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• <br />Phase 1 is approximately 17,2 acres in size, and consists of the eastern half of the project site, and <br />Phase 11 is approximately 15.3 acres in size, and consists of the western half of the site. During <br />sand and gravel mining, approximately 5 acres will be mined at any one time. <br />Overburden soils will be removed and stockpiled adjacent to the excavated area, or used as <br />backfill material for the previous mining area. The sand and gravel will be mined using <br />trackhoes, front-end loaders, and bulldozers. Processing [he sand and gavel will consist of <br />screens and crushers located neaz the center of the project area. Once the materials are processed, <br />they will be stockpiled onsite or loaded into trucks and trucked offsite. After all the sand and <br />gravel has been removed, the area will be backfilled and compacted using the stockpiled <br />overburden material, the overburden from the next mining area, and imported fill materials. The <br />area will be 6ackfilted to the approximate original site grades. <br />()7 Nature, depth, and thickness oj[he deposit to be mined and the thickness and type ofoverburden to be <br />removed; and Nature oj[he stratum immedralely beneath the maters! to be mined in sedimentary <br />deposits. <br />Overburden material within the project site is approximately 12 feet deep. According to the US <br />Department of Agriculture, Department of Natural Resource Conservation Service (NRCS), the <br />overburden soil consists of a silty clay loam that is not suited for cultivation due to high salinity <br />levels. Vegetation on the project site consists of tamerisk, greasewood, and halogeton. These <br />plants are listed on the State of Colorado's noxious weed list. There is no topsoil on the project <br />site that is suitable for plant growth medium. Therefore, no special provisions will be made to <br />separate "topsoil" materials from the remaining overburden soil. <br />A 10-ft to 20-ft lens of sand ,gravel and cobble material is located under the overburden material <br />described above. This is the material that will be extracted and processed. (n general, the upper <br />portion of this lens contains more fine-grained sand material. Cobbles within the lens are <br />anticipated to range in size upto sixteen inches in diameter. <br />Below the sand and gravel lens is a weathered silty clay Mancos Shale, which is considered to be <br />bedrock in this portion of Mesa County. Mancos Shale is a dark gray to gray block, thin-bedded <br />to laminated shale with interbeds of siltstone and sandstone. <br />(g) Identify the primary and secondary commodities to be mined/eztracted and describe the intended use; <br />and <br />The primary and secondary commodities are sand and gravel which will be used for construction <br />materials. The overburden soils will be used, along with imported materials, for backfill on the <br />project site. <br />(h) Name and describe the intended use of all ezpected incidental products to be mined/extracted 6y the <br />proposed operation. <br />No incidental products will be mined, processed, or extracted . <br />