• Olympic: Three Parks in One

    Olympic

    National Park Washington

There are park alerts in effect.
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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.

  • Spruce Railroad Trail Improvements to Begin August 5

    Spruce Railroad Trail will be closed from the Lyre River TH to approximately 0.25 miles east of Devil’s Punchbowl. Work is expected to be completed by the end of October. The remainder of the trail will be accessible from the Camp David Jr. Road TH. More »

  • Safety Advisory: Mountain Goats

    NPS has received reports of aggressive mountain goats near trails at Hurricane Ridge, Royal Basin, Seven Lakes Basin, Lake of the Angeles, & Grand Pass. Visitors are required to maintain a distance of at least 50 yards from all wildlife. More »

  • Safety Advisory: Rabies

    Rabies has been detected in a single bat in the Lake Crescent area of the park. Rabies exposure is extremely rare, but fatal if untreated. Anyone observing unusual or aggressive behavior among park wildlife should inform a park ranger as soon as possible. More »

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?

belted-kingfisher1

The Belted Kingfisher will hover in place directly over a river, lake, or pond, watching for fish before diving to catch them.