Mare Island Causeway Bridge Update - August 2026

Repair work on the Mare Island Causeway Bridge continues to experience temporary delays due to nearby nesting activity from the California Black Rail, a threatened native species. The birds’ nesting season concludes at the end of this month, and full work operations will resume on September 1.

Below is a detailed update on project tasks and overall progress.

• Painting of the lift towers is now fully complete.
• The lift span is operating on its normal schedule with no time restrictions, as directed by the U.S. Coast Guard.
• Sidewalk installation remains slowed due to the nesting‑season limitations established by the California Department of Fish and Wildlife.
• Installation of light posts and light poles on the south side of the bridge is complete.
• Installation of the bridge logo has been delayed to November/December 2026, dependent on the completion of other work.
• Guardrail post installation and handrail painting on the south side are approximately 70 percent complete.
• Working under the bridge to install and repair/secure bolt connections to the pier abutments remains ongoing.

At this time, the project remains approximately 65 percent complete, and the projected completion date continues to be March 2027.

The City will continue providing updates as work progresses.