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requirement to provide six inches for rooting zone/soil on reclaimed areas, it is <br />estimated that only acre-feet of a required acre-feet of soil (44%) will be <br />available for final reclamation, <br />4. Overburden (clay and loam) varies significantly, but is assumed to occupy <br />about 10% of the profile, or 5 feet out of an average 50-foot profile to be <br />mined, but is expected to be found throughout the profile, in lenses of aolian <br />deposits (estimated 200 acre-feet). Part of this (estimated at 20%, or 40 acre- <br />feet) is expected to be suitable, with proper handling, for rooting zone <br />material to supplement soil. <br />5. Sand and gravel deposit ranges from 15 to 60 feet in depth, including pre-law <br />disturbed areas, and averages 45 feet in undisturbed areas, subtracting clay <br />and loam lenses. <br />6. Excavation will be above the water table. <br />7. The top of the Mancos shale dips to the west (towards the creek). <br />STRIPPING AND MINING TECHNIQUE: <br />STRIPPING: Soil, and overburden (subsoil and pockets of loam, silt and clay) is <br />expected to be quite variable, as defined by standard NRCS methods. Following <br />grubbing of any woody species (most treed areas will not be mined), the soil (where <br />present), with grasses and forbs, will be stripped using scraper, dozer, and/or <br />loaders. Soil may be screened to remove roots and larger materials for processing <br />and sale or use, and to improve use for reclamation. <br />After screening, soil will be placed in a stockpile at convenient locations for <br />long-term storage and protection of soil, or moved to directly to reclaim areas. <br />(when necessary very short-term (4-6 month) stockpiles may be placed on the pit <br />floor before moving to reclaim areas. Suitable overburden (item #4 above: clay, <br />loam, silt) will also be identified and stockpiled separately to be used for rooting <br />zone material to make up part of the known shortage of soil. <br />In general, the stripping will be done on a yearly or biannual basis. <br />MINING: Mining will be normally conducted in one to two cuts, each not exceeding <br />30 feet in depth. Exact depth will vary based on previous (pre-law) mining, depth of <br />shale basement rock, and to ensure proper drainage, convenient reclamation to an <br />acceptable slope, and to allow for storm water control during and after mining. No <br />excavation into groundwater, and no dewatering is anticipated. Mining will not be <br />done where impact on existing springs and ponds would likely result. Excavation will <br />be done using loaders or backhoes/backhoes, and either taken by loader directly <br />to a plant or plant stockpile, or loaded into trucks for transport. During mining, <br />overburden (clay, loam, silt, etc.) will be separated and relocated to backfill areas <br />or stockpiles, with segregation and use as discussed above. <br />Processing of excavated material will vary based on customer needs, but <br />may include screening , crushing, and/or washing of sand and gravel (using <br />portable plants), moving these to stockpiles in the plant area prior to use in on-site <br />plants (such as ready-mix or hot-mix plants) or shipping from the site without <br />processing. <br />Excess materials (including fines and oversize rejected during processing) will <br />be moved to backfill areas (preferred) or stockpiles (alternate) by loader or loader <br />and truck. <br />Exhibits for 112(c) AM-02 Application -M-1994-108-2010- Page 15