My WebLink
|
Help
|
About
|
Sign Out
Home
Browse
Search
WSP13009
CWCB
>
Water Supply Protection
>
DayForward
>
1001-2000
>
WSP13009
Metadata
Thumbnails
Annotations
Entry Properties
Last modified
1/26/2010 4:34:38 PM
Creation date
4/3/2008 9:36:25 AM
Metadata
Fields
Template:
Water Supply Protection
File Number
8282.600.10.B
Description
2005 Annual Operating Plan
Basin
Colorado Mainstem
Author
USDOI/BOR
Title
2005 Annual Operating Plan for Colorado River System Reservoirs
Water Supply Pro - Doc Type
Operating Principles/Plan
There are no annotations on this page.
Document management portal powered by Laserfiche WebLink 9 © 1998-2015
Laserfiche.
All rights reserved.
/
49
PDF
Print
Pages to print
Enter page numbers and/or page ranges separated by commas. For example, 1,3,5-12.
After downloading, print the document using a PDF reader (e.g. Adobe Reader).
Show annotations
View images
View plain text
<br />The Flow Recommendations did not provide for making a spring peak release from Navajo <br />Reservoir in 2004 due to the severity of the drought and the hydrologic conditions in the San Juan <br />River Basin. Although there was no peak release, at times higher than normal base flows were <br />released from Navajo Reservoir during the spring and summer months during water year 2004. <br />Releases from Navajo Reservoir from June through August 2004 averaged 548 cfs (15.5 ems) and <br />were as high as 806 cfs (22.8 cms) in mid-August. These releases were necessary due to decreasing <br />flows in the San Juan River endangered fish critical habitat area (Farmington to Lake Powdl). The <br />Flow Recommendations call for an average weekly flow of between 500 cfs (14 cms) and 1,000 cfs <br />(28 cms) in this reach of the river; however, because of the poor water supply conditions at Navajo <br />Reservoir, the SJRJP and the Fish and Wildlife Service concurred in providing a lesser basle flow of <br />.400 cfs through the critical habitat reach during the 2004 irrigation season only, which flow is <br />deemed sufficient to maintain endangered fish populations and habitat in the San Juan River through <br />the critical habitat reach for the designated time period. With minimal tributary inflow to the San <br />Juan River below Navajo Dam (primarily the Animas Rive:r)in 2004, this flow, as well as the flow <br />required to meet downstream demands and natural losses, had to be made up almost entirely of <br />releases from Navajo Reservoir. <br /> <br />In response to the extremely low storage level in Navajo Reservoir, coupled with a less-than-average <br />predicted inflow in 2004, a shortage sharing agreement was developed among water users in 2004. <br />The 2004 shortage sharing recommendations were similar to the agreement that was developed in <br />2003. Ten major water users, including the Jicarilla Apache and Navajo Nations, Hammond <br />Conservancy District, Public Service Company of New Mexico, City ofFarrnington~ ArizC)na Public <br />Service Company, BHP-Billiton, Bloomfield Irrigation District, Fanners Mutual Ditch,~md Jewett <br />Valley Ditch, endorsed the. recommendations which included limitations on diversions for 2004, <br />criteria for determining a shortage, and shortage-sharing requirements in the event of a water supply <br />shortfall, including sharing of shortages between the water users and the flow demands for <br />endangered fish habitat. In addition to the ten major water users, the New Mexico Interstate Stream <br />Commission, the Bureau of Indian Affairs, the Fish and Wildlife Service, and the SJRIP all provided <br />input to the recommendations, and the recommendations were accepted for reservoir operation and <br />river administration purposes by Reclamation and the New Mexico State Engineer; <br /> <br />1be criteria used for determining a water shortage in 2004 at Navajo Reservoir was based on <br />protecting an elevation of5,990 feet (the top of the inactivle pool), with future inflows assumed to be <br />at minimum probable levels (90 percent exceedance). When the water surface elevation at Navajo <br />Reservoir was projected to fall below 5,990 feet, with projected inflows at the minimum probable <br />level, a water supply shortfall was determined. The shortage calculations were updated frequently as <br />runoff forecasts changed and actual runoff materialized. Because of sufficient inflow into Navajo <br />Reservoir in 2004, no shortages were required during the 2004 water year. <br /> <br />Reclamation IS proceeding through a NEP A process on the implementation of operations at Navajo <br />Dam that meet the Flow Recommendations, or a reasonable alternative to them. A Notice of Intent <br />to prepare an EIS was filed on October 1, 1999,in the Federal Register. A draft EIS was released on <br /> <br />13 <br />
The URL can be used to link to this page
Your browser does not support the video tag.