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Details for Benchmark: JZ0855

N 39° 21.817 W 084° 31.617 (NAD 83)

Altitude: 622.34

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

Location:
In BUTLER county, OH View Original Datasheet
Designation:
V 145
Marker Type:
bench mark disk
Setting:
massive structures
Stability:
Probably hold position/elevation well.

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Documented History (by the NGS)

01/01/1947 by CGS (MONUMENTED)
DESCRIBED BY COAST AND GEODETIC SURVEY 1947 6.1 MI E FROM HAMILTON. 4.3 MILES SOUTHEAST ALONG THE BALTIMORE AND OHIO RAILROAD FROM THE STATION AT HAMILTON, THENCE ABOUT 1.25 MILES NORTH ALONG GILMORE ROAD, THENCE ABOUT 0.55 MILE WEST ALONG BOBMYER ROAD, AT THE HAMILTON AIRPORT, SET VERTICALLY IN THE EAST FACE OF THE CONCRETE WALL AT THE SOUTHEAST CORNER OF THE WEST HANGAR, 2.3 FEET NORTH OF THE SOUTHEAST CORNER, 1.7 FEET SOUTH OF THE SOUTH EDGE OF A HANGAR DOOR, 37 FEET NORTH OF THE CENTER LINE OF BOBMYER ROAD, AND 3 FEET ABOVE THE GROUND.

Control Text

  • This mark is at Hamilton-Fairfield Airport (HAO)
  • 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.