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Exhibit Page 13 <br /> EXHIBIT D—MINING PLAN <br /> MUNROE QUARRY(M-77-002HR) <br /> Larimer County, CO <br /> Safety& Environment Office Rapid City, SD 57709-0440 (605)342-7442 FAX 394-6979 <br /> Mining will be a continuation of the existing 9.9 acre mining operation, which has been in existence since <br /> 1977. <br /> 1. Topsoil cover(estimated four inches or less) will be removed by a bulldozer and stockpiled for future <br /> reclamation. Stockpiles will be protected, as needed, by seeding or use of cover material or agents and <br /> will be located in previously mined areas not yet reclaimed. <br /> 2. Dolomitic shale will be removed by bulldozer or drilling and blasting.The material (up to 35 feet thick) <br /> will be hauled to previously mined areas and used for backfilling. <br /> 3. Gypsum will be extracted from a bed of 25-35 feet thickness by drilling and blasting. <br /> 4. Shotrock gypsum will be used as a feedstone for a portable crusher,to be placed with stockpiles of <br /> feedstone and crushed product in a pit area where material has been previously extracted but not yet <br /> reclaimed. <br /> 5. Crushed gypsum in various sizes will be stockpiled and then loaded by wheeled loader into over-the- <br /> road haul trucks and trailers. <br /> 6. Depending on thickness of the bed, the area disturbed during each mining season will be <br /> approximately one-half to one-acre. Normally,the gypsum bed will be mined in a single bench, although <br /> benching will be done as necessary to allow access for quarry equipment for stripping, drilling and <br /> blasting of overburden and gypsum. Additional benching will be done when necessary to minimize safety <br /> hazards associated with falling rock from highwalls. <br /> 7. The existing ranch road which passes by the current quarry operation will continue to be used as the <br /> access and haul road, with short spur roads built to reach other gypsum <br /> deposits as necessary.The spur roads will be reclaimed when no longer needed for mining:the ranch <br /> road will remain. <br /> 8. No toxic or acid-forming materials will be exposed during extracting operations. All waste rock, <br /> including overburden, will be stored away from surface drainage ways and stabilized to minimize erosion <br /> and off-site wind or water deposition. <br /> 9. No chemicals will be used on site except for normal petroleum, oils and lubricants for vehicles and <br /> equipment, water and dust suppressants for dust control. <br /> 10. Dust suppressants(including but not limited to magnesium chloride brine, lignin sulfate and other <br /> accepted agents) and water will be used for dust control as needed. Water will <br /> be imported to the site via water truck. <br /> 11. A portable chemical toilet and other sanitary and safety equipment and facilities will be located on <br /> site and moved as needed to support the operation. Pumping and maintenance will be contracted out: <br /> human waste and ordinary solid waste will be disposed of off-site. No other structures, including ditches, <br /> buildings, or impoundments except those required for storm water control and protection of danger and <br /> reclaim areas are anticipated to be placed. <br /> 12. Total disturbed land not backfilled,graded, contoured and reseeded will not exceed"15 acres, <br /> including non-permanent haul roads, stockpiles, and plant sites. <br /> Calarada Lien Pete Lien &Sons, Inc. 10/26/2023 <br /> Permit Conversion Application: Munroe Quarry CL-MQ-AP-11-001-0995 <br />