2007-12-14_PERMIT FILE - M2007087

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MINING PLAN EXHIBIT D (CONT) topsoil may be used on areas ready for resoiling or placed in topsoil piles around the mine perimeter for use when reclamation begins in the area where it was removed. The rest will be sold or mixed with gravel to make various grades of product. Please see MAP EXHIBIT F -RECLAMATION PLAN MAP for the approximate shape of site when reclamation is complete. The 3 of the 4 landowner water wells will be mined around leaving a 20 foot diameter band of gravel around them. The northern well will remain in its present location while the well head on the central and southern wells will be extended to the top of the fill when reclamation is complete. The 3 wells are in excess of 300 feet deep and will not be impacted by mining activities. The fourth well on the west side will be removed during mining. The material to be mined will be wet so no unusual dust control problems are expected. An estimate of water needs for the mine is outlined in ExHIBITG-WATER. The actual amounts needed will be addressed when we apply for the Senate Bill 120 Well Permit thru the Office of the State Engineer (OSE). Most of the water we use for dust control will be used on haul roads. On a typical operation of this type 3 to 8 ac-ft per year is used. The OSE requires mine operators to use an amount of 4% by weight with the exported gravel. A processing plant will not discharge anything that would affect the surface or ground water quality except dirty water. This water will be directed to the excavated pond and contained on the mining area. The City of Thornton has installed a slurry wall, french drain and a concrete lined water diversion canal along the north and west sides of the property. CAP Land Company has granted an ROW across part of their property for the concrete lined ditch. We have not included this area in the permit. This leaves a band that varies from 5 to 20 feet wide, from the southwest corner to a point on the north line just north of the greenhouse that is CAP's land. With the mining setback this leaves a 30 to 45 foot wide undisturbed area from the edge of the concrete ditch to the dig line. The slurry wall is outside the concrete ditch. Our measurements show that there is minimum of 90 feet between the digline and the slurry wall. To our knowledge mining can take place within 15 feet of a slurry wall and in most cases this happens where a slurry wall is installed around a gravel mine prior to mining. This common practice in the industry has proven the by leaving a stable in situ gravel slope adjacent to the wall 7