The 76-year-old eastern span of the San Francisco Bay Bridge in California will be torn down in sections rather than destroyed with explosives due to environmental restrictions. The demolition will take three years and cost $240 million. A temporary S-curve detour will be the first section to be dismantled, followed by the cantilever truss portion between the bridge's main towers. Then the road decks will go, and finally the foundations. Crews "been surveying ... and doing a lot of paperwork and environmental compliance," said Andrew Gordon, the project's spokesman.