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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

Nov. 19, 2015

Current Koocanusa Reservoir elevation: 2,440.1 feet
Current Koocanusa Reservoir inflow: ~6,600 cubic feet per second
Current Libby Dam outflow: 16,000 cfs
Current Kootenai River elevation at Bonners Ferry: 1,750.5 feet

Outflow will decrease from 16,000 to 12,000 cfs over a three hour period starting at 8 p.m. MST today.  Flows will further decrease Friday, from 12,000 to 8,000 cfs, beginning at 3 a.m. MST.

Saturday, Nov. 21, flows will decrease from 8,000 to 6,000 cfs beginning at 1 a.m. MST.  Releases will be held at 6,000 cfs on Sunday, Nov. 22.

Flows increase to 11,000 cfs over three hours starting at 6 a.m. MST, Nov. 23, before decreasing to 9,000 cfs at 10 p.m.

The current plan is to continue load shaping at the beginning of next week and reduce flows over Thanksgiving and the following weekend.  The reserviour is expected to be drafted to 2,437 feet by the end of November.

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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