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Details for Benchmark: HC0240

N 37° 09.183 W 090° 41.900 (NAD 83)

Altitude: 496.66

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

Location:
In WAYNE county, MO View Original Datasheet
Designation:
RV 172
Marker Type:
rivet
Setting:
light structures
Stability:
Mark of questionable or unknown stability.

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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 AT PIEDMONT. AT PIEDMONT, WAYNE COUNTY, ON THE MISSOURI PACIFIC RAILROAD, OPPOSITE MILEPOST 127, AT A CULVERT, AND IN THE CENTER OF THE TOP OF THE EAST CONCRETE HEADWALL. 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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