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<br />process area. A crossing over the Appleton Drain Ditch will be <br />constructed to allow passage from the subject site to the River <br />Road Pit. This crossing will be constructed to the specifications <br />of the Grand Junction Drainage District, who is the owner of the <br />ditch. Mining operations will then proceed from east to west in <br />increments of approximately 10 acres at a time. <br />As mining proceeds west, the overburden soil will be placed and <br />compacted in the northern half of the excavated area for <br />approximately 3400 feet. (Please refer to the Reclamation Plan Map <br />where this is depicted.) <br />It is estimated that there is overburden soil enough to fill <br />approximately 28 acres of the mined area. <br />The deposit will be excavated to an average depth of 23 feet, of <br />which an average 16 feet is gravel and 6 feet is overburden soil. <br />Excavation will be conducted to produce a 1:1 slope. This slope <br />will then be filled and graded to a 3:1 slope for final <br />reclamation. Backfilling and initial grading of slopes will be <br />done concurrently with the mining process. <br />At the west end of the site is an area approximately 10 acres in <br />size that is not contiguous to the main body of the permitted area. <br />The access to this area from the main pit area will be an <br />intersection crossing of the access road into the wildlife area at <br />approximately the center of the D.O.W. Access Road. This area will <br />be mined in like manner as the larger portion of the site, but will <br />be filled and graded to a 10:1 slope as a final grade in order to <br />accommodate the wishes of the Colorado Division of Wildlife, as <br />addressed in a convent letter dated April 23, 1995. It is the <br />intention of the applicant to dedicate this area to the D.O.W. <br />after mining and reclamation has been completed, to serve as an <br />expansion to the State Walker Wildlife Area. <br />It is anticipated that the life of the mine will be 10 to 15 years, <br />based on current market situations. <br />Underground water is present at approximately 12 feet below <br />existing ground level. This will result in the creation of a water <br />impoundment in the form of a lake approximately 40 acres in size, <br />and a wetlands area in the extreme western portion approximately 6 <br />acres in size. <br />As depicted on the Premining Map, there 1s a drainage easement in <br />the western portion of the site. This easement is now provided <br />with a paved structure to sheet-flow storm water across the site. <br />This paved structure will remain intact until mining reaches that <br />point. At this time the existing structure will be removed and an <br />alternate structure will be constructed to direct storm water into <br />the excavated area where it will be retained until it dissipates by <br />evaporation or percolation. <br />JUN 12 1995 <br />pNiston ~~ Nvne~als 8 Geology <br />