UUTED STATES Siener L. tla, Secretary TERIOR S. BUREAU OF RECLAMATION Floyd E. Dominy, Commissioner DI TECHNICAL RECORD of DESIGN AND CONSTRUCTION NAVAJO DAM AND RESERVOIR Constructed 1958-1963 Navajo Unit, Colorado-New Mexico San Juan Division Colorado River Storage Project Denver, Colorado Price $5.35 Engin. Library 56077 -A53 What Igbo In addition to regulating the flows of the San Juan River, it will provide storage required for the Navajo Indian Irrigation project and make possible the upstream diversion of water for the San Juan-Chama project. It will also provide recreational and fish and wildlife conservation facilities. Location: On San Juan River 39 miles (62.76 kilometers) east of Farmington, N. Mex. Constructed: 1958-1963 Drainage area: 3, 190 square miles (8, 261 square kilometers) Reservoir meters) Active capacity: 1,036, 100 acre-feet (127,803, 000, 000 cubic meters) Total capacity: 1,708,600 acre-feet at elevation 6085. 0 (210, 756, 000, 000 cubic meters at elevation 1, 854.71 meters) Maximum water surface elevation: 6101.5 (1, 859.74 meters) Dam Type: Zoned earthfill Structural height: 402 feet (122. 53 meters) Spillway meters per second at maximum water surface elevation 1, 859.74 meters) Main Outlet Works Location and type: Concrete tower intake structure 280 feet (85.34 meters) high, 18-foot 9-inch (5.72-meter) diameter concrete-lined tunnel with a gate structure and shaft for a 6- by 13-foot (1.83- by 3.96-meter) fixed-wheel gate, access tunnels and shaft, a 110-inch-diameter (279. 40-centimeter) steel outlet pipe installed in the concrete-lined tunnel, and two 72-inch (182, 88-centimeter) hollow-jet valves and ring-follower gates, all located in the right abutment. A 30-inch-diameter (76.20-centimeter) steel pipe encased in concrete extends from the tunnel access house to a control house for a 30-inch (76.20 centimeter) ring-follower gate and a similar-sized hollow-jet valve. Capacity: 4, 378 second-feet at maximum water surface elevation 6101.5 (123.97 cubic meters per second at maximum water surface elevation 1, 859.74 meters) and with both 72-inch (182. 88-centimeter) valves and the 30-inch (76.20centimeter) valves fully open Auxiliary Outlet Works for two 4- by 4-foot (1.22- by 1.22-meter) gates in tandem, all located in NAVAJO DAM AND RESERVOIR ERRATA The following corrections should be made on the sheet of statistics following the title page: Navajo Reservoir Active capacity (in metric units) should be changed to read 1, 278, 000, 000 cubic meters. Total capacity should be changed to read 2,107, 600, 000 cubic meters. Auxiliary Outlet Works Capacity (in metric units) should be changed to read 50. 26 cubic meters per second. |