Ball’s Run, which here joins Catoctin Creek, once powered two Waterford mills a few hundred yards up-stream. But it presented a problem for owners of the mill at the foot of Main Street, who had dug a channel or millrace to carry water from a dam farther upstream on Catoctin Creek and needed to get that water past the Run, which flowed at a lower level. In the early years they probably built a wooden trough or aqueduct to carry the water over Ball’s Run. By the early 1900s, though, they had dammed the Run to bring it up to the level of the millrace. Then, by way of sluice gates, they could divert its water into the race to augment the flow to the mill in dry seasons. The over-flow was known as “The Chute,” and below the dam was a favorite swimming hole until time and repeated floods took their toll. Today only a stone buttress or two and scattered chunks of concrete mark the site of the dam. A short path to the left takes you to the spot.