Regarding the location of the O&W / RW&O Bridge:
It was locacted just to the west of the piers by Potter Street near the site of the old coal shed and crossed over the NYC&HR RR coming down to the west of the U&BR/RW&O Roundhouse the alignment of which is probably 200 feet or so east of the east edge of the State Street entrance ramp for northbound Routes 12 / 8. The southbound exit ramp off Routes 12 / 8 has a pier that pretty much obliterates where the DL&W / EL yard office was located.