Apr
08
Category:
FOR IMMEDIATE RELEASE
April 8, 2026
Mission Dam Reservoir Operating Update
The Confederated Salish and Kootenai Tribes (CSKT) Safety of Dams Program in collaboration with the Bureau of Indian Affairs Safety of Dams and the Flathead Indian Irrigation Project have implemented a precautionary reservoir management measure at Mission Dam Reservoir to ensure continued public safety and responsible water operations.
Following a thorough engineering review, dam safety professionals recommended a temporary fill restriction due to identified deficiencies of the dam’s spillway. CSKT has developed a temporary restriction in partnership with the Bureau of Indian Affairs Safety of Dams and the Flathead Indian Irrigation Project. This measure is designed to maintain reservoir levels below the point where the spillway would be activated, while still allowing for effective water storage and use throughout the year.
Under the updated guidance:
* During the spring runoff period (April 1 through June 20), reservoir levels will be maintained several feet below the spillway, with additional capacity reserved in wetter years. * During the remainder of the year, reservoir levels will be allowed closer to full, while still maintaining a safety buffer.
This approach reflects standard, risk-informed dam safety practices and allows operators to adjust for changing conditions such as snowpack, temperature, and precipitation forecasts.
“There is no immediate danger to the public,” said Trevor Bras, CSKT Safety of Dams Program Manager. “This is a proactive step to ensure the long-term safety and reliability of the facility while continuing to meet water needs for the community and surrounding resources.”
CSKT will continue to monitor conditions closely and make adjustments as needed. Additional updates will be shared as more information becomes available.
April 8, 2026
Mission Dam Reservoir Operating Update
The Confederated Salish and Kootenai Tribes (CSKT) Safety of Dams Program in collaboration with the Bureau of Indian Affairs Safety of Dams and the Flathead Indian Irrigation Project have implemented a precautionary reservoir management measure at Mission Dam Reservoir to ensure continued public safety and responsible water operations.
Following a thorough engineering review, dam safety professionals recommended a temporary fill restriction due to identified deficiencies of the dam’s spillway. CSKT has developed a temporary restriction in partnership with the Bureau of Indian Affairs Safety of Dams and the Flathead Indian Irrigation Project. This measure is designed to maintain reservoir levels below the point where the spillway would be activated, while still allowing for effective water storage and use throughout the year.
Under the updated guidance:
* During the spring runoff period (April 1 through June 20), reservoir levels will be maintained several feet below the spillway, with additional capacity reserved in wetter years. * During the remainder of the year, reservoir levels will be allowed closer to full, while still maintaining a safety buffer.
This approach reflects standard, risk-informed dam safety practices and allows operators to adjust for changing conditions such as snowpack, temperature, and precipitation forecasts.
“There is no immediate danger to the public,” said Trevor Bras, CSKT Safety of Dams Program Manager. “This is a proactive step to ensure the long-term safety and reliability of the facility while continuing to meet water needs for the community and surrounding resources.”
CSKT will continue to monitor conditions closely and make adjustments as needed. Additional updates will be shared as more information becomes available.