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probably worth mention that during the period when the bridge in question was fabricated and assembled, metallurgy was no where near as refined as it is today, Cor Ten didn't even exist, and engineering was significantly less sophisticated  such that bridges under construction often collapsed under their own weight (didn't the Niagra river bridge do exactly that during the same time period (roughly)?) For a significant portion of the 19th century, a structural engineer's stamp of approval could be bought outright, if a deep pocketed customer wanted to save on construction cost. Gee, interesting parallel to the issue at hand, isn't there?  Profit motive over riding the importance of doing things the right way
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