Mendocino Highways
2025 Summer Road Construction
A series of projects are occurring on State Route 1 along the Mendocino Coast that will improve and repair infrastructure but will impact traffic at multiple locations between Westport and Manchester this summer. From bridge and culvert replacements to paving and other projects, it’s all underway.
While this summer may present challenges for travelers on SR 1, please keep the long-term goal in mind – new bridges and broadband capabilities for the benefit and safety of our coastal communities plus smooth and durable pavement.
Road construction often seems to happen "at the same time" because of a combination of factors including: project planning and permitting processes, emergency projects and the need to minimize traffic disruptions by concentrating construction during specific times of the year when weather is most favorable, leading to a concentrated period of construction activity across the region.
Here’s what’s happening and where to expect delays:
Please plan ahead when traveling along the Mendocino Coast this summer. Visit Caltrans District 1 social media or QuickMap for the latest road conditions. Motorists are reminded to “Be Work Zone Alert” and slow in construction zones for the safety of travelers and work crews.
Current Projects
Search #MendocinoCoast, and follow District 1 on Facebook, X and Instagram for the latest updates.
The purpose of the project is to provide a bridge across the Albion River that meets modern seismic safety standards, provides safe and reliable multimodal access, and minimizes ongoing maintenance costs.
This project will replace the existing two bridges on State Route 20 (SR20) that span the Russian River and Eastside Road in Redwood Valley.
Caltrans proposes to replace the existing Eel River Bridge (Caltrans Bridge #10-0236) on State Route 162.
Caltrans proposes to replace the existing Elk Creek Bridge (Bridge #10-120) located on State Route 1 (post miles 31.35) to improve the function and geometrics of the bridge.
Caltrans, in partnership with the Mendocino Council of Governments, proposes an enhancement project on State Route 1 through downtown Gualala (post miles 0.6 to 1.0). The current design of the downtown area of Gualala has several deficiencies that could increase conflicts between motorized users, cyclists, and pedestrians.
Caltrans proposes to construct improvements on U.S. Highway 101 in downtown Hopland (post miles 10.8 and 11.2) for compliance with the Americans for Disabilities Act. Work would include improving curb ramps, sidewalks, and driveways, reconstructing the roadway, rehabilitating pavement, upgrading drainage systems, signage, and Transportation Management Systems facilities.
The purpose of the project is to bring Jack Peters Creek Bridge up to current design standards by widening the existing structure and upgrading bridge rails.
Caltrans proposes to replace the Salmon Creek Bridge on Route 1. The current bridge, built in 1950, has a concrete deck over steel beams. The bridge is functionally obsolete because it is narrow and does not meet current standards for shoulders and guardrails.
The purpose of the project is to remediate lead-impacted shallow soil in the State Right-of-Way and on the privately-owned parcels adjacent to the Salmon Creek Bridge. The project is needed because historic bridge painting practices resulted in elevated lead concentrations in shallow soils beneath and east of the Salmon Creek Bridge.
