Mystic Lake P-2301

General information
Waterway	West Rosebud Creek
Current status	Active license
Type of facility	Conventional Hydro
Mode of hydropower generation	Reregulating
Type of permit	FERC License
FERC information
FERC docket #	P-2301
FERC project name	Mystic Lake
Permit issued	12/12/07
Permit expiration	12/27/50
Ownership and operation
Owner	Northwestern Coporation
Owner type	Wholesale Power Marketer
Year first online (conventional hydro)	1925
Transmission or distribution system owner	NorthWestern Energy LLC - (MT)
Power and generating capacity
Number of units	2
Total capacity from hydraulic turbine-generator units within each plant	12.0 MW
Average annual net hydropower generation	50,622.2 MWH

Download license summary for the Mystic Lake project.

The project is located on West Rosebud Creek, in Stillwater and Carbon counties, Montana. The project occupies 673.54 acres and is located entirely within Custer National Forest owned by US Forest Service.

The Mystic Lake Project has two reservoirs: Mystic Lake, created by Mystic Lake dam, also the storage reservoir; and the West Rosebud Lake, impounded by Re-regulation dam, located downstream. West Rosebud Lake is used to moderate peaking flows from the powerhouse.