Marin County Parks and Open Space Department

Bolinas Lagoon North End Project


The Conceptual Design Report was presented to the Board of Supervisors on February 27, 2018. The Board directed staff to proceed with recommended design and the environmental review of Phase 1.

The draft Conceptual Design Report for the North End Project was discussed at the Bolinas Lagoon Advisory Council (BLAC) Special Meeting on September 29, 2017. The meeting was held at Audubon Canyon Ranch, Volunteer Canyon, 4800 Highway 1, Stinson Beach, and was open to the public. At this meeting the BLAC provided a recommendation to the Marin County Board of Supervisors.

This draft report presents three design alternatives for the North End Project. The alternatives were selected collaboratively with partner agency stakeholders, the Bolinas Lagoon Advisory Council (BLAC), and members of the Bolinas and Stinson Beach communities.

Part I: Project Overview describes the purpose and need, goals, and stakeholder involvement, and summarizes existing site conditions.

Part II: Alternatives Conceptual Design, Cost, and Timeline describes the three conceptual design components by phase, presents high-level costs by alternative and phase, and provides a conceptual timeline for project design, environmental review, and build.

Part III: Opportunities and Constraints Analysis presents the opportunities and constraints associated with the alternatives, and discusses potential impacts, permitting, and mitigation.

Comments on the report may also be emailed to

Bolinas Lagoon Conference

At the State of the Bolinas Lagoon Conference on March 30, 2017, three conceptual design alternatives for the North End project were proposed and members of the public offered feedback. There will be additional opportunities to comment on this project at upcoming meetings before the Bolinas Lagoon Advisory Council and the Marin County Board of Supervisors. Comments may also be sent to

Project Description

The North End Wetland Enhancement and Sea Level Rise Adaptation Project is the result of a culmination of over 20 years of active participation and contributions from the communities of Bolinas and Stinson Beach, with the Marin County Open Space District, Point Reyes National Seashore, Golden Gate National Recreation Area, and the Greater Farallones National Marine Sanctuary (formerly the Gulf of the Farallones National Marine Sanctuary). Based on a number of assessment documents and recommendations from technical experts, the North End project was prioritized for funding. The project’s objectives are to alleviate chronic flooding of Marin County and State roadways and improve traffic safety, improve the function of Lewis and Wilkins Creek, enhance riparian and wetland habitats, and allow for future expansion of Bolinas Lagoon as sea level rises.

Currently the MCOSD has received funding to undertake Phase I and II of the project. Phase I of the project includes conducting reconnaissance level surveys of the existing biological, cultural, and physical resources within the project area, and identifying the restoration goals for the area bundled into the Site Conditions Report. Phase II includes developing an opportunities and constraints report and three conceptual design plans that address both resource enhancement and transportation issues.