2020-06-16_PERMIT FILE - M2020007 (7)

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EXHIBIT D MINING PLAN (CONT) SOIL UNIT NAME APPROX DEPT OF DEPTH OF UNIT AREA TOPSOIL, OVERBURDEN (AC) (INCHES) (INCHES) 1 Altvan loam, 0 to 1 percent slopes 265.7 10 25 2 Altvan loam, 1 to 3 percent slopes 93.3 10 24 3 Aquolls and Aquents, gravelly 198.7 12 36 substratum 10 Ellicott-Ellicott sandy-skeletal complex, 23.8 0 0 0 to 3 percent slopes, rarely flooded 16 Colby loam, 3 to 5 percent slopes 10.7 7 36 21 Dacono clay loam, 0 to 1 percent 23.7 12 36 slopes 22 Dacono clay loam, 1 to 3 percent 20.4 12 36 slopes 38 Nelson fine sandy loam, 3 to 9 percent 0.0 9 NA slopes 42 Nunn clay loam, 1 to 3 percent slopes 0.2 9 NA 53 Otero sandy loam, 3 to 5 percent 45.0 12 36 slopes 76 Vona sandy loam, 1 to 3 percent 0.1 6 NA slopes Based on the soils report and on site observations there are sufficient quantities of soil available to reclaim the disturbed lands to their present condition. The excess overburden will be placed into the five (5) settling ponds/overburden backfill Phases shown on the MAP EXHIBIT C-1 - MINING PLAN MAP, or removed from the site . The soils on the permit area that will be salvaged and replaced should be capable of growing vegetation consistent with what is required by the Reclamation Plan. The average depth of topsoil on the site according to the NRCS report and site investigations is 0 to 12 inches deep. Enough topsoil will be retained to place an average of 6-12 inches on the areas to be revegetated. As each area is stripped, L.G. Everist will determine how much soil will be needed to reclaim the area and it will be stockpiled for use in reclamation. Over the life of the mine, an estimated 816 , 000 yards of topsoil will be stripped from the mined area but, a minimum of 241, 500 yards will be retained for resoiling the areas to be revegetated. In addition, there is from 0 to 3 feet of overburden on most of the site . Much of this overburden will be retained and used to backfill the areas shown on the maps or removed from the site. The topsoil and overburden stockpiles will be located around the excavation, typical piles in possible location are shown on the MAP EXHIBIT C-1 - MINING PLAN MAP. If the soil stockpiles remain undisturbed for more than one year, a cover crop of the approved seed mix, at the rate called for in the Reclamation Plan, will be used to revegetate them. L.G. Everist, Inc- Ragsdale Reservoirs June 11, 2020 D-4