Snake River Basin

January 5, 2023

Reclamations January Operations Update

March 2023

Subject:  2023 Upper Snake River and Reservoir Operations Update

Purpose: The purpose of these updates is to provide information regarding Reclamation's operations and basin conditions as the season progresses. The information is provisional and subject to change.

Highlights

**American Falls and Minidoka Dam releases are expected to increase for water deliveries

**American Falls Dam: The reservoir is 74% full, and approximately 300 cfs is being released from the dam. Releases are expected to increase to approximately 1,250 cfs on Monday and to continue ramping up as we move into April.

**Minidoka Dam: Lake Walcott is 78% full, and approximately 425 cfs is being released from the dam. Releases are expected to remain near current levels next week and to begin ramping up for water deliveries above Milner Dam the week of April 3rd.

9/23/2022: Updated Ramp-down Schedule, Jackson Lake

9/20/2022: Subject:  2022 Upper Snake River and Reservoir Operations Update 

Purpose: The purpose of these updates is to provide information regarding Reclamation's operations and basin conditions as the season progresses. The operations outlined in this update are based on the best data available at the time and are subject to change as new information becomes available. For additional information and resources, please visit our website at  https://www.usbr.gov/pn/hydromet/uppersnake/. 

October 2022

*Decreasing releases from Jackson Lake Dam through October 3 

*Jackson Lake Dam: Through October 3rd, releases from Jackson Lake Dam will be gradually reduced to winter flow levels. The primary ramp-down from current release levels is scheduled to occur September 26-October 3 and will be comprised of small incremental changes each day until the winter flow of approximately 280 cfs is achieved. For more information, please see the contact information and the end of this update.  

Total System Update: The Upper Snake reservoir system is 17% full, which is approximately 41% of average and 2,387 acre-feet greater than last year on this date. The table below summarizes storage distribution across the basin.

9/20/2022: Jackson Lake outflow reduction: 200cfs at 10 am 

9/15/2022: Jackson Lake outflow reduction: 250cfs at 10 am