I know that there are a few lift bridges on the route. One is by CP Ralph over the Elizabeth River. One is by CP Karen over the Rahway River, and another one is by BARB over what I think is the Woodbridge River. Are any of these still operated???
Elizabeth River is weld shut.
The southernmost bridge is the Spring Creek in Sewaren and (likely) weld shut since the CR 611 bridge downstream blocks all navigation.