Laserfiche WebLink
<br />1 <br />Species for use in topsoil and overburden stabilization were <br />' selected by virtue of their early vigor and, in the case of <br />Tegmar Intermediate Wheatgrass and Manchar Smooth Brome, their <br />strong rhizomatous habit. Timothy, although not rhizomatous, <br />is very vigorous and will contribute to soil holding. Barley <br />' will provide the very earliest soil holding and cover. <br />Following cessation of mining and final grading (including <br />' redistribution of overburden), reserved topsoil will be respread <br />at depths from 9 to 15 inches. <br />' FINAL GRADING <br />Following cessation of mining, any working face left at the <br />' time of cessation of mining will be reduced to a slope of <br />3(h):1(v) or less. During periods of low activity in the <br />mining period, the working face slope will be reduced to avoid <br />' safety hazards. <br />As part of regrading, overburden from the overburden stockpile <br />t will be returned to the mined area at depths ranging from one <br />to five feet. Areas of redistributed overburden will be no <br />steeper than 5(h):1(v), except at the working face. <br />' SEEDBED PREPARATION <br />' Following regrading and topsoil respreading, if drill seeding <br />is to be used, the seedbed will be firmed and smoothed as <br />necessary. If broadcast seeding is used, seed will be broadcast <br />immediately after topsoiling because the freshly turned soil is <br />' more receptive to broadcast seed than under any other condition. <br />In the topsoil storage area, after topsoil respreading, the <br />surface will be chiseled, harrowed, and/or firmed to produce <br />' suitable seedbed conditions. <br />SEED MIX <br />Following topsoil replacement, the disturbed sites including <br />the topsoil storage area will be seeded with the seed mix <br />' listed in Table E-2. This seed mix was designed to return as <br />much of the native diversity as practical within the confines <br />of commercial availability of seed. The selected species are <br />' adapted to the relatively dry conditions at the borrow area C <br />site. Three of the currently important shrubs on the site <br />(Artemisia tridentata ssp. vaseyana, Vasey Big Sagebrush; <br />' Chrysothamnus nauseosus, Rubber Rabbitbrush; and Chrysothamnus <br />viscidiflorus, Low Rabbitbrush) are not included in t e seed <br />mix although their return is desirable. It is felt that these <br />' E-3 <br />