eBART Mow Access Tunnel Undercrossing
East Contra Costa County, CA

eBART Mow Access Tunnel Undercrossing
East Contra Costa County, CA

Our firm is providing the structural design PS&E for a reinforced concrete box structure, traversing underneath the high volume traffic of westbound SR4, east of the future eBART Hillcrest Station; it is needed to provide access to the future Maintenance Facility for eBART trains from the median.

This box structure measures 30 feet wide by 330 feet long by 18.50 feet high (clear dimension) on a 500-foot radius curve. Also included in the PS&E is the approach concrete retaining walls adjacent to the two portals; design heights vary from 4 feet to 34 feet with surcharge loads. The walls with design heights greater than 20 feet are special design, otherwise Caltrans Standard Type 1 Walls are used. Design is according to current Caltrans LRFD method.

This BART facility is a part of the SR4 Widening construction project administered by Caltrans/CCTA.