Just Posted: New Engineering Circular on Sea Level Rise, Storm Surge; New USDOT Climate Adaptation Plan

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Hydraulic Engineering Circular 25, Vol. 2: Highways in the Coastal Environment: Assessing Extreme Events (October 31, 2014)


The circular provides technical guidance and methods for assessing the vulnerability of coastal transportation facilities to extreme events and climate change, focusing on sea level rise, storm surge, and waves.  Approaches are based upon using risk-based, data driven concepts manifested by three different levels of effort ranging from use of available data to original numerical modeling.  The manual also contains a method for computing relative sea level rise based on local tidal gages and likely impacts of climate change.  The FHWA anticipates that there will be multiple uses for this guidance including risk and vulnerability assessments, coastal floodplain management, planning activities, and design procedure development.  HEC-25 v2 aligns with current and anticipated FHWA policy and programmatic guidance in areas of extreme events, extreme weather events, climate change, adaptation, and resilience.  HEC-25 v2 is available in the FHWA Policy and Guidance Center and is posted on the FHWA Office of Bridges and Structures website.


U.S. Department of Transportation Climate Adaptation Plan (2014) The plan describes how DOT will integrate considerations of climate change adaptation and resiliency into DOT policies, programs, and operations.


For more information on FHWA climate adaptation activities, please see: