- Coordinates:
- N 31.866049° W 112.771073° (estimate)
- Location:
- Elevation:
- Unknown
- Type:
- Reference Mark Disk
- Setting:
- Unknown Setting
- Year Established:
- 1936
- Established By:
- International Boundary and Water Commission
- Status:
- Not Found
- Condition:
- Unknown (Not Found) as of March 27, 2019
For more information, see: BOUNDARY MON 166 MX US
For more information, see: BOUNDARY MON 166 MX US