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20.0 REVEGETATION <br />20.1 DESCRIPTION <br />This specification covers preparing the areas for seeding, furnishing seed, (if required), <br />furnishing fertilizers, mulch and/or mulch stabilizers on all areas disturbed by the <br />CONTRACTOR during project work or areas designated in the Special Conditions to be <br />revegetated. The CONTRACTOR is responsible for revegetating all areas disturbed during <br />installation of closure elements, or during backfilling of a mine opening or other reclamation <br />work. Revegetation must be factored into the bid for closure of each opening/area, unless a <br />specific bid item for revegetation is included in the bid. <br />20.2 MATERIALS <br />Seed <br />The CONTRACTOR must give the PROJECT MANAGER at least two (2) weeks notice of the <br />acreage to be seeded, so the PROJECT MANAGER can deliver the proper amount of seed. <br />Fertilizers <br />Commercial Fertilizer. Fertilizers shall be commercial grade diammonium phosphate (18-46-0) <br />and free flowing, suitable for application with hydraulic- or pneumatic-type equipment or <br />fertilizer spreaders and conforming to applicable Colorado State Fertilizer laws. Caked or <br />lumpy fertilizer will not be accepted. The CONTRACTOR shall furnish a supplier's certificate <br />of analysis and weight. All fertilizer shall be in a form readily available to plants. Commercial <br />fertilizer shall be applied at the rate of 300 pounds per acre. <br />Mulches <br />Mulch shall consist of hay or straw mulch, pest-free or weed-free to the extent possible. <br />Approximately 30 percent by weight of the mulch material shall be ten inches (10") in length <br />or longer. Rotted, caked, decayed or moldy material will not be accepted. Hay or straw <br />mulch shall be applied uniformly at the rate of two (2) tons per acre. Hydromulch shall be <br />applied at the rate of one and a half (1 1/2) tons per acre. <br />20.3 EXECUTION <br />The CONTRACTOR shall give the PROJECT MANAGER at least two (2) days notice of the <br />time and place of starting his revegetation operations and shall continue to advise as to the <br />schedule of operations. Revegetation may take place at the completion of work at an <br />individual opening if the CONTRACTOR so desires. <br />Fertilizers <br />Immediately prior to seedbed preparation, fertilizer shall be uniformly applied over the areas <br />designated for seeding and immediately incorporated into the soil by tilling methods as <br />discussed below. Commercial fertilizer shall be applied at the rate of 300 pounds per acre. <br />16