River Lock and attached bridges at Red Jacket Pill

The River Lock and attached bridges at Red Jacket Pill is a 18th-century structure featuring a lock chamber made of coursed rubble stone, topped with large dressed coping stones. At the narrower northeast end, there are rebates for the lock gates, which are partially intact. The walls curve outward beyond the gates and end with a later addition of a copper-slag wall on the south side. The southwest end of the lock chamber mirrors this design, with rebates and partial remains of the lock gates. Beyond these gates, there is a two-span rubble-stone bridge featuring a segmental arch ring above the entrance to the lock and a second arch on the south side over the canal, which was built in the 1780s. A canal-side wall from this period survives in part. The lock walls also curve outward on the southwest side, similar to the northeast. A later rubble stone revetment is present on the north side. The bridge retains its parapet, with copper-slag coping that is only partially intact on the north side. On the southeast side, the parapet, also with copper-slag coping, curves outward and uphill. The deck of the bridge is missing and is now covered with vegetation.