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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SAN MIGUEL, DOLORES; ANIMAS, AND SAN JUAN RIVER BASINS
Streamflow Forecasts - May 1, 2005

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<<._____ Drier ..--.. Future Conditions Wetter ...-..>>
Forecast Point Forecast a==__=___=______=a=_ Chance Of Exceeding * ~_=a..__===_.=.=._D.==
Period 90% 70% I 50% 30% 10% 30-Yr Avg.
a==a=_a_=_=__=_==__===_=_===========_=___=__=___~:~~~~:~==~:~~~~::== ===~:~~~~~==~~a~~~:~__ (1000AF) (1000AF) (lOOOAF)
_.D=.==_===.=.=__C~==___==.=_=.__==._
Dolores River at Dolores APR-JUL 255 295 325 123 360 410 265
McPhee Reservoir inflow APR-JUL 350 395 430 134 465 520 320
San Miguel River nr Placerville APR-JUL 119 131 145 110 160 183 132
Gurley Reservoir Inlet MAY-JUL 13.6 16.0 17.7 120 19.4 22 14.8
MAY 10.20 116 8.83
JUNE 6.00 129 4.67
JULY 1.50 114 1.32
Cone Reservoir Inlet MAY-JUL 3.10 3.50 3.70 121 3.90 4.30 3.06
MAY 2.10 128 1.64
JUNE 1.20 115 1.04
JULY 0.35 92 0.38
Lilylands Reservoir Inlet MAY-JUL 2.08 2.63 3.00 122 3.40 3.90 2.45
MAY 1.58 120 1.32
JUNE 1.10 126 0.87
JULY 0.32 119 0.27
Rio Blanco at Blanco Diversion APR-JUL 67 75 81 153 87 98 53
Navajo River at Oso Diversion APR-JUL 79 91 100 145 110 124 69
San Juan River nr Carracus APR-JUL 510 570 615 152 660 735 405
piedra River nr Arboles APR-JUL 330 365 390 170 415 455 230
Vallecito Reservoir Inflow APR-JUL 285 310 330 161 350 380 205
Navajo Reservoir Inflow APR-JUL 1090 1260 1380 173 1520 1740 800
Animas River at Durango APR-JUL 545 595 630 143 670 725 440
Lemon Reservoir Inflow APR-JUL 78 90 100 172 110 126 58
La Plata River at Hesperus APR-JUL 31 35 38 152 42 47 25
.Mancos River nr Mancos APR-JUL 47 55 61 153 67 75 40
MAY 26 164 15.9
JUNE 22 161 13 .7
JULY 5.50 120 4.60

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SAN MIGUEL, DOLORES, ANIMAS, AND SAN JUAN RIVER BASINS
Reservoir Storage (1000 AF) - End of April

I SAN MIGUEL, DOLORES. ANIMAS, AND SAN JUAN RIVER BASINS
Watershed Snowpack Analysis - May 1, 2005

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Usable I
Capacity

... Usable Storage
This Last
Year Year Avg

Watershed

Number
of
Data Sites

This Year as % of

Reservoir

Last Yr Average

GROUNDHOG 21.7 0.1 10.4 14.2 ANIMAS RIVER BASIN 9 144 131
JACKSON GULCH 10.0 9.2 6.3 7.4 DOLORES RIVER BASIN 6 176 119
LEMON 40.0 13.6 17.0 23.4 SAN MIGUEL RIVER BASIN 5 183 132
MCPHEE 381.2 345.0 228.7 304.6 SAN JUAN RIVER BASIN 4 162 147
NARRAGUINNEP 19.0 18.7 19.0 17.1 TOTAL SAN MIGUEL. DOLORES 23 160 135
VALLECITO 126,0 43.7 88.6 70.3 AN JUAN RIVER BASINS

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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.