Old Garrison. Built in 1796 to replace Fort Franklin. The site at the foot of Tenth Street is now under water. It commanded both French Creek and the Allegheny River. Occupied by U.S. troops until 1799, it was later the first jail of Venango County. 10th & Liberty Sts. (on U.S. 322), Franklin, PA by Pennsylvania Historical and Museum Commission Colour: blue Wikimedia: Flickr: Google Streetview OpenStreetMap