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Details for Benchmark: JU0357

N 39° 19.750 W 074° 35.200 (NAD 83)

Altitude: 19.6

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

Location:
In ATLANTIC county, NJ View Original Datasheet
Designation:
I4
Marker Type:
bench mark disk
Setting:
light structures
Stability:
Mark of questionable or unknown stability.

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Documented History (by the NGS)

01/01/1924 by CGS (MONUMENTED)
01/01/1964 by CGS (GOOD)
DESCRIBED BY COAST AND GEODETIC SURVEY 1964 1.4 MI NE FROM SOMERS POINT. 1.25 MILES NORTHEAST ALONG SHORE ROAD FROM THE CITY HALL AT SOMERS POINT, THENCE ABOUT 0.15 MILE NORTHWEST ALONG OCEAN HEIGHTS AVENUE, AT THE CROSSING OF THE PENNSYLVANIA-READING SEASHORE LINES RAILROAD, 13 FEET NORTHEAST OF THE CENTER LINE OF THE AVENUE, 27.5 FEET SOUTHEAST OF THE SOUTHEAST RAIL, 7 FEET SOUTH OF POWER POLE P29697, ABOUT 0.5 FOOT ABOVE THE GROUND AND SET VERTICALLY IN THE SOUTHWEST FACE OF A 2 1/2-BY-3 1/2 FOOT MASS OF CONCRETE THAT AT ONE TIME WAS A BASE FOR A CROSSING LIGHT SIGNAL. NOTE-- THIS BENCH MARK CAN ALSO BE REACHED BY GOING ABOUT 5.35 MILES SOUTHWEST ALONG U.S. HIGHWAY 9 FROM THE INTERSECTION OF U.S. HIGHWAYS 322 AND 40 AT PLEASANTVILLE, THENCE ABOUT 0.3 MILE SOUTHEAST ALONG OCEAN HEIGHTS AVENUE.
01/01/1979 by NGS (MARK NOT FOUND)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1979 NOTE, RAILROAD CROSSING HAS BEEN REMOVED, ASSUMED DESTROYED AS CONCRETE SIGNAL BASE HAS BEEN DESTROYED.

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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