OCR Text |
Show APRIL 1, 1963 FORECASTS OF APRIL-JULY FLOW OF THE COLORADO RIVER NEAR GRAND CANYON, ARIZONA Agency Acre-Feet Soil Conservation Service Department of Agriculture.................................................... 4,000,000 U. S. Weather Bureau Department of Commerce...................................................... 5,400,000 Bureau of Reclamation Department of the Interior..............................-..................... 4,500,000 The measured flow of the Colorado River near Grand Canyon for the period April-July 1963, amounted to 405,900 acre-feet. During the April-July 1963 period the reservoirs of the Colorado River Storage Project accumulated 2,600,700 acre-feet in storage. STATISTICAL DATA FOR PRINCIPAL RESERVOIRS IN COLORADO RIVER BASIN (Units: Elevation - feet; capacity - 1,000 acre-feet) UPPER BASIN Colorado River Storage Project Flaming Gorge Navajo Lake Powell Elev. Capacity Elev. Capacity Elev. Capacity River elevation at dam (average tailwater) 5,602 0 5,720 0 3,143 0 Dead Storage 5,740 40 5,882.5 175 3,370 1,998 Inactive Storage (minimum power pool) 5,871 273 "5,990 673 3,490 6,124 Rated Head 5,972 1,629 - - 3,600 14,148 Maximum Storage (without surcharge) 6,040 3,789 6,085 1,709 3,700 27,000 lRequired for Navajo Indian Irrigation Project LOWER BASIN Lake Mead Lake Mohave Lake Havasu Elev. Capacity Elev. Capacity Elev. Capacity River elevation at dam (average tailwater) 646 0 506 0 370 0 Dead Storage 895 2,620 533.39 8.5 400 28.6 Inactive Storage (minimum power pool) 1,050 7,974 570 217.5 "440 468 Rated Head 1,122.8 14,500 Maximum Storage (without surcharge) 1,221.4 29,827 647 1,818.3 450 648 Contractual minimum for delivery to Metropolitan Water District's Colorado River Aqueduct. 19 |