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Details for Benchmark: KV1337

N 40° 43.650 W 074° 47.483 (NAD 83)

Altitude: 764.96

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

Location:
In HUNTERDON county, NJ View Original Datasheet
Designation:
Z 29
Marker Type:
bench mark 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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Found by description, and holograph's coordinates.

[Photos:]
photoKV1337 Tewksbury Hunterdon NJ Close Up
photoKV1337 Tewksbury Hunterdon NJ View North
N 40° 43.638 W 074° 47.488

Behind the telephone pole that is still numbered TT-345 as in the 1942 description. See photo.

[Photos:]
photoZ 29 Hunterdon Co. NJ (KV1337)
photoKV1337 facing NW

Documented History (by the NGS)

01/01/1942 by CGS (MONUMENTED)
DESCRIBED BY COAST AND GEODETIC SURVEY 1942 2.8 MI S FROM CALIFON. 2.8 MILES EAST ALONG A MACADAM ROAD FROM THE CENTRAL RAILROAD OF NEW JERSEY STATION AT CALIFON, HUNTERDON COUNTY, 6 FEET NORTH OF POLE TT-345, 58.7 FEET SOUTHEAST OF THE SOUTHEAST CORNER OF A 2-STORY WHITE HOUSE, 21.5 FEET EAST OF THE CENTERLINE OF A DRIVEWAY, 27.2 FEET NORTH OF THE CENTERLINE OF THE ROAD, 2 FEET FROM A WHITE WOODEN WITNESS POST PAINTED USBM, AND ABOUT 1 FOOT HIGHER THAN THE ROAD.

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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