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<br />. <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />- 39 - <br /> <br />. <br /> <br />( <br /> <br />TABLE 3 - STRUCTURE DATA <br /> <br />FLOODWATER-RETARDING STRUCTURE <br /> <br />Indian Wash Watershed, Colorado <br /> <br />\ <br /> <br /> . - Structure Number <br /> Item Unit IW-1 <br /> Drainage Area Sq .Mi . 6.53 <br /> Storage Capacity <br /> Sediment Ac.Ft. 570 <br /> Floodwater Ac.Ft. 1,045 <br /> Tot al Ac.Ft. 1,615 <br /> Surface Area <br /> Sediment Pool Acre 43 <br /> Floodwater Pool Acre 90 <br /> Volume of Fill Cu. Yds. 528,587 <br /> Elevation Top of Da~ Feet 4947.0 <br /> Maximum Height of Dam Feet 61.3 <br /> Emergency Spill way <br /> Crest Elevation Feet 4942.0 <br /> Bottom Width Feet 350 <br /> Type Earth <br />~ Percent Chance of Use Percent Less than one <br /> Ave. Curve No. - Condo II 90 <br /> Emergency Spillway Hydrograph <br /> Storm Rainfall (6-hr) 1L Inch 2.70 <br /> Stonn Runoff Inch 1.71 <br /> Velocity of Flow (vc) 11 Ft IS ec ~.1 <br /> Dlscharge Rate 11 C.F.S. 1/ <br /> - Nax. v1;, s. elev. 11 Feet 4936.5 <br /> Freeboard Hydrograph <br /> Storm Rainfall (6-hr) 1/ Inch -- 6.75 <br /> Stonn Runoff Inch 5.60 <br /> Velocity of Flow (vc) 1/ Ft ISec. 3.0 <br /> Discharge Rate 1/ C.F.S. 3,100 <br /> Max. w. s. elev. 1/ Feet 4945.0 <br /> Principal Spillway <br /> Capacity - low stage, rnax . C.F.S. 211 <br /> Capacity Equivalents <br /> Sediment Inch 1.64 <br /> Detention Volume Inch 3.00 <br /> Spillway Storage Inch 1.80 <br /> Class of structure rid' <br /> I <br /> <br />.. <br /> <br />., <br /> <br />L <br /> <br />1/ Maximum during passage of hydrograph. <br />21 After adjustment for area and class of structure. <br />3/ Emergency spillway will not operate during the occurrence of the <br />- emergency spillway flood. <br /> <br /> <br />Date: September 1961 <br />