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<br />, <br /> <br />. <br /> <br />. <br /> <br />REVIEW ANALYSIS <br /> <br />Lake Minnequa <br /> <br />. <br /> <br />The Lake Minnequa drainage basin was separated by the U.S. Army <br /> <br />Corps of Engineers (COE) into several sub-basins. <br /> <br />Point <br /> <br />.- <br /> <br />discharges at four concentration points were computed using the <br /> <br />publication "Manual for Estimating Flood Characteristics of <br /> <br /> <br />Natural Flow Streams in Colorado, Technical Manual Number 1". <br /> <br />. <br /> <br />Storm hydrographs were developed using a mass curve constructed <br /> <br />from two nearby basins (35 miles away) Frijole Creek and Apishapa <br /> <br />River and rainfall values from TP-40. Basin characteristics used <br /> <br />. <br /> <br />to compute excess rainfall and unit hydrograph parameters are <br /> <br />unknown and unavailable for review. <br /> <br />The resulting runoff <br /> <br />hydrographs were adjusted by the COE (method unknown) so that the <br /> <br />. <br />, <br />I <br /> <br />peaks matched the results of the TM-l analysis. <br /> <br />The resulting <br /> <br />combined inflow hydrograph to the lake is unavailable however the <br /> <br />peak discharge was in excess of 7000 cfs. <br /> <br />The COE routed the <br /> <br />. <br /> <br />inflow hydrograph through the lake and calculated the outflow <br />hydrograph with a peak discharge of 6700 cfs. The COE floodplain <br /> <br />. <br /> <br />delineation downstream of the lake was developed by calculating <br /> <br /> <br />typical street capacity and the depth of water for a peak flow of <br /> <br />6700 cfs. <br /> <br />. <br /> <br />-2- <br /> <br />. <br />