Here’s a cool video from PBS.org on volcanos:
The San Francisco-Oakland Bay Bridge is closed this weekend for a major project, part of the seismic upgrade of the bridge. This will make the bridge safer in case of a major earthquake.
In 1989, the Loma Prieta Earthquake damaged a 50-foot section of the upper deck on the Eastern side, making it collapse onto the lower deck. This weekend’s project is part of a major construction project that will eventually replace the Eastern span of the bridge, scheduled for completion in 2013.
We’re watching the construction crews in action on the construction cams. There’s a cool computer simulation of the work that is being done this weekend, and when the job is done, all the video that is being shot will be available in a time-lapse video on http://baybridgeinfo.org.