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// PAGE 2 <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 /> <br /> <br />Pit P125_S1 has a tank battery located at its southeastern border; extraction will not occur within 25 feet <br />of these tanks while this infrastructure is still in place. An underground oil and gas pipeline is located <br />between Pits P125_S1 and P125A; extraction will not occur within 10 feet of the pipeline easement while <br />the pipeline is in place. Finally, one abandoned oil and gas well each (two total) is located within the <br />extraction extents of Pits P125A and P125B, both of which are pending removal (refer to map Exhibit C-1 <br />for ownership details); extraction will not occur within 25 feet of the wells before they are removed. <br /> <br />Perimeter Keyway Extraction will maintain a perimeter slope no steeper than 1.25H:1V. Where pit depths <br />exceed 30 feet below ground surface (bgs), extracted final walls will be lined to 25 feet bgs as soon after <br />extraction as practically possible and backfilled at slopes no steeper than 3H:1V for depths 30 feet bgs <br />and greater (refer to addendum: Slope Stability Analysis for additional information). At the toe of the cut <br />perimeter slope is the keyway that runs below the extracted deposit of the basin, into the bedrock, which <br />allows the subsurface waters to flow to the settling basin and discharge pumps necessary to keep the cut <br />basin dry during a time of extraction and reclamation of the affected perimeter slopes. <br /> <br />The keyway dimensions may vary more or less from 4± to 8± feet in depth and 4± to 16± feet in width. <br />Extraction must be broad enough to allow equipment to safely approach the toe and excise the bed <br />dimensions where the resulting channel is sufficient to convey the groundwaters to the settling basin for <br />discharge. <br /> <br />Please Note: The graphic representation of the Initial Extraction Area and the topsoil stockpile location in <br />Map Exhibit C-2 are idealized, and may vary in shape, size, and location presented. Annual Reports will <br />report on the nature and extent of affected lands and more properly reflect actual conditions on the <br />ground in a given year of operations. <br /> <br />During extraction, a predominantly vertical advancing pit wall (the extraction front) is not anticipated due to <br />the use of excavators in the removal of the material deposits. Excavators provide a great deal of control <br />over the extraction process. The maximum length of the extraction front will likely never exceed the <br />maximum cross-sectional length of Pit P125B, or 2,000± feet, or less; in any given direction. The advancing <br />front will result in a moving face with a slope typically equal to or flatter than 1.25H:1V, and commonly not <br />greater than 1.25H:1V along the perimeter of the extraction limits to depth. <br /> <br />Acreage to be affected during the first year of extraction activities includes the establishment of the Initial <br />Areas of Extraction (P125_S1) and attending settling pond and means of transportation by ground haulage. <br />The Initial Area of Extraction will expand until concurrent reclamation follows as each Pit is exhausted of <br />resource. <br /> <br />Although initial extraction may otherwise result in temporary slopes up to 1.25H:1V, all cut slopes will be <br />backfilled with unconsolidated bedrock, overburden (on-site unmerchantable excess materials, or <br />imported inert materials) and soil to advance the reclamation and completion of the desired basins. Pit <br />P125_S1 is planned to be completely backfilled with fill and topsoil placement expected to be completed 1- <br />2 years after extraction in this pit is complete. It is currently anticipated that the fill material will come from <br />excess material currently available on the adjacent Raptor Materials Kurtz operation (DRMS permit M1999- <br />006). <br /> <br />Concurrent backfilling and grading of cut perimeter slopes, while desirable, may be obstructed in time and <br />extent by the need to maintain keyways and basin discharge during extraction. Backfilling of slopes can <br />only occur once enough of the floor is exposed to facilitate backfilling and finished grade of extracted <br />basin slopes without interfering with basin discharge operations. This makes concurrent backfill difficult <br />to accurately forecast. Regardless, any completed slope remediation will be indicated in any subsequent <br />DRMS Annual Report.