WSP03822

• File Number: 8282.600.10
• Description: Colorado River Operating Annual Reports
• Basin: Colorado Mainstem
• Date: 1/1/1978
• Author: USDOI/BOR
• Title: Operation of the Colorado River Basin 1978 Projected Operations 1979
• Water Supply Pro - Doc Type: Publication

Glen Canyon Dam, Lake Powell

STATISTICS
ACTIVE STORA.GE'
RESERVOIR

(ACRE. ELEVATION
FEET) IFEET)
25,002,000 3700
9A2B.OOO 3570
4,126.000 3490
161,390ACAES
185MILES

MAXIMUM STORAGE
RATED HEAD
MINIMUM POWER
SURFACE AREA (FULL)
RESERVOIR LENGTH (FULLI
POWER PLANT
NUMBER OF UNITS B
TOT AL CAPACITY OF UNITS 900.000 KILOWATTS
'does nor mclud~ ',996,000 'ere feer-of rttJild stoflgt
belo'f/l:J:J70feer

20

10

~ 0
820
w
"
;:
;:j 10
"
u
.
B 0 ~..
o 20
8

~ ~ ~ ~
> < >
WOller Yea. ]97'

w >
z "
~ ~

14

During water year 1978 Lake Powell was
operated as part of the Colorado River
Storage Project in accordance with govern-
ing contracts and laws to provide river
regulation, optimum power production,
recreation opportunities, and fish and
wildlife benefits,

On September 30, 1977, Lake Powell water
surface elevation was at 3637 feet with an
active storage of 16,143,000 acre-1eet,

During the fall and winter months of 1977-
78 the reservoir water level dropped about
14 feet to elevation 3623 feel, Low releases
from Glen Canyon during April, May, and
June allowed the Bureau to integrate
purchased power into the Colorado River
Storage Project Systems when it was
readily available, The April-July 1978runoff
of 1he Colorado River at Lees Ferry, Arizona
was 8,995,000 acre-feet or 115 percent of
the longtime average, By the end of the
water year 1978, the level of Lake Powell
had risen a total of 3 feet to elevation 3640
feel. (Chart 7,)

OUTFLOW

o
o ~
< ~

w
Z
,

CD a: ~ >-
~ ~ of ~
Water Year 1979

u
o
<

o ~ ~
o z a

z
~

.
w
~ I