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Details for Benchmark: JZ0856

N 39° 20.067 W 084° 30.583 (NAD 83)

Altitude: 644.13

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

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

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Saw no evidence of a disk, a newer concrete pour has been placed pn top of the top step of the wingwalls of the overpass. Not sure if this is newer than the 2002 date of the previous log.......would have liked to seen a photo of that recovery.

[Photos:]
photowhat I found at the top step of wingwall

Yippie, found with youngest crew member & 3 scout buddies as described
ELECTRIC SHAVERS

[last edit: 9/15/2003 4:11:23 AM PST]

Documented History (by the NGS)

01/01/1947 by CGS (MONUMENTED)
DESCRIBED BY COAST AND GEODETIC SURVEY 1947 5 MI SE FROM HAMILTON. 5.0 MILES SOUTHEAST ALONG THE BALTIMORE AND OHIO RAILROAD FROM THE STATION AT HAMILTON, ABOUT 5.4 MILES NORTHWEST OF THE STATION AT GLENDALE, AT OVERPASS NO. 204 OVER PORT UNION ROAD, SET IN THE TOP OF THE EAST END OF THE TOP STEP OF THE EAST WING WALL OF THE OVERPASS, 6.1 FEET NORTHEAST OF THE NORTHEAST RAIL AND ABOUT 1.5 FEET BELOW THE TRACK.
01/01/1977 by DOD (GOOD)
RECOVERY NOTE BY US DEPARTMENT OF DEFENSE 1977 RECOVERED IN GOOD CONDITION.

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.