitted mining area for damage done to the structure(s) as a result of the permitted operation. Permittee: L.G. Everist, Inc. shall be the permittee (applicant/operator) of the following: Site: Fort Lupton Sand and Gravel, a permitted and amended sand and gravel mine, which has a reclamation plan of developed water storage; and is located within Sections 19, 30 and 31 (Township 2N, Range 66\N), and Sections 24, 25 and 36 (T 2N, R 67W), 6th Prime Meridian, Weld County, Colorado. Structure Owner listed below owns the following structure(s) listed below, which are located within 200 feet of the permitted area: Structure Owner: Roger & Judy Patterson Structures): building, house, fences The permittee, L.G. Everist, Inc., does hereby certify that the Structure Owner named in this Agreement shall be compensated for any damage to their Structure(s) named in this Agreement, which is/are located within 200 feet of the permitted area, and damaged as a result of the ruining operation to be known as Fort Lupton Sand and Gravel. A notarized signature by a Representative of L.G. Everist, Inc., and a notarized signature by the Structure Owner (Landowner or Company Representative) in the spaces provided below shall satisfy the MLR law requirement and certify this agreement. A copy of the signed notarized agreement shall be kept by L.G. Everist and the Structure Owner. Signatures on following page Page 1 of 2 FL-DRMS-ExS-Structure Letter & Agmt-Nov2024 1, G FVETRIS ROCK SOLID SINGE 1876 9 .1N 7321 E. 88TH AVENUE, SUIIL 200 HENDERSON, COLORADO 80640 PHONE 303-287-9606 0 FAx 303-289-1348 PERMITTEE / STRUCTURE OWNER AGREEMENT By and Between Permittee (L.G. Everist, Inc.) and Owners of Structure(s) Listed Below within 200 feet of proposed sand and gravel mine site PERMIT APPLICANT/OPERATOR ACKNOWLEDGED BY: Pe rm ittee: Mail Address: Contact: Signature: STATE OF COUNTY OF Adams L.G. Everist, Inc, 7321 E 88th Ave., Suite 200, Henderson, CO 80640 attw Noteboom, Vice President Colorado } } ss } Date: 1 The foregoing was acknowledged before me this date: 11 //y /0111 by Matthew Noteboom as Vice President of L.G. Everist, Inc. Notary Public: STRUCTURE OWNER ACKNOWLEDGE BY: Owners): Roger & Judy Patterson Mail Address: P.O. Box 122, Fort Lupton, CO 806 Contact (owner/representative): Signature: STATE OF ,' Colorado } } ss COUNTY OF L \A .. �► Lalr} My Commission Expires: The foregoing was acknowledged before me this date: by Notary Public: cativel of BRANDON WESCOTT OSTERT ' NOTARY PUBLIC - STATE OF COLORADO NOTARY ID 20204045113 MY COMMISSION EXPIRES DEC 29, 2024 ne} Date: 111)-A -?-1 My Commission Expires: NOVI 7)12- 02- ir Page 2 of 2 • KAITLYN KEMPEMA NOTARY PUBLIC STATE OF COLORADO NOTARY ID 20244041280 MY COMMISSION EXPIRES NOVEMBER 08, 2028 FL-DBMS-ExS-StructureLetter & Agmt-Nov2024 aseemigaisassorpossanallarso LO ittaWRISi ROCK SOLID SINCE 1876 itTe. 7321 E. 88Tr1 AVEIVUE, SUITE 200 HENDERSON, COLORADO 80640► PHONE 303-287-9606 Trio( 303-289-1348 PERMITTEE / STRUCTURE OWNER AGREEMENT By and Between Permittee (L.G. Everist, Inca and Owners of Structure(s) Listed Below within 200 feet of proposed sand and gravel mine site The Colorado Division of Reclamation, Mining and Safety (DRMS), abiding by the Colorado Mined Land Reclamation (MLR) Law, requires the permit applicant/operator to agree to reimburse the owner of any permanent man-made structure(s) within 200 feet of the permitted mining area for damage done to the structure(s) as a result of the permitted operation. Perrriittee: L.G. Everist, Inc. shall be the permittee (applicant/operator) of the following: Site: Fort Lupton Sand and Gravel, a permitted and amended sand and gravel mine, which has a reclamation plan of developed water storage; and is located within Sections 19, 30 and 31 (Township 2N, Range 66W), and Sections 24, 26 and 36 (T 2N, R 67W), 6th Prime Meridian, Weld County, Colorado. Structure Owner listed below owns the following structure(s) listed below, which are located within 200 feet of the permitted area: Structure Owner: Quaid Negrey Living Trust Structures): house, garage, 3 - sheds, woven wire fence, water well The permittee, L.G. Everist, Inc., does hereby certify that the Structure Owner named in this Agreement shall be compensated for any damage to their Structure(s) named in this Agreement, which is/are located within 260 feet of the permitted area, and damaged as a result of the mining operation to be known as Fort Lupton Sand and Gravel. A notarized signature by a Representative of L.G. Everist, Inc., and a notarized signature by the Structure Owner (Landowner or Company Representative) in the spaces provided below shall satisfy the MLR law requirement and certify this agreement. A copy of the signed notarized agreement shall be kept by L.G. Everist and the Structure Owner. Signatures on following page Page 1 of 2 FL-DRMS-ExS-StructureLetter & Agmt-Nov2Q24 o G [Lei ..;._%.1! LS 1 SAND ' ROCK � ROCK SOI ITS SINCE 1 876 7321 E. 88TH AVENUE, SUITE 2OO HENDERSON, COLORADO 8O604O PHONE 3O3-287-O6OO e FAx 3O3 -28O-1348 PERM1TTEE 1 STRUCTURE GINNER AGREEMENT By and Between Permittee (L.G. Everist, Inc.) and Owners of Structure(s) Listed Below within 200 feet of proposed sand and gravel mine site PERMIT APPLICANT/OPERATOR ACKNOWLEDGED BY: Perm ittee: L.G. Everist, Inc. Mail Address: 7321 E 88th Ave., Suite 260, Henderson, CO 86640 Contact: Matthew Noteboom, Vice President Signature: STATE OF COUNTY OF Adams r Colorado ) ss The foregoing was acknowledged before me this date: by Matthew Noteboom as Vice President of L.G. Everist, Inc. Date. 1/1"/V171/ IL/111411 Notary Public: a��'�-✓L� a✓5;C My Commission Expires: STRUCTURE OWNER ACKNOWLEDGED BY: Owner(s): Quaid Negrey Living Trust Mail Address: 6538 County Road 23.5, Fort Lupton, CO 80621 Contact (owner/representative): Signature: STATE OF Colorado ) 5S COUNTY OFPidGLMS ) The foregoing was acknowledged before me this date: by }r VrAke i � nAMiter 1.1961 s� Notary Public: mit ifirodArz‘..v_\ Pk 0 t BRANDON WESCOTT OSTERT NOTARY PUBLIC - SIATE OF COLORADO NOTARY ID 20204045113 MY COMMISSION EXPIRES DEC 29, 2024 Date: oN-arta 1D1 (2--b9--q of LOLO*3 (2-9,) It 1 A -P\ -On 1(:)() °di\ My Commission Expires: Q I PLC° jrzo1:7- Page 2 of 2 ARLE [ H MICHELa MUNO ESENDIZ NOTARY PUBLIC STATE O� 20234003499 COLORADO NOTARY MY CommissiaN EXPIRES o1l2oon I F FL-DRMS-ExS-StructureLetter & Agmt-Nov2024 r.. SAID ROCK' c • awl Maio I r. . 7 Rocco ,for in ShivcE 1876 • 321 E. 88TE AVEMJE, Su1l� 200 HENDERSON, COLORADO 80640 PHONE 303-28r--9606 o FA -C 303-289-134,8 March 11, 2025 City of Thornton Attn: Emily Hunt, Utilities Deputy Dir. 9500 Ciyic Center Drive Thornton, CO- 80229 Sent via Certified Mail # 9589-0710-5270-2272-8568-94 - RE: Notice and Structure Agreement to owners of Structures within 200 feet of proposed amended sand and gravel mine -- Fort Lupton Sand & Gravel, DMRMS Permit # Iii -1999-120 Dear Ms. Hunt: This letter shall serve as the required and notice that L.G. Everist, Inc. has filed an amendment application with the Colorado Division of Reclamation, Mining and Safety (DBMS) to amend an existing permit_ to mine and reclaim the site known as Fort Lupton Sand and Gravel. The site permit is for raining the ,natural ,sand and gravel reserves and reclaiming it as developed water storage. The permitted and :amendment properties have several land uses — mining, water storage,agriculture, ditches, and oil and gas:pro-du-dion, which are consistent with the currently approved Reclamation Plan. • ..The exr,stirig . Fort Lupton Sand and Gravel site -area tote included.in the permit contains ar :areas .are -located within Sections 19, 30 2N, R 67w), 6th Prime Meridian, Wei west of the. South Platte River, ear 14.5 on the south. The amen existing permit, and north ^; itrA .4910 0 As an Owner of Recr \qik Safety (IDRMS‘)". . 4s Q { Structure A reer �'►`� S)ki`'� CV"° l‘h 171 fre ioes‘‘Ces, . t r 44 be z k0 � :a. The' opt structures the structure b. -The operator/ap, demonstrates that < vt i +Uvieas i ie-ti.ivi i e.,�veri v i. � \\O{`/ �, L.G. Everist, Inc. has condut DRMS, which calculated the n‘ `c damaged by mining or reclamati adverse effects to structures but Vies, s, damage to your structures}, if the air. � S approximately 515 acres, and the amendment • 202 acres. The permitted and amendment b-) 2N, Range 66w}, Sections 24, 25 and 36 (T .'he existing permit properties are located hounded by CR 18 on the north, and CR sint to the north boundary of the J �-A 40(3C �ti .4e' ,gyp ,�'� VSr ds oei co � analysis for this permit application to the6(:) s\'� to ensure that an type of structure will not be g Y Yp � um m itti ng to the setbacks, we do not expect any -61' _gored that L.G. Everist, Inc. will reimburse you for any As caused as a result of our operations. u are receiving this letter and -'eclamation, Mining and per: r ere iermanent man-made agrees to reimburse one mining operation. OR Stability analysis which _rea shall not be damaged by mining „Ito. FL-DRMS-ExS-Structure Letter & Agmt-Mar2D25 City of Thornton ter . 'y -.-;^ti. - 'm+�. �'-Fl rr P I i � i ~- Z F -A I � 'r. RocK SOLID SINCE 1876 9 av"- `( 7321 E. 88TH vEnuE, S urrE 2, 0 0 HEN-DEP:3ON, COLORADO 80640 PHoNr 303-.287-9606 isx 303-289-1348 March 11, 2025 Bronn & Renee Strange 12335 County Road 14 '/ Fort Lupton, CO 30621 Seat via Certified Mail # 9589-0710-5270-2272-3563-70 RE: Notice and Structure Agreement to Owners 0f Structures within 200 feet of proposed amended sand and gravel mine --- Fort Lupton Sand & Gravel, DRMS Permit ## M-1999-120 Dear NAME: This letter shall serve as the required and notice that L.G. Everist, Inc. has filed an amendment application with the Colorado Division of Reclamation, Mining and Safety (DRMS) to amend an existing permit to mine and reclaim the site known as Fort Lupton Sand and Gravel. The site permit is for mining the natural sand and gravel reserves and reclaiming it as developed water storage. The permitted and amendment properties have several land uses — mining, water storage, agriculture, ditches, and oil and gas production, which are consistent with the currently approved Reclamation Plan. The existing Fort Lupton Sand and Gravel site �: - area to be included in the permit contains apr areas are located within Sections 19, 30 ar 2N, R 677), 6th Prime Meridian, VVeld r west of the South Platte River, east r/ 14.5 on the south. The amendmee existing permit, and north of Cr% As an Owner of Record o Structure Agreement Safety (DRMS). Wh a. The operat structure the structu rt`` 41e. S�' ace . 4Cr *SC O ffr e'S s�s gic 6 l• u' r v �4 Y,�`b CP ;es- Qt) arc b. Theo eratoria � P pp � � � 0• GO demonstrates that a � ` :- 1 or reclamation activiti L.G. Everist, Inc. has cond ucte,' DRMS, which calculated the mink O damaged by mining or reclamation eS:o adverse effects to structures, but pleas ‘40, damage to your structure(s), if the dama�s6 \to �p l O-Gq� P tfrR 's approximately 615 acres, and the amendment 202 acres. The permitted and amendment 2N, Range 66K, Sections 24, 25 and 36 (T existing permit properties are located funded by CR 18 on the north, and CR ,f to the north boundary of the \))% \*9- \ tOs Akik (;)1() e-� Cp .6% ..y re receiving this letter and `Imation, Mining and oanent man-made grees to reimburse e mining operation. OR .ability analysis which .� shall not be damaged by ruining .=;psis for this permit application to the sure that any type of structure will not be sing to the setbacks, we do not expect any Jot L.G. Everist, Inc. will reimburse you for any sed as a result of our operations. FL-DRMS-ExS-Structure Letter & Agmt-Mar2025 B & R Strange 1 „PT -1E VTERIST I .bc.,\ !? SAND ROCK i ROCK SOT JD SPICE 1876 321 E. 88TH AVENUE, Surug 200 HENDERSON, COLORADO 80640 PHONE 303-287-9606 FAX 303-289-1348 March 11, 2026 Jose G Rubalcava & Marivel Ruiz 11490 County Road 14 2 Fort Lupton, CO 80021 Sent via Certified Mal! # 9589-0710-5270-2272-8583-87 RE: Notice and Structure Agreement to owners of Structures within 200 fleet of proposed amended sand and gravel mine — Fort Lupton Sand & Gravel, DRIV1S Permit # M-1999-'120 Dear NAME: This letter shall serve as the required and notice that L.G. Everist, Inc. has filed an amendment application with the Colorado Division of Reclamation, Mining and Safety (DRMS) to amend an existing permit to mine and reclaim the site known as Fort Lupton Sand and Gravel. The site permit is for mining the natural sand and gravel reserves and reclaiming it as developed water storage. The permitted and amendment properties have several land uses — mining, water storage, agriculture, ditches, and oil and gas production, which are consistent with the currently approved Reclamation Plan. The existing Fort Lupton Sand and Gravel site contain' area to be included in the permit contains approxi,m areas are located within Sections 19, 30 and 3' 2N, R 8711v), 6th Prime Meridian, VVeld Col west of the South Platte River, east o 14.5 on the south. The amendmer existing permit, and north of As an Owner of Recor Structure Ag reern Safety (DRME a. The operator/ structures with), the structure owl. �i Cle5it k(�'� sevc „se ,„,„,e9.0.,‘"c• b. The operator lapp llc�. ,�° `��6“AC c‘r. e` Ert 1/40 demonstrates that any O <76��sk� or reclamation activities c'et,s iCt L.G. Everist, Inc. has cond ucte DRMS, which calculated the miry co s damaged by mining or reclamatioi csts adverse effects to structures, but plt_t� ekct _ ced that L.G. Everist, Inc, will reimburse you for any damage to your structures}, if the day .Jas caused as a result of our operations. soximately 815 acres, and the amendment acres. The permitted and amendment Range 66w}, Sections 24, 25 and 36 (T eisti ng permit properties are located ided by CR 18 on the north, and CR ko the north boundary of the ire receiving this letter and -;lamation, Mining and r: N r C' . 1 r �� ai r 2925 \&.(L. �� • �0 \ �\� kri, 1 -N c \,6 0 �`�� CP So5 0 \P _Ar sis for this permit application to the ��g ��' - y p p p t ��\e\, dnsure that any type of structure will not be c . i imittin to the setbacks, we do not expect an g p any ermanent man-made ` frees to reimburse ing operation. OR analysis which tall not be damaged by mining FL-DRMS-ExS-StructureLetter & Agmt-Mar2g25 J Rubalcava & 1111 Ruiz L.G. Everist, Inc Ft. Lupton Sand and Gravel BANK ARMORING PLAN This bank armoring plan is presented to explain the bank armoring and slope protection proposed for two mining phases that will be o eclaimed as lined water storage reservoirs, and where mining will be within 400 feet of the western bank of the South Platte River. The bank armoring is intended to protect the finished slopes of the reservoir phases in case of a 100 -year flood event o ccurring after the phase has been reclaimed. The 100 -year Floodplain line information has been included on all of the MAP ExmBITs in the application Packet. The two phases that have mining within 400 feet of the South t latte River are Northeast #1 and Northeast #3. The locations of t he proposed bank armoring in these two phases are shown on MAP EXHIBIT F - RECLAMATION PLAN MAP . Northeast #1 Phase has approximately 1,030 feet of reservoir banks that will be armored, starting at t he southeast corner and going north along the eastern perimeter. Northeast #3 has approximately 900 feet of reservoir banks that will be armored, starting at the southeast corner and going north along the eastern perimeter. Armoring will only be installed on t he inside banks of the reservoirs. Armoring will not be installed on the river bank itself because the river bank is 300 feet or farther from of the top of the slope of the mining limits, the river bank is outside the permit area, and it is not o n land owned by L.G. Everist, Inc. Reservoir Bank Armoring Methods and Materials The finished reservoir banks in Northeast #1 and Northeast #3 will be armored as mining progresses through the Phase. The toe o f the slope armoring will be at least 5 feet below the thalweg o f the South Platte River channel. The base of the armoring will average 8 feet below the existing ground surface at the mine. The armoring will have a 3h to 1v slope and will be 2 feet or more t hick. This will leave an armored face along the top of the bank and the slope into the reservoir that is 31.6 feet wide. This will require approximately 2.35 cyd/lft, along the finished reservoir slopes. Using the formula C= (A2+B2} t'� to determine the armoring length on the slope. Then the unit volume is VT,= (L*W*H)/27cft/cyd; where L=31.6', W=1.0', H=2' Vi,= (31 . 6*1*2)/27=2 . 34cy/lft rounded to 2.35 cy/lft Armoring material will be recycled concrete fragments with surface rebar removed, so that it meets the definition of Inert Materials. The concrete will be sized 9 to 15 inches averaging 12 inches. After the larger material is placed, fines will be mixed in to fill voids. This size of material has a Safety Factor of LGE - FT. LUPTON SAND AND GRAVEL March 2025 L.G. Everis t, Inc. March 2025 Ft. Lupton Sand and Gravel M-1999-120 BANK ARMORING PLAN ft 3U SOP OF SCOPE FIGURE 1 SLURRY WALL P ERMIT uISE W BANK VER CHANNEL THALWEG 2,35 cy.cl/l F t 50 40 30 20 10 TYPICAL RESERVOIR NO SCALE NOTES: 1. BANK ARMORING SHOWN ON RECLAMATION MAPS IS APPROXIMATE LOCATION. ACTUAL LOCATION WILL DEPEND ON LOCATION OF TOP OF SLOPE AT THE TIME IT IS INSTALLED. 2. MATERIAL USED FOR ARMORING WILL BE WELL AGED BROKEN CONCRETE. THAT HAS ALL EXPOSED SURFACE REBAR REMOVED. AT A MINIMUM 2,350 CUBIC YARDS WILL BE STOCKPILED ON THE MINE FOR USE IN ARMORING. THIS IS ENOUGH TO MATERIAL TO ARMOR A MINIMUM OF 1000 FEET OF EXCAVATION BANK. 3. STOCKPILES OF ARMORING MATERIAL WILL BE PLACED PARALLEL TO THE RIVERBANK SO IT WILL NOT INTERFERE WITH FLOWS IN THE FLOOD PLAIN. THE STOCKPILES WILL BE PLACED BETWEEN THE PERMIT LINE AND THE TOP OF SLOPE WITHIN 500 FEET TO THE AREA WHERE IT WILL BE PLACED. 0 -10 -20 -30 BANK ARvORING -zzo -275 -230 -280 4. THE BANK ALONG THE EXCAVATED AREA WILL BE ARMORED FROM THE EXISTING SURFACE TO A POINT AT LEAST 5 FEET BELOW THE CHANNEL THALWEG. 5. THE SIZE OF THE MATERIAL WILL FALL IN THE RANGE OF 9 TO 15 INCHES AVERAGING 12 INCHES AS DISCUSSED IN THE BANK ARMORING PLAN AND WILL BE PLACED BELOW GRADE. MAR 17, 2025 - 15: 50: 51 Ft. Lupton Sand and Gravel Bank Armoring Plan (cant) 1 . 2 6 . See the supporting document : BANK ARMORING PLAN - SAFETY FACTOR CALCULATIONS . The bank armoring materials will be installed on 2,000 foot sections of finished reservoir slopes within 3 to 6 months after sloping is completed. At a minimum, 4,700 cubic yards will be stockpiled, on the mine for use in armoring, which is enough to armor a 2,000 feet of finished bank slopes. At no time will there be more than 2,000 feet of armoring needing to be placed. P rior to installing the bank armoring, the stockpile of armoring materials will be placed in the setback area above the reservoir slopes so the materials can easily be pushed into place on the finished slopes. Any stockpiled materials will be placed parallel t o possible water flows, so they will not interfere with water flows in the flood plain if flooding occurs. Cross -Section Drawing The attached FIGURE 1 is a cross section drawing of the bank armoring plan and includes notes of the armoring methods and materials discussed in this section that will be used to protect t he banks along the southeast and east sides of Northeast #1 and Northeast #2 Phases, respectively. Supplied supporting documents Figure 1 - Bank Protection Plan cross section Safety factor calculation page Sources Armoring Plan designed is based on the Urban Drainage and Flood Control District Guideline published July 2013 starting with Section 2.4.1- Riprap. The Hydraulic Radius and Specific Gravity o f the material were supplied by Mr. Tim Cazier - DRMS staff e ngineer. LGE - FT. LUPTON SAND AND GRAVEL March 2025 L.G Everist, Inc. Ft. Lupton Sand and Gravel M-1999-120 SF cos 0 tan 0 II n.tan 0+sin 0 = yRS s 2 its = i lLc slope of pitside bank, in do tes to the horizontal angle of repose of pitside bank construction materials in degrees stability factor Ss = specific gravity ofriprap particles 7 = specific weight of water = 62.4 lbS/ft3 .+�50 = median riprap particle size, in feet I = hydraulic radius at normal depth of flow down pitside slope, in feet face slope of pitside bank, in feet per foal Bank Armoring Plan (cont) Safety Factor Calculations 'Y = 62.4 R=2 S = 0.01 TS 1.248 77 1 rs cssai)yDso Z s = 1.248 Ss= 2.4 DS0 = 1 r� 26.2 87.4 n = 0.3 F ._ cos 0 ton 0 ntan 0+sin 9 0 = 18.43° 0 = 35° n = 0.3 cosA = 0.9487 to n0 = 0.7002 sine = 0.3161 SF = 0.6643 0.5262 SF = 1.26 I Hello