WSP13019 ‎(2)‎

• File Number: 8040.800
• Description: Colorado Water Resources
• State: CO
• Basin: Statewide
• Date: 7/1/1999
• Author: Division of Water Resources
• Title: Colorado Water Supply Conditions Update Reports
• Water Supply Pro - Doc Type: Data

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COLORADO BASIN

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Basinwide Conditions Assessment
The SWSI value of ~2.6 indicates that for January
the basin water supplies were below normal. The Natural
Resources Conservation Service reports that February 1
snowpack is 70% of normal. Flow at the gaging station
Colorado ,River near Dotsero was 811 cfs, as compared to
the long-term average of 987 . cfs. Storage in Green
Mountain, Ruedi, and Williams Fork reservoirs totaled 93%
of normal as of the end of January.

Outlook
January precipitation was less than 50% of average
for the Lower Colorado Basin and ranged from 50% to 89%
of average for the Upper Basin. National Weather Service
forecasts are predicting April-July runoff to be 69% of.
average at the Dotsero gage and 70% at the Cameo gage.
Plateau Creek runoff is pr~dicted to be only 57% of average,
and Muddy Creek (at Wolford. Mtn. Reservoir) only 63%. An
EI Nino 'weather pattern may be developing this year, but it
will probably not have an imp~ct until summer. With current
data, Green Mountain Reservoir has only a 40% chance of
filling this year and Granby Reservoir is not expected to fill.

Administrative/Manaaement Concerns
The senior Shoshone power call with no swing right
remained on through January. at the reduced amount of 700
cfs for turbine maintenance at the power plant. When the
power plant maintenance is completed in March, the call will
continue at the raised level of .approximately 1,400 cfs. The
river call should remain off until summer for the lower Basin. .

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COlORADO RIVER I\R. OOTseRo, A.OW BY WAlER YEAR

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