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  • Public invited to comment on draft study of Detroit Reservoir deep drawdown, potential end to hydropower production

    The U.S. Army Corps of Engineers (USACE) Portland District is seeking public input on a draft study that considers changes to how the agency operates its Willamette Valley dams. This study – referred to as a Supplemental Environmental Impact Statement (SEIS) –builds upon a six-year study completed in April 2025 and addresses new requirements regarding endangered fish and hydropower production that emerged shortly before the six-year study was finalized.

  • Corps of Engineers to explain current reservoir drawdowns at virtual public meeting

    The U.S. Army Corps of Engineers will host a virtual public information session Thursday, Nov. 13, 5:30-6:30 p.m. to discuss plans to lower reservoir levels this fall at Cougar, Green Peter, Lookout Point, and Fall Creek reservoirs. The session will provide an overview of the reservoir drawdowns, the anticipated drawdown schedule, and how this year's operations differ from previous years. USACE experts will be on hand to answer questions and address community concerns.

  • Virtual reality experience shows Willamette Valley environmental progress

    Army engineers and planners continue developing an Environmental Impact Statement (EIS) for the Willamette Valley System (WVS) that will address the continued operations and maintenance of the System in accordance with authorized project purposes; while meeting Endangered Species Act obligations to avoid jeopardizing the continued existence of listed species.

  • Corps developing long-term plans for Cottage Grove and Dorena lakes, wants public input

    The land-use plan (Master Plan or MP) for Cottage Grove and Dorena lakes is out-of-date, and the U.S. Army Corps of Engineers (Corps) is in the process of updating it. Corps staff are seeking input from the public on MP development during four upcoming information sessions.

  • Corps, partners host Long Tom River dam modification info session

    The City of Monroe, Oregon, and the Confederated Tribes of Siletz Indians have entered an agreement with the U.S. Army Corps of Engineers (Corps) to study the feasibility of improving fish passage near the Monroe drop structure on the Long Tom River. Public participation and feedback are important, and the Corps and its partners will seek input during an info session Nov. 3, 4-5 p.m.

  • Poor water year continues - Corps hosts info session

    As warm, dry weather continues, the U.S. Army Corps of Engineers, Portland District is seeing a worsening water year as it strives to refill 13 Willamette Valley reservoirs for the upcoming recreation season.

  • 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.

  • Corps lifts restrictions at campgrounds in Rogue and Willamette valleys

    Campgrounds at Lost Creek, Cottage Grove, Dorena and Lookout Point lakes will open Thursday, June 11.

  • We … want … a shrubbery … or some volunteers to plant shrubberies

    The U.S. Army Corps of Engineers invites volunteers who aren’t afraid of the “Knights who say Ni” or shrubberies (Monty Python reference) to help it celebrate the 25th anniversary of National Public Lands Day, Saturday, Sept. 22.

  • Corps drills into Cottage Grove Dam during geotechnical investigation

    The U.S. Army Corps of Engineers’ Dam Safety team is conducting a geotechnical investigation at Cottage Grove Dam near Eugene, Ore., beginning Thursday, which includes drilling borings in the dam embankment.