SR 680 Retaining Walls at Sunol Boulevard and Koopman Road

Interstate 680 Northbound Ramp Metering, Caltrans #04-4G1134 (Subcontractor to Bay Cities Paving & Grading, Inc.)

This project provides the installation of ramp metering systems for four on-ramps/connectors along I-680 in Alameda County from 0.3 miles south of Scott Creek Road Undercrossing to 0.3 mile north of Alcosta Boulevard Overcrossing from Post Miles (PM) M0.0 to PM R21.9. The structures consisted of two retaining walls, barrier slabs, gore paving and vegetation control.