Caltrain Grade Separation: Potholing, Temporary Train Station Improvements

Work on the San Bruno Grade Separation Project will take place Saturday, July 30 to Friday, Aug. 5.

Day work will take place between the hours of 7 a.m. and 5 p.m. This includes potholing, drainage improvements at the temporary station, construction of retaining walls for the temporary station, and sanitary sewer and utility relocations. Relocation of sanitary sewers and utilities will primarily occur along San Bruno, San Mateo, Huntington, and Angus avenues and may require temporary lane closures. Traffic cones and flaggers will direct motorists and pedestrians around the affected areas.

Night work will take place from 8 p.m. to 4 a.m., outside of peak passenger service hours. This work will include signal system upgrades, excavation, construction of retaining walls for the temporary station, ballast installation, as well as pedestrian and traffic gate relocations on San Bruno and Angus avenues. Digging work will require the use of a backhoe, mini-excavator and jackhammer. At times, noise levels could be as high as 75 decibels. Crews will use generators to power portable light towers. Night work will be done in accordance with Caltrain and city agreements and ordinances.

The $147 million project will elevate the Caltrain tracks above three existing at-grade street crossings at San Bruno, San Mateo and Angus avenues. A new elevated Caltrain station will be constructed between San Bruno and San Mateo avenues, replacing the existing station at Sylvan Avenue.