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Details for Benchmark: LW5677

N 41° 59.407 W 071° 33.211 (NAD 83)

Altitude: 265.54

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

Location:
In PROVIDENCE county, RI View Original Datasheet
Designation:
NS 015
Marker Type:
survey 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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Someone was nice enough to stake and paint this. Recovered in good condition, although it has a SHARP mover nick in it.

[Photos:]
photoDisk and token, North Smithfield RI

Documented History (by the NGS)

01/01/1987 by RIGS (MONUMENTED)
DESCRIBED BY RHODE ISLAND GEODETIC SURVEY 1987 THE STATION IS LOCATED ABOUT 2.6 KM (1.60 MI) SOUTHEAST OF SLATERSVILLE CENTER, ON THE WEST SIDE OF THE ROAD.OWNERSHIP--STATE RIGHT OF WAY. TO REACH FROM STATE HIGHWAY 146 AT THE RHODE ISLAND/MASSACHUSETTS STATE LINE, GO SOUTH FOR 4.0 KM (2.50 MI) ON STATE HIGHWAY 146 TO THE STATION ON THE RIGHT, IN A GRASS ISLAND. IT IS 31.5 M (103.3 FT) NORTH NORTHWEST FROM AN ALUMINUM LIGHT POLE 81-1, 22.1 M4 (103.48 FT) SOUTH SOUTHEAST FROM AN ALUMINUM LIGHT POLE 82-1, 21.2 M (69.6 FT) EAST SOUTHEAST FROM THE APPROXIMATE CENTERLINE OF THE EXIT RAMP FROM HIGHWAY 146 SOUTHBOUND TO POUND HILL ROAD, 11.3 M (37.1 FT) WEST SOUTHWEST FROM THE CENTERLINE OF TWO TRAVEL LANES OF HIGHWAY 146 SOUTHBOUND. THE MARK IS SET FLUSH WITH THE SURROUNDING GROUND.

Control Text

  • The horizontal coordinates were established by classical geodetic methods and adjusted by the National Geodetic Survey in August 1998.
  • The orthometric height was determined by differential leveling and adjusted by the National Geodetic Survey in April 1995.
  • The Laplace correction was computed from DEFLEC99 derived deflections.
  • 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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