Lock 38 (Shepherdstown River Lock) The Shepherdstown River Lock is one of only three river locks on the C&O Canal. Built from gray limestone and meant to draw traffic from the Virginia side of the Potomac River, the lock was used by Boteler’s Mill shipping and receiving cement and coal materials via canal boat. This was shot at mile marker 72.5 where you can see the remains of this river lock. I added a luminating effect (color juxtaposed on black and white)for my artistic narrative.