Everything I read says this bridge was built in the late 40s, yet it looks almost exactly like the McCan Mill Road bridge from 1923
( http://www.bridgehunter.com/nj/hunterdon/100T35S/ ) aside from some extra lacing on the diagonals. Similarities in style with the Manners Road bridge from http://www.bridgehunter.com/nj/hunterdon/bh53443/ which is thought to be from the 1920s as well.
And given that the Kuhls Road bridge from 1936 is entirely welded
it's rather difficult to accept that one 13 years younger was made with rivets ... and that "1914 boiler look". And then we come to the extra plates welded on.
But it is the doubled up side plates and their orthogonal "jumper connectors" that make this bridge unique. They look for all the world like some kind of brackets for holding something, but there are just oo many of them and they're too large for that. Did this bridge have a bad case of the wobbles that had to be cured?
So my thought is that this one is quite a bit older than 1949, My guess is 1915, and may have been reworked and strengthened and perhaps even moved to this location in 1949.