Agricultural water users across Idaho’s Snake River basin will avoid curtailment this irrigation season following an agreement between the state and Idaho Power, the Department of Water Resources announced Thursday.
The arrangement resolves a potential crisis that threatened thousands of farms and water rights holders. In June, the department had notified more than 4,000 trust water users that curtailment could become necessary as water levels approached historic lows tied to the year’s drought conditions.
The 1984 Settlement Framework
The underlying dispute stems from a 1984 agreement that settled competing claims between Idaho Power and state agricultural interests over Snake River water. The Swan Falls Settlement Agreement established a minimum stream flow requirement of 3,900 cubic feet per second at Swan Falls Dam, balancing the utility’s hydropower generation needs against farmers’ irrigation demands.
For four decades, stream flows had remained above that threshold. This year marked the first time water levels threatened to drop below the mandate, creating a potential obligation to reduce deliveries to irrigation rights holders who depend on the river.
Governor’s Request and Idaho Power’s Response
In a June 26 letter to Department of Water Resources Chairman Jeff Raybould, Governor Brad Little asked the department to secure alternative storage water to maintain minimum flows without imposing curtailment on agricultural users. Idaho Power subsequently agreed to the approach, writing to the governor that they would not demand enforcement of the settlement’s curtailment provisions for 2026.
Little indicated support for the solution, saying “Under their proposal the Snake River will not run dry of water for trust water right holders this season, but I want to be equally clear that this is a bridge, not a fix.” He added, “I support Idaho Power’s proposed approach, and I am grateful for their cooperative outreach.”
The governor’s framing acknowledged that while this year’s agreement averts immediate harm to irrigation, it does not address underlying water supply challenges that may persist in drought years ahead.
What Comes Next
The temporary reprieve provides breathing room for water managers and policymakers, but long-term solutions remain elusive. Idaho faces ongoing pressure to balance agricultural water demands against energy production, environmental flows, and competing uses across the Snake River system. Future years with similar drought conditions may require more permanent modifications to the 1984 framework or new conservation approaches.
For now, farmers in Nez Perce County and throughout the Snake River valley can plan their 2026 irrigation seasons without the disruption of forced cutbacks.