SHACK RM 1 Coordinates: N 31.865361° W 112.755305° Location: Arizona Pima County South of Lukeville Quad Elevation: Unknown Type: Reference Mark Disk Setting: Rock Outcrop Year Established: 1936 Established By: NGS Status: Recovered Condition: Good as of March 27, 2019 View larger map View Google map For more information, see: SHACK NGS Reference Mark Disk SHACK RM 1 Eyelevel view of the disk on the outcrop Looking NW from RM 1 toward the station For more information, see: SHACK
