Post by abelardbaltimore is just part of a pattern...
Bridges across wide estuaries are not easy to design and build.
However, the reports are that the bridge in question was up to required
standards for the time it was built (1970s).
Seeing the plans for it, built out on several sections, it reminds me of
the Tappan Zee Bridge over the Hudson (north of the NYC/NJ border). I
don't expect that part of the river gets much ocean-going traffic, though.
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[SFW]