US Army Corps of Engineers
Seattle District


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

March 11, 2019

Current Koocanusa Reservoir elevation: 2407.3 feet
Current Koocanusa Reservoir inflow: ~2 kcfs
Current Libby Dam outflow: 10 kcfs
Current Kootenai River elevation at Bonners Ferry: 1746.7 feet

Libby Dam will decrease outflows from 10 kcfs to 4 kcfs over four days, starting on Monday evening, 3/11. Detailed flow changes are listed below.

Scheduled flow changes from Monday (3/11) to Friday (3/15) are as follows:
Date                                     Time MDT      Change               Flows
Monday, 3/11                       21-24            decrease             10 kcfs to 8 kcfs
Tuesday, 3/12                      21-24            decrease             8 kcfs to 6.5 kcfs
Wednesday, 3/13                 21-24            decrease             6.5 kcfs to 5 kcfs
Thursday, 3/14                     22-24            decrease             5 kcfs to 4 kcfs
Friday, 3/15                          00-24            constant              4 kcfs 

After Thursday (3/14), outflow from Libby dam will remain at 4 kcfs. The March Water Supply Forecast sets the end-of-March pool target at 2441.3 ft, which is above the current pool. It is expected that the Libby pool elevation will continue to decrease gradually during March due to low inflows.

Short term forecasts for Libby Dam elevations and inflow:

Short term forecasts for Libby Dam outflow:

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