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FROM GREG-LEWICKI • FRX N0. 3036299335 + Rpr. 19 2©90 63:19PM P2 <br />will serve as continuing reminders to personnel that stockpile areas are to be preserved and <br />• undisturbed. <br />Any topsoil stockpile which will remain in place less than 90 days will not be revegetated. The <br />surface of each pile will be left in a roughened condition to retard wind and water erosion. A self- <br />contained V~itch or berm will be constructed around the perimeter of the stockpile to prevent loss of <br />the topsoil resource. <br />Any topsoil stockpile which will remain in place 90 to 180 days will be stabilized by utilizing an annual <br />grain (barley, oats or wheat) cover crop. The seeding rate will be 70 pound per acre broadcast. <br />Protection and maintenance of "long-term" topsoil stockpiles will begin when a stockpile is temporarily <br />or fully completed and no more additions or withdrawals of topsoil are to be made within a 180 day <br />time period. Topsoil stockpiles will be stabilized primarily by perennial plant establishment using both <br />native and introduced species. The seed mixture, and seeding rate for long-term topsoils stockpiles is <br />described in the Revegetation Plan, Section 2.05.4 (2) (e). <br /> <br />Establishing vegetative cover will aid in overall stabilization and erosion control of stockpiles. <br />Vegetative cover will aid in reducing runoff and raindrop impact and will increase moisture infilVation <br />by maintaining the upper soil surfaces in a friable, noncrusted condition. Organic matter, soil <br />nitrogen, and microorganism activity will be maintained or enhanced by the seeding of deep rooted <br />species or species with fibrous root systems. <br />Topsoil Replaeemerrt. Topsoil will be replaced only when the approved postmine contours are <br />achieved and when no additional disturbance is anticipated. Topsoil will not be replaced on <br />temporary reclamation sRes such as haul road ditches, cut, slopes and fill slopes, pond embankments <br />and spillways, and diversion ditches. Temporary reclamation sites will be seeded and stabilized as <br />described in Section 2.05.3(2)(e) Revegetation. Topsoil will be replaced within the aforementioned <br />areas once final reclamation is achieved. Topsoil shall be replaced along the contour, whenever <br />feasible, to minimize potential erosion and topsoil/spoil intertace slippage problems. This practice will <br />be discontinued on steep slopes where the safety of the equipment operator is in jeopardy. Topsoil <br />which is replaced on mined areas will be scarfied on the contour to a depth of 12 to 24 inches with a <br />chisel plow or ripper. The operation of seed bed preparation will also reduce compaction, increase <br />infiltration, and promote surface roughness. Spoil and topsoil scarification is also discussed in the <br />Seed Bed Preparation section of the Revegetation Plan, Section 2.OS.a(2)(e). <br />(REVISED 2/00) 2.05.4(2)(d) - 11 <br />