Transportation Authority of Marin
The Transportation Authority of Marin (TAM) has developed a comprehensive Sea Level Rise Adaptation Planning Study to address the critical challenges posed by rising sea levels and coastal flooding to Marin County’s transportation infrastructure.
This study identified a diverse set of adaptation strategies tailored to the county’s unique landscape, including physical infrastructure enhancements, nature-based strategies, and policy and governance initiatives. This study reflects TAM’s commitment to protecting Marin County’s transportation network while fostering equity and enhancing nature. By leveraging partnerships and innovative solutions, TAM is positioning Marin County to adapt to the challenges of SLR and show what is possible to other coastal communities in California and beyond.
Pathways updated the analysis of coastal flood vulnerability in Marin County, led the vulnerability assessment and identified high-risk areas with a focus on the transportation system. Pathways leveraged results from their 2022 Regional Shallow Groundwater Response to Sea Level Rise study to assess TAM’s vulnerability to groundwater rise – a first in TAM history.
Using best available science, Pathways identified 19 locations of current and future coastal flood vulnerability within TAM’s jurisdiction - known as Focus Areas. The Focus Areas provided information on the flood related hazards for each, the timing of impact on roads, impacts to transit and bicycle routes, and identification of key community and lifeline assets. Pathways developed an evaluation framework to help determine the prioritization of the 19 focus areas and the results of the exposure assessment and evaluation framework are summarized in the final report.