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<br />LOWER BASIN RESERVOIRS
<br />LAKE MEAD
<br />(COLORADO RIVER)
<br />
<br />
<br />ACTUAL RELEASES WY 1986 LAKE MEAD
<br />1000 cFS
<br />.. Reservoir Acre-feet Elevation, feet
<br /> Maximum Storage 27,377,rxYJ 1,229
<br />.. Rated Head 13,653,rxYJ 1,123
<br /> Minimum Power 1O,024,rxYJ 1,083
<br />.. Surface Area, full 162,700 Acres
<br /> Reservoir Length, full 18 Miles
<br />,. Powerplant
<br /> Number of Units 17
<br />. Total Capacity 1,429,rxYJ KW
<br />0 N D J F M A M J J A S 0
<br /> 15
<br />
<br />Water Year 1986
<br />
<br />At the beginning of water year 1986, Lake Mead, impounded
<br />by Hoover Dam, had a water surface elevation of 1,213 feet
<br />and an active storage of 24,875,rxYJ acre-feet. Ouring the
<br />winter months, the water level gradually declined to 1,201 feet
<br />near the end of January 1986. During the high inflow
<br />conditions of June and July, Lake Mead reached a high
<br />elevation of 1,210.2 feet in the last week of June, with a peak
<br />active storage of 24,421,rxYJ acre-feet. Ouring the water year,
<br />releases were made to meet downstream water use
<br />requirements in the United States and Mexico, flood control
<br />requirements, programmed levels of Lakes Mohave and
<br />Havasu, transit losses which include river and reservoir
<br />
<br />" ~" - ---
<br />- '...
<br />....
<br />
<br />evaporation, uses by phreatophytes, cbanges in bank storage,
<br />unmeasured inflows, and diversions. The total release from
<br />Lake Mead through Hoover Dam during water year 1986 was
<br />approximately 17,213,rxYJ acre-feet. All ofthat amount passed
<br />through the turbines for power production. At the end of the
<br />water year, Lake Mead had a water surface elevation of 1,209
<br />feet and an active storage of 24,220,rxYJ acre-feet which
<br />reflects a decrease in storage during the water year of 655,rxYJ
<br />acre-feet. On September 30, 1986, the active storage of Lake
<br />Mead was 855,000 acre-feet greater than the active storage in
<br />Lake Powell. '
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