26 Nov 2024

Army Corps of Engineers Halts Green Peter Drawdown Ahead of Schedule

The U.S. Army Corps of Engineers (USACE), Portland District, halted the court-ordered drawdown of Green Peter Reservoir, November 22, after receiving requests from three cities downstream on the South Santiam River.

26 Sep 2024

Army Corps of Engineers hosts public info sessions focused on Lookout Point and Green Peter reservoir drawdowns

The U.S. Army Corps of Engineers (USACE) invites the public to three online information sessions to learn about Willamette Valley dams and reservoirs operating under court-ordered interim injunction measures.

10 Oct 2023

Deep reservoir drawdown at Green Peter Dam causes ‘barotrauma,’ death for thousands of kokanee salmon

The Oregon Department of Fish and Wildlife determined that the fish died from barotrauma, a condition caused by a rapid pressure reduction as fish pass from deep below the surface on one side of the dam to the other side near the surface level. Among divers, this decompression effect is known as “the bends.”

30 Sep 2020

Green Peter Dam less risky after extensive studies, rehab and assessment

After years of extensive studies, a risk assessment and recent rehabilitation of spillway gates, officials re-classify Green Peter Dam, near Sweet Home, Ore., as a Low Risk dam. Recent rehabilitation of the spillway tainter gates for trunnion friction and overall reliability have improved the risk characterization. These efforts along with a detailed review of the dam’s hazards, performance and consequences, helped decrease risks from the last assessment, which rated Green Peter as a High Risk dam.