• Olympic: Three Parks in One

    Olympic

    National Park Washington

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  • Madison Falls Trail Closed for Repairs Beginning July 7

    The one-tenth mile Madison Falls Trail and trailhead parking lot located in Elwha Valley will close to public entry beginning on Monday, July 7 while crews make improvements and repairs.

  • Hurricane Ridge Road Closed to Vehicles Sunday 8/3 (6:00a - noon)

    Due to the "Ride the Hurricane" bicycle event, the road to Hurricane Ridge will be closed above the Heart o' the Hills entrance station from 6:00a to noon on Sunday August 3rd.

Removal of the Glines Canyon Dam

Looking upstream at Glines Canyon dam

A view of Glines Canyon dam from downstream

Scott Church

Dam Removal Strategy:

The removal of the Glines Canyon dam will proceed through a series of steps.

  • First, water will be diverted through the penstock to lower Lake Mills Reservoir up to 80 feet. This will allow for work to occur at Elwha dam with some level of flood protection provided by the Lake Mills drawdown.
  • Once that preliminary work is accomplished at Elwha dam, removal of the upper portion of Glines Canyon dam can occur. At this point, water is flowing over the newly lowered dam crest. The dam will then be notched on alternating sides to create temporary spillways that can be used to further drain the reservoirs.
  • Layers of the dam can then be removed as the reservoir is drained through each new notch. This will be done on alternating sides of the dam until the sediments from the upstream delta have eroded downstream and are resting against the dam.
  • At this point, the remaining portion of the dam will be blasted and the river channel restored.

 
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This webpage was made possible in part by a grant from Washington’s National Park Fund.

Did You Know?

closeup of cow elk face

Olympic National Park protects the largest unmanaged herd of Roosevelt elk in the world. Olympic was almost named "Elk National Park" and was established in part to protect these stately animals.