Ghirardelli Associates

I-80 / Central Avenue Operational Improvements Phase 1

Ghirardelli Associates was selected by CCTA to provide construction management services for this project which improves the traffic operations at the I-80/Central Avenue interchange and along Central Avenue between Rydin Road and San Pablo Avenue. The project will be completed in two phases. Phase 1 redirects left turns from westbound (WB) Central Avenue onto I-80 WB to the adjacent I-580 eastbound onramp at Rydin Road during weekend peak hours; and installs traffic signals at the I-580 ramps. The project also included installing 17 new ADA curb ramps along Central Avenue between Highways 80 and 580.

Ghirardelli Associates staff inspected the signalization of two 4-way stop intersection, the installation of four new variable message signs and overhead sign structure, the removal and replacement of 17 new ADA compliant curb ramps and the removal and installation of 100-feet of new barrier rail over the Union Pacific Railroad (UPRR) and Highway 580. We monitored compliance with the contract plans and specifications, as well as recorded and reported all construction activities and maintained reports in a project file. We maintained construction diaries that included documentation of the work progress, materials tested, and any other pertinent information in a daily diary for permanent record of events.
Photographs of project progress were taken on a regular basis and kept for permanent records to verify quality for acceptance.

The project also processed a million-dollar change order to remove and replace 3,000 tons of asphalt concrete along Central Avenue between Pierce Street and the I-580 overcrossing.
This project included many different inspection disciplines including, structures, civil, and electrical and required coordination with multiple different entities including, Contra Costa Transportation Authority, City of Richmond, Caltrans, East Bay Municipal Utility District, AT&T, UPRR, Stege Sanitation, and PG&E. The project staff, especially our field inspector, work very hard to make this project a success for both Ghirardelli Associates and our client.

Client: Contra Costa Transportation Authority (CCTA)
Location: Richmond, CA

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