WSP08531

• File Number: 8282.600.10
• Description: Colorado River Operating Annual Reports
• Basin: Colorado Mainstem
• Date: 1/1/1972
• Author: USDOI/BOR
• Title: Operation of the Colorado River Basin 1972 Projected Operations 1973
• Water Supply Pro - Doc Type: Publication

Glen Cangon Dam
lake Powell

RESERVOIR
MAXIMUM STORAGE
RATED HEAD
MINIMUM POWER
SURFACE AREA (FULL!
AESERVOIR lENGTH (FULL)
POWER PLANT
NUMBER OF UNITS 8
TOTAL CAPACITY OF UNITS 900,000 KILOWATTS
"do'!J !tot ;ncll/dt I.998J}()Oacre fen of de6d stOrage below 3370 feet

ACTIVE STORAGE.
(ACRE. FEET)
25,002.000
9,428.000
4,126.000
161,390 ACRES
186MlLES

ELEVATION [FEET)
:3700
3570
3490

Lake Powell has been operated as part of the
Colorado River Storage Project in accordance
with goveming compacts and laws to provide
optimum power production, recreation oppor-
tunities, and fish and wildlife benefits. One of
the importan t functions of the reservoir is to
provide wa ter from storage to meet the delivery
of 75,000,000 acre-feet to the Lower Basin each
10 years as required by the Colorado River
Compact. A total of 9,310,000 acre-feet was
released from Lake Powell during water year
1972, with 9,330,000 acre-feet passing the
Compact point at Lee Ferry, Arizona. Releases
from Lake Powell during the year were sched-
uled so that Lake Mead remained a t a near-
constant level during the bas5 spawning season
to provide good habitat for propagation.
On September 30, 1971, Lake Powell had an
elevation of 3,614 feet and an active storage of
13,609,000 acre-feet. The high water elevation
occurred On June 27, 1972, when the reservoir
had 14,198,000 acre-feet of active storage at
elevation 3,620 feet. This is about 2 feet lower
than the all-time high that occurred last year.
The ~pril-July 1971 runoff above the gage at
Lees Ferry, Arizona, un depleted by CRSP reser-
voirs, was 5.6 million acre-feet or 68 percent of
the 1906-68 average. On September 30, 1972,
the lake had receded] 7 feet to elevation 3,603
feet and had an active storage of 12,488,000
acre-feet. (Chart 6).

STATISTICS

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Water Year 1972

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