From the record
“The Dead Indian Canyon Bridge, near Desert View in Coconino County, Arizona, is a Warren truss bridge built in 1933 as part of developing public highway approach from the east to the south rim of the Grand Canyon. It was listed on the National Register of Historic Places in 1988.”
Wikipedia article Dead Indian Canyon Bridge, CC BY-SA 4.0.
One of 140 National Register listings published here for Coconino County · listed in 1988 · category: Structure · built in 1934, National Park Service rustic.
Sources: the Wikipedia article · the case file at the National Archives · the National Register database, National Park Service