News for those who live, work and play in the Santiam Canyon

Detroit Dam area closure extended

Reporter for The Canyon Weekly

By James Day

The roadway across Detroit Dam and the parking lot and restroom atop the dam will remain closed through the end of March because of a continuing spillway gate rehabilitation project.

The third phase of a three-winter project to rework the dam’s six spillway gates originally was scheduled to conclude Feb. 28, but the U.S. Army Corps of Engineers says it needs some additional time to complete work on the final spillway gate, said Christie Johnson, lead natural resource specialist with the Corps’ Cottage Grove office.

This winter’s shutdown on top of the dam started Oct. 15 and now will continue through March 31. Johnson said that the 2020 wildfires slowed the spillway gate work during the 2020-21 winter season, and that the additional construction time is needed to compensate for that delay in the schedule.

The dam road and parking lot are closed because they are being used by construction crews as a staging area.

The six spillway gates, which have been reworked on a schedule of two per winter the past three years, are going through a routine rehabilitation that also will reduce the risk of failure during an earthquake.

The rehabilitation work includes structural strengthening of the gates, full replacement of the gate hoist equipment and replacement of the trunnion bearing systems. 

Other miscellaneous work includes replacing the switch gear, limit switches, lighting and gate control systems.

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