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<br />Step=_ to ke-e5tabli5h An Adapted Vegetative Cdver: <br />If mining will be done over a prolonged period of time. procedures for <br />re-vegetation should start immediately after each segment of the are?. i=_ <br />mined out. This to prevent natural re-invasion by undesirable plants <br />such as three-awn and 5leepvara=_s. <br />Anv reuseable topsoil material at the mining site will be saved and <br />stockpiled separately away from the mining location. <br />1. Site preparation - After removal of the gvosum the mined "floor" of <br />the pit should be chiseled or scarified 3-4" deep to break up an.• <br />slid: hard pan condition and allow a better bonding of added topsoil <br />with the substrate. Side slopes into the pit should be tapered to <br />4:1 or less to reduce erosion and allow for drilling. <br />2. Apply topsail - The fine gvosum screenings will be stockpiled at the <br />site. Screenings will later be missed with an equal amount of good <br />soil material hauled in from off site. Since the gypsum screening=_ <br />will be quite sterile, it i5 important that good quality soil be <br />added to provide a reasonably good seeding medium. This sail should <br />free of noxious weed Seed. <br />Manure - Uairv manure, at least B tons per acre, will also be hauled <br />in and well mixed with the soil before seeding. The manure should be <br />aged or well rotted. No commercial fertiliser will oe needed if an <br />adequate amount of manure is added. The seedbed mi;:ture of <br />screenings. added soil and manure should be at least S-Sn" in depth <br />to assure a reasonable success for the re-seeding. <br />before =_eedinq the site should be double disced to hill sprouting <br />weeds, and harrowed or dragged to provide a firm seedbed. <br />~. Seeding - A drill capable of handling the Seed should be used. The <br />drill should be equipped with a seedbox agitator and press wheels or <br />drag chains to cover the seed. Shallow planting, not over 1/2" deep <br />usually results in the best success. If any areas are so rough as to <br />require broadcast seeding, double the normal amount of seed should be <br />used. <br />kecommended Seeding Mixture - See attached Cu-ECS-` <br />~FCEIV~D <br />AUG 2 91997 <br />ow~s~pn u. wunerals & Geology <br /> <br />