Mackinac Trail–Carp River Bridge
The Mackinac Trail–Carp River Bridge is a bridge located on H-63 over the Carp River in St. Ignace Township, Michigan. It is the oldest bridge in Mackinac County, and was listed on the National Register of Historic Places in 1999.
History
In 1913, road improvement began on the Mackinac Trail a state trunkline highway connecting St. Ignace and Sault Ste. Marie. The improvement project included both grading the road surface and upgrading the bridges along the roadway. For one of these bridges, which carried the Mackinac Trail over the Carp River, the Michigan State Highway Department designed a concrete arch bridge in 1919. The department awarded the contract to construct the bridge to A. S. Decker of Flint, Michigan, who completed work on the bridge in 1920.This section of the Mackinac Trail was later incorporated into U.S. Highway 2 increasing the traffic flow across the bridge. In response, in 1929–30, new guardrails were added to the bridge, the deck was widened by, and new approaches of decorative cobblestone were constructed. The section of US 2 was later replaced by Interstate 75, and the Mackinac Trail was redesignated as a county road, later numbered H-63.
In 2009, the bridge was considered for demolition. However, it was decided in 2010 to refurbish the bridge instead. Weakened concrete was replaced, drains installed, and the roadway was widened by another. The Mackinac Trail–Carp River Bridge still carries local traffic.