04-4W420 Bridge Health Project

The 04-4W420 Bridge Health Project, managed by Caltrans District 4 in the Bay Area/Oakland region, focuses on the rehabilitation of three bridge structures on Route I-680 in Contra Costa County. The project targets the Walnut Creek N680-N242 Connector (No. 28-0040G), the Grayson Creek Bridge (No. 28-0180K), and the Grayson Creek Bridge (No. 28-0180). The primary objective is to preserve structural integrity and prevent bridge failure by addressing cracks, deterioration, and spills identified through Structure Maintenance and Investigation. The scope of work includes deck patching, overlays, joint seal replacements, and traffic safety updates, as well as the installation or replacement of roadway markings and specific bridge identification painting on the Grayson Creek Bridge. The project is classified as a forecast under NAICS code 237310 and has been determined to be a Categorical Exclusion under NEPA and a Class 1(D) statutory exemption under CEQA, as the work is limited to the top of the bridge decks and does not impact sensitive wildlife or mature trees. It is also compliant with air quality standards for reconstructing bridges without adding travel lanes. Key administrative personnel include Project Manager Rebecca Perng and Lead Agency Contact Claudia Soto. The project is identified by EA 04-4W420 and Federal-Aid Project Number 0422000148.