It took a year to build the Empire State Building, and 5 years to build the Hoover Dam yet current estimates for the Francis Scott Key bridge rebuild are near 10 years. Why is this? Have we regressed?
In: Engineering
Francis Scott Key bridge rebuild has some challenges unique to it. First of all, the debris from the previous bridge has to be dealt with. Second, it spans a very busy waterway so dealing with the wreckage and building the new bridge both need to be accomplished with the least disruption to shipping as possible.
Then add in modern safety and building standards and you get a significantly more complex project than the ones you are citing.
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