The Bureau of Reclamation is forecasting full pools for four Big Horn Basin reservoirs in their April recent report detailing predicted April-July runoff.

Reclamation’s storage reservoirs in the basin have a combined storage capacity of 2.6 million acre-feet and most of that capacity is attributed to Bull Lake, Boysen and Buffalo Bill reservoirs in Wyoming and Bighorn Lake in Montana. Hydropower is produced at Boysen power plant and four power plants supplied by Buffalo Bill Reservoir in Wyoming and at Yellowtail power plant in Montana.

Bighorn Lake is forecast to be approximately 1,267,000 acre-feet, which is 103% of the 30-year average of 1,235,000. As of April 1, Bighorn Lake was 78% full.

Inflows to Buffalo Bill from the Shoshone River are forecast to be 750,000 acre-feet, which is about 100% of the 30-year average of 748,300. As of April 1, Buffalo Bill Reservoir was 70% full.

Boysen Reservoir — Wind River inflow to Boysen Reservoir is forecast to be 750,000 acre-feet, which is 123% of the 30-year average of 611,000. As of April 1, Boysen Reservoir was 77% full.

Snowmelt runoff into Bull Lake Reservoir from Bull Lake Creek is expected to be 160,000 acre-feet, which is 111% of the 30-year average of 144,200. As of April 1, Bull Lake Reservoir was 50% full.

Reservoirs are considered full when the pool elevation is at top of active conservation or joint-use pool.