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Details for Benchmark: TQ0563

N 48° 58.816 W 120° 29.375 (NAD 83)

Altitude: 6640

Coordinates may not be exact. Altitude is SCALED and location is ADJUSTED. (more info)

Location:
In OKANOGAN county, WA View Original Datasheet
Designation:
BUNKER HILL
Marker Type:
survey disk
Setting:
in rock outcrop
Stability:
Most reliable and expected to hold position/elevation well.

Reference Points

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Documented History (by the NGS)

01/01/1935 by IBC (MONUMENTED)
DESCRIBED BY INTERNATIONAL BOUNDARY COMMISSION 1935 (JH) ABOUT 1-1/2 MILES SOUTH AND A LITTLE WEST OF INTERNATIONAL BOUNDARY MONUMENT 88, ON THE SUMMIT OF THE ROCK DOME ON THE NORTHWESTERNMOST END OF BUNKER HILL (GRAY MOUNTAIN). THE STATION IS ABOUT ONE - HALF MILE NORTHWEST OF THE US FOREST SERVICE BUNKER HILL LOOKOUT STATION. STATION MARK--A 3 - INCH BRONZE - DISK STATION MARK BEARING THE WORDS ---INTERNATIONAL BOUNDARY COMMISSION---SET IN A DRILL HOLE IN A ROCK ABOUT 2-1/2 BY 4 FEET IN SURFACE DIMENSIONS.

Control Text

  • The horizontal coordinates were established by classical geodetic methods and adjusted by the National Geodetic Survey in December 1991.
  • 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.

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