From the record
“Pipe Spring National Monument is a United States National Monument located in the U.S. state of Arizona, rich with American Indian, early explorer, and Mormon pioneer history. Administered by the National Park Service, Pipe Spring was listed on the National Register of Historic Places on October 15, 1966, and the boundaries of the Pipe Spring National Monument Historic District were expanded in October 2000.”
Wikipedia article Pipe Spring National Monument, CC BY-SA 4.0.
One of 64 National Register listings published here for Mohave County · listed in 2000 · category: District · built in 1923.
Sources: the Wikipedia article · the case file at the National Archives · the National Register database, National Park Service

