Operating for nearly 60 years, the ranch is now part of Organ Pipe Cactus National Monument.

The main ranch house was moved from Growler Mine to Bates Well in 1942, re-used in traditional frontier and Gray family practice.

Probably originating as a miners' cabin, the northern portion was presumably added after its relocation at Bates Well.

[2] The Bates Well property represents a very complete and intact example of the frontier ranching pattern in Arizona typical of the Sonoran Desert during the first third of the twentieth century.

The Gray family controlled essentially all ranching operations in the Organ Pipe National Monument area, including Aguajita Spring, Alamo Canyon Ranch, Bonita Well Line Camp, Bull Pasture, Cement Tank, Dos Lomitas Ranch, Dowling Ranch, Gachado Line Camp, Hocker Well, Pozo Nuevo Line Camp, Pozo Salado or Salt Well, Red Tanks Well, Wild Horse Tank and Williams Spring.