North End Project

Restoring habitat, improving road safety, and adapting to sea level rise in Bolinas Lagoon.

Project Objectives

Since the early 19th century, land use changes have altered the historical shoreline and watershed of Bolinas Lagoon and increased sediment delivery, resulting in a loss of tidal prism and changes in native habitat. At the North End, hydrologic and ecological disconnection of natural processes and a hardscape perimeter constrain the ability of the tidal brackish marsh and associated habitats to shift up slope as the sea level rises. Traffic safety is also a concern at the North End, as are intersection configurations and roadway flooding resulting from winter storm events and undersized culverts in the project area.

The North End Project intends to:

  • Address roadway safety.
  • Enhance sea level rise resilience.
  • Reconnect the watershed hydrology to restore the floodplain.
  • Enhance natural ecology.

Bolinas Lagoon contains over 1,100 acres of marsh, mudflats, and subtidal and intertidal lagoon habitat that supports a variety of special status plant and animal species. Bolinas Lagoon's ecological significance and complexity require careful planning to ensure the soundness of restoration activities. The Marin Open Space District has primary responsibility for managing the lagoon's resources, but the management and restoration of the lagoon is shared with other agencies that have jurisdiction over the lagoon and its watershed, including: