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Details for Benchmark: TN1041

N 48° 59.897 W 114° 34.359 (NAD 83)

Altitude: 7602

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

Location:
In FLATHEAD county, MT View Original Datasheet
Designation:
HEFTY
Marker Type:
drill hole
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)

01/01/1903 by IBC (MONUMENTED)
DESCRIBED BY INTERNATIONAL BOUNDARY COMMISSION 1903 (ECB) ON HEFTY MOUNTAIN THE HIGHEST POINT OF A RIDGE ABOUT 4-1/2 MILES WEST OF THE FLATHEAD RIVER WHERE IT CROSSES THE INTERNATIONAL BOUNDARY, ABOUT ONE - FOURTH MILE SOUTH OF MONUMENT 259. THE STATION MAY BE REACHED WITH THE HORSES FROM A TRAIL WHICH CROSSES TO THE RIDGE A FEW METERS NORTH OF THE BOUNDARY NEAR MONUMENT 259. STATION MARK--A DRILL HOLE WITH A TRIANGLE AROUND IT AND THE LETTERS ---U.S.---, CUT IN A SMOOTH FLAT STONE 12 BY 12 BY 5 INCHES, PLACED WITH ITS SURFACE FLUSH WITH THE GROUND. IN 1933 A COPPER RIVET WAS CEMENTED INTO THE DRILL HOLE.
01/01/1933 by IBC (GOOD)
RECOVERY NOTE BY INTERNATIONAL BOUNDARY COMMISSION 1933 STATION SEARCHED FOR AND RECOVERED.

Control Text

  • The horizontal coordinates were established by classical geodetic methods and adjusted by the National Geodetic Survey in July 1992.
  • 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.