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Details for Benchmark: LX3089

N 41° 37.550 W 072° 27.750 (NAD 83)

Altitude: 557.28

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

Location:
In HARTFORD county, CT View Original Datasheet
Designation:
L 92
Marker Type:
bench mark disk
Setting:
in rock outcrop
Stability:
Most reliable and expected to hold position/elevation well.

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some nicks & paint?

[Photos:]
photoDSC00431

Found while searching for a geocache

I saw the witness post as I was driving past. On my return trip, I pulled over and I found the disk itself. This is a great little spot, as a nearby rock has been painted up to resemble an orange lizard! The disk is really quite worn, but I could still read L92 on the disk itself.

[Photos:]
photoThe disk itself, L92
photoThe disk with the witness post
photoThe orange lizard who guards the disk area
photoMarking on the road makes for an easy find

Found in good condition

[Photos:]
photoLX3089 2
photoLX3089 1

Documented History (by the NGS)

01/01/1986 by NGS (MONUMENTED)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1986 0.5 KM (0.3 MI) WEST FROM MARLBOROUGH. 0.5 KM (0.3 MI) WEST ALONG STATE HIGHWAY 66 FROM THE POST OFFICE IN MARLBOROUGH TO THE MARK ON THE LEFT, 11.0 METERS (36.1 FT) EAST OF THE CENTERLINE OF THE HIGHWAY, 23.7 METERS (78.0 FT) NORTHEAST OF POWER POLE NO. 226. THE MARK IS 0.36 METERS W FROM A WITNESS POST THE MARK IS 0.76 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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