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1 12 APPLICATION PAGE 10 OF 35 <br />. (e) An approximate timetable to describe the mining operation. The timetable is for the purposes of <br />establishing relationship between mining and reclamation during the different phases of the mining <br />operations. An Operator shall not be required to meet specific dates for initiation, or completion of <br />mining in a phase as maybe identified in the timetable. This does not exempt an operator from <br />complying with the performance standards stated of Section 3.1. Such timetable shall include: <br />• An estimate of the periods of time which will be required for the various stages of the operation; <br />• A description of the size and location of each area to be worked during each phase; and <br />• Outlining the sequence in which each stage or phase of the operation will be carried out <br />Mining for the sand and gravel will be progressive across the site, as discussed in <br />part (a) above. As mining operations progress across the permit area, backfilling <br />operations will be following behind the active sand and gravel high wall. Once <br />backfill has reached the site reclamation plan elevations, the area will be made <br />available for material stockpiles and processing, or, if the area will not longer be <br />needed, it may be tilled, topsoil replaced, mulched, seeded and fertilized. <br />Topsoiling, mulching, seeding and fertilizing will begin in areas within the permit <br />boundary which will no longer be disturbed, the applicant may till, mulch, seed <br />and fertilize these areas. <br />Also discussed above, the topsoil will be stripped from areas before surface <br />disturbance activities occur. The maximum area for topsoil stripping shall be 32.5 <br />acres. <br />• 69 Nature, depth, and thickness of the deposit to be mined and the thickness and type of overburden to be <br />removed; and Nature of the stratum immediately beneath the material to be mined in sedimentary <br />deposits. <br />Overburden material within the project site is approximately one foot deep. The <br />top two to six inches of existing topsoil material will be stockpiled and reused for site <br />reclamation work. <br />Approximately six feet of sand, gravel and cobble material is located under the <br />overburden material described above. This material will be extracted and <br />processed. In general, the upper portion of this lens contains more fine-grained <br />sand material. Cobbles within the lens are anticipated to range in size up to five <br />inches in diameter. <br />Below the sand and gravel lens is weathered siltyclay Mancos Shale, which is <br />considered bedrock in this portion of Mesa County. Mancos Shale is a dark gray- <br />to-gray block, thin-bedded to laminated shale with interbeds of siltstone and <br />sandstone. <br />0