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Last modified
1/26/2010 4:34:40 PM
Creation date
4/3/2008 10:26:36 AM
Metadata
Fields
Template:
Water Supply Protection
File Number
8282.600.10.B
Description
2003 Annual Operating Plan
Basin
Colorado Mainstem
Author
USDOI/BOR
Title
2003 Annual Operating Plan for Colorado River System Reservoirs
Water Supply Pro - Doc Type
Operating Principles/Plan
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<br />River, so as to more closely mimic historic Green River flows. Releases from Flaming Gorge Dam, <br />under the most probable scenario, in the winter and early spring months of2003 will be relatively <br />low (approximately 800 cfs) in order to conserve reservoir storage. <br /> <br />Blue Mesa, Morrow Point, and Crystal Reservoirs (Aspinall Unit) <br /> <br />Severe drought c~nditions prevailed in the Gunnison River Basin in water year 2002. The April <br />through July unregulated runoff into Blue Mesa Reservoir in 2002 was only 0.157 maf (193 mcm), <br />or 22 percent of average. Water year 2002 unregulated inflow was 0.324 maf (400 mcm), or 32 <br />percent of average. This inflow was the lowest ever recorded since closure of Blue Mesa Dam in <br />1969. The low inflow caused Blue Mesa Reservoir to decrease in storage in water year 2002 by <br />0.322 maf (397 mcm). Storage in Blue Mesa Reservoir on September 30,2002, was 0.275 maf(339 <br />mcm), or 33 percent of capacity. Water year 2002 powerplant bypasses were approximately 0.027 <br />maf(33 mcm) at Crystal, all of which were the result of annual system maintenance. <br /> <br />On August 16, 1995, Memorandum of Agreement (MOA) No. 95-07-40-R1760 was signed by the <br />Bureau of Reclamation, U.S. Fish and Wildlife Service (Service), and Colorado Water Conservation <br />Board. The purpose of the MOA was to provide water to the Redlands Fish Ladder and assure at <br />least 300 cfs (8.5 cms) of flow in the 2-mile reach of the Gunnison River between the Redlands Fish <br />Ladder and the confluence of the Gunnison and Colorado Rivers (2-mile reach). This MOA was <br />extended for an additional five years on June 30, 2000. A key provision ofthe MOA requires that <br />the parties adopt a plan to share water shortages in dry years, when total storage at Blue Mesa <br />Reservoir is projected to drop below 0.4 maf (493 mcm) by the end of the calendar year. <br />Accordingly, a plan to share or allocate physical water shortages due to the extremely dry <br />hydrological conditions occurring in the Gunnison River Basin was developed for water year 2002 <br />and implemented among the MOA parties, along with the Colorado River Water Conservation <br />District (CRWCD) and Redlands Water and Power Company (Redlands). <br /> <br />Specifically, the shared shortage plan for water year 2002 recognized that Redlands would not likely <br />have water available to satisfy its senior rights and that the Service would have insufficient water <br />available to meet fish passage needs in the 2-mile reach of the Gunnison River downstream of the <br />Redlands Fish Ladder. In normal years, Redlands can place its senior call for 750 cfs (21.2 cms) and <br />the Service relies upon releases from the Aspinall Unit to provide fish passage flows in the 2-mile <br />reach of at least 300 cfs during summer season. For water year 2002, it was agreed that Redlands <br />would voluntarily reduce its senior river call and the Service would reduce the 2-mile reach flow <br />requests for the period June through October. In exchange, Aspinall operations were modified to <br />provide at least 600 cfs (17.0 cms) to Redlands and the 2-mile reach flows were maintained at <br />reduced rates as follows: <br /> <br />June 2002 <br />July 2002 <br />August 2002 <br />September 2002 <br />October 2002 <br /> <br />200 cfs (5.7 cms) <br />250 cfs (7.1 cms) <br />250 cfs (7.1 cms) <br />100 cfs (2.8 cms) <br />o cfs (0 cms) <br /> <br />December 13,2002 <br /> <br />11 <br />
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