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' ra) <br />a~``~ <br />' qr <br /> <br />(Cl <br />i <br /> <br /> <br /> <br />1 <br />1 <br /> <br />1 <br />1 <br />i <br /> <br />t <br /> <br />• -lt- <br />To ._Sot,,,l_ina.: As mining is completed the wall shouldrbe .=,loped <br />2:1 (50°:,l or flatter- depending on equipment scheduled to be <br />..ed during the shaping, top soiling. and harass drilling <br />operatrons. SLopes of 3:1 or fl3ttcer grestly facilitate <br />equipment operation and operator safety. The stockpiled <br />topsoil and supporting horizon(s1 should be enough to cover <br />the shaped borrow :,rea walls. eight to twelve inches (8" to <br />12") or more are needed to provide a suitable growth media for <br />the revegetation planned. <br />Seed m~.x and Rates: <br />+1) Grass seeding planned form CO-ECS'S has been completed <br />and is. in the appendix This form prov~de~. teohnica] <br />data on fertilizer. mulching, and grass variety, specie= <br />planting rate and percent. pf the mix.. <br />(21 Seedbed preparation: <br />The seedbed shall be well settled and firm. but friable <br />enough that seed can be placed at the seed~n9 depths. <br />specified in "Depth of Seeding." The seedbed shall be <br />reasonably free of weeds. Compet.it.lve stand~• ~f weed° <br />that are present before seeding must be controlled by <br />shallow tillage or by application cif herbicides l,~beler' <br />for this purpose. Soils that have been over-comoanted by <br />traffic or equipment, espeotally when wet. should be~. <br />tilled to break up rooting restrictive lavers. and then <br />harrowed. rolled or pac..ked to prepare the requ~rred firm <br />seedbed. <br />(3) Fertilizer re.puirements: <br />(a) All critical area plantings shall bE fertilized <br />unless field evidence or a laborat.orv so+l analvs)°. <br />indreaCes sufficient amounts of nitrogen and <br />phosphorus are present for establishment of <br />vegetation. <br />(b) The rate of fertilizer application shall be no lee-, <br />than 40 pounds of nitrogen (N) and 40 pound e. of <br />phosphate (P205) per acre. Animal manures or <br />simzlar organic material may be used to supply all <br />or part of the ;pecified nutr~ents_ <br />(c) Time of application sha h be immediately prior to <br />seeding. at the time of seeding or ~mrnediatel.y <br />following seeding. as applicable to the kind of <br />fertilizer and type of equipment used. <br />(41 Methods of seeding: <br />(a) Seed should be planted with a drill on all slopes of <br />35 percent (3:1) or flatter The drill must have <br />the capability of handling the kind and ra1.e of scec <br />being planted. <br />(b1 seed mnv be broadcast by hand. by mechanical <br />spreader, or t;v hydraulic equipment on areas that <br />.are small, f,oo steep or not accessible for seed- <br />drill operat.ions:. This specificaticyn does. not. <br />provide for hydraulic application of 5ertl <br />application of weed and rnulch in a single operation. <br />2. <br /> <br />