The Caldecott Blog: News, photos & updates on the Caldecott Tunnel Fourth Bore Construction Project
Current Caldecott Tunnel Progress:
Congratulations to Karen H. of San Francisco! She correctly answered what was significant about the Caldecott Tunnel “breakthrough” – completion of topheading excavation by construction crews – and won $10 to Peet’s.
That marks the end of our Caldecott Tunnel Trivia Contest. Thanks to all for participating! Click here to see a full list of questions, answers, and winners.
Photo credit: Karl Nielsen
Congratulations to Julie D. of Walnut Creek! She correctly answered how many vehicles travel through the Caldecott Tunnel every day – 160,000 – and won $10 to Peet’s.
The Fourth Bore Project recently celebrated a major milestone with the tunnel “breakthrough”. What does this significant milestone represent for the project?
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.
Congratulations to Thomas S., who answered Caldecott Trivia Question #3 correctly and won $10 to Peet’s Coffee & Tea!
TRAFFIC ADVISORY: 
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
Congratulations to Stephanie V., who answered Caldecott Trivia Question #2 correctly and won $10 to Peet’s Coffee & Tea!
If you entered but didn’t win, Question #3 is now out. Happy Internet sleuthing! Click here to view the newest Caldecott Tunnel Trivia Question.
It’s Caldecott Fourth Bore Trivia Time!
The Fourth Bore project is breaking new ground every day. Keep up by testing your Caldecott knowledge and you might learn something new. And use your Internet sleuthing skills, for Peet’s sake!
The Nitty Gritty Details
- New trivia questions will be posted bi-weekly
- One lucky winner will receive a $10 Peet’s Coffee gift card compliments of 511 Contra Costa (Winners will be randomly selected from all correct respondents)
- Answers can be found on the project website at www.caldecott-tunnel.org
Another question…
The Caldecott Fourth Bore Project is composed of four construction contracts. The project to build the Fourth Bore tunnel is by far the largest but several other contracts are included that improve traffic flow in the area. These include:
- Kay Street Project
- Route 24/Highway 13 Interchange Project
Q. What is the 4th contract?
- A. Broadway Tunnel Project
- B. Landscaping Project
- C. Tunnel Road Project
- D. Caldecott Tunnel Third Bore
Last week’s winner
Last week, Roxanne R. answered our trivia question correctly and was randomly chosen to win $10 to Peet’s Coffee & Tea. Congratulations, Roxanne!
Last week’s question and answer to Trivia Quiz #1 was:
The topheading from both the east and the west is being excavated now, and that work will be followed by the bench, or bottom portion.
Q: Why is the top section of the tunnel being excavated first?
A: By excavating the top section of the tunnel first the miners maintain better control of the surrounding rock, which allows more efficient tunneling.
The latest graphic and numbers are in for the Caldecott Tunnel Fourth Bore!
Eastern portal:
- 2,426 feet on the east top heading
- 552 feet on the west top heading
- 197 feet on the west bench
It’s Caldecott Fourth Bore Trivia Time!
The Fourth Bore project is breaking new ground every day. Keep up by testing your Caldecott knowledge and you might learn something new. And use your Internet sleuthing skills, for Peet’s sake!
The Nitty Gritty Details:
- New trivia questions will be posted bi-weekly
- One lucky winner will receive a $10 Peet’s Coffee gift card compliments of 511 Contra Costa (Winners will be randomly selected from all correct respondents)
- Answers can be found on the project website at www.caldecott-tunnel.org
- Please submit answers by Thursday, October 20th, 2011
This week’s question…
The topheading from both the east and the west is being excavated now, and that work will be followed by the bench, or bottom portion.
Q: Why is the top section of the tunnel being excavated first?
Thanks for entering! We’re now onto Question #2.
-
Follow Us
-
Popular Tags
511cc AC Transit air quality BAAQMD BART Bay Area bay bridge bicycle bicycling bike bikes bike to work day biking caldecott fourth bore caldecott tunnel caldecott tunnel construction california caltrans carpool carpooling CHP Clipper commuting construction contra costa Contra Costa County county connection driving electric vehicles headlines incentives maps martinez MTC Pittsburg Pleasant Hill promotions safety spare the air transit transportation Tri Delta Transit walking Walnut Creek WestCAT -
Recent Comments
- Closing gaps in the Iron Horse Trail: I bike in VT (Champlain Valley region). What a delightful trail system you have...
- How Do You Spend Your Commute?: I spend my commute listening to tunes on my ipod touch.
- How Do You Spend Your Commute?: I read!!! and nap :)
- Long Distance Cycling With Kids: And don't forget about the free family cycling workshops and kids bike rodeos...
- How biking regularly changed one man’s life: Great story, thanks for sharing it! I also started out by biking a...
-
Tweets
- Are you an experienced cyclist and want a challenge? BOB ride offers the finest cycling roads thru the East Bay hills http://t.co/rMlJArhD
- Today's the last day to register for the Night and Day Challenge - a foot, bike, or dualthon through San Francisco http://t.co/sL77yilq
- Meet Contra Costa County's 2012 Bike Commuters of the Year! http://t.co/XrdFpkG0
- How is BART going to double its biking riders? See their plan, tell them what you think http://t.co/CLbqwTpC
- Thanks to everyone who participated in the Caldecott Fourth Bore Medallion Competition! Updates on competition results: http://t.co/1ky7yMic
- Follow @511cc
Warning: /var/www/vhosts/511contracosta.org/httpdocs/wp-content/cache/f25610eb97c853dec210a825dcc93c83.spc is not writeable in /var/www/vhosts/511contracosta.org/httpdocs/wp-content/plugins/simplepie-core/simplepie.inc on line 1769