- Coordinates:
- N 38.756547° W 78.251991° (estimate)
- Location:
- Elevation:
- Unknown
- Type:
- Reference Mark Disk
- Setting:
- Square Concrete Monument
- Year Established:
- 1959
- Established By:
- USGS
- Status:
- Not Found
- Condition:
- Unknown (Not Found) as of September 29, 2006