WSP12944

• File Number: 8040.800
• Description: Water Resources for Colorado
• State: CO
• Date: 3/1/2003
• Author: US Dept of Agriculture - Natural Resoruces Conservation Service
• Title: Colorado Basin Outlook Report March 1, 2003
• Water Supply Pro - Doc Type: Data

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SAN MIGUEL, DOLORES, ANIMAS, AND SAN JUAN RIVER BASINS
Streamflow Forecasts - March 1, 2003

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<<====== Drier ======

Future Conditions

Cone Reservoir Inlet

Wetter =====>> 1
I
Forecast I ==================== Chance Of Exceeding * ====================== I
Period 1 90% 70% 1 50% (Most Probable) I 30% 10% I 3Q-Yr Avg.
I (1000AF) (1000AF) I (1000AF) (% AVG.) 1 (1000AF) (1000AF) 1 (lOOOAF)
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DoloreS River at Dolores APR-JUL 95 152 1 190 72 1 230 285 265
McPhee Reservoir inflow APR-JUL 115 180 1 225 70 1 270 335 320
San Miguel River nr Placerville APR-JUL 47 75 1 95 72 1 115 143 132
Gurley Reservoir Inlet APR-JUL 5.2 9,0 I 11.5 70 1 14.0 18.0 16.5
APRIL I 1. 50 90 I 1. 66
MAY 1 7.00 79 I 8,83
JUNE I 2.50 54 I 4.67
JULY I 0.50 38 I 1.32
APR-JUL 0.46 1.61 1 2.50 71 I 3.40 4.70 3.53
APRIL I 0.42 91 1 0.46
MAY I 1.32 81 1 1.64
JUNE 1 0.60 58 1 1.04
JULY I 0.16 42 I 0.38
APR-JUL 0.87 1.51 I 1.95 68 1 2.38 3.08 2.86
APRIL 1 0.27 68 I 0.40
MAY I 1.10 83 I 1.32
JUNE I 0.48 55 I 0.87
JULY I 0.10 37 1 0.27
APR-JUL 10.0 24 1 34 64! 44 58 53
APR-JUL 11.0 29 I 41 59 1 53 71 69
APR-JUL 126 202 1 265 65 1 336 456 405
APR-JUL 52 105 I 140 61 1 175 227 230
APR-JUL 57 97 1 125 61 I 153 191 205
APR-JUL 145 340 I 470 59 1 600 800 800
APR-JUL 133 220 I 280 64 I 340 425 440
APR-JUL 13.4 27 I 37 64 1 47 61 58
APR-JUL 7.4 13.7 1 17.9 72! 22 28 25
APR-JUL 7.0 21 I 30 75 1 39 53 40
APRIL I 5.70 98 I 5.80
MAY 1 15.3 96 1 15.9
JUNE 1 8.0 58 I 13.7
JULY I 2.00 44 1 4.60
I I

Fore'cast Point

Lilylands Reservoir Inlet

Rio Blanco at Blanco Diversion
Navajo River at Oso Diversion
San Juan River nr Carracus
Piedra River nr Arboles
Vallecito Reservoir Inflow
Navajo Reservoir Inflow
Animas River at Durango
Lemon Reservoir Inflow
La Plata River at Hesperus
Mancos River nr Mancos

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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 February I Watershed Snowpack Analysis _ March 1, 2003
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Usable 1 *** Usable Storage *** I Number This Year as % of
Reservoir Capacity! This Last 1 Watershed of =================
1 Year Year Avg I Data Sites Last Yr Average
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GROUNDHOG 21.7 3.8 11.1 12.0 I ANIMAS RIVER BASIN 9 168 73
JACKSON GULCH 10.0 2.6 2.3 4.6 1 DOLORES RIVER BASIN 7 161 83
LEMON 40.0 6.0 12.9 20.4 I SAN MIGUEL RIVER BASIN 5 162 86
MCPHEE 381.2 162.9 206.3 276.3 1 SAN JUAN RIVER BASIN 3 241 71
NARRAGUINNEP 19.0 8.5 18.0 13.5 I TOTAL SAN MIGUEL, DOLORES 23 173 77
VALLECITO 126.0 37.6 56.9 60.8 I AN 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.