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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />MONTH <br /> <br />WEST DIVIDE CREEK, NEAR RAVEN <br /> <br />AVERAGE MONTHLY FLOW <br />(acre-feet) <br />1956 - 1984 <br /> <br />PERCENT OF AVERAGE <br /> <br />ANNUAL FLOW <br /> <br />October <br />November <br />December <br />January <br />February <br />March <br />April <br />May <br />June <br />July <br />August <br />September <br /> <br />158.6 <br />149.9 <br />142.5 <br />130.0 <br />121.7 <br />311.8 <br />2,394.6 <br />11,733.6 <br />7,786.6 <br />1,683.1 <br />261. 8 <br />141.3 <br /> <br />.6 <br />.6 <br />.6 <br />.5 <br />.5 <br />1.2 <br />9.6 <br />46.9 <br />31.1 <br />6.7 <br />1.0 <br />.6 <br /> <br />TOTALS <br /> <br />25,015.2 <br /> <br />The project area is somewhat unusual in the magnitude of the <br />variation in flow from May to August. It is this large variation in <br />monthly flows (! I, 733/261.8 acre-feet) which allows the project area <br />irrigators to benefit from storage. <br /> <br />The <br />the proj ect <br />hydrology. <br />histogram. <br /> <br />USGS and the USBR have been gaging streams in and around <br />area for many years, providing a good record of the <br />A summary of the USGS data is shown on Figure 111-1 <br /> <br />The project area is fed by 8 major drainages. These drain- <br />ages and their approximate drainage area and average annual flows are <br />tabulated below: <br /> <br />DRAINAGE <br /> <br />AREA (sq. mi.) <br /> <br />AVERAGE ANNUAL <br />FLOW (acre-feet) <br /> <br />West Divide Creek (Raven Gage) <br />East Divide Creek (Gage) <br />Yank Creek (Gage) <br />Owens Creek at proposed dam site <br />Beaver Creek (Gage) <br />Mamm Creek (confluence West, <br />Middle, East) <br />Dry Hollow Creek at proposed dam site <br />Alkali Creek (at Highline Ditch) <br /> <br />65 <br />41 <br />27 <br />15 <br />8 <br />50 <br /> <br />22,633 <br />9,103 <br />12,280 <br />7,437 <br />3,780 <br />4,781 <br /> <br />292 <br />1,976 <br /> <br />4 <br />24 <br /> <br />III-3 <br />