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

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Exhibit D Page 13 well as utility and other"easements" or"rights-of-way"across the entirety of the Permit Area. Design parameters include: • Targeted approximate annual production(sales)of a nominal 5 million tons per year; • Mine to a nominal 30 ft depth below ground surface and may vary with topographic undulations and/or thickness of economically and/or recoverable resource; • Minimal transport distance for process plant discard disposal(via in-pit dry stack); • Diversion of area-wide drainage/run-on away from active mining areas; • Diversion of plant area precipitation run-off to the active pit depression(for infiltration); • Containment of footprint precipitation within active pit depression(for infiltration); • Concurrent reclamation(at steady-state)with no provision for pit backfill(other than growth medium replacement); • Provisions for temporary relocation and reconstruction of existing internal roadways,where necessary; • Pit sidewall slopes at 3H:1V and 5H:1V(approximate natural angle of repose);and, • Ranch and/or oilfield service access will be maintained at all times and as per individual agreements with the respective stakeholders • Prescribed minimum 50-ft setback may be greater and vary as per agreements with the respective stakeholders Mine planning efforts to date have identified the following general pit progression on the basis of a nominal 5 million tons per year ROM production rate. CSC notes that while the general pit progression is provided at a level of detail sufficient to determine anticipated maximum areas of disturbance and associated reclamation obligations,as specifically addressed in Exhibit E: Reclamation Plan, it may,as earlier indicated,be subject to change due to unanticipated factors. Further,it should be noted that all volume and/or tonnage figures presented herein are considered engineering estimates only and are similarly subject to change. • Year 0—Pre-Production Activity(Central Portion of Section 2) Initial mine development will require the nominal 1-ft thick growth medium to be pre-stripped from: (1) the plant area(comprising approximately 107 acres,and yielding roughly 172,000 cubic yards);(2)the initial portion of the Process Discard Stockpile(PDS)waste storage area(comprising approximately 10 acres,and yielding roughly 16,000 cubic yards); and,(3)approximately one-half of the full Year 1 mining block(comprising approximately 64 acres, and yielding roughly 103,000 cubic yards),respectively. This approximately 291,000 cubic yards of material will be placed in an interim growth medium stockpile(TS- 0)to be temporarily situated within the west portion of the Year 7 mine block, south of the process plant area.It is anticipated that concurrent reclamation of portions of the PDS and other non-utilized areas of disturbance will subsequently deplete the stockpile prior to the advance of active mining into the Year 7 mining block. CSC estimates that the TS-0 stockpile feature will occupy a footprint area of approximately 12 acres,with a nominal height of 15 ft., as shown on Exhibit D-2: Mine Plan. Concurrent with the final stages of plant construction, a limited tonnage of the sand resource will be recovered from within the initial(easternmost)footprint area of the process discard stockpile(PDS)and the Year 0 mine block,which is to extend westerly from the plant area, situated along(and generally parallel to)the northern boundary of the Permit Area. This recovered sand material will be utilized to establish the initial run-of-mine(ROM)stockpile,to be located just south of the plant area and proximal to Colorado Sand Company II, LLC Kersey Mine Construction Material Regular(112)Operation Reclamation Permit Application June 7,2024