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• The signs serve es continuing reminders to personnel that stockpile areas are to be <br />preserved and undisturbed. <br />A self-contained V-ditch or berm will be constructed around the perimeter of the <br />stockpile, when necessary, to prevent loss of the soil resource (see Sediment and Water <br />Control Facility Plan section of Tab 13). The berms, ditches, and sediment traps will <br />typically be used when stockpiles are located on steep slopes, where vegetation <br />establishment is delayed, or where runoff form the pile is not routed through a sediment <br />pond. <br />Any soil stockpile which Will remain in place less than 90 days will not be revege[ated. <br />The surface of each pile will be left in a roughened condition to retard wind and Water <br />erosion. <br />Any soil stockpile which will remain in place 90 to 180 days will be stabilized by <br />utilizing an annual grain (wheat or barley) cover crop. The seeding rate and method is <br />described in Tab 22, Revegetetion Plan, Seed Mixes and Planting Lists section. <br />• f <br />P <br />t <br />ti <br />d <br />i in when a stock <br />ile is <br />"l <br />ill be <br />-t <br />" <br />il <br />t <br />k <br />il <br /> ro <br />ec <br />on an <br />ntenance o <br />ma g <br />ong <br />erm <br />so <br />s <br />oc <br />p <br />es w p <br /> temporarily or fully completed and no more additions or withdrawals of soil are to be made <br /> within a 780 day time period. Soil stockpiles will be stabilized primarily by perennial <br /> plant establishment. The seed mixture, seeding method, and seeding rate for Long-term <br />soil stockpiles is described in the Reveg et ati on Plan, Tab 22, Seed Mixes and Planting <br />Lists section. <br />Establishing vegetative cover will aid in overall stabilization and erosion control of <br />stockpiles. Yegetative cover will aid in reducing runoff and raindrop impact and will <br />increase moisture infiltration by maintaining the upper soil surface in a friable, <br />noncrusted condition. Organic matter, soil nitrogen, and micro-organism activity will be <br />maintained or enhanced by the seeding of deep rooted species or species with fibrous root <br />systems. <br />The height of stockpiles will be restricted to less than 20 feet, when possible, to <br />prevent excessive wind erosion, soil compaction, end anaerobic reducing conditions at the <br />• stockpile bases. <br />21 <br />