A monument in the front lawn of the Clarion County Courthouse along Main Street (U.S. Route 322) in Clarion, Pennsylvania, United States. The plaque (PD-US-no notice) reads as follows: ONE OF THE ORIGINAL MILESTONES WHICH MARKED THE OLD SUSQUEHANNA AND WATERFORD TURNPIKE NOW KNOWN AS STATE HIGHWAY NO. 322 CLARION COUNTY CHAPTER DAUGHTERS OF THE AMERICAN REVOLUTION The dates 1918 and 1937 appear on the plaque's bottom left and bottom right, respectively.