511 Contra Costa

Caltrans closed the bicycle lane at the eastbound on-ramp to Fish Ranch Road. Bicycles were allowed on the freeway shoulder between the Fish Ranch Road on-ramp and the Wilder Road off-ramp. However, Caltrans is installing a drainage pipe along the shoulder and must close the bike lane to facilitate the Keep reading >>

Caltrans will close lanes 3 and 4 (two right lanes) of Westbound Rte. 24 and the Third Bore between 10PM and 4AM on Monday and Tuesday nights, September 20-21, 2010. In addition, the Fish Ranch Road on-ramp and off-ramp will be closed between 10PM and 5AM.

Caltrans will close lanes Keep reading >>

The giant roadheader made a small ceremonial cut Aug. 8 for a public event, but it had to back out and wait for crews to use torches and other tools to cut out metal reinforcement embedded into the hill to stabilize the east portal of the tunnel.

The giant roadheader, Keep reading >>

Caltrans will close the connector between westbound Route 24 and Northbound Highway 13 beginning at 5PM on Friday, August 27 until Monday, August 30 at 5AM. Traffic seeking northbound Hwy 13 will be detoured onto the Caldecott Lane off-ramp. Signs will guide motorists to northbound Hwy 13.

Source:

• Caldecott-tunnel.org Keep reading >>

Caltrans contractors plan to start carving out the fouth bore of the Caldecott Tunnel on Monday. The roadheader that is being used for the project is a 130-ton, 54-foot-long and 14-foot-tall excavation device with a rotating cutter mounted on a boom. The roadheader will dig the 3,389-foot-long bore that will Keep reading >>

According to Caldecott-tunnel.org, Caltrans will close the connector between westbound Route 24 and Northbound Highway 13 beginning at 5 PM on Friday- July 30 until Monday-August 2 at 5 AM. Traffic seeking northbound Hwy 13 will be detoured onto the Caldecott Lane off-ramp. Signs will guide motorists to northbound Keep reading >>

The wall shown in the photos below will eventually become the east portal wall. According to Caldecott-tunnel.org, most walls are built from the base upwards.

First, an auger drills large holes, ninety feet deep and several feet apart. Concrete is poured into the circular holes and allowed to harden. Keep reading >>

According to mercurynews.com, fossil hunter Joshua Wyatt recently found the imprint of an avocado tree leaf- about 10 million years old- preserved in smooth rock like leaves flattened between layers of wax paper. The excavation of the fourth bore of the Caldecott Tunnel has opened a door for paleontologists Keep reading >>

According to caldecott-tunnel.org, the left lane and the adjacent lane (#1 & #2) of westbound Route 24 before the Caldecott Tunnel will be closed Wednesday and Thursday nights, July 14-15 from 11:00 PM – 4:00 AM. The middle tunnel bore will also be closed during this time period.

Source: Keep reading >>

According to Caldecott-tunnel.org, the far right lane (#4) of westbound Route 24, before to the Caldecott Tunnel will be closed Tuesday night, July 13. The closure at 7:30 PM, with full closure in place by 8:30 PM. The closure will be until 4:00 AM.

Also, the Fish Ranch Road Keep reading >>