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Last modified
1/26/2010 4:34:40 PM
Creation date
4/3/2008 10:03:38 AM
Metadata
Fields
Template:
Water Supply Protection
File Number
8282.600.10.B
Description
2004 Annual Operating Plan
Basin
Colorado Mainstem
Author
USDOI/BOR
Title
2004 Annual Operating Plan for Colorado River Systems
Water Supply Pro - Doc Type
Operating Principles/Plan
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<br />January 7, 2004 14 <br />Reservoir in water years 1999, 2000, 200 I, and 2002 were 81, 44, 107, and 4 percent of average, <br />respectively. Reservoir storage in Navajo Reservoir has been significantly reduced due to these <br />protracted drought conditions. Reservoir live storage on September 30, 2003, was 43 percent of <br />capacity but only 7.2 percent of active capacity. The water surface elevation at Navajo Reservoir on <br />September 30, 2003, was 5,999.4 feet (1,828.6 meters). <br /> <br />The final report titled Flow Recommendations for the San Juan River (Flow Recommendations), <br />which outlines flow recommendations for the San Juan River below Navajo Dam, was completed by <br />the San Juan River Basin Recovery Implementation Program (SJRIP) in May 1999. The report <br />synthesizes research conducted on endangered fish inthe San Juan River over a 7-year period. The <br />purpose of the report is to provide flow recommendations for the San Juan River that promote the <br />recovery of the endangered Colorado pike minnow and razorback sucker, maintain important habitat <br />for these two species as well as the other native species, and provide information for the evaluation <br />of continued water development potential in the basin. It is anticipated that implementation of the <br />Flow Recommendations, or reasonable alternative to it, will allow for a nonjeopardy biological <br />opinion to be issued by the Service for the operations of Navajo Dam. <br /> <br />Due to the severity of the drought and the hydrologic conditions in the San Juan River Basin during <br />the spring runoff period, the Flow Recommendations did not provide for making a spring peak <br />release from Navajo Reservoir in 2003. Although there was no peak release, at times higher than <br />normal base flows were released from Navajo Reservoir during the spring and summer months <br />during water year 2003. Releases from Navajo Reservoir from June through August of 2003 <br />averaged 710 cfs (20 cms) and were as high as 1,050 cfs (30 cms) in mid-July. These releases were <br />necessary due to decreasing flows in the San Juan River endangered fish critical habitat area <br />(Farmington to Lake Powell). The Flow Recommendations call for an average weekly flow of <br />between 500 cfs (14 cms) and 1,000 cfs (28 cms) in this reach of the river. With minimal tributary <br />inflow to the San Juan River below Navajo Dam (primarily the Animas River) in 2003, this flow, as <br />well as the flow required to meet downstream demands and natural losses, had to be made up almost <br />entirely of releases from Navajo Reservoir. <br /> <br />In September of 2002, in response to a request by the Navajo Nation, coupled with much below <br />average streamflow forecasts in the San Juan River basin, Reclamation initiated discussions with the <br />Navajo Unit Contractors (Jicarilla Apache and Navajo Nations, Hammond Conservancy District, and <br />Public Service Company of New Mexico), along with the State of New Mexico and the U.S. Fish & <br />Wildlife Service, to develop a cooperative solution to deal with the extreme drought conditions in <br />the San Juan River basin. Noncontract, direct-flow diverters were subsequently brought into the <br />discussions. Resulting from these discussions was a set of recommendations for administering San <br />Juan River flows for the year 2003. The recommendations included limitations on diversions for <br />2003, criteria for determining a shortage, and shortage-sharing requirements in the event of a water <br />supply shortfall. A total of I o entities (the four Navajo Unit contractors, City of Farmington, <br />Arizona Public Service Company, BHP-Biliton, Bloomfield Irrigation District, Farmers Mutual <br />Ditch Company, and Jewett Valley Ditch Company) are endorsing parties of the recommendations. <br />The term for applying the recommendations extends to the end of calendar year 2003. . <br />
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