2025-03-14_PERMIT FILE - M2025016 (22)

Home Browse Search

// PAGE 4 EXHIBIT L 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 Please Note: The graphic representation of the Initial Extraction Area and directions are idealized and may vary in shape and size presented. Annual Reports will report on the nature and extent of affected lands and more properly reflect actual conditions on the ground in a given year of operations. The life of the operation is based upon a base rate of extraction approximating 800,000 tons of material extracted in a given year. This extraction rate will shift with the market and may average 800,000± acres but could be faster or slower. Starting out, initial warranty necessary to cover the costs of reclamation for the extent of disturbance in a given year will also vary in time and circumstance, as the initial disturbance is generally less at the onset. So, a rate of disturbance can be estimated and the warranty adjusted incrementally with time and circumstance. Starting out in the initial projected 5 years of Operations, and incrementally thereafter, necessary warranty can be estimated and adjusted in incremental Units based upon the projected Life of the Operation. Essentially, a 5-6± year Life of Operations assumes a rate of extraction of approximately 800,000 tons per year. Considering the Mining-Regrading Schedule included as Table E-1 in Exhibit E, and the general development concept shown on Exhibit L – Financial Warranty Map, Raptor estimates for the initial 5-year period, development of an initial 60.7-acre excavation across Pits P125_S1, P125A, and P125B will result in creation of approximately 12,149 feet of external perimeter pit wall. During the same time period, Pit P125_S1 will be backfilled; P125A will be fully reclaimed; and P125B will have depths 25 ft bgs and greater lined, and depths 30 ft bgs and greater backfilled at 3H:1V. No reclamation or lining at shallower depths than those previously stated is anticipated in Pit P125B in the initial 5-year period. It is important to note that the financial warranty estimates the closure cost of the operation at the end of the expected first 5-year period. It is assumed in this initial estimate that no reclamation activities (regrading, lining, topsoiling) will take place. The cost estimate then reflects reclaiming the projected excavation at that point in time. The actual extents and shape of the excavation may change, and actual progress will be addressed in the annual reports. Raptor will update this Exhibit L, the reclamation cost estimate, and any other exhibits as required for purposes of determining financial warranty prior to disturbance reaching the limits projected in the initial 5 years of Operations as described in this Exhibit and shown conceptually on Exhibit Maps C-2 and L. In the following breakdown of components for estimating reclamation cost, factoring of the 5-year projected disturbance against the final pits is used where appropriate to obtain a reasonable estimate of work required. Various approaches to obtain the necessary quantities exist, but Raptor believes the approaches and quantities are reasonable and alternate approaches would be no more certain as to the accuracy obtained. This is simply due to the variable nature of the deposit and the need to field-fit the excavation to ensure safety in the conditions encountered. Dewatering Raptor assumes at the 5-year mark, Pit P125A will have been fully regraded, lined, and backfilled, and therefore will not require any further reclamation work below the static WSEL. Pit P125B will be in an unlined state and would recharge to static water level requiring dewatering of the pit to allow reclamation operations