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// PAGE 1 <br />EXHIBIT D <br /> <br /> <br /> <br />Raptor Materials, LLC Cogburn Sand, Gravel, and Reservoir Project February 2025 <br />A Regular Impact (112) Construction Permit Application – Colorado Division of Reclamation Mining and Safety, Office of Mined Land Reclamation <br />Exhibit D – Extraction Plan <br />The mining plan shall supply the following information, correlated with the affected lands, map(s) and <br />timetables: <br />Section (a) <br />(a) description of the method(s) of mining to be employed in each stage of the operation as related to any <br />surface disturbance on affected lands; <br /> <br />Resource recovery will commence by first removing the upper [A profile/plow layer] six to twelve inches of <br />soil [six (6.0±) inches typical], combined with existing grass or crop stubble. Removal will utilize scrapers or <br />excavators, aided by dozers where necessary, and hauled to the northern corner of P125A. All extraction <br />and surface related activities detailed in this application will occur under an approved Fugitive Dust Permit <br />issued by the Colorado Department of Public Health and Environment (CDPHE). <br /> <br />Until re-soiling activity occurs, where harvested soils have been stockpiled and remain undisturbed for <br />reclamation or sale, they will be seeded with the mixture specified under Exhibit L - Table L: <br />Primary/Preferred Revegetation Seed Mixture. A stabilizing cover of native vegetation may take up to <br />three years to fully establish the desired cover. In the event the native seed mixture fails, an optional <br />mixture of predominantly introduced species will be used as a fall back to better assure a stabilizing cover <br />of vegetation. Still, using the preferred native seed mixture offers opportunity to gauge the potential <br />performance of the selected species prior to utilizing it over larger areas requiring reclamation later in the <br />life of the resource recovery operation. <br /> <br />Once vegetation is established over the initial reclamation soil stockpiles, they will likely remain <br />untouched until all other resources have been extracted within Pit P125A; at that time, stockpiled topsoil <br />will be placed on designated reclaimed areas or moved to the southeastern corner of Pit 125A. Where <br />concurrent reclamation is possible, operations will utilize soil in an over the shoulder method when <br />practical. In this manner, reclamation is expedited without increasing soil stockpile volumes while <br />reducing expenditures related to labor, handling, and time. <br /> <br />Soil salvaged as stated above is expected to exist in-situ at six to twelve inches in thickness. Resulting <br />volumes of salvaged soil will range from 8,400 - 16,800 cubic yards for Pit P125_S1, from 17,800 - 35,600 <br />cubic yards for pit P125A, and from 22,800 – 45,500 cubic yards for pit P125B. Salvaged soil will generally <br />be stockpiled in the northern corner of Pit P125A. Smaller short-term stockpiles may be created along pit <br />edges where regrading is imminent or in progress and re-soiling will follow. <br /> <br />Re-soiling volumes required above the waterline of the lined water storage will require much less soil. The <br />re-soiling areas are estimated at 4.6 acres for Pit P125A and 5.7 acres for Pit P125B with volumes calculated <br />based on a nominal six inches of soil cover at 3,703 and 4,601 cubic yards, respectively. Topsoil salvaged <br />from Pit P125_S1 will be sufficient to re-soil the area once the pit is backfilled to approximately existing <br />grade. Excess soil not needed on site may be sold. <br /> <br />Following soil salvage, the balance of the extractable deposit will be removed to the depth <br />of the unconsolidated or weathered bedrock using excavators and trucks, with the excavated sand and <br />gravel material transported offsite by conveyor to the plant site pit run located on the northeast adjacent <br />P115 Kurtz site (M1999-006), and subsequently processed by screening, crushing, washing, and other <br />methods to size and properly dimension the extracted material into saleable product. Resource recovery <br />will commence from the southwest corner of pit P125_S1, establishing a keyway moving north and east, <br />and then moving northeastward via an advancing face. The planned first discharge point is shown on <br />Exhibit Map C-2 from the northwest corner of pit P125_S1 to the Last Chance Ditch.