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Details for Benchmark: LX3279

N 41° 39.617 W 072° 31.067 (NAD 83)

Altitude: 430.02

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

Location:
In HARTFORD county, CT View Original Datasheet
Designation:
A 2566
Marker Type:
survey disk
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 CTDT (MONUMENTED)
01/01/1986 by NGS (GOOD)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1986 6.2 KM (3.85 MI) NW FROM MARLBOROUGH. 6.2 KM (3.85 MI) NORTHWEST ALONG STATE HIGHWAY 2 FROM THE JUNCTION WITH STATE HIGHWAY 66 IN MARLBOROUGH TO THE MARK ON THE RIGHT. IT IS 9.14 METERS (30.0 FT) NORTH OF THE CENTERLINE OF THE HIGHWAY AND 19.45 METERS (63.8 FT) NORTHWEST OF THE NORTHWEST CORNER OF A CATCH BASIN. THE MARK IS 0.48 METERS N FROM A WITNESS POST THE MARK IS 0.18 M ABOVE HIGHWAY.

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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