The Swing Span does look newer. Never noticed that before.
The span was not likely renovated in 1982, as a lift span would have likely been put in instead. So I cannot say when it was renovated. The historic aerial photos of the area are poor quality.
Wikipedia gives the dates of rehabilitation of 1925, 1951 and 1982. I would put my money on the last date though. It is odd, especially for this area, that a bridge built in 1910 wouldn't last until this date.
The approach spans may date to 1910, but the main swing span is clearly new. Anyone know the exact year? John Week's website says work was done many times, most recently in 1982, but I am not sure what date the swing span was replaced.