Culvert 221 takes Pigmans Run underneath of the C&O Canal at mile 169.17. It’s in excellent condition and is located at the downstream end of the Pigmans Ferry hiker/biker overnight campground. Seeing many of the culverts that run underneath of the canal requires a difficult scramble down the bank, but this one literally has a mowed path leading to the downstream opening. Due to dry conditions in the area, the stream was running a bit low, but there were still many minnows that seemed to be thriving in a small pool below the culvert.
The Big Run Culvert (#215) is a brick-lined 16′ span. The stream drains the eastern slope of Green Ridge State Forest, and the dry bed looks like it can potentially contain a significant amount of water. This culvert was built in 1850 and has held up pretty well, with the exception of the missing masonry work that once fronted the structure