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Details for Benchmark: LX0372

N 41° 16.633 W 072° 57.200 (NAD 83)

Altitude: 35.44

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

Location:
In NEW HAVEN county, CT View Original Datasheet
Designation:
O 3
Marker Type:
bench mark disk
Setting:
massive structures
Stability:
Probably hold position/elevation well.

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Had to hang onto the fence to get this one.

[Photos:]
photobenchmark LX0372

Documented History (by the NGS)

01/01/1922 by CGS (MONUMENTED)
01/01/1965 by NGS (GOOD)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1965 AT WEST HAVEN. AT WEST HAVEN ALONG THE NEW YORK, NEW HAVEN AND HARTFORD RAILROAD, ABOUT 50 FEET WEST OF ELECTRIC TOWER NO. 1031, SET IN THE TOP OF THE WEST END OF THE SOUTHEAST STONE WING WALL OF THE OVERPASS OVER CAMPBELL AVENUE, 9 FEET SOUTH OF THE SOUTH RAIL OF THE SOUTH ONE OF FOUR TRACKS, 3.1 FEET EAST OF THE WEST END OF THE WING WALL AND ABOUT LEVEL WITH THE TRACK.
01/01/1988 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1988 (JAC) 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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