2025-03-14_PERMIT FILE - M2025016 (14)

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// PAGE 2 EXHIBIT E Raptor Materials, LLC Cogburn Sand, Gravel, and Reservoir Project February 2025 A Regular Impact (112) Construction Permit Application – Colorado Division of Reclamation Mining and Safety, Office of Mined Land Reclamation Pits P125A and P125B will be reclaimed as developed water resources through the construction of lined reservoirs. Pit P125_S1 will be backfilled for use to be chosen at a future date by the property owner. Rule 3.1.2 Reclaiming Substituted Land All affected land shall be reclaimed; no previously mined land shall be substituted for purposes of reclamation. Rule 3.1.3 Time Limit and Phased Reclamation There are no fixed sequences or phases scheduled as part of the extraction plan. Instead, Pits are used instead of Phases to describe the activities, since each Pit can be accessed concurrently with another, instead of a strict sequential requirement. An Initial Extraction Area that is scheduled to be completed within 5 years is presented in Map Exhibit C-2. More detailed information about sequencing and the Initial Extraction Area is presented in Exhibit D and Exhibit L. As discussed in Section (e ) of Exhibit D, the estimated timetable for extraction, commencing approximately summer to winter 2025, is estimated to take 8-9± years combined, or longer, followed by an additional five years to complete reclamation; or a total estimated life of the mine of 13-14± years, and ending approximately winter 2038 to 2039. Rule 3.1.4 Public Use No land within the permit area is intended to be open for public use during the Operations. Rule 3.1.5 Reclamation Measures – Materials Handling No lining or final grading will occur in Pit P125_S1 as it will be backfilled to approximately original grade as soon after extraction as practically possible. Backfill and topsoil placement expected to be completed 1-2 years after extraction in this pit is complete. It is currently anticipated the fill material will come from excess material currently available on the adjacent Raptor Materials Kurtz operation (DRMS permit M1999-006). As extraction progresses through the Pits, the resulting 1.25H:1V slopes created during extraction will be concurrently modified when and where practical. Where pit depths exceed 30 feet below ground surface (bgs), extracted final walls will be lined to 25 feet bgs prior to placement of any backfill and as soon after extraction as practically possible to allow later tie in to the upper liner (between 25 feet bgs and 5 feet bgs) (see Figure 1 below). They will then be backfilled at slopes no steeper than 3H:1V for depths 30 feet bgs and greater (refer to addendum: Slope Stability Analysis for additional information). ,. Concurrent reclamation is a natural incentive for Operations to speed site recovery while generally serving to lower attending financial warranty burdens. The cut slopes along the extraction limits perimeter will be finish graded by methods including pushing the resulting pit bottom with a dozer upslope, excavation, hauling and placement of pit bottom material as backfill, or backfilling using previously excavated surplus material of limited or low market value until the resulting basin slopes conform with Rule 3.1.5(7). All finished grades in Pits P125A and P125B will be 3H:1V with an underlying liner (see Figure 2 below).