Welcome to the Bay Bridge East Span Biological Mitigation website. The goal of this website is to provide timely information about Caltrans' biological mitigation and monitoring efforts related to the construction of the new San Francisco-Oakland Bay Bridge East Span to the regulatory agencies and members of the public.

Over the course of construction, updated biological monitoring information will be posted on this website and all monitoring and compliance reports will be available in the form of viewable or downloadable files.

For more information about the construction on the Bay Bridge, please visit the Caltrans Bay Bridge Seismic Safety Project website .