511 Contra Costa

New limits on commute benefits, service changes for MLK Jr. Day and the state of the environment 40 years ago as documented by American photographers.

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Now that the east and west sides of the Caldecott Tunnel meet, construction crews have started working on installing rails for a gantry system and waterproof membrane. Check out the newest construction photos below.

Above: Crews began installation of the rails for the gantry system and the waterproof membrane in Keep reading >>

On Tuesday, workers saw the light in the Caldecott tunnel. Still a lot more tunneling on the bench but see the progress!

Watch videos of the Caldecott Tunnel breakthrough on the SFGate Blog. Keep reading >>

Caldecott Tunnel workers keep on tunneling! Here’s the latest graphic and digging updates:

• Eastern side topheading: 2,529 feet
• West side topheading: 613 feet
• West side bench: 197 feet

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The latest figures for progress on the Caldecott Tunnel construction are in!

• Topheading on the eastern portal: 2,227 feet
• Topheading on the western portal: 414 feet
• Bench on western portal: 178 feet

As of August 13, the Caldecott Tunnel construction is progressing as follows:

• Topheading eastern portal: 2,080 feet
• Western portal (topheading): 359 feet
• Western portal (bench): 77 feet

Source: http://caldecott-tunnel.org/ Keep reading >>

Below is the schedule of traffic advisories for Oakland from Friday evening to Saturday morning associated with work on the Caldecott Fourth Bore Project.

Eastbound (in Oakland)

Broadway On-Ramp: Closed 8 PM on Friday, August 5 to 8 AM on Saturday, August 6 for the installation of K-Rail.

Vehicles will Keep reading >>

Just in – new numbers and a new graphic for the Caldecott Tunnel construction:

• East side topheading: 1705 feet
• West side topheading: 233.9 feet

With nearly 590 meters tunneled and just over 400 meters left to go, the top heading of the Caldecott Tunnel Fourth Bore is now 60% complete!

Read Keep reading >>

West Portal Sound Wall from inside staging area

Last Thursday, Senator Barbara Boxer visited the Caldecott tunnel, a $420 million project that has nearly half its funds ($197.5 million) coming from the Recovery Act. Boxer stated the Caldecott tunnel project would create between 4,000 and 4,500 new jobs by the time it Keep reading >>

After decades of waiting, commuters can celebrate the groundbreaking of construction on the Caldecott Tunnel Fourth Bore, scheduled for this Friday at 11 am.

The project aims to alleviate well-known traffic congestion along the bottleneck between Orinda and Oakland by creating a fourth bore in the existing Caldecott Tunnel. The Keep reading >>