Yellowtail Dam and Bighorn Lake Long Term Issues
RECLAMATION Managing Water in the West Yellowtail Dam & Bighorn Lake Long Term Issues Group Boysen Buffalo Bill Bull Lake YELLOWTAIL DAM, BIGHORN LAKE and AFTERBAY Yellowtail Afterbay Dam Substation Visitor Center Yellowtail Dam YELLOWTAIL DAM, BIGHORN LAKE AND AFTERBAY Yellowtail Unit • Authorization: Flood Control Act of Dec. 22, 1944 (ch.665 Stat. 887) Senate Document 191—USACE/Reclamation plan for Missouri River Basin Development • Project Purposes – Flood Control – Hydropower – Irrigation – Recreation – Fish & Wildlife – Sediment storage Yellowtail Unit Project Purposes- Flood Control (Exclusive flood storage = 259K af), Coordinated with U.S. Army Corps of Engineers Bighorn Canyon National Recreation Area Authorization: Public Law 89-664, October 15, 1966 Purpose “In order to provide for public outdoor recreation use and enjoyment of the proposed Yellowtail Reservoir and lands adjacent thereto in the States of Wyoming and Montana by the people of the United States….” BIGHORN RESERVOIR ALLOCATIONS Dam Crest Maximum Water Surface or Top of Surcharge Elev. 3660.00 (1,381,189 Acre-Feet) Elev. 3660.0 SURCHARGE - 52,829 Acre-Feet Top of Exclusive Flood Elev. 3657.00 (1,328,360 AF) EXCLUSIVE FLOOD CONTROL - 258,331 Acre-Feet Top of Joint Use Elev. 3640.00 (1,070,029 Acre-Feet) JOINT USE - 240,342 Acre-Feet Top of Active Conservation Elev. 3614.00 (829,687 Acre-Feet) Spillway crest Elev. 3593.00 ACTIVE CONSERVATION - 336,103 Acre-Feet FISH WILDLIFE RECREATION AGRICULTURE POWER MUNICIPAL INDUSTRIAL Top of Inactive Elev. 3547.00 (493,584 Acre-Feet) Powerplant Penstock Elev. 3450.00 INACTIVE CONSERVATION - 477,576 Acre-Feet Irrigation Outlet Elev. 3400.00 River Outlet Elev.
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