While the nearby Hoy Bridge is the most well known structure along the Heart of Iowa Nature Trail, this structure is equally as significant.
Crossing Rock Creek in Cambridge many feet above the water, this simple closed-spandrel arch was built in 1913. While many other arches sport the closed-spandrel design, this is one of the largest.
The previous bridge at this location was likely a wooden trestle. This design was built during a double tracking project.
Photo of construction from Railway Review: Volume 54 (digitalized by Google)
While appearing frail, the bridge actually remains in rather good condition with some minor spalling.
The author has ranked the bridge as being moderately significant due to the unique large span and the limited amounts of large concrete arches in the area.
The photo above is an overview. The bridge can be accessed from a nearby park.