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Details for Benchmark: KV0552

N 40° 38.050 W 074° 02.183 (NAD 83)

Altitude: 30.07

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

Location:
In KINGS county, NY View Original Datasheet
Designation:
M 342
Marker Type:
bench mark disk
Setting:
massive structures
Stability:
Probably hold position/elevation well.

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Spent a mild winter's day benchmark hunting in Brooklyn, ending up with 26 marks out of 29 attempts.

Found easily and in good condition. The benchmark is next to a railing, next to the service entrance.

[Photos:]
photoM342 Disk
photoM342 Setting

Found intact.

[Photos:]
photo74th and Shore Road.
Set knee high in a great apartment building on Shore Road.
photoJust beyond the light.
Looking west from Shore and 74th Street.

Found as described in good condition.

First to Find!

[Photos:]
photoKV0552 "M 342" setting, Bay Ridge, Brooklyn NY
photoKV0552 "M 342", Bay Ridge, Brooklyn NY

Documented History (by the NGS)

01/01/1952 by CGS (MONUMENTED)
DESCRIBED BY COAST AND GEODETIC SURVEY 1952 AT NEW YORK. IN NEW YORK, IN BOROUGH OF BROOKLYN, AT THE JUNCTION OF SHORE ROAD AND 74TH STREET, SET VERTICALLY IN THE SOUTH FACE AT SOUTHWEST CORNER OF WYNSHORE APARTMENT BUILDING, 1.3 FEET EAST OF SOUTHWEST CORNER OF BUILDING AND ABOUT 3 FEET ABOVE SIDE WALK.

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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