| Key Facts |
| Bridge Name | Facility Carried / Feature Intersected | Location | Structure Type | Construction Date / Builder or Contractor |
| 23 Mile Road Bridge | 23 Mile Road Over North Branch Clinton River | Rural: Macomb County, Michigan | Concrete Closed Spandrel Deck Arch, Stationary | 1935 By: Unknown |
| Technical Facts |
| Alteration Date | Structure Length | Roadway Width | Main Spans | Approach Spans |
| 1952 | 170 Feet (51.8 Meters) | 23 Feet (7 Meters) | 2 | None |
This bridge from the deck appears to be a 1950s stringer bridge with period railing. However, an inspection of the bridge from beside the river reveals that steel cantilevers were set into a narrow concrete arch bridge to add width to the bridge. Thus, the railings do date to the 1950s, as they were added when a project to widen a 1935s concrete arch took place. After that large project, this bridge has survived with good integrity. Although the bridge has no weight limit, this bridge may eventually end up on a demolition list. 23 Mile Road has been being widened into five lanes as it is a very busy road.
