June 14, 2025

Streamflow Runoff Forecasts for the Flathead Basin Decrease Significantly

Polson, Montana — Unseasonably warm and dry conditions have significantly decreased water

supply in the Flathead River Basin and spring runoff is quickly receding bringing river flows to

extremely low levels. With the dry hydrologic forecasts for the remainder of 2025 will be the

third year in a row of abnormally hot and dry conditions. The three years combined will be the

driest consecutive years ever recorded for the Flathead Basin. These conditions have forced

operations at SKQ to again be at license required minimums and filling Flathead Lake as

aggressively as possible while avoiding flood control limits. In spite of these operational

sacrifices by EKI, the melted snow remaining will not get Flathead Lake to full pool. Current

forecasts have the lake reaching its maximum for the year of 2892.3 feet on June 19 then

beginning to slowly recede to 2891.5 on July 12, 2025. Full pool is 2893.

 

SKQForecastInfoSlides_2025-06-05

“These unprecedented dry conditions are not only taxing on resources they are also extremely

impactful to generation of electricity from the SKQ facility,” said Brian Lipscomb, EKI CEO.

“Electricity generation from the SKQ facility will be 10 percent below normal for this year, add

that to the two years that we have just experienced, and this will put us at 393 GWh of electricity

generation below normal. That is enough electricity to power between 33,000 and 41,000 homes

or a city about the size of Missoula for a year.”

Energy Keepers Inc. responded to these emerging conditions in early spring and began

coordinating with its partners while implementing the license-required Drought Management

Plan. On March 13, the U.S. Army Corps of Engineers approved a deviation request to allow

EKI to capture as much run-off as possible rather than the full winter draft requirement. These

actions protect lower Flathead River minimum flows while filling Flathead Lake as early as

possible. As much runoff as possible was captured bringing lake elevations to 3 feet from full

pool on May 26. Dam operators have maintained minimum flows since then.

“In early March, we approved a deviation for EKI because we were trying to avoid impacts to

the community who relies on Flathead Lake,” said Leah Hamilton, Northwestern Division

Reservoir Control Center water regulator. “Our goal was to coordinate actions to increase the

chance of refill as early as possible while balancing needs for flood risk management; however,

it’s also important to understand how much weather influences refill Pacific Northwest lakes and

reservoirs,” she said. “Every water year is different, and there is a lot of uncertainty in trying to

accurately predict runoff several months into the future.”

While recreational boating and fishing can continue at any lake elevation with the accessible

public boat ramps, lake users should be aware that lakefront boat storage and dock access may be

affected if these water level forecasts are realized. As forecasts are updated through the months

of June and July EKI will update the public to any changes.

Please see updated forecasts on Flathead Lake levels with inflows and outflows at:

https://energykeepersinc.com/flathead-lake-data/

About Energy Keepers, Inc

Energy Keepers, Inc (EKI) is a federally chartered corporation created and wholly owned by

the Confederated Salish and Kootenai Tribes (CSKT) of the Flathead Reservation, pursuant to

Section 17 of the Indian Reorganization Act of 1934. As well as developing economically, the

CSKT are nationally recognized as a leader amongst Tribal nations for exercising their sovereign

powers to preserve and protect cultural, wildlife and natural resources of their traditional

homeland now and for future generations. CSKT and EKI are the co-licensees of FERC Project

No. 5, the Seli’š Ksanka Qlispe’ Project located on Tribal Land six miles below the natural outlet

of Flathead Lake on the Lower Flathead River.

 

 

Robert McDonald

CSKT Communications Director

Robert.mcdonald@cskt.org

406.249.1818

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