When California's first Bay Bridge was built in 1936, it required permitting from one government agency -- unlike today when approvals had to be sought from 13 agencies. That's only one of the differences between the new San Francisco-Oakland Bay Bridge and the original spans. Amount and cost of materials, time to build and safety regulations are just some of the changes that have occurred over time, according to this article. "When asked why engineers and builders 80 years ago could work so much faster, a contractor on the bridge half-jokingly described today's construction landscape as the equivalent of asking workers to erect a bridge in record time with their hands tied behind their backs," writes Lisa Vorderbrueggen.

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