2022-06-16_PERMIT FILE - M2022030

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EXHIBIT C MINING PLAN 1. General Mining Plan The Existing Conditions Map shows the current conditions of the Cheyenne County State Land Board Pit. The pit will serve as a material source, aggregate, borrow and sand, for road construction work on Colorado Project No. NHPP38511-018/23513 to resurface and improve State Highway 385, less than 1 mile from the site. Mining will disturb less than 20 acres delineated on the Mining Map. Mine access is via County Road DD with access from State Highway 385. Mining of the 12-15- foot-thick gravel deposit will progress to the north and west from the site access location and hot plant, stockpile, and processing areas located in the southeast corner of the site. The pit will be regraded to 3H:1 V slopes, or shallower, in a manner that restores the site to its pre-mining drainage pattern. The operation will exist as a long raw material for road base and asphalt is needed for the road construction job. A portable asphalt hot plant will be in the southeastern corner of the site, see Mining Map for location. This area, as well as the stockpile and processing areas, will be prepped by removing and stockpiling topsoil for later reclamation. Mined and processed aggregate will be stored surrounding the hot plant area and the portable processing plant will be located east of the asphalt hot plant and aggregate stockpiles. 2. Mining Timetable The construction project is anticipated to August 2022, depending on weather. Mining is planned to begin August 2022. 3. Mine Facilities and Operation It is extremely unlikely that any toxic or acid-producing materials will be encountered during the mining operation as the site was historically rangeland. However, if such materials are encountered, they will be covered with subsoil and topsoil from onsite stockpiles to the same depths outlined in the reclamation plan and no more mining will occur in the area. No blasting or explosives will occur/be used during mining nor on site.