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  • June

    Corps Finds No Significant Environmental Impact Reducing Detroit Dam’s Maximum Elevation Pool

    The Portland District found no significant environmental impacts associated with reducing Detroit Dam’s Reservoir maximum pool elevation by five feet to curb the risk of a large earthquake causing the spillway gates to buckle.
  • March

    Corps considers plan to reduce Detroit Reservoir maximum pool elevation

    Portland District, U.S. Army Corps of Engineers considers a plan to reduce Detroit Reservoir’s maximum pool elevation by five feet beginning this summer to reduce the likelihood of overstressing the spillway gates during a large earthquake, which might impact boat ramp access in some years.
  • October

    Spillway gate rehab closes Detroit Dam road

    A second season of rehabilitation of the Detroit Dam spillway gates begins Nov. 2, which will close the road on top of the dam. The U.S. Army Corps of Engineers anticipates the work window and road closure to last through February 28, 2021.
  • September

    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.
  • February

    Corps to upgrade early warning sensors at Willow Creek Dam

    Starting in mid-February, the U.S. Army Corps of Engineers, Portland District, will install new sensors in the foundation of Willow Creek Dam, which will provide early warning if the dam’s performance changes over time.
  • October

    Corps drills into Foster Dam during geotechnical investigation

    The U.S. Army Corps of Engineers’ Dam Safety team will conduct a geotechnical investigation at Foster Dam near Sweet Home, Oregon. Drilling should begin on October 22 and it will include boring into the dam’s embankment or rock-fill portion of the dam.