San Bruno Creek Detention Basin Flap Gate Installation DDO (EA 4X110)

The California Department of Transportation Caltrans District 4 is seeking to implement the San Bruno Creek Detention Basin Flap Gate Installation project, identified as EA 4X110. Located on SR-380 at post mile 6.22 in San Mateo County, the project aims to mitigate flooding on 7th Avenue caused by tidal backflow during King Tide events. The scope of work includes removing debris from the outfall and detention basin and installing a flap gate at the 24-inch pipe outlet to prevent creek water from flowing back into the basin. Temporary traffic control will be implemented throughout the construction process to ensure public safety. The project is classified as a forecast with a posted date of August 8, 2025, and is categorized as exempt under the California Environmental Quality Act CEQA pursuant to 14 CCR 15301 Class 1(c) for existing facilities. Juliane Smith, a Senior Environmental Scientist with Caltrans District 4, serves as the primary point of contact. While the project is situated in San Bruno, California, the provided documentation does not specify a contract value, formal period of performance, or specific evaluation factors for award. All work is expected to follow standardized Caltrans practices for existing facility maintenance.