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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, 2015

Current Koocanusa Reservoir elevation: 2,410.2 feet
Current Koocanusa Reservoir inflow: ~4,000 cubic feet per second
Current Libby Dam outflow: 4,000 cfs
Current Kootenai River elevation at Bonners Ferry: 1,746.1 feet

The current outflow from Libby Dam is the minimum allowable flow of 4,000 cfs.  The current plan is to hold the outflow at 4,000 cfs and allow the reservoir level to drop slowly. 

Corps' water managers are currently making space in the reservoir to meet the flood risk management elevation of 2,410.0 feet by the end of January.  This elevation requirement was set by the most recent April-August inflow volume forecast of 6.279 million-acre-feet, which is 107 percent of the 1981-2010 average.

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 next summer
Page 2 shows Libby Dam inflow probabilities through next summer
Page 3 shows Libby Dam outflow probabilities through the summer

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