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Mr. Jared Ebert <br />June 22, 2010 <br />Page 4 <br />6.4.5 EXHIBIT E - Reclamation Plan <br />CIVIL RESIDURCES <br />15) The reclamation plan states the embankments will be up to 40 feet in height, however the mining plan and the <br />Exhibit C maps indicate the embankments will be 30 feet in height, please clarify. <br />The dam embankment heights vary around the perimeter of each cell. The following table summarizes the <br />maximum jurisdictional dam height of each cell: <br />Jurisdictional <br />Cell I.D. Height (ft) <br />A 27.0 <br />B 27.0 <br />C1 37.0 <br />C2 27.0 <br />D1 33.0 <br />D2 29.0 <br />16) Around the perimeter of where the overburden is designated to be stripped (the grey area on the Exhibit C map) <br />please indicate what horizontal to vertical slope ratio will be left in place. Also, this slope must be displayed <br />accurately on the Reclamation Plan Map. <br />No overburden borrow slopes will be left in place outside of the cells. Areas proposed for borrow of overburden <br />will be reclaimed as shown by the proposed grades included on Exhibit F - the Reclamation Plan Map. <br />17) How will the designated floodway be impacted by excavating overburden directly adjacent to its boundary? It <br />would appear this could change/impact the course of the floodway. Please explain? <br />The floodway is not impacted by the proposed overburden borrowing outside of the floodway. Erosion protection <br />measures including buried riprap dikes, riprap lining of the fill toe (in areas) and installation of Pyramat geotextile <br />are proposed along the edge of the floodway. Refer to Attachment D - Permanent Erosion Control Plan. <br />18) The embankment diagrams depicted on the Exhibit C map indicate various depths overburden and topsoil will be <br />placed on the exterior slopes of the embankments. First, overburden should not be mixed with the topsoil. The <br />current approved reclamation plan calls for the placement of 6" of topsoil at a minimum over the affected lands <br />designated for revegetation. Overburden will need to be placed prior to and separately from topsoil. The "Dam <br />Typical Section A" diagram indicated 4-6 inches of overburden and topsoil will be placed on the exterior of the <br />embankment. Please correct the diagram to indicate 6" of topsoil will be placed on the exterior to the <br />embankment slope. Also, the "Dam Typical Section B" diagram indicates the top layer of material placed on the <br />exterior slope of the embankment will be made up of 6" of overburden/topsoil. Please correct this to indicate that <br />6" of topsoil will be placed on the exterior slope of the embankment. <br />Six inches of topsoil has been designated and indicated on Typical Dam Section A on the Reclamation Plan <br />Map. We agree that overburden is a different material and we intend to use this as Zone 1 material in the dam <br />embankments.