Avista is reducing water releases from Post Falls Dam to the federally mandated minimum this week as Lake Coeur d’Alene’s water levels decline due to hot, dry conditions affecting North Idaho and the broader Panhandle region. The utility will lower releases to 500 cubic feet per second, the floor set by the U.S. Federal Energy Regulatory Commission under Avista’s operating license for the facility.
Why Water Releases Are Being Cut
The reduction follows standard protocol outlined in Avista’s federal license, which requires the utility to balance lake management with river flow requirements during periods of low water availability. Idaho Department of Environmental Quality and the Washington Department of Ecology both weighed in on the decision, which aligns with typical late-summer adjustments as Lake Coeur d’Alene reaches seasonal low-water thresholds.
Elevated temperatures and minimal precipitation have depleted the lake’s reserve capacity. Similar conditions forced comparable cutbacks in 2025, signaling a pattern that water managers expect may recur as regional drought conditions persist into the remainder of summer.
Impact on the Spokane River and Local Water Users
The reduced flow carries particular implications for the Spokane River upstream of Sullivan Road, where low-water conditions can stress fish habitat and limit recreational use. Downstream of Post Falls, the river’s ability to sustain aquatic life and support recreational activities depends partly on consistent flow from the dam, though the 500-cubic-feet-per-second release represents the minimum necessary to maintain basic ecological function under federal standards.
Jaime Short, the Washington Department of Ecology’s Eastern Region Water Resources Program section manager, emphasized the broader conservation imperative. “Every drop counts during dry summers. The river depends on the aquifer, and dry stretches like we’ve seen are likely to continue if we don’t commit to conservation at home,” Short told the source outlet, as first reported by the Coeur d’Alene Press.
What Comes Next
Avista and regional agencies are encouraging residents and businesses throughout Coeur d’Alene, Post Falls, Hayden, and surrounding Kootenai County communities to reduce water consumption through the end of summer. Conservation measures—shorter showers, landscape irrigation limits, and reduced outdoor water use—can help stretch available supplies and reduce pressure on the dam’s release schedule.
The utility will continue monitoring lake levels and may adjust release volumes if conditions improve or worsen. Residents concerned about water availability or seeking conservation tips can contact Avista directly or reach out to local environmental quality offices in Idaho and Washington.