Looking to identify some ruins found in the woods near the remains of a mid 18th century stone barn in Monocacy, Union Township, Pennsylvania. Near the barn remains, is a small stream or drinking spring bed. One portion of this is lined with walls made of cut stones with tongue and groove wooden boards covering the stream bed. The water is actually flowing over top of the wood. The wood appears very old and looks to be perfectly cut to fit the stream bed. The wood is not rotten or soft. It is solid and hard. I have never seen anything like this before. Could this have been the floor of a building or spring house that was above the spring at one time? It's very odd. Has anyone here ever seen anything like this before?