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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

Sept 30, 2014

Current Koocanusa Reservoir elevation: 2,447.4 feet
Current Koocanusa Reservoir inflow: ~4,000 cubic feet per second
Current Libby Dam outflow: 6,000 cfs
Current Kootenai River elevation at Bonners Ferry: 1,747.1 feet

Libby Dam releases will be reduced from 6,000 to 5,000 cfs Oct. 1 over at two-hour period starting at 10 p.m. MDT.  Releases will be further reduced from 5,000 to 4,100 cfs Oct. 2.  The release of 4,100 to 4,000 cfs will likely be held for most of October.

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

Short term forecasts for Libby Dam elevations and inflows can be found here:

Short term forecasts for Libby Dam releases can be found here:

Short term forecasts for Bonners Ferry can be found here:

Please note the National Weather Service's disclaimer on forecasts after 3 days.  All forecasts and model projections are based on the best information at the current time, as the weather changes so will the short and long-term predictions.

Libby Dam Operations and associated probabilities for Libby Dam and Bonners Ferry for this spring and summer can be found here:

These modeling results are updated at least weekly and include information on elevations, outflow, and Bonners Ferry seasonal elevation and peak height for the year.  Key pieces of information on these plots include things like:

Page 1 shows Lake Koocanusa elevation probability through the summer.
Page 2 shows Libby Dam Outflow probability through the summer.
Page 3 shows Lake Koocanusa elevation probability for a given date.
Page 4 shows Libby Dam Spill probability through the summer.
Page 5 shows Bonners Ferry Stage probability through the summer.
Page 6 shows Bonners Ferry peak stage probability for the year.

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