OCR Text |
Show tion on the San Juan River in northwestern New Mexico. These rules will be changed from time to time by the Bureau of Reclamation as operating experience dictates but, in general, shall remain in effect until satisfactory operating levels are achieved at Glen Canyon Dam or water deliveries for the Navajo Indian Irrigation Project or other demands on the reservoir require permanent operating rules. "1. Navajo Dam shall be operated by the United States as a storage unit of the Colorado River Storage Project subject to the terms of the Upper Colorado River Basin Compact, the Colorado River Compact, the Colorado River Storage Project Authorizing Act of April 11, 1956 (70 Stat. 105), and the Act of June 13, 1962 (76 Stat. 96), authorizing the San Juan-Chama and Navajo Indian Irrigation Projects. "2. For the purpose of flood control, a permanent plan for which is being developed in conjunction with the Corps of Engineers, the Navajo Reservoir will be permitted to rise only to safe operating levels based on progressive runoff forecasts from January 1 through July. Orderly releases of snowmelt runoff will be scheduled accordingly within the physical capacities of the outlet works and the downstream channel so as to minimize flood damages on downstream developed areas on the San Juan River. Such schedule of releases will also consider simultaneous flood flows from downstream tributaries and the maintenance of space in the reservoir to adequately control normal late summer and early fall rain floods. "3. Releases from Navajo Reservior shall be in accord with the following: "a. A continuous flow of 500 cubic feet per second, or more, shall be maintained in the channel immediately below Navajo Dam. "b. To avoid damage to the unprotected area of the dam below the riprap facing, the reservoir water surface level, when below elevation 5,990 feet, will not be held constant for any considerable period of time but will be kept gradually moving either up or down by adjusting the releases from the reservoir within the limitations of paragraphs 2 and 3a. "c. To assist in the acquisition of initial storage at Glen 25 |