Goat Island Driveway Bridge

I think the shorter span is a Pratt with counters and not a Lattice.

Historicaerials confirms that.

As I understand it, this is not Sellars Mill Road. It is actually a private drive way.

Could someone tell me the age of this bridge and if it was used and during what years?

Thank you

Steve

Thanks for getting these photos, it is nice to get a better look at this bridge. I didn't realize it had that weird newer girder/floorbeam span. Each span is a different age!

As for the double-Warren truss configuration, I have seen bridges like this listed as both Pratts and Double-Warrens. I really don't know what the "correct" classification is. My thinking with the vertical members has been that a standard Warren truss may or may not have verticals, so why shouldn't a double-intersection warren. But I could see someone making the argument that the bridge is a Pratt with counters on every panel, but usually counters are only present in the center panel(s). With pin-connected truss bridges, counters are easy to ID because they are smaller than diagonals, but on riveted truss bridges like this one the counters are often the same size as the diagonals.

Thanks for adding this bridge, Nathan. I will post my pictures of it tonight. I'd be curious to know why the smaller span is a Double-Intersection Warren instead of a four-panel Pratt. I was led to believe it was the latter because of the vertical members.