Black Gap Bridge

Black Gap Bridge - Credit: Wikimedia Commons

The Black Gap Bridge on Old Safford Rd., 7.8 miles southwest of Clifton, Arizona, was built in 1920–21. It has also been known as Pumroy Canyon Bridge. It is one of few convict labor-built bridges surviving in the state. It was listed on the U.S. National Register of Historic Places in 1988. Read more on Wikipedia

type: NRHP
date from: 1920

Source: en.wikipedia.org