WSP12947

• File Number: 8040.800
• Description: Water Resources for Colorado
• State: CO
• Date: 6/1/2004
• Author: US Dept of Agriculture - Natural Resoruces Conservation Service
• Title: Colorado Basin Outlook Report June 1, 2004
• Water Supply Pro - Doc Type: Data

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SAN MIGUEL, DOLORES, ANIMAS, AND SAN JUAN RIVER BASINS
Streamflow Forecasts - June 1, 2004

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I <<...... Drier ._.... Future Conditions Wetter .....>>
I
Forecast Point Forecast I ......_.A....~.D.... Chance Of. Exceeding * ........._c.....=.....
Period I 90% 70% 50% (Most Probable) 30% 10% 30-Yr Avg.
I (1000AF) (lOOOAF) I (lOOOAF) (% AVa.) (lOOOAF) (lOOOAF) (1000AF)
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Dolores River at Dolores APR-JUL 146 157 I 170 64 183 200 265
McPhee Reservoir inflow ApR-JUL 170 179 I 195 61 208 233 320
San Miguel River nr Placerville APR-JUL 75 87 I 95 72 103 115 132
Gurley Reservoir Inlet JUN -JUL 0.58 1.66 I 2.40 40 3.14 4.22 6.00
JUNE I 2.10 45 4.67
JULY I 0.33 25 1.32
Cone Reservoir Inlet JUN - JUL 0.14 0.29 I 0.60 42 0.92 1.38 1.43
JUNE I 0.50 48 1. 04
JULY I 0.10 26 0.38
Lilylands Reservoir Inlet JUN-JUL 0.13 0.37 I 0.53 47 0.69 0.93 1.14
JUNE I 0.43 49 0.87
JULY I 0.10 37 0.27
Rio Blanco at Blanco Diversion APR-JUL 28 36 I 41 77 46 54 53
Navajo River at Oso Diversion APR-JUL 36 46 I 53 77 60 70 69
San Juan River nr Carracus APR-JUL 200 232 I 270 67 311 377 405
Piedra River nr Arboles APR-JUL 154 169 I 180 78 191 206 230
Vallecito Reservoir Inflow APR-JUL 92 129 I 165 81 200 240 205
Navajo Reservoir Inflow APR-JUL 330 440 I 550 69 665 775 800
Animas River at Durango APR-JUL 215 275 I 330 75 385 445 440
Lemon Reservoir Inflow APR-JUL 38 46 I 51 88 56 64 58
La Plata River at Hesperus APR-JUL 13.8 15.0 I 16.0 64 18.4 22 25
Mancos River nr Mancos APR-JUL 18.0 22 I 26 65 32 40 40
JUNE I 7.0 51 13.7
JULY I 2.00 44 4.60

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SAN MIGUEL, DOLORES, ANIMAS, AND SAN JUAN RIVER BASINS I SAN MIGUEL, DOLORES, ANIMAS, AND SAN JUAN RIVER BASINS
Reservoir Storage (1000 AF) - End of May I Watershed Snowpack Analysis _ June 1, 2004
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" Usable I *** Usable Storage *** I Number This Year as % of
Reservoir Capacityl This Last I Watershed of .................
I Year Year Avg I Data Sites Last Yr Average

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JACKSON GULCH 10.0 10.0 9.6 9,3 DOLORES RIVER BASIN 4 0 0
LEMON 40.0 34.5 19.7 29.2 I SAN MIGUEL RIVER .BASIN 3 0 0
MCPHEE 381.2 295.4 242.8 328,0 SAN JUAN RIVER BASIN 3 214 48
NARRAGUINNEP 19.0 14.3 18.8 17.4 I TOTAL SAN MIGUEL, DOLORES 16 277 26
VALLECITO 126.0 118.0 79.1 93.9 I AND JUAN RIVER BASINS

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* 90%, 70%, 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.