Streamflow
The following 50 percent chance stream flow yields are for the April
through September period. Smiths Fork near Border is estimated to yield
98,000 acre-feet (83 percent of normal), and Thomas Fork drainage near the
Idaho-Wyoming state line is estimated to yield 24,000 acre-feet or 67
percent of normal. Bear River near the Utah-Wyoming State Line is expected
to yield about 101,000 acre feet; that is 80 percent of average, while Bear
River near Woodruff is expected to yield about 114,000 acre-feet, about 74
percent of normal.
================================================================================================================================== UPPER BEAR RIVER BASIN Streamflow Forecasts - March 1, 2000 ================================================================================================================================== | <<====== Drier ====== Future Conditions ======= Wetter =====>> | | | Forecast Point Forecast | ==================== Chance Of Exceeding * ====================== | Period | 90% 70% | 50% (Most Probable) | 30% 10% | 30-Yr Avg. | (1000AF) (1000AF) | (1000AF) (% AVG.) | (1000AF) (1000AF) | (1000AF) ====================================================================|=======================|===================================== SMITHS FK nr Border, WY APR-SEP 70 86 | 98 83 | 112 137 118 | | THOMAS FK nr WY-ID State Line (Disc. APR-SEP 14.1 19.3 | 24 67 | 30 41 36 | | Bear R nr UT-WY State Line APR-SEP 75 89 | 101 80 | 114 137 126 | | BEAR R nr Woodruff, UT APR-SEP 63 90 | 114 74 | 144 205 154 | | ================================================================================================================================== UPPER BEAR RIVER BASIN | UPPER BEAR RIVER BASIN Reservoir Storage (1000 AF) - End of February | Watershed Snowpack Analysis - March 1, 2000 ================================================================================================================================== Usable | *** Usable Storage *** | Number This Year as % of Reservoir Capacity| This Last | Watershed of ================= | Year Year Avg | Data Sites Last Yr Average ========================================================================|========================================================= WOODRUFF NARROWS 57.3 50.0 46.5 --- | UPPER BEAR RIVER in Utah 7 89 91 | | SMITHS & THOMAS FORKS 4 79 86 | | BEAR RIVER abv ID line 9 80 86 | ================================================================================================================================== ? 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 1961-1990 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.