MT

Rainbow P-2188

General information

Waterway  Missouri River
Current status  Active 
Type of facility Conventional Hydro
Mode of hydropower generation Run-of-river/Upstream Peaking
Type of permit FERC License

FERC information

FERC docket # P-2188
Permit issued 9/22/2000
Permit expires 8/27/2040

Ownership and operation

Owner Northwestern Coporation
Owner type Wholesale Power Marketer
Year first online (conventional hydro) 2013
Transmission or distribution system owner NorthWestern Energy LLC - (MT)

Power and generating capacity

Number of units 1
Total capacity from hydraulic turbine-generator units within each plant 59.0 mW
Average annual net hydropower generation 275,733.7 mWH

Download license summary for the Missouri-Madison projects.

The Missouri-Madison project consists of nine developments on the Madison and Missouri Rivers in Gallatin, Madison, Lewis and Clark, and Cascade Counties, in southwestern Montana.

The Missouri-Madison Hydroelectric Project develops hydropower on a 324-mile stretch of the Madison and Missouri Rivers.[1] The Madison River combines with the Gallatin and Jefferson Rivers[2] to form the Missouri River, which flows north toward the City of Great Falls, Montana. The Hebgen and Madison Developments are located on the Madison River. The other seven developments (Hauser, Holter, Black Eagle, Rainbow, Cochrane, Ryan, and Morony) are located on the Missouri River, downstream from the Bureau of Reclamation’s Canyon Ferry Hydroelectric Project. The last five developments are clustered near and downstream of the City of Great Falls. All nine developments have dams. Eight of the nine developments have power generating facilities, while the Hebgen Development is used as a storage facility.



[1]The nine developments are located between river miles 40 and 103 of the Madison River, and between river miles 2,105 and 2,237 of the Missouri River.

[2]These rivers were explored by Captains Meriwether Lewis and William Clark during their epic journey of 1804-1806. James Madison was at that time serving as Secretary of State in President Thomas Jefferson’s cabinet, while Albert Gallatin was Secretary of the Treasury.

 

Milestones

License Application Filed 11-25-1992
FEIS Issued 09-01-1999
License Issued 09-27-2000