WSP04878

• File Number: 8210.140.20
• Description: Colorado River Basin Organizations and Entities - Colorado River Basin States Forum - California
• State: CA
• Basin: Western Slope
• Date: 1/1/1974
• Author: Myron B Holburt
• Title: Appendix to Annual Report of the Colorado River Board of California for the Calendar Year 1973
• Water Supply Pro - Doc Type: Annual Report

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TABLE 2

CAPACITY, ACTIVE STORAGE, AND STORAGE CHANGE
OF r~JOR COLORADO RIVER BASIN RESERVOIRS
DURING \lATER YEAR 1972-73
(Thousands of Acre-Feet)

Gross
Capacity

Upper Basin

Lalce POl'Tell
Flaming Gorge
Navajo
Blue j.lesa
Fontenelle
Norrow Point

27,000
3,7d9
1,709
941
31,5
117

Subtotal

33 ,901

Lower Basin

Lake r.lead
Lake l10have
Lake Havasu

28,537
1,8H\
6~d

Subtotal 31,003
Total Both Basins 6l,,904

Usable
Capacity

25,002
3,71>9
1,696
S30
345
117

31,739

26,159
1,810
619

2d, 588

60,327

Active
Storage
Sept. 30,
1973

17,281.:.
3,180
1,393
716
337
115

23,025

20,176
1, L:12
562

22,150
l:.5,175

Change
Durinc;
Year

+ 1>, 796
285
+ L,.95
+ 205
5
1

+ 5,205

+ 2, 725
+ 8
2

+ 2,731
+ 7",936

The Bureau of Reclmnation has assumed, that the alllount of water
that percolates into the areas adjacent to Lako Pmmll is not lost
but has gone into ground \'later storage or "bank storage". It is
the residual resulting from a hydrologic balance of Lake POl'Tell
inflo\"l, outflO\'T, change in surL'ce stc:'a[!;e, and evaporation.
Evaporation and a portion of the inflo"r must be estimated; t:ms,
the estimated bank storage is subject to ':ride 7ariation and possible
error. The 1973 year-end bank storage in Lake Pouell \"las estimated
to be 7.1 maf, representing an increase in bank storage from 1972
of 200, 000 'acre~feet.

Hater Uses

.

Colorado River Basin depletions in the Upper Basin are classi-
fied by the U.S. Bureau of Reclamation as inbasin consumptive uses,
trans-basin diversions, and reservoir evaporation. Irrigated
agriculture is responsible for most of the inbasin consumptive uses.

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