Rock Creek (Adams Co.) (2) COORDINATES: 39.872499, -77.202926 COUNTY: Adams MANUFACTURER: Unknown. No maker of stream markers has been determined. STATUS: Restored and reinstalled by PennDot as part of the bridge replacement project. April 2013 photo by J. Graham 2014 photo by J. Graham Business U.S. Route 15 North of of Gettysburg Typical double-sided stream marker on top mount post