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Why is WSDOT rebuilding the US 101 Elwha River Bridge?
Built in 1926, the 3-span, 388-foot concrete arch bridge has served the community for more than 90 years. Over the last several years, the Elwha River has dramatically changed its course and flow, leading to significant erosion around the bridge foundations. As a result, WSDOT estimates the riverbed around the bridge’s piers has lowered 14 feet.
View historical photos (pdf 731 kb)
The lowered riverbed revealed the piers’ seals, prompting WSDOT to do borings to verify the depth of the foundations. The borings, done in October 2016, revealed the foundations are on gravel, not bedrock. This finding was in contrast to what the original 1926 engineering plans showed. As a result, WSDOT immediately installed almost 5,000 tons of riprap (large boulders) around both piers to help prevent further erosion. Additional bridge monitoring using tilt meters, crack meters, water flow meters, surveys and visual observations are also underway.
WSDOT is moving forward through a series of complex environmental reviews and approvals. WSDOT remains committed in continuing to work with local and regulatory partners in this project including Federal Highway Administration, Department of Interior, Olympic National Park, Department of Archaeology and Historic Preservation, Lower Elwha Klallam Tribe, Department of Ecology, Department of Fish and Wildlife, Corps of Engineers and area jurisdictions. Moving forward requires concurrence between all parties involved through a Memorandum of Agreement.
The End Result
The new Elwha River Bridge will be 40 feet wide and accommodate two 12-foot lanes with two-8 foot shoulders (the current bridge is 28 feet wide). The wider bridge will create a more comfortable crossing for travelers and provide adequate shoulder room for bicyclists and pedestrians. Additionally, the new alignment with US 101/Olympic Hot Springs Road will have a more gentle curvature, with a higher design speed (40 mph) at the east end of the bridge.
The US 101 Elwha River Bridge is vital to the well-being of the communities on the Olympic Peninsula. Replacing the bridge will ensure that the US 101 route continues to be a reliable transportation facility for decades to come.
Additional project benefits include:
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JoAnn Schueler
WSDOT Project Development
360-357-2798
Dan McKernan
WSDOT Project Engineer
360-565-0623
Tina Werner
WSDOT Media Relations
360-704-3270
Toll Free Information Hotline
Information about bridge status is available by calling 1-888-633-4005. Please note this number does not accept messages.