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Details for Benchmark: HC0242

N 37° 08.383 W 090° 42.400 (NAD 83)

Altitude: 479.85

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

Location:
In WAYNE county, MO View Original Datasheet
Designation:
RV 173
Marker Type:
rivet
Setting:
set into the top of a round concrete monument
Stability:
May hold, but of type commonly subject to surface motion.

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Documented History (by the NGS)

Unknown by MPRR (MONUMENTED)
01/01/1935 by NGS (GOOD)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1935 1.4 MI S FROM PIEDMONT. 1.4 MILES SOUTH ALONG THE MISSOURI PACIFIC RAILROAD FROM THE STATION AT PIEDMONT, WAYNE COUNTY, AT POLE 128/03, ON THE WEST SIDE OF THE TRACK, AT SIGNAL 1279, AND IN THE TOP OF THE NORTHEAST CORNER OF THE CONCRETE BASE. A STANDARD MONEL-METAL RIVET.

Control Text

  • The horizontal coordinates were scaled from a topographic map and have an estimated accuracy of +/- 6 seconds.
  • The orthometric height was determined by differential leveling and adjusted by the National Geodetic Survey in June 1991.
  • The geoid height was determined by GEOID99.
  • The dynamic height is computed by dividing the NAVD 88 geopotential number by the normal gravity value computed on the Geodetic Reference System of 1980 (GRS 80) ellipsoid at 45 degrees latitude (g = 980.6199 gals.).
  • The modeled gravity was interpolated from observed gravity values.

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