B&M spots gondola car on IBA bridge in Portsmouth, NH 1987B&M spots gondola car on IBA bridge in Portsmouth, NH 1987 to create temporary dead load on the lift span of the bridge during highway deck reconstruction above. Removing the concrete deck without this weight would have caused the bridge to rise uncontrollably as the counterweights would have outweighed the span.
Photographed by Stephen R. Piper, May, 1987.
Added to the photo archive by Stephen Piper, January 26, 2002.
Railroad: Boston & Maine.
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