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Libby Dam

17877 Highway 37

Libby, Montana 59923-7828

Libby Dam Office (406) 293-7751 

Kootenai River Levels Recording (406) 293-3421

For Visitor Information contact the Visitor Center (406) 293-5577

 

 

Libby Dam

Libby Dam Project is a multi-purpose water resource development.  Its purposes are flood reduction, hydropower, recreation, and environmental stewardship. We recognize that our day to day activities in operating a facility such as Libby Dam have a direct impact on the environment. Our goal is to operate Libby Dam to minimize negative impacts on the environment through pollution prevention and mitigation, and we are committed to continual improvement.  Our commitment is to comply with environmental legislation, rules, and regulations. We encourage environmental stewardship at every level throughout the organization.

Flow Update

June 9, 2017

Current Koocanusa Reservoir elevation: 2,417.3 feet (Full Pool is 2459 feet)
Current Koocanusa Reservoir inflow: ~ 51,000 cubic feet per second
Current Libby Dam outflow: 25,000 cubic feet per second
Current Kootenai River elevation at Bonner's Ferry, ID: 1,760.3 feet  

Libby Dam outflows will be decreased from 25,000 to 22,000 cfs at 11 p.m. MDT June 11.  Flows will be further decreased to 20,000 cfs at 11 p.m. MDT June 12. This operation begins the descending limb of the Sturgeon Pulse. The sturgeon operation does try to limit releases from Libby Dam to keep the stage at Bonners Ferry, Idaho, below the flood stage of 1,764 feet. The Water Management Section will monitor dam operations along with the stage at Bonners Ferry to try and stay below flood stage. The Water Management Section is also coordinating Libby Dam operations with BC Hydro to address concerns in Canada in and around Kootenay Lake.

Sturgeon flow augmentation began May 15, as local Kootenai River tributaries downstream of Libby Dam were forecasted to peak.  Outflows were decreased from powerhouse capacity to 18,000 cfs May 21.  A second pulse of up to powerhouse capacity flows started on June 2.

The current water supply forecast for the April -Aug inflow volume for June is 7.594 million-acre-feet, or 129 percent of average.  Additionally, the forecast sets the Bull Trout minimum after the sturgeon pulse to 9,000 cfs, and the sturgeon volume for this year to 1.2 million-acre-feet, which is a Tier 5 year.

Short term forecasts for Libby Dam elevations and inflows:
http://www.nwrfc.noaa.gov/river/station/flowplot/flowplot.cgi?lid=LYDM8 

Short term forecasts for Libby Dam outflow:
http://www.nwrfc.noaa.gov/river/station/flowplot/flowplot.cgi?lid=KBDM8

Additionally, projected inflows and reservoir operations at Libby Dam through next summer can be found here:
http://www.nws.usace.army.mil/About/Offices/Engineering/HydraulicsandHydrology/OperationalProjections.aspx

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