Details for Benchmark: QH0379
N 45° 15.279 W 070° 50.911 (NAD 83)
Coordinates may not be exact. Altitude is SCALED and location is ADJUSTED. (more info)
- In OXFORD county, ME View Original Datasheet
- MON 447 IBC
- Marker Type:
- NGS Benchmark
- setting not listed - see description
- May hold, but of type commonly subject to surface motion.
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Documented History (by the NGS)
|01/01/1845 by IBC (MONUMENTED)
|DESCRIBED BY INTERNATIONAL BOUNDARY COMMISSION 1845
CAST - IRON POST, 6 FEET LONG, WHICH IS NOW SET IN A CONCRETE BASE 3 FEET SQUARE WITH THE TOP OF THE CAST - IRON POST RISING 3 FEET ABOVE THE SURFACE OF THE BASE.
|01/01/1967 by IBC (GOOD)
|RECOVERY NOTE BY INTERNATIONAL BOUNDARY COMMISSION 1967 (HGD)
STATION RECOVERED IN GOOD CONDITION.
- The horizontal coordinates were established by classical geodetic methods and adjusted by the National Geodetic Survey in March 1998. No horizontal observational check was made to the station.
- The orthometric height was scaled from a topographic map.
- The Laplace correction was computed from DEFLEC99 derived deflections.
- The geoid height was determined by GEOID99.