From the record
“The Horse Valley Ranch, also known as Waring Ranch, near Littlefield, Arizona, dates from 1916. A 28.5-acre (11.5 ha) area of the ranch was listed on the National Register of Historic Places in 1984.”
Wikipedia article Horse Valley Ranch, CC BY-SA 4.0.
One of 64 National Register listings published here for Mohave County · listed in 1984 · category: Building.
Sources: the Wikipedia article · the case file at the National Archives · the National Register database, National Park Service