Portsmouth Rd. / Cheboyganing DriveCounty: Saginaw
City/Township: Buena Vista Twp.
Location: Portsmouth Rd. / Cheboyganing Drive
Year Built: 1921 About this Bridge: This is the oldest known surviving example of a standard Michigan State Highway Department concrete camelback bridge of 70 feet. Michigan's Highway Department developed standard designs in the late 1910s as a way of producing inexpensive bridges for the State Trunkline System, and was a national leader in doing so. L.A. Davison & Company was the contractor for this bridge.