A single rail track Bascule Lift span bridge, 72 metres main span. This is based on the dual track bridge built by the American Bridge Company, and is unusual in its operation of the counterweight. The bridge was an attempt to patent something different without infringing existing patents.
It is a modified version of the Strauss Heel Trunnion type. One example existed on the Wabash (now N&W) outside Detroit. The bridge is in the up position until a train comes along, and is suitable for a river crossing. It dates from about 1940. It has been updated for TS2012 to add height adjustment.
You will find it as Bascule Lift Bridge 2 in the USA listing.
The bridge is a mocrossing object and the height is adjusted by raising the ground beneath the centre of the span. Track will connect to the bridge, but you need to use very short lengths of track to connect other bridge splines to it - use invisible track. The bridge approaches for the Tenbridge lift bridge are a match for this structure.