April 20, 2001

An Old Bridge Spans Lessons in History and Engineering

By LAWRENCE BIEMILLER

With one hand clutching at a railing and a safety harness cinched around his waist, Jai B. Kim inches along a pair of camber rods on the downstream side of a rusty, wood-floored span known as Henszey's Wrought-Iron Arch Bridge. Mr. Kim, a

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