You know what all these other new bridges that were "built so much faster" didn't have to include in their construction time?

Demolition and salvaging efforts
Site surveys
Design, planning, and cost estimation
Modification of an already existing transportation system

But sure, go off and complain that 10 years is too long because it took 4-6 years from start to finish to build [insert bridge name here] because that's how long it took to physically build after ground breaking.