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.=.....sa..........................=.........................................................=...............-.................... SOUTH PLATTE RIVER ~ASIN Streamflow Forecasts - March 1, 2004 ....===........................=.................................................................................................- I <<...... Drier =..... Future Conditions Wetter -....>> 1 II Forecast Point Forecast I .................... Chance Of Exceeding * .....~=............... I Period I 90% 70% 50% (Most Probable) 30% 10% I 30-Yr Avg. I (1000AF) (1000AF) I (1000AF) (% AVG.) I (1000AF) (1000AF) I (1000AF) ..........................=....=_..........................=.........1......................=1.............-.....................-. Antero Reservoir inflow APR-JUL 2.1 3.0 I 3.9 22 I 5.0 1.2 17.5 Spinney Mountain Reservoir inflow APR-JUL 12.0 16.2 I 19.8 35 I 24 33 57 E1evenmile Canyon Reservoir inflow APR-JUL 3.9 12.3 I 18.0 31 I 24 32 59 Cheesman Lake inflow APR-JUL 28 35 I 41 36 I 48 60 114 South Platte River at South Platte APR-SEP 53 100 I 133 52 I 166 215 254 Bear Creek abv Evergreen APR-SEP 6.5 10.4 I 14.4 58 I 19.9 32 25 Bear Creek at Morrison APR-SEP 6.4 11.3 I 16.7 54 I 25 44 31 Clear Creek at Golden APR-SEP 61 86 I 103 77 I 120 145 134 St. Vrain Creek at Lyons APR-SEP 38 53 I 63 75 I 73 88 84 Boulder Creek nr Orode11 APR-SEP 34 43 I 48 91 I S3 62 53 South ~ou1der nr E1dorado Spgs APR-SEP 23 30 I 34 74 I 38 45 46 Big Thompson River at mouth nr Drake APR-SEP 65 82 I 93 80 I 104 121 117 CACHE LaPOUDRE at Canyon Mouth APR-SEP 126 179 I 215 78 I 250 30S 275 .........................._...=........................a...............................--.............=....-................=..... I I .....=...=a=...===...D.=..=.=.=.=.=====..=.=.......==~....-.=......=......==.............=...........................=............ ..* I I Avg I SOUTH PLATTE RIVER BASIN Reservoir Storage (1000 AF) - End of February SOUTH PLATTE RIVER BASIN Watershed Snowpack Analysis - March 1. 2004 ..........................=....-...............--.......=............... ...................................................=..... Usable I Capacity I I *** Usable Storage This Last Year Year Watershed Number of Data Sites This Year as % of Reservoir ....=............ Last Yr Average ANTERO 20.0 0.0 0.0 16.3 BIG THOMPSON BASIN 7 92 75 BARR LAKE 32.0 20.3 13.8 26.0 BOULDER CREEK BASIN 5 82 67 BLACK HOLLOW 8.0 2.0 2.1 3.9 CACHE LA POUDRE BASIN 8 90 72 BOYD LAKE 49.0 31.1 6.0 32.4 CLEAR CREEK BASIN 4 86 82 CACHE LA POUDRE 10.0 3.1 2.6 7.8 SAINT VRAIN BASIN 4 82 57 CAll.TER 108.9 51.0 101. 2 93.4 UPPER SOUTH PLATTE ~ASIN 15 87 65 CHAMBERS LAKE 9.0 5.6 2.0 3.1 TOTAL SOUTH PLATTE ~ASIN 43 87 70 CHEESMAN 79.0 59.4 46.2 59.0 CO~B LAKE 34.0 5.2 2.5 13.9 EtoEVEN MILE 97.8 72.9 44.5 95.8 EMPIRE 38.0 25.0 24.0 25.6 FOSSIL CREEK 12.0 6.0 6.0 7.4 GROSS 41.8 26.0 15.9 25.3 HALLIGAN 6.4 3.7 2.8 4.8 HORSECREEK 16.0 12.6 1.1 12.5 HORSETOOTH 149.7 120.4 20.4 109.2 JACKSON 35.0 23.5 23.5 27.3 JULESBURG 28.0 15.3 16.9 18.9 LAKE LOVELAND 14.0 10.4 8.1 8.8 LONE TREE 9.0 8.0 6.6 6.7 MARIANO 6.0 1.0 0.5 4.3 MARSHALL 10.0 6.1 3.5 5.4 MARSTON 13.0 14.3 13.4 12.9 MILTON 24.0 11.6 3.0 17.1 POINT OF ROCKS 70.0 45.8' 25.0 65.4 PREWITT 33.0 7.7 5.1 21.0 RIVERSIDE 63.1 43.3 30.6 48.9 SPINNEY MOUNTAIN 48.7 20.6 13.2 32.2 STANDLEY 42.0 38.8 20.7 33.6 TERRY LAKE 8.0 5.8 1.4 5.3 UNION 13.0 10.2 6.0 11.0 WINDSOR 19.0 9.1 0.4 11.5 ...............................................-.................................................................................. * 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,;