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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

April 20, 2017

Current Koocanusa Reservoir elevation: 2,367.8 feet
Current Koocanusa Reservoir inflow: ~ 12,000 cubic feet per second
Current Libby Dam outflow: 23,200 cubic feet per second
Current Kootenai River elevation at Bonner's Ferry, ID: 1,756.8 feet

Libby Dam will continue to release powerhouse capacity, approximately 23,000 cfs, through the end of the month.


The current water supply forecast for the April -Aug inflow volume for April is 7.654 million-acre-feet (130% of average) and the target end of month elevation for Libby Dam is 2,325.4 ft. The current operation is consistent with the VarQ flood risk management operation and Seattle District will continue to re-evaluate operations through the Spring to try and minimize the flood risk downstream of Libby Dam.  The current projection is that the end of month elevation will likely be between 2,358 and 2,363 ft. Next week the flood risk will the re-assessed and an update will be provided.

Short term forecasts for Libby Dam elevations and inflows:

Short term forecasts for Libby Dam outflow:

Additionally, projected inflows and reservoir operations at Libby Dam through next summer can be found here:

These modeling results are updated at least monthly and include information on elevations, inflow, and outflow:

Page 1 shows Lake Koocanusa elevation probabilities through the summer
Page 2 shows Libby Dam outflow probabilities through the summer
Page 3 shows Lake Koocanusa elevation probabilities for a given date
Page 4 shows Bonners Ferry stage probabilities through the summer
Page 5 shows Bonners Ferry maximum stage probabilities for the year

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