United States Department of Transportation
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US Highway 101 Coastal Hazard Vulnerability and Risk Assessment for Mitigation Prioritization
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2024-02-01
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[PDF-51.34 MB]
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Edition:Final Report
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Abstract:US 101 is a vital economic and emergency lifeline that connects coastal communities and provides access to numerous coastal destinations for Oregonians and tourists. Many sections of this highway are highly susceptible to coastal hazards such as erosion, landsliding, wave action, storm surge, flooding, and rising sea levels. In general, US 101 on the open coast is more impacted by wave-driven erosion hazards and landslides while US 101 in the estuaries is more vulnerable to impacts from storm surge, flooding, and rising sea levels. Structural mitigation of these susceptible areas is challenging due to the extensive Goal 16 and 18 regulatory exceptions processes, which are currently being revisited in the context of maintaining and protecting public infrastructure. To proactively position ODOT to effectively manage risk and support Goal 18 updates, this report describes the development of a coastal highway hazard prioritization matrix that includes vulnerability, risk assessment, mitigation options, and management strategies for planning and project development.
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