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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

Jan. 12, 2017

Current Koocanusa Reservoir elevation: 2,401.3 feet
Current Koocanusa Reservoir inflow: 4,000 cubic feet per second
Current Libby Dam outflow: 20,000 cubic feet per second
Current Kootenai River elevation at Bonner's Ferry, ID: 1,749.5 feet

The daily flow changes for Libby are described below. This operation is to draft the reservoir to target the flood risk management elevation of 2,396.2 feet, set by the January Water Supply Forecast of 6.86 million-acre-feet.

Jan. 12: Outflows increased from 15,000 to 20,000 cfs over two hours starting at 5 a.m. MST.

Jan. 13: Outflows will decrease from 20,000 to 15,000 cfs over two hours starting at 10 p.m. MST.

Jan. 14: Outflows will decrease from 15,000 to 10,000 cfs over five hours starting at 7 p.m. MST.

Jan. 15: Outflows will decrease from 10,000 to 6,500 cfs over five hours starting at 1 a.m. MST.

The Northwest River Forecast Center creates daily forecasts for short term projections throughout the Kootenai and Columbia River Basins.  These forecasts may be updated multiple times in a day and as conditions change.  Links to those forecasts can be found below.

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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