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i <br />routed through Coyote Dam (MapM51). Water levels in Coyote Dam wi1L be main- <br />tained to give adequate stn rage for a 10 year-24 hour event and the pumping of <br />Cult Pit. <br />Fig. 2-1 illustrates the volume calculations for Cu yote Dam based on maximum <br />pumping activities. This assinnes two 300 g/m pumps, worked five days per <br />week, twenty four hours per day. <br />Fig. 2-1. Volume Calculations for Coyote Dam. <br />Total Runoff Volume: 9.86 ac-ft <br />(10-yr. 24-hr. event) <br />Pumping Volume: <br />(2 pumps)(300 gpm/pump)(0.1337ft3)(ac-Et )(60 min/hr)(24 hr/day)(5 days) <br />gallon 43560ft3 <br />= 13.26 ac-ft <br />Total required capacity = 22.52 ac-ft <br />Capacity at 6305 ft. (upper gate valve elevation): 49.63 ac-ft <br />Required additional capacity: 22.52 ac-ft <br />Total Capacity: 72.15 ac-ft <br />ld.S. Elevation at total capacity: 6308.0 ft <br />Crest of emergency spillway elevation: 6313.0 ft <br />Freeboard: 5.0 ft <br />As shown by the above calculations, Coyote Dam has sufficient capacity to <br />impound water from five days of pumping along with total runoff volume from a <br />10 yr., 24 hr. precipitation event. This volume can be impounded while <br />retaining five feet of freeboard to the crest of the emergency spillway. <br />We estimate that it will take six to eight weeks to pump Colt Pit dry. <br />cont. <br />