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

May 13, 2019 at 10:30

Current Koocanusa Reservoir elevation: 2410.2 feet
Current Koocanusa Reservoir inflow: ~22 kcfs
Current Libby Dam outflow: 15 kcfs
Current Kootenai River elevation at Bonners Ferry: 1753.38 feet

Current Changes and Highlights:
- Libby Dam outflow will increase to 18 kcfs Tuesday morning.

Libby Dam releases are ramping up as inflows increase. Libby Dam outflow will increase from 15 kcfs to 18 kcfs over one hour on Tuesday morning (5/14), beginning at 0700 MDT.

The Libby water supply forecast for May was released on May 3rd; it is 4983 KAF (85% of average) for the Apr-Aug inflow volume. Based on this forecast, this is a Tier 2 year with a sturgeon augmentation volume of 0.8 MAF. The tiered bull trout minimum flow between the completion of the sturgeon pulse and 31 August will be 7 kcfs. The May VarQ flow for Libby determined by this forecast is 18.0 kcfs.  Since the May VarQ flow is 18.0 kcfs, releases will likely remain constant until sturgeon augmentation begins.

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 the fall can be found here: