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Details for Benchmark: LX2499

N 41° 30.000 W 073° 02.883 (NAD 83)

Altitude: 208.12

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

Location:
In NEW HAVEN county, CT View Original Datasheet
Designation:
209
Marker Type:
survey disk
Setting:
footings/foundation walls of small/medium structures
Stability:
May hold, but of type commonly subject to surface motion.

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Easy to find - hard to photograph!
Can be seen from sidewalk, but church is private property.

[Photos:]
photoLX2499

Couldn't get to close due to fence. Looks to be in good condition.

[Photos:]
photobenchmark LX2499
photobenchmark LX2499 close as I can get

No problem fiding this one either. My daughter enjoyed following the GPS on this one since you get to park in a lot. This was the 3rd in less than an hour.

Documented History (by the NGS)

01/01/1922 by USGS (MONUMENTED)
01/01/1985 by NGS (GOOD)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1985 IN UNION CITY. IN UNION CITY, SET VERTICALLY NEAR THE NORTH CORNER OF THE ST. MARYS CHURCH, ALONG NORTH MAIN STREET, 5.76 METERS (18.9 FT) SOUTHEAST OF THE NORTH CORNER OF THE CHURCH. THE MARK IS 1.3 M ABOVE GROUND.
05/04/1991 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1991 (JAC) RECOVERED IN GOOD CONDITION.
10/18/1997 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1997 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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