This is along the C&O Canal, about 6 miles from where I live. It's been there for decades, maybe at least a century. The guard rail is where the edge of a 2 paved lane road is. In person I can't see any mortar. But don't know for sure if any is tucked in back out of sight. What were they thinkin??? Building a wall WITHOUT grid??? And why did they not wait till NCMA came along and offered class and a course???