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that 54,853 cubic yards of topsoil could be salvaged and utilized to cover the disturbance at a 6 <br /> inch depth. <br /> The stockpiles will be seeded and mulched upon completion of stockpile and or windrow <br /> placement. <br /> Vegetation transect surveys determined existing vegetation cover to be 36% based on a point <br /> transect survey conducted in field 1_27_25. Existing vegetation consists of rabbit brush, sand <br /> dropseed, blue grama and kochia. The surrounding area consists of similar rangeland <br /> vegetation combined with riparian vegetation along the receiving water. <br /> �m <br /> 1b 4 <br /> ♦ y <br /> R <br /> Photo: rangeland cover in Jan 2025 typical of the entire pit expansion area. Shrubs are <br /> approximately 12 to 18 inches in ht and dormant primary warm season grass are approximately <br /> 6 inches in ht <br /> Earthwork Phasing and Grading <br /> A contour grading plan of the closure grade indicates slope angles, limits of disturbance, <br /> drainage and access. Based on field observations and site design, it has been determined that <br /> the max slope ratio of pit side slopes will be 3:1. The side slopes of the pit will be topsoiled <br /> (stockpiled above cut slopes), seeded and mulched at approximately 6.8 acres/year over a ten <br /> year period which at the time of pit closure the floor of the pit will be topsoiled seeded and <br /> mulched <br /> Final grading of the pit will maintain a depression with a level bottom(Exhibit C 1 and 2). The <br /> estimated height of the high wall is 50 ft. The topography of the area drains towards the Rio San <br />