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EXHIBIT D - MINING PLAN <br />GENERAL CONCEPT: <br />Site description: <br />Terrain: The site consists of the eastern side of the Mud Creek valley and the bench <br />to the east of Mud Creek and south of unnamed tributaries of Mud Creek, originally <br />cut from east to west by a number of shallow natural drainage swales. See Map C-3 <br />for current contours, from USGS map and estimated from aerial photos and site <br />inspection. <br />Geology: The site consists of quaternary sand and gravel on the sides and top of the <br />bench, resting on top of the Mancos shale. <br />Existing Workings and Features: Approximately 46 acres of the existing 60-acre <br />permit are have been affected, and a total of 57 acres, including 11 acres of pre- <br />law mining (not yet effected post-law, in 2010), has been affected on the property. <br />Current and Proposed Operations (Maps C-3, C-4): <br />Method of mining: Open pit. Shovel, loader, and truck. <br />Estimated depth of operations: Mining will not be done into the shale. Adequate <br />overburden (minimum 6-12 inches) will be left above the shale or placed to support <br />equipment, provide a rooting zone above the shale, and to protect against erosion <br />of the shale by water, releasing salts. (See Exhibit E for detailed information.) <br />A total of approximately 86 acres will be affected and mined, or 68% of the <br />total site/permit area. 40 acres will not be affected. Mining will continue to be <br />limited to ten acres at any time, per county and CDOT permitting limits. <br />Areas which will NOT be mined (Map C-3): <br />1. Buffer zone of 110 feet on south and 200 feet on part of the east edge <br />of property (outside the permit boundary). <br />2. Areas where shale bedrock is exposed or is the surficial geology. <br />3. Most areas with pinyon-juniper association savannah (treed areas) <br />and lower elevations within the permit boundary. <br />4. Areas where it is necessary to protect drainages, springs, ponds, or <br />prevent discharges (per surface water management plan). <br />Use of areas after mining (before reclamation): Up to 10 acres of land will be used <br />for processing plants (screening, crushing, and wash plants) and for hot-mix asphalt <br />facilities. Additional areas will be used for stockpile of pit run, product, overburden, <br />soil, and water areas (ponds and detention/retention basins) and controls. <br />Protection and storage of soil: As much as possible, soil will be moved directly from <br />areas being stripped to areas ready for soil to be replaced; final areas to be mined <br />will have soil which has been protected in longterm stockpiles. When soil cannot be <br />immediately used, it will be placed in stockpiles immediately adjacent to areas <br />where it is to be placed for final reclamation. <br />Removal and storage of overburden: As much as possible, overburden will be <br />moved directly from areas being stripped to areas ready for permanent placement <br />of overburden to be immediately brought to final grade and covered with soil; <br />Exhibits for 112(c) AM-02 Application -M-1994-108-2010- Page 13