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Last modified
1/26/2010 2:21:07 PM
Creation date
10/12/2006 1:25:12 AM
Metadata
Fields
Template:
Water Supply Protection
File Number
8282.600.40
Description
Colorado River Annual Operations Reports
Basin
Colorado Mainstem
Date
1/1/2000
Author
USDOI/BOR
Title
Colorado River Reservoir Operation Status Reports Part 1
Water Supply Pro - Doc Type
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<br />The Bureau of Reclamation plans to hold public meetings on Navajo Reservoir operations annually <br />in January, April, and August at varying locations. These are open forum meetings and anyone <br />interested in the general operation of the reservoir is encouraged to attend. The next meeting is <br />scheduled for January 2000. At this meeting Reclamation officials will present the alternatives for <br />near tenn operation of the reservoir. For further infonnation about these meetings or the daily <br />operations of Navajo Reservoir please contact Rege Leach in Reclamation's Durango Office at (970) <br />385-6553. <br /> <br />Glen Canvon Dam - Water year 2000 is shaping up to be a dry year in the Upper Colorado River <br />basin. Despite the fact that there were a couple of snowstonns in the basin the first 2 days of the new <br />year, snowpack is much below average. As of January 4, basin snowpack is only 49 percent of <br />average. While it is still early in the year and conditions could change. it is likely that inflow to Lake <br />Powell this year will be below average. The preliminary January inflow forecast, issued by the <br />National Weather Service on January 3, is predicting inflow to Lake Powell this coming runoff <br />season (April through July) to be only 4.25 million acre-feet (55 percent of average). <br /> <br />Because of the dry basin conditions, releases from Glen Canyon Dam are being reduced. Releases <br />from Glen Canyon in January will be reduced by about 20 percent from the volume contained in the <br />December operating plan. Releases in January will average about 13,400cfs on weekdays, 12,800 <br />cfs on Saturdays, and 11,600 on Sundays. "Off peak" releases (late evening and early morning <br />releases) will be approximately 9,500 cfs. "On peak" releases (late afternoon and early evening <br />releases) will be approximately 17,000 cfs, 15,000 cfs, and 14,000 cfs on weekdays, Saturdays, and <br />Sundays, respectively. <br /> <br />Inflow to Lake Powell in December was 0.39 million acre-feet (91 percent of average). Releases in <br />December averaged about 16,500 cfs. Inflow so far this water year (October through December) has <br />been 92 percent of average. <br /> <br />Inflow to Lake Powell during 1999 was close to average. Water year 1999 unregulated inflow was <br />12.7 million acre-feet (108 percent of average). April through July represents the runoff period in <br />the Colorado River basin. April through July unregulated inflow to Lake Powell in 1999 was 7.62 <br />million acre-feet (99 percent of average). <br />
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