The Mystic Lake Hydroelectric Project is located on West Rosebud Creek, in Stillwater and Carbon counties about 75 miles southwest of Billings, in southern Montana. The project began operation in 1925 and received its last operating license in 2007 and became the first project to do so using the Federal Energy Regulatory Commission’s Integrated Licensing Process (ILP.) Updated in 2020.
This hydropower license includes nine developments, of which eight were constructed between 1906 and 1930, and the ninth- the Cochrane dam- began operation in 1958. The projects are spread over 324 river-miles on the Missouri and Madison rivers.
The City of Hyrum owns and operates the project, which was originally constructed in 1931. The project is located in the Blacksmith Fork Canyon within the Wasatch Cache National Forest and is operated in run-of-river mode.
Snake River is the largest tributary of the Columbia River and is more than 1,000 miles long. The Snake River has more than 23 dams on its mainstem making it one of the most dammed rivers in the Northwest. The river is used for power generation, water supply and irrigation.
The project, yet to be constructed but licensed in Jan 2012, would be located on the Gibson dam, owned by the Bureau of Reclamation and located inside the Lewis and Clark National Forest in Lewis and Clark and Teton Counties in Montana.