Our Dam Safety program has found that most of our dam’s spillway gates are aging and may not operate properly when water levels are high and placing significant pressure on the gates. This may result in a gate failing to open, or becoming stuck in the open position. Such failures could compromise our ability to manage water releases from that dam.
We assessed the gates in 2010, which resulted in the replacement or repair of critical components and development of a prioritized plan for long-term rehabilitation of the gates. All of Green Peter, Foster, Big Cliff, Lookout Point, Dexter and Fall Creek dams' spillway gates have been strengthened. Rehabilitation of Blue River and Hills Creek dams' gates are in progress and scheduled for completion in Fiscal Year 2018. The need for longer term gate rehabilitation work remains at four dams in the Willamette Valley.
For more information about the Willamette Valley dams’ gates, see:
Willamette Valley spillway gates: Posters
Willamette spillway gates: YouTube video