small brandlHydroelectric Facilities Acquisition
 

NorthWestern Energy has entered into an agreement to purchase and operate PPL Montana’s 11 hydroelectric facilities that have a total generating capacity of 633 megawatts, as well as one reservoir. Check out the press release for details of the announcement.

 
Here are the facilities:

 
Thompson Falls
on the Clark Fork River about 100 miles northwest of Missoula: Thompson Falls Dam is a seven-unit hydroelectric plant on the Clark Fork River in Thompson Falls. The units have a total generating capacity of 94 megawatts. It one of the two dams west of the continental divide.

 

 



Madison Dam
is a four-unit hydroelectric plant on the Madison River at the head of Bear Trap Canyon, about 10 miles north of Ennis, Mont. The units have a total generating capacity of 9 megawatts.

 
 

South of Madison Dam, just north of the Idaho border near Yellowstone National Park, is our Hebgen Lake storage reservoir, which is used to store water from a 905-square-mile drainage area at the headwaters of the Madison-Missouri river system, home to eight  Montana hydroelectric plants — Black Eagle, Cochrane, Hauser, Holter, Madison, Morony, Rainbow and Ryan. Hebgen is used to regulate the flow of water into the Madison-Missouri system.

 

Hauser Dam
is a six-unit hydroelectric plant on the Missouri River, about 14 miles northeast of Helena, Mont. The units have a total generating capacity of 19 megawatts.

 
 


Holter Dam
is a four-unit hydroelectric plant on the Missouri River, about 43 miles northeast of Helena, Mont. The units have a total generating capacity of 48 megawatts. It is considered a “run-of-river” project because it can generate electricity using the water that flows down the river, without the need to store additional water supplies.

 


Black Eagle Dam
is a three-unit hydroelectric plant at Black Eagle Falls on the Missouri River, about two miles downstream from Great Falls, Mont. The units have a total generating capacity of 21 megawatts.

 
 


The Rainbow Dam hydroelectric plant is located on the Missouri River, about 6 miles northeast of Great Falls, Mont. A new single-unit, 60-megawatt powerhouse was completed in early 2013, increasing the hydroelectric facility’s generating capacity by 70 percent. The new powerhouse replaces an eight-unit, 35-megawatt facility.  

 



Cochrane Dam
is a two-unit hydroelectric plant on the Missouri River, about eight miles downstream from Great Falls, Mont. The units have a total generating capacity of 64 megawatts.

 



Ryan Dam
is a six-unit hydroelectric plant on the Missouri River, about 10 miles downstream from Great Falls, Mont. The units have a total generating capacity of 60 megawatts.

 


Mystic Lake Dam is a two-unit hydroelectric plant on the West Rosebud Creek in the Beartooth Mountains, about 75 miles southwest of Billings, in southern Montana. Mystic Lake Dam is classified as a “storage generation” project because it uses the water stored in its reservoir to generate electricity.

 



Morony
, a two-unit hydroelectric plant on the Missouri River, about 15 miles northeast of Great Falls is one of the eight hydroelectric plants and one reservoir along the Missouri and Madison Rivers.

 

Click here to download the project fact sheet.

Click here to get answers to commonly asked questions regarding the acquisition.

 To get more information regarding this specific project, call (888) 467-2669 or email corp_comm@northwestern.com.

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