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...=.=.....~........==.........._..__..................................=..=...=......................=.~........=................. SOUTH PLATTE RIVER BASIN Streamflow Forecasts - June 1, 2004 ==.........=......-..=..........=..................................................................=...............=.............. Wetter .....>> I I ..........g......... Chance Of Exceeding * =.aa....=.....~..===.. I 50% (Most Probable) 30% 10% I 30-)[r Avg. I (1000AF) (% AVG.) I (1000AF) (1000AF) I (1000AF) ~...=..a=a=..~..............===.=..D=....==......................... ..=....~...==.===.....=I.....=.=..............._=............ 3.9 22 I 5.0 7.1 17.5 19.7 35 I 24 30 57 18.0 31 I 23 30 59 40 35 I 46 56 114 130 51 I 158 199 254 7.6 48 I 9.6 13.6 16,0 7.1 40 I 9.2 13.4 17.7 73 55 I 82 95 134 56 67 I 64 76 84 37 70 I 40 43 53 31 68 I 35 42 46 81 69 I 89 101 117 190 69 I 215 255 275 Forecast Point Forecast Period Antero Reservoir inflow Spinney Mountain Reservoir inflow Elevenmile Canyon Reservoir inflow Cheesman Lake inflow South Platte River at South Platte Bear Creek abv Evergreen Bear Creek at Morrison Clear Creek at Golden St. Vrain Creek at Lyons Boulder Creek nr Orodell South Boulder nr Eldorado Spgs Big Thompson River at mouth nr Drake CACHE LaPOUDRE at Canyon Mouth APR-JUL APR-JUL APR-JUL APR-JUL APR-SEP .JUN-SEP JUN-SEP APR-SEP APR-SEP APR-SEP APR-SEP APR-SEP APR-SEP Future Conditions <<...... Drier ...... 90% (1000AF) 2.1 12.8 5.9 29 61 4.3 3.8 51 36 31 20 61 126 70% (1000AF) 3.1 16.5 13.1 35 102 6.0 5.5 64 48 34 27 73 164 ......=...................=........_=....................==..........=..................=............c....=.~...=.=.=............. SOUTH PLATTE RIVER BASIN Reservoir Storage (1000 AF) - End of May SOUTH PLATTE RIVER BASIN watershed Snowpack Analysis - June 1, 2004 Reservoir .......................................................................=.......................................................... Average Usable I Capacity I *** Usable Storage *** This Last )[ear )[ear Avg Watershed Number of Data Sites This )[ear as % of Last )[r ==..=====..............==.......==.======............................... .......=................................................. ANTERO 20.0 1.0 0.0 16.0 BIG THOMPSON BASIN 3 3 2 BARR LAKE 32.0 20.0 31.0 27.7 BOULDER CREEK BASIN 3 66 30 BLACK HOLLOW 8.0 2.7 3.0 4.4 CACHE LA POUDRE BASIN 2 29 29 BOm LAKE 49.0 27.2 18.9 40.0 CLEAR CREEK BASIN 2 10 5 CACHE LA POUDRE 10.0 5.2 9.0 9.1 SAINT VRAIN BASIN 1 0 0 CARTER 108.9 75.2 92.4 100.2 UPPER SOUTH PLATTE BASIN 6 0 0 eHAMBERS LAKE: 9.0 3.5 6.0 5.8 TOTAL SOUTH PLATTE BASIN 17 21 13 CHEESMAN 79.0 66.6 60.0 66,2 COBB LAKE 34.0 5.0 4.0 14,7 ELIirVEN MILE 97 .8 79.4 46.1 97.1 E1-IPIRE 38.0 14.9 19.1 30,7 FOSSIL CREEK 12.0 6.0 8.2 8.0 GROSS 41.8 22.2 18.6 28.8 HALLIGAN 6.4 6.2 6.4 6.0 HORSECREEK 16.0 0.0 14.4 14.1 HORSETOOTH 149.7 138.3 32.8 123.2 JACKSON 35.0 22.2 24.2 30.6 JULESBURG 28.0 17.5 18.6 21.5 LAKE LOVELAND 14.0 12.1 12,1 11.0 LONE TREE 9.0 8.9 8.7 8.6 MARIANO 6.0 2.3 5.6 5.4 MARSHALL 10.0 8.2 9.6 8.2 MARSTON 13.0 5.2 19.3 15.3 MILTON 24.0 18.0 21.7 19,3 POINT OF ROCKS 70.0 45.0 55.8 66.3 PREWITT 33.0 6.7 19.4 26.7 RIVERSIDE 63.1 34.3 44.7 56.0 sPtNNB)[ MOUNTAIN 48.7 20.9 12.9 35.6 STANDLE)[ 42.0 41.2 35.4 36.8 TBRR)[ LAKE 8.0 6.0 6.8 7.0 UNION 13.0 9.8 9.6 12.2 WINDSOR 19.0 9.3 8.3 15.0 a.o......_...__......~........a......................................................._........_.....~~........................... . 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.