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Blue Pit 112 Permit Amendment <br />the property. A ramp road to the irrigated pasture will also be installed to allow farm access to the <br />western bottom area. The farm road will be maintained by Western Slope Aggregate until the DRMS <br />bond is released. <br />Irrigation Ditch <br />The Basin Ditch currently (see Map C -i) runs through the proposed expansion area. An agreement <br />has been reached with the ditch company to leave a berm during mining to support the ditch. The <br />berm will have 3H:iV slopes after mining. A cross -over road will be built to provide access across <br />the berm and left after reclamation. The berm and road are shown on Map F. <br />Topsoil Placement <br />The East Topsoil Stockpile currently has 105,881 cubic yards of topsoil in it. The estimated <br />additional topsoil to be removed from Area 1 is 32,380 cubic yards, which is calculated at 1 foot <br />depth over the undisturbed area, which is 20.07 acres. The estimated topsoil to be removed from <br />Area 2 is 1o6,335 cubic yards, which was calculated at 1 foot depth of the entire surface area. The <br />estimated topsoil to be removed from Area 3 is 6,776 cubic yards, which was calculated at 1 foot <br />depth of the entire surface area. The total estimated topsoil to be removed is 145,490 cubic yards. <br />The total overall topsoil (to be excavated and existing topsoil stockpile) is estimated to be 251,371 <br />cubic yards. The estimated topsoil needed to put back is calculated at 1 foot over the entire surface <br />area and is 226,178 cubic yards. The difference is topsoil removed and topsoil to be placed is <br />negligible and will be averaged out over the entire site. <br />Additional topsoil stockpiles will be located at the temporary wash plant location as shown on Maps <br />C -2A and B. This area will be used to temporarily store the topsoil from the expansion area that <br />cannot be directly placed on backfilled areas, Overburden will continue to be stripped in advance <br />of the mining operation. Its thickness varies from 2 feet to 10 feet but it is expected to average 4 feet <br />over the entire expansion area. Since there is a significantly lesser amount of topsoil and overburden <br />compared to gravel, the stripping will only be needed a few days per year. Topsoil will be stockpiled <br />for the initial period until the mining operation has progressed far enough for reclamation to start. <br />This is expected at the end of Mining Area 2. Once areas are ready for reclamation, the stripped <br />topsoil will be directly placed in these areas. Overburden will always be directly placed because <br />there are areas currently ready for overburden placement and this will continue until the end of <br />mining. <br />Wash fines are generated from the washing operation and will continue to be produced. These fines <br />will be placed on the mining slopes along with the overburden to produce the 3H:1V slopes. The <br />amount of material needed to reclaim the slopes to 3H:1V is shown for each mining area on Map C- <br />2. Currently Mining Area 1 has an excess 829,000 tons of backfill material which can be used for <br />backfilling other areas. <br />Import material will also be used in the reclamation process for backfilling slopes. <br />This quantity and cost is addressed in the DRMS reclamation bond. <br />Blue Pit May 2014 E -2 <br />