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• All water used at the plant site will be consumed or evaporated. <br />No discharges will be made into Parachute Creek. <br />During the construction phase of the project it is estimated <br />that approximately 1200-1600 acre-feet of water will be required. <br />This water will be used for production of concrete, cleanup <br />activities, construction labor force consumption, etc. This <br />water consumption will be spread over the 48 month construction <br />schedule. <br />WATER REQUIREMENTS FOR REVEGETATION <br />Revegetation of processed shale will require the supplemental use <br />of water for leaching, seedling emergence and stand establishment. <br />This is necessary even though the disposal site is located at <br />the 8,000 to 8,300 foot elevation level and will be covered with <br />• topsoil. Reasons for supplemental water use are the saline, fine <br />textured and low available moisture traits of the processed shale. <br />Revegetation of disturbed areas other than the disposal area will <br />not require supplemental irrigation. Topsoils in the area are of <br />good quality, both texturally and nutritively, and in combination <br />with subsoils and an estimated annual precipitation of 18 inches <br />(Wymore, 1973) should readily establish and support a plant cover <br />consistent with present ecological conditions of the area. <br />Processed shale revegetation water requirements are based on <br />research conducted by Colony Development Operations and discussed <br />in this paragraph. To ensure successful revegetation, it is <br />assumed that the revegetation program will include: (1) preplan- <br />ting leaching with approximately 40 inches of irrigation water; <br />(2) fall or spring seeding of adapted species with supplemental <br />irrigation for germination, establishment, and growth for the <br />first full growing season; (3) necessary reseeding, or planting <br />G-32 <br />