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• 12,003 ac-ft minimum operational pool due to dam safety concerns associated with debris <br />that may be entrained at storage levels below this minimum pool level <br />• 28,987 ac-ft active storage capacity used by Denver Water <br />• Outlet capacity of 500 cfs <br />• Seepage losses from Gross Reservoir are estimated to be minor because of the dam and <br />reservoir location in canyon bedrock <br />An elevation-area-capacity table for Gross Reservoir was provided by Denver Water, as <br />summarized in Table 1. <br />Table 1 <br />Elevation-Area-Capacity Data <br />Gross Reservoir <br />Description Elevation Area Capacity <br />(feet msl) (acres) (ac-ft) <br />Dead storage level 6,989 1 1 <br /> 7,020 10 108 <br /> 7,040 22 433 <br /> 7,060 35 996 <br /> 7,080 51 1,853 <br /> 7,100 68 3,043 <br /> 7,120 87 4,592 <br /> 7,140 112 6,582 <br /> 7,160 144 9,135 <br />Minimum ool 7,178 175 12,003 <br /> 7,180 180 12,358 <br /> 7,200 218 16,321 <br /> 7,220 260 21,094 <br /> 7,240 306 26,754 <br /> 7,260 356 33,367 <br />Normal Hi h Water Line (s illwa) 7,280 408 40,990 <br />Maximum Water Surface Line 7,282 414 41,811 <br />Dam Crest 7,290 439 45,216 <br />Source: Denver Water <br />HydroBase Data <br />The data for the 1950 to present period of record pertaining to Gross Reservoir include the <br />following after it came online in 1955: <br />End-of--Month Contents (see Figure 4) <br />• End-of--month contents missing for portions of water years 1958, 1967, and 1987 along <br />with sporadic months missing in other years. Denver Water provided a complete set of <br />end-of--month storage contents data for Gross Reservoir. These data have been forwarded <br />to the DWR database administrator for inclusion into HydroBase, and are included in <br />Figure 4. <br />Denver Water Board Operating Memorandum 8 of 40 <br />