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<br />~J <br /> SBMIBIT 8 <br /> RECLAHATIOR PLAA <br /> The proposed recl amation of the Ninkler Quarry will be for <br /> rangeland as it is currently being utilized. The net result of <br /> mining will be to lower the top of the mesa from 10 to 20 feet. <br /> The net effect of this lowering will be barely visible to the <br /> surrounding area. Mining will not be done at the edge of the <br />' upland. A 3:1 h orizontal:vertical slope down into the pit <br /> setback from the edge of the mesa will leave the visual <br />' impression that the upland has been untouched. <br /> Reclamation will be done concurrently with the mining operation. <br /> Backfilling with ov erburden and topsoil will begin as each mining <br /> phase is completed. Final grading and shaping of slopes will be <br /> done immediately. Reseeding will be done either in early spring <br /> or late fall to al low maximum germination of the seed mix. A <br /> second reseeding will be done one year later on areas where <br />' seeding has failed to take hold. <br />Overburden and topsoil will be stockpiled separately. <br />Erosion control will be a very important part of reclamation work <br />throughout the life of the operation, affecting water quality, <br />' soil quality, revegetation, grading, and slope stability. <br />Following is a list of reclamation and erosion control techniques <br />available for use: <br />Contour Ridging <br />This technique employs a plow or disk to create a series of <br />trenches running perpendicular to the slope. The trenches reduce <br />slope length by catching and holding water, thus allowing it to <br />percolate into the slope. Spacing between the trenches and <br />' trench depth depends on the form of equipment used. Nind erosion <br />can also be reduced by contour plowing. The eoisture holding <br />capabilities of the ridging encourages seed germination. <br />' Diversion Terrace <br />A diversion terrace is a channel with a supporting ridge on the <br />' lower side constructed across the slope. It is used to reduce <br />slope lengths, break up concentrations of runoff, and to move <br />water to stable outlets at a non-erosive velocity. Channel <br />grades may be variable, with the allowable velocity for the soil <br />type and vegetative cover determining maximum grade. Haximum <br />channel side slopes for temporary diversion are 1:1 and 3:1 for <br />permanent ones. <br />E-1 <br /> <br />