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Details for Benchmark: KV1291

N 40° 46.267 W 074° 49.400 (NAD 83)

Altitude: 940.8

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

Location:
In MORRIS county, NJ View Original Datasheet
Designation:
N 25
Marker Type:
bench mark disk
Setting:
in a boulder
Stability:
May hold, but of type commonly subject to surface motion.

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Found it.® That dolphin is obstinant.

N 40° 46.209 W 074° 49.396

So, we pull off the the side of Zellers Road near the pole at the coordinates listed. And we start searching 50 feet east of the centerline of the road. There are some nasty roses and greenbriar here! Didnt find anything, so we moved north to the next pole. Here's where the greenbriar tore a hole through my blue jeans! Nothing. Moved south to the next pole. Hmm... There's a rock in the front yard of the house here! This house is only about ten years old. Harry has never been noted for being stealthy... He sneaks into the yard, having espied the turquoise color of a benchmark disk. A few quick pictures. No one notices.
Found, 368 feet off. No wonder no one has ever found this one!

[Photos:]
photoKV1291 Washington Morris NJ Close Up
photoKV1291 Washington Morris NJ View East
photoKV1291 With GPS and Coordinates

Documented History (by the NGS)

01/01/1942 by CGS (MONUMENTED)
DESCRIBED BY COAST AND GEODETIC SURVEY 1942 0.8 MI N FROM MIDDLE VALLEY. 0.8 MILE NORTH ALONG A DIRT ROAD FROM THE CENTRAL RAILROAD OF NEW JERSEY CROSSING AT MIDDLE VALLEY, MORRIS COUNTY, 82.7 FEET NORTHEAST ACROSS THE ROAD FROM A POLE, 90.6 FEET NORTH OF A 28-INCH OAK TREE, 52.8 FEET EAST OF THE CENTERLINE OF THE ROAD, 38.2 FEET EAST OF A RAIL FENCE, IN THE TOP OF A BOULDER, AND ABOUT 3 FEET HIGHER THAN THE GROUND.

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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