Eureka Slough Bridges Project
Project Description
Caltrans is planning to replace the northbound and southbound Eureka Slough Bridges located on U.S. Highway 101 at the northern end of the City of Eureka. The project would address seismic deficiencies and improve the function and geometrics of both bridges. The preferred alternative would replace the two existing bridges with two new, mirrored structures. Each bridge would have two traffic lanes, standard inside and outside shoulders, and a separated bicycle and pedestrian path on the outside edge.
Timeline
Construction is estimated to begin in 2029.
Documents
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- Draft Environmental Impact Report/Environmental Assessment, Draft Section 4(f) de Minimis and Draft Programmatic Section 4(f) Evaluation - June 2025 (PDF)
- Draft Environmental Impact Report/Environmental Assessment - Appendices (PDF)
- Notice of Preparation (External Site)
Contact Information
Project Manager
Jeff Pimentel
(707) 834-9529
Environmental Coordinator
Felicia Zimmerman
(707) 815-5994
Public Information (Media Inquiries)
Myles Cochrane
(707) 498-4272
Last reviewed: June 2025
View of southbound bridge looking south
View of northbound bridge looking east
Aerial view of Eureka Slough Bridges looking northwest
Aerial view of Eureka Slough Bridges looking west
Additional Information
Virtual Public Meeting
Wednesday, July 23
6 to 7 p.m.
Caltrans is planning to replace the northbound and southbound Eureka Slough Bridges located on U.S. Highway 101 at the northern end of the City of Eureka. The project would address seismic deficiencies and improve the function and geometrics of both bridges. The preferred alternative would replace the two existing bridges with two new, mirrored structures. Each bridge would have two traffic lanes, standard inside and outside shoulders, and a separated bicycle and pedestrian path on the outside edge.
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