US Army Corps of Engineers
Seattle District Website


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

July 22, 2021

Current Koocanusa Reservoir elevation: 2453.86 feet
Current Koocanusa Reservoir inflow: ~8.9 kcfs
Current Libby Dam outflow: 7.5 kcfs
Current Kootenai River elevation at Bonners Ferry: 1746.53 feet
Current Changes and Highlights:
- Libby dam outflows will decrease to 7.0 kcfs on Friday July 23rd at 00:00 MDT.
Libby Dam outflows will decrease to 7.0 kcfs and continue the refill of Lake Koocanusa. Inflows into Libby Dam will continue to be monitored and outflows of 7.0 kcfs will be held until the end of August. Outflows in September will likely be adjusted to draft to the end of month elevation target of 2449 ft.
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: