Comprehensive Adaptation and Implementation Plan Now Open for Public Comment

Comprehensive Adaptation and Implementation Plan Now Open for Public Comment

EUREKA - Caltrans District 1 is inviting public comment on the Comprehensive Adaptation and Implementation Plan (CAIP), a long-term plan to help shape the future of U.S. 101 between Eureka and Arcata in Humboldt County.

The CAIP outlines climate change adaptation strategies for the six-mile Eureka-Arcata Corridor, the region's most heavily traveled highway. Due to its proximity to Humboldt Bay, the corridor is particularly vulnerable to sea level rise and other hazards like coastal erosion, flooding and saltwater intrusion.

District 1 Climate Change Adaptation Branch Supervisor Lorna McFarlane said the CAIP is not a series of planned projects but instead establishes a baseline understanding of current conditions, while providing a roadmap to improve the corridor's resilience over the coming decades.

"The Eureka-Arcata Corridor is vital to the public safety, mobility and economic vitality of our region, and our goal is to keep it functioning now and into the future," McFarlane said. "The plan has to be flexible so we can develop projects that support the environment while helping people stay connected."

Adaptation strategies included in the CAIP vary based on the roadway segment but generally prioritize phased, nature-based solutions and ongoing monitoring to address changing conditions over time. The plan will be updated as new data, projections and funding opportunities become available.

"We've worked closely with state and local partners to develop this document, and we want it to reflect the experiences of all roadway users," McFarlane said. "Public input will help inform our approach to strengthening the resilience of this critical infrastructure."

The CAIP and supporting documents are available at NorthCoastClimateAction.org/Eureka-Arcata-County.

Submit comments to [email protected] by 11:59 p.m. on Tuesday, June 30, 2026.

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