04/21 PROJECTED LOWER COLORADO RIVER OPERATIONS SCHEDULE
Water Flow Reports


Colorado River



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PROJECTED LOWER COLORADO RIVER
OPERATIONS SCHEDULE

Releases from Davis and Parker dams will vary from about 8,000 cfs to 22,000 cfs during a 24-hour period. River levels will vary during the 24-hour periods with the higher levels coinciding with periods of peak hydroelectric power generation. Levels below the dams are usually highest during the afternoon and early evening. Average daily releases may vary in response to changing conditions.

Average daily releases and midnight lake elevations for the week, as well as anticipated average for the following 2 weeks, are scheduled as follows:

Date Parker Dam Average Releases (cfs)
Lake Havasu Elev.
(ft)
Davis Dam Average Release (cfs) Lake Mohave Elev.
(ft)
Hoover Dam Average Release (cfs) Lake Mead Elev.
(ft)
Glen Cyn Dam Average Release
(cfs)
Apr 21 14,000 447.7 18,400 641.1 22,600

1150.0

10,100
Apr 22 14,000 447.7 18,400 641.4 23,200 1149.8 10,100
Apr 23 12,800 447.8 18,400 641.7 23,200 1149.6 10,100
Apr 24 11,200 448.1 18,400 642.0 23,200 1149.3 10,100
Apr 25 13,000 448.2 18,400 642.3 22,600 1149.1 10,100
Apr 26 13,800 448.2 18,400 642.2 18,200 1148.9 10,100
Apr 27 13,800 442.3 18,400 642.2 18,200 1148.8 10,100
Average 13,200 - 18,400 - 21,600 - 10,100
Apr 28 to May 4 13,200 448.7 17,800 642.4 18,900 1147.7 10,400
May 5 to May 11 12,900 448.5 16,900 642.5 17,400 1146.8 10,600

Current Lake Powell storage is 12,300 thousand acre-feet (KAF) (51 percent of capacity). Lake Mead storage is 16,656 KAF (64 percent of capacity). Total system storage is 35,302 KAF (59 percent of capacity). Lake Powell elevation is 3605.4 feet.

The forecasted 2003 April - July unregulated inflow into Lake Powell is 4.8 million acre-feet, or 61 percent of average.

Yesterday, the average Colorado River flows were 920 cfs near the Yuma Fourth Avenue Bridge and 3,097 cfs at the Northerly International Boundary. The average release from Painted Rock Dam was 0 cfs and Alamo Dam was 25 cfs. The Morelos Dam diversions for the week of April 21, 2003 are expected to be 3,000 cfs.

All RIVER USERS should remember that fluctuating river flows may conceal or create natural hazards such as moving sandbars, gravel bars, unstable riverbanks, floating or submerged debris, or other unfamiliar obstacles. Caution should be be exercised while using the river between Davis Dam and the Mexican Border at San Luis, Arizona.

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