4 replies to this topic

[Kelly]

Just before the Golden Gate was being built, across the bay the Carquinez Strait bridge had been finished in 1927. To accommodate more traffic a twin was built in 1960. The 1927 bridge is now being replaced; see this link and others on his page. Notice that even with higher mathematics and computers the engineers are so concerned with wind load they have built models for wind tunnel testing.
This also is first bridge in US with a aerodynamic deck!
http://www.ketchum.o...uinezwind.shtml

This page gives the history and new design – nice page with side views.
http://www.ketchum.org/carquinez.html

Construction photos from Dick McCabe's web page.
http://www.ironmc.com/bridgepics.htm

Ryan B

[KZ]

THe new bridge for the Carquinez strait is already complete and open. Now the issue is about the 1927 bridge; to keep it or not. They say it will cost around 10 million to take down, or they could pay about 20 million to retrofit it so that in the future it can take some of the load off the two bridges in service right now. It would be hard to retrofit due to the design, but it is a possibility. RIght now northbound traffic is to go on the 1927 bridge so that the 60 one can be resurfaced and fixed up.

Also, a new suspension bridge is being built in the bay bridge system, the bridge from Treasure Island to the Maze (away from san francisco). The bridge should be done in 10 or so years.

[CAski]

Why is it that so much money seems to be poured into San Francisco relative to the number of people who live there? In truth, San Diego has a larger population than San Francisco, and yet it has none of the projects San Francisco receives. We have but one bridge (the Coronado Bridge) and our trolley system is almost a joke compared to the offerings of San Francisco. I hope that these projects are funded by the city and not by the state.

[floridaskier]

Wait...There are already two truss bridges there: the one from 1927, and from 1960, and they're building the new suspension bridge to replace the 1927 bridge?

[KZ]

Bingo Tyler. Caski, its not just san francisco, its the entire bay area that it serves in transportation throughout the state. The total population of the Peninsula alone is crazy at probably 3 or so million. On the south bay there are towns lining it from bottom to top. As far as public transportation, MUNI is good, but bart i dunno, just expensive to run.