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WSP03308
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Last modified
1/26/2010 12:49:41 PM
Creation date
10/11/2006 11:39:11 PM
Metadata
Fields
Template:
Water Supply Protection
File Number
8220.105.I
Description
Colorado River-Water Projects-Navajo-Environmental Studies
State
CO
Basin
Colorado Mainstem
Water Division
5
Date
1/26/2004
Title
Navajo Dam EIS-Draft Bio Opinion-US Fish and Wildlife Service New Mexico Ecological Services Field Office
Water Supply Pro - Doc Type
Report/Study
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<br />. <br /> <br />. <br /> <br />if <br /> <br />~ <br /> <br />Area Manager <br />DRAFT <br /> <br />5 <br /> <br />the intent of the Flow Recommendations (SJRJP 2003). Because of this, in 2002 the SJRJP <br />Biology Committee of the SJRIP suggested that flows be monitored by following the "Three <br />Gauge Rule": "Use the lesser of the average of Bluff, Four Comers and Shiprock (gauges) and <br />the average of Farmington, Shiprock, and Four Comers (gauges). Extreme conditions (low or <br />high flows) identified by Reclamation will be handled on a case-by-case basis with <br />recommendations of the Biology Committee" (SJRIP 2003). Reclamation will use the "Three <br />Gauge Rule" until a better system is developed. <br /> <br />Figure 3 <br /> <br />The proposed action was modified by Reclamation from what was presented in the July 2003 BA <br />by inclusion of "extreme conditions" language. The extreme conditions language was modified <br />by Reclamation from the Shortage Sharing Agreement language developed in response to the <br />2003 water year and provided to the Service via electronic mail. The 2003 shortage sharing <br />recommendation documents can be found at htto://southwest.fWs.gov/siri%rogdocs.html. Prior <br />to 2003, the hydrologic scenario used to model water availability in the San Juan Basin met the <br />Flow Recommendations and water users received their full allocation. In 2003, Reclamation <br />faced the possibility that there would not be enough water to meet the water demands of all the <br />users and adhere to the Flow Recommendations. In response to the potential water shortage in <br />the San Juan Basin, Reclamation worked with all the water users to develop an agreement to <br />share shortages equally. This shortage sharing process has been included in the project <br />description to illustrate the mechanism by which Reclamation shall define "extreme conditions," <br />and describe San Juan River management under those conditions. <br /> <br />Reclamation will utilize existing Navajo Reservoir Operations meetings, held three times a year, <br />to discuss the upcoming period's operations. At these meetings, held in January, April, and, <br />August of each year, Reclamation will solicit input regarding the many and diverse affected <br />resources on the San Juan River from members of the public, government (local, state, Federal) <br />agencies, Tribes, and others to gain the required information needed to regulate water releases <br />from Navajo Reservoir. Reclamation will use existing water inflow forecasts, reservoir level, <br />and historic averages to predict the water supply available to meet Flow Recommendations and <br />authorized purposes. This information, along with the decision tree for peak flows, will be <br />analyzed and considered by Reclamation to develop an operation plan, The operations will <br />provide releases between 250 and 5,000 cfs. Reclamation will be responsible for implementing <br />the operation plan following completion of a Record of Decision under the National <br />Environmental Policy Act (NEP A) process. <br /> <br />The proposed change in reservoir operation, along with other elements of the SJRIP, would <br />conserve endangered fish in the San Juan River downstream from Farmington, New Mexico, and <br />enable water development to proceed in the San Juan River Basin in compliance with applicable <br />laws, compacts, court decrees, and American lndian trust responsibilities. Reclamation would <br />continue to operate Navajo Dam to meet the authorized project purposes while modifYing <br />reservoir release patterns to meet Flow Recommendations, which are designed to maintain or <br />improve habitat for the razorback sucker and pikeminnow. Additional information can be found <br />in the draft environmental impact statement on the project (Reclamation, 2002). <br />
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