2024-06-07_PERMIT FILE - M2024026 (23)

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Exhibit D Page 19 is slated for use in concurrent reclamation, in addition to approximately 4,000 cubic yards to be taken from TS-1,thus reducing the cumulative total of TS-1 stored material to approximately 516,000 cubic yards. Some 862,000 cubic yards of process discard are projected to be placed in the PDS, bringing the total volume in the PDS to approximately 14.9 million cubic yards. Year 18: Consistent with the depicted Year 17 easterly shift(i.e.,full-length panel), Year 18 continues the southward progression through the northern portion of Section 15. Planned production over the projected 79.9-acre mine block is set at approximately 5.1 million tons for the year. The full extent(approximately 140,000 cubic yards)of pre-strip growth medium is slated for use in concurrent reclamation,in addition to approximately 15,000 cubic yards to be taken from TS-1,thus reducing the cumulative total of TS-1 stored material to approximately 501,000 cubic yards. Some 883,000 cubic yards of process discard are projected to be placed in the PDS,bringing the total volume in the PDS to approximately 15.8 million cubic yards. Year 19: In a similar manner,Year 19 mining activity continues the southward progression, advancing into the central portion of Section 15. Planned production over the projected 67.5-acre mine block is set at approximately 5.0 million tons for the year. The full extent(approximately 125,000 cubic yards)of pre- strip growth medium is slated for use in concurrent reclamation, in addition to approximately 17,000 cubic yards to be taken from TS-1,thus reducing the cumulative total of TS-1 stored material to approximately 485,000 cubic yards. Some 868,000 cubic yards of process discard are projected to be placed in the PDS, bringing the total volume in the PDS to approximately 16.7 million cubic yards. Year 20: The final LOM year depicted on Exhibit D-2: Mine Plan is Year 20,during which the continued southward progression completes the mining of the northern one-half of Section 15. CSC notes that additional mineable resources remain within TMDZ-2(to the immediate south of the Year 20 progression termination line)and TMDZ-1 (largely within Section 14 and over to the east of TMDZ-2),respectively. Planned production over the projected 68.7-acre Year 20 mine block is set at approximately 5.0 million tons for the year.Nearly all(approximately 107,000 cubic yards)of pre-strip growth medium is slated for use in concurrent reclamation,with a small surplus volume of approximately 3,000 cubic yards being routed to TS-1,the result being a fmal cumulative total of TS-1 stored material of approximately 488,000 cubic yards. Some 873,000 cubic yards of process discard are projected to be placed in the PDS,bringing the final total volume in the PDS to approximately 17.6 million cubic yards. At the end of Year 20(i.e.,full build-out),the PDS feature is anticipated to occupy an approximately 173- acre footprint area,with an anticipated height of 100-to 120 ft as measured from the pit floor. The top of the feature is estimated to encompass approximately 73-acres in surface area. The TS-1 feature is anticipated to occupy an approximately 60-acre footprint area,with an anticipated 85- ft height at full build-out;however,this feature will be removed(in its entirety)as it will be utilized in final site reclamation activities. • Post Year 20(Potential Extension of Mine Life Within TMDZ-1 and/or TMDZ-2) Post Year 20(Temporary Mining Deferral Areas): As indicated earlier,CSC has identified and set aside two discrete "Temporary Mining Deferral Zones"(TMDZ-1 and TMDZ-2,respectively),within which there remain deficiencies in the geologic database as to definitive mineable resource characteristics Colorado Sand Company II, LLC Kersey Mine Construction Material Regular(112)Operation Reclamation Permit Application June 7,2024