Colorado Basin Outlook Report March 1 2005

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UPPER COLORADO R UPPER COLORADO RIVER BASIN Reservoir Storage (1000 AF) - End of February VER BASIN Usable I Stream£low Forecasts March 1, 2005 Capacity This Drier Forecast Point Forecast Year Chance Of Exceeding • __ Period 90% 70% 50% 30% (1000AF) (1000AF) Lake Granby Inflow APR -JUL 140 168 Willow Creek Reservoir Inflow APR -JUL 36 46 Williams Fork Reservoir inflow APR -JUL 56 67 - Dillon Reservoir Inflow APR -JUL 71 103 Green Mountain Reservoir inflow APR -JUL 180 209 Muddy Creek blw Wolford Mtn. Resv. APR -JUL 25 35 Eagle River blw Gypsum APR -JUL 187 235 Colorado River nr Dotsero APR -JUL 635 940 Ruedi Reservoir Inflow APR -JUL 79 99 Roaring Fork at Glenwood Springs APR -JUL 500 615 Colorado River nr Cameo APR -JUL 1220 1710 UPPER COLORADO RIVER BASIN Reservoir Storage (1000 AF) - End of February VER BASIN Usable I * ** Usable Storage * ** March 1, 2005 Capacity This Last Future Conditions = _____= Wetter Year Chance Of Exceeding • __ ____________________ DILLON - 250.8 50% 30% 10% 30 -Yr Avg. (1000AF) (% AVG.) (1000AF) (1000") (1000AF) 190 84 ' 215 259 225 53 104 ( 61 74 51 75 79 84 97 95 125 75 147 178 167 230 82 252 286 280 45 75 58 82 60 275 82 322 405 335 1150 80 1360 1670 1440 115 82 134 168 141 700 99 790 933 710 2050 85 2390 2880 2420 UPPER COLORADO RIVER BASIN Watershed Snowpack Analysis - March 1, 2005 Number === =This Year as % of Watershed of Data Sites Last Yr Average BLUE RIVER BASIN 9 103 81 UPPER COLORADO RIVER BASI 37 109 86 MUDDY CREEK BASIN 4 108 82 PLATEAU CREEK BASIN 3 150 164 ROARING FORK BASIN 8 129 113 WILLIAMS FORK BASIN 4 92 78 WILLOW CREEK BASIN - 4 135 100 TOTAL COLORADO RIVER BASI 48 118 98 * 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. Usable I * ** Usable Storage * ** Reservoir Capacity This Last Year Year Avg DILLON - 250.8 200.7 218.6 216.8 LAKE GRANBY 465.6 132.5 198.2 281.1 GREEN MOUNTAIN 139.0 66.6 59.6 70.0 HOMESTAKE 43.0 34.9 21.9 26.6 RUEDI 102.0 67.1 62.2 68.0 VEGA 32.0 16..0 10.9 12.2 WILLIAMS FORK • 96.8 51.0 57.8 57.3 WILLOW CREEK 9.0 8.3 7.2 6.7 UPPER COLORADO RIVER BASIN Watershed Snowpack Analysis - March 1, 2005 Number === =This Year as % of Watershed of Data Sites Last Yr Average BLUE RIVER BASIN 9 103 81 UPPER COLORADO RIVER BASI 37 109 86 MUDDY CREEK BASIN 4 108 82 PLATEAU CREEK BASIN 3 150 164 ROARING FORK BASIN 8 129 113 WILLIAMS FORK BASIN 4 92 78 WILLOW CREEK BASIN - 4 135 100 TOTAL COLORADO RIVER BASI 48 118 98 * 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.