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Details for Benchmark: NC0023

N 42° 58.817 W 078° 11.783 (NAD 83)

Altitude: 898.14

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

Location:
In GENESEE county, NY View Original Datasheet
Designation:
N 84
Marker Type:
bench mark disk
Setting:
light structures
Stability:
Mark of questionable or unknown stability.

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Documented History (by the NGS)

01/01/1935 by CGS (MONUMENTED)
DESCRIBED BY COAST AND GEODETIC SURVEY 1935 1.1 MI S FROM BATAVIA. 1.1 MILES SOUTH OF BATAVIA, NY ALONG NYCRR (ATTICA BRANCH) IN LEHIGH VALLEY R.R. BRIDGE OVER ERIE R.R. AND NYCRR IN TOP OF BOTTOM STEP OF SOUTHEAST WINGWALL 70 FEET SOUTH OF CENTER LINE OF NYCRR TRACKS 24 FEET EAST OF CENTER LINE OF ERIE RR TRACK 4 FEET ABOVE TOP OF RAIL.
01/01/1971 by KONSKI (GOOD)
RECOVERY NOTE BY KONSKI ENGINEERS 1971 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.

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