Laserfiche WebLink
<br />45 6.0 18.5 245 <br />46 3.0 20.5 23.5 <br />Average 4.3 20.1 24.4 <br />Since Area 2 is 34.67 acres in size, an average depth of 4.3 feet yields 240,500 cy of <br />soilloverburden. Part of the overburden and topsoil from Area 2 will be backfilled in part of Area 1 <br />to create a) 3h:1 V sideslopes around the lake and b) provide a peninsula of land that will later be <br />used for industrial use. See Map F for the location of this piece as well as all other pieces of land <br />created in this manner. In order to make these pieces usable, the land level must be raised above the <br />100 yeaz flood level, which is 4466' to 4467' above sea level at this location. <br />The remainder of the soil and overburden will be used to backfill the slopes of Area 2 and provide <br />Fill for some azeas that will be made into land pazcels after reclamation. <br />During the mining of Areas I and 2, the Grand Junction Drainage District return irrigation water <br />• will be channeled into the middle ditch as shown on Map C-2. Once Area 2 is mined out, a series of <br />3 - 4' diameter culverts will be placed under the Excel Energy/Westem Slope Gas easement be- <br />tween Areas 1 and 2. The irrigation water will then be fed into the lake made from excavation in <br />Mining Area 2. This water will flow through the culverts and flow to the lake in Mining Area 1. At <br />this time, the sediment pond may not be used. A dike will be cut from the Area I lake to the origi- <br />nal drainage leading to the Colorado River. This dike will have a large dischazge gate that can be <br />shut if needed, effectively making both lakes a large sediment pond. When topsoiVoverburden <br />stripping of azeas 3, 4 and 5 occurs, one or more of these lakes may be temporazily drained to allow <br />the construction of the land azeas. Water from this pumping, as well as return water from the irriga- <br />tion canal, will be redirected to the sediment pond. <br />Topsoil and overburden stripping will then take place in Area 3. The table below shows the drill <br />data and average thicknesses for Area 3: <br />15 Road Pit 10/02 10 <br />