Washington Dam Gets Rock Filter Fix and Temporary Dip
Published Date: 5/29/2025
Notice
Summary
PacifiCorp wants to fix the Yale Hydroelectric Project dam by adding a rock filter, drain berm, and extra riprap, which means lowering the reservoir for two weeks. This affects people in Clark and Cowlitz counties, Washington, and aims to keep the dam safe without harming the environment. You can check out the full report online and send your thoughts by June 23, 2025.
Analyzed Economic Effects
3 provisions identified: 3 benefits, 0 costs, 0 mixed.
Dam Safety Upgrades Proposed
PacifiCorp proposes to install a rock filter and a drain berm on the downstream side of the Yale saddle dam, add a new toe ditch to route seepage, and place additional riprap on the upstream side as part of a license amendment for the Yale Hydroelectric Project (P-2071). These changes are presented as measures to address dam safety at the Yale saddle dam on the Lewis River in Clark and Cowlitz counties, Washington.
Two-Week Reservoir Drawdown
Placing the additional upstream riprap will require a two-week-long drawdown (lowering) of the Yale reservoir. The project and the drawdown are located on the Lewis River in Clark and Cowlitz counties, Washington.
EA Available; Public Comments Due
The Federal Energy Regulatory Commission made the Environmental Assessment (EA) for the Yale saddle dam modifications available online and is accepting public comments through June 23, 2025. You can view the EA in FERC's eLibrary (docket P-2071), file comments electronically via eFiling or eComment, or submit paper comments by mail; the Commission's Office of Public Participation can assist.
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Key Dates
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