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Specifics regarding Platte Canyon Reservoir include: <br />• 957 ac-ft total capacity <br />• Maximum surface area of 58 acres <br />• 52 ac-ft dead storage <br />• 905 ac-ft active storage capacity used by Denver Water <br />• This reservoir could be modeled in aggregate with Marston Reservoir to simplify <br />representation of off-channel storage associated with Denver Conduit No. 20 <br />HydroBase Data <br />The data available in HydroBase for the 1950 to present period pertaining to Denver Conduit No. <br />20 include the following: <br />Total River Diversions <br />• Complete record 1950 to present (see Figure 12) <br />• Historical diversions average about 80,000 ac-ft/yr over the 1950 to present period <br />• Annual deliveries typically occur year-round with maximum diversions during the spring <br />runoff period <br />• Historical diversions through Denver Conduit No. 20 dropped in the early-1980s when <br />Strontia Springs Reservoir and the Foothills Water Treatment Plant came online <br />Figure 12 <br />Denver Conduit No. 20 Monthly Diversions <br />20,000 <br />,~-, 16,000 <br />w <br />0 <br />12,000 <br />A <br />~ 8>0~ <br />4,000 <br />0 <br />O M lp Ol N V7 00 ~ l~ O M ~O Ol N V7 00 ~ <br />V7 V7 V7 V7 lp lp lp l l l 00 00 00 00 01 01 01 O O <br />ti ti ti ti ti ti ti ti ~ ~ ~ ti ~ ti ti ti ti ti ti <br />Denver Water Board Operating Memorandum 22 of 40 <br />