Big Horn Lake inflow predicted to be 38%

WASHINGTON – The Bureau of Reclamation’s May forecast of the May through July water runoff predicted for the Big Horn River Basin is as follows:

Big Horn Lake – Big Horn River May through July inflow to Big Horn Lake is forecast to be approximately 407,000 acre-feet (af), which is 38% of the 30-year average of 1,061,000 af.  As of May 1, Big Horn Lake was 78% full.

Buffalo Bill Reservoir - Shoshone River May through July inflow to Buffalo Bill Reservoir is forecast at 450,000 af, which is 64% of the 30-year average of 705,000 af. As of May 1, Buffalo Bill is 68% full.

Boysen Reservoir - Wind River May through July inflow to Boysen Reservoir is forecast at 160,000 af, which is 29% of the 30-year average of 553,400 af. As of May 1, Boysen Reservoir is 71% full.

Bull Lake Reservoir - May through July snowmelt runoff into Bull Lake Reservoir from Bull Lake Creek is expected to be 100,000 af, which is 72% of the 30-year average of 139,500 af. As of May 1, Bull Lake Reservoir is 33% full.

A reservoir is considered “full” when the pool elevation is at top of active conservation or joint-use pool. The percentage is based on total reservoir volume below that level.

For additional information on Buffalo Bill, Boysen and Bull Lake reservoirs, contact Wyoming Area Manager Lyle Myler at 307-261-5671. For additional information on Big Horn Lake, contact Montana Area Manager Ryan Newman at 406-247-7298.