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In summer 2017, contractor crews working for the Washington State Department of Transportation, will begin work on the embankment alongside State Route 105, between mileposts 19.57 and 20.58, in Pacific County.
Last repaired in late 2015, the embankment along this stretch of highway is in need or repair.
High tides and several harsh winter storm events have brought debris and water onto the roadway, causing damage and eroding sections of the shoreline and rock wall.
To protect the roadway and prevent further erosion of the embankment, crews will replace damaged sections of shoreline by adding a revetment.
Revetments are sloping structures made of rocks, sand and other natural materials, which are placed on banks or cliffs in such a way as to absorb the energy from incoming water. They are a low-cost solution for coastal erosion, and work especially well during periods of heavy seasonal rains.
Crews will also be adding a debris berm to channel debris and water away from the roadway during concurrent high tide and storm events.
Why is WSDOT working on erosion protection on SR 105, in the North Cove vicinity?
The purpose of this project is to protect the structural integrity of the SR 105 embankment as well as provide a safer roadway for drivers by preventing debris and water from washing up onto the road.
The End Result
Once completed, this project will provide a stable roadway embankment and reduce or eliminate the potential for debris to wash up on to SR 105.
Erosion protection between mileposts 19.57 and 20.58 on SR 105 is essential and intended to reduce the potential for erosion-related closures at this location.
During construction, drivers should anticipate daytime, single-lane closures, with flaggers, on both directions of SR 105, with delays of up to 20 minutes, through the work zone.
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Colin Newell
WSDOT Project Engineer
360-740-8600
swChehalis@wsdot.wa.gov
Celeste Dimichina
WSDOT Communications
360-905-2057
dimichc@wsdot.wa.gov