Mainville (Shenandoah – 22) COORDINATES: 40.978303, -76.375675 COUNTY: Columbia DISTANCE TO NEXT: Shenandoah - 22 EXPLANATION OF NAME: Name Selected To Indicate Most Important Village In Main Township FOUNDED: 1800 MANUFACTURER: ? SHAPE: Standard 1-sided STATUS: Marker is turned 90 degrees on the post to face the intersection. October 2012 photo by Clair Clawser Ca. 2002 photo contributed by Blair Bohr, in memory of Mr. Charles Bohr. August 2018 Google Streetview photo September 2025 photo by Mike Wintermantel PA 339