WSP12946

• File Number: 8040.800
• Description: Water Resources for Colorado
• State: CO
• Date: 5/1/2005
• Author: US Dept of Agriculture - Natural Resoruces Conservation Service
• Title: Colorado Basin Outlook Report May 1, 2005
• Water Supply Pro - Doc Type: Data

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UPPER COLORADO RIVER BASIN
Streamflow Forecasts - May 1, 2005

<<=___=$ Drier -----= Future Conditions Wetter _.=-->>
Forecast point Forecast --_.._.==--_...=.~-= Chance Of Exceeding * =_..-=...==...=..=.._~
Period 90% 70% 50% 30% 10% 30-Yr Avg,
(1000AF) (1000AF) (1000AF) (% AVG.) (1000AF) (1000AF) (1000AF)
===~=~==.======~=_=============__====a~=c==__==_=__======-===.._--=- =====...===-=---===...= .-.-====.==....=----.-.---==----===--
Lake Granby Inflow APR-JUL 158 174 185 82 197 216 225
Willow Creek Reservoir Inflow APR-JUL 31 39 45 88 51 62 51
williams Fork Reservoir inflow APR-JUL 64 73 80 84 87 98 95
Dillon Reservoir Inflow APR-JUL 97 113 125 75 137 153 167
Green Mountain Reservoir inflow APR-JUL 188 210 225 80 241 265 280
Muddy Creek blw Wolford Mtn, Resv. APR-JUL 33 37 40 67 43 49 60
Eagle River blw Gypsum APR-JUL 212 239 260 78 283 319 335
Colorado River nr Dotsero APR-JUL 780 970 1100 76 1230 1420 1440
Ruedi Reservoir Inflow APR-JUL 77 93 105 75 119 143 141
Roaring Fork at Glenwood Springs APR-JUL 557 640 700 99 762 859 710
Colorado River nr Cameo APR-JUL 1410 1730 1950 81 2170 2490 2420

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UPPER COLORADO RIVER BASIN
Reservoir Storage (1000 AF) - End of April

UPPER COLORADO RIVER BASIN
Watershed Snowpack Analysis - May 1, 2005

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Usable I
Capacity I
I

*** Usable Storage .**
This Last
Year Year Avg

Watershed

Number
of
Data Sites

This Year as % of

Reservoir

Last Yr Average

DILLON 250.8 197.2 209.7 212.8 BLUE RIVER BASIN 9 122 75
LAKE GRANBY 465.6 128.1 163.4 259.5 UPPER COLORADO RIVER BASI 35 151 77
GREEN MOUNTAIN 139.0 69.3 68.5 54.3 MUDDY CREEK BASIN 3 226 59
HOMES TAKE 43.0 12.7 13 .6 16.8 PLATEAU CREEK BASIN 3 154 145
RUED I 102.0 67.2 65.5 59.7 ROARING FORK BASIN 187 103
VEGA 32.0 21.8 16.2 16.6 WILLIAMS FORK BASIN 4 153 82
WILLIAMS FORK 96.8 54.4 63.8 55.3 WILLOW CREEK BASIN 3 127 79
'WILLOW CREEK 9.0 6.4 6.6 5.9 TOTAL COLORADO RIVER BASI 46 157 88

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* 90%, 70%, 50%, 30%. and 10% chances of exceeding are the probabilities that the actual volume will exceed the volumes in the table.

The average is computed for the 1971-2000 base period.

(1) _ The values listed under the 10% and 90% Chance of Exceeding are actually 5% and 95% exceedance levels.
(2) - The value is natural volume - actual volume may be affected by upstream water management.