Dumbarton Rail Corridor

Dumbarton Map Feb 7 2020 PNG

The Dumbarton Rail project aims to: Increase capacity and travel options with a new east-west mass transit connection between southern portions of the San Francisco Peninsula and the San Francisco East Bay; increase connections among travel modes; and bring transit closer to key origins and destinations throughout the Project region. Read the latest Project Fact Sheet.

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In August 2018, the San Mateo County Transit District (District) began partnering with Cross Bay Transit Partners (CBTP), a joint venture between Facebook and Plenary Group, to explore options to enhance mobility options along the Dumbarton rail corridor. The District and CBTP will explore the feasibility of potentially reopening the corridor for passenger service and facilitating mixed-use transit-oriented development at key transit connections.

This effort follows the completion of the Dumbarton Corridor Transportation Study, and will consider the study's recommendations for the rail corridor. The Dumbarton Rail Corridor is a critical connector between residential neighborhoods in the East Bay and job centers on the San Francisco Peninsula. Together, the District and CBTP are exploring new, environmentally appropriate alternatives for a high quality, high-capacity public rail system. A strategic, community supported Dumbarton rail project could bring much-needed commute alternatives along with job and housing opportunities to the Bay Area.

Process / Timeline: 

  • Spring - Winter 2019: Kick-off Meetings with the Community and Stakeholders
  • Summer 2020: Environmental Scoping
  • Summer 2020: Alternatives for Evaluation
  • Spring 2021: Identification of Preferred Alternative
  • Summer 2021: Public Draft of Environmental Document
  • Spring 2022: Final Environmental Document
  • Summer 2022: Permitting and Approvals

Environmental Review Process:

As the Environmental Quality Act (CEQA) lead agency, the District is responsible for the environmental review process and the certification of an Environmental Impact Report (EIR).

The District will prepare an EIR according to state requirements outlined in the CEQA and their Board of Supervisors will consider certification of the EIR. The project is also subject to the National Environmental Policy Act (NEPA). The Federal Transit Administration (FTA) will be the lead federal agency for the project.

The environmental documents as well as other project resources will be linked in the folders below as they become available. 


Contact Info: