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Details for Benchmark: KU1581

N 40° 48.183 W 073° 38.783 (NAD 83)

Altitude: 36.41

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

Location:
In NASSAU county, NY View Original Datasheet
Designation:
37
Marker Type:
survey disk
Setting:
light structures
Stability:
Mark of questionable or unknown stability.

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Found it while looking for the geocache Horse Through.

Spotted this one clear as day while doing the adjacent Horse Trough cache

Found this one while I was looking for GC6M76E - The Horse Trough. Nice and easy benchmark to find! Usually they're pretty tough!

Found as described.

[Photos:]
photo37
photoSetting

Spotted while caching in the area with fyrefly_faerie

Found while caching

[Photos:]
photo

Discovered while logging the geocachers, "The Horse Trough"

[Photos:]
photoKU1581

Found while looking for a geocache (The Horse Trough - GC6M76E).
Beautiful spot for a benchmark.

[Photos:]
photoBenchmark near The Horse Trough
photoBenchmark KU1581

Found with Susan while geocaching

You can't miss this as you search for the cache. The disk is very damaged and hard to read.

[Photos:]
photoDisk KU1581
photoDisk KU1581
photoKU1581 Setting

#24 Found this one, in good condition, on the Horse Trough.

found this next to the horse trough cache!

[Photos:]
photo

Found this one today while geocaching. Geocache is pretty much at the SAME location.

[Photos:]
photoKU1581
The "trough" benchmark

Found it while retrieving a geo!

[Photos:]
photodisk and geocache
2 for 1

Found in good condition as described. A wonderful old benchmark disk that's in great shape.

[Photos:]
photo37 Disk
photo37 Setting
N 40° 48.198 W 073° 38.792

Easily found by description. Hand-held GPS coordinates: N40 48 11.9 W 073 38 47.5.

[Photos:]
photoKU1581 Roslyn Nassau NY Close Up
photoKU1581 Roslyn Nassau NY View North
Toward intersection of Skillman St and Bryant Ave

Documented History (by the NGS)

Unknown by USGS (MONUMENTED)
01/01/1932 by NGS (GOOD)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1932 AT ROSLYN. AT ROSLYN, NASSAU COUNTY, ON STATE HIGHWAY 25 A, IN THE TRIANGLE FORMED BY THE JUNCTION OF BRYANT AVENUE AND SKILLMAN STREET, AT THE PUBLIC FOUNTAIN, IN THE TOP OF THE WEST SIDE OF THE SOUTH FRONT OF THE UPPER BASIN (USED AS A FLOWER BOX IN 1935), AND 2 FEET ABOVE THE GROUND.
01/01/1935 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1935 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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