Beyond Blue Mountain to the Northern Tier » Northumberland County » Montandon Vicinity » Eastern Pennsylvania » Rishel Covered Bridge Rishel Covered Bridge Details 1830. Covered Bridge Rd., off PA 45, 2 miles east of Montandon Reputed to be the oldest covered bridge in Pennsylvania still in use, the Burr-arch truss bridge has a 110-foot span across Chillisquaque Creek. Writing Credits Author: George E. Thomas