Caldecott Tunnel Fourth Bore

Southwest County
PROJECT BUDGET $417 Million
PROJECT SPONSOR
CCTA & Caltrans
LOCATION:
Between Contra Costa and Alameda counties along SR 24 north of the existing bores.
STATUS:
Completed
Funding

The Caldecott Tunnel fourth bore was the largest transportation project to receive federal stimulus funding in 2009.

Download Fact Sheet On Friday, November 15, 2013, CCTA and project partners Caltrans, Metropolitan Transportation Commission, and Alameda County Transportation Commission cut the ribbon on the Caldecott Fourth Bore, signifying the successful completion of a monumental engineering feat – and the long-awaited start of smoother traffic flow along a critical corridor for 160,000 motorists each day.

At the time of the groundbreaking on January 22, 2010, the shovel-ready Fourth Bore was the largest transportation project to receive federal Stimulus funding. The Fourth Bore project had been years in the ...more