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3,500 ac-ft minimum operational pool due to water quality concerns associated with pipeline <br />deliveries from Ralston Reservoir to City of Arvada water treatment plant <br />Outlet capacity of about 477 cfs <br />Seepage losses from Ralston Reservoir are estimated to be minimal <br />An elevation-area-capacity table for Ralston Reservoir was provided by Denver Water, as <br />summarized in Table 2. <br />Table 2 <br />Elevation-Area-Capacity Data <br />Ralston Reservoir <br />Description Elevation Area Capacity <br />(feet msl) (acres) (ac-ft) <br />Dead storage level 5,915 4 27 <br /> 5,925 17 145 <br /> 5,935 25 357 <br /> 5,945 37 669 <br /> 5,955 48 1,094 <br /> 5,965 61 1,640 <br /> 5,975 74 2,311 <br /> 5,985 87 3,117 <br /> 5,995 99 4,045 <br /> 6,005 110 5,091 <br /> 6,015 122 6,258 <br /> 6,025 137 7,553 <br /> 6,035 152 9,005 <br /> 6,040 160 9,784 <br />Normal High Water Line (spillway) 6,046 172 10,776 <br /> 6,050 179 11,477 <br /> 6,055 188 12,389 <br />Dam Crest 6,060 n/a 13,200 <br />Source: Denver Water <br />HydroBase Data <br />The data for the 1950 to present period of record pertaining to Ralston Reservoir include the <br />following: <br />End-of--Month Contents (see Figure 6) <br />• End-of--month contents missing for all or portions of water years 1950 to 1958, 1973, <br />1976, 1977, 1989, and 1991 along with sporadic months missing in other years. Denver <br />Water provided a complete set of end-of--month storage contents data for Ralston <br />Reservoir. These data have been forwarded to the DWR database administrator for <br />inclusion into HydroBase, and are included in Figure 6. <br />Denver Water Board Operating Memorandum 11 of 40 <br />