INCOMING STORM TRIGGERS SYNCHRONIZED FLOW – TRRP Sends Request to Raise Flows at Lewiston Dam

[Abel, Kiana]

For Release: Dec. 21, 2025

Contact: Kiana Abel, Public Affairs Specialist, ja...@usbr.gov, 530-623-1804

INCOMING STORM TRIGGERS SYNCHRONIZED FLOW - TRRP Sends Request to Raise Flows at Lewiston Dam

The Trinity River Restoration Program has requested a change to river flows on the Trinity River below Lewiston Dam for ecological purposes. The predicted incoming storm meets the requirements to trigger a synchronized storm pulse flow.

The request to Central Valley Operations is to increase river flows mid-morning on Wednesday, Dec. 24 to peak at 6500 cfs during the overnight hours between Dec. 25 and Dec. 26. 

It is important to note that this request is subject to approval by Central Valley Operations. To be notified of the final approval/change order along with an hourly schedule of releases via email please sign up for Trinity Releases Email Group or follow us on our Facebook page.

Recreating along the Trinity River is not advised until the storm passes and flows recede. If you live along the river (or any tributaries), please make sure to move items from the river's edge.

Ways to stay informed:

• Lewiston Dam change order notifications email group sign up: http://groups.google.com/group/trinity-releases/boxsubscribe
• Follow river levels via CNRFC: CNRFC-TRNC1
• Follow the storm via National Weather Service, click here: NWS Radar

Kiana Abel

Public Affairs Specialist | Trinity River Restoration Program | U.S. Bureau of Reclamation 

1313 S. Main St., Weaverville, CA 96093-1300 | 530-623-1804 (desk) | 530-739-9761 (cell) | ja...@usbr.gov