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Details for Benchmark: LW5676

N 41° 59.710 W 071° 33.391 (NAD 83)

Altitude: 218.4

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

Location:
In PROVIDENCE county, RI View Original Datasheet
Designation:
NS 014
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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Spotted the witness post while zooming down the highway. Looped around to park and make the find. Recovered in good condition.

[Photos:]
photoDisk and Buddha, North Smilthfield RI

Documented History (by the NGS)

01/01/1987 by RIGS (MONUMENTED)
DESCRIBED BY RHODE ISLAND GEODETIC SURVEY 1987 THE STATION IS LOCATED ABOUT 2.1 KM (1.30 MI) EAST SOUTHEAST OF SLATERSVILLE CENTER, ON THE WEST SIDE OF THE HIGHWAY. OWNERSHIP--STATE RIGHT OF WAY. TO REACH FROM THE RHODE ISLAND/MASSACHUSETTS STATE LINE, GO SOUTH FOR 3.48 KM (2.15 MI) ON STATE HIGHWAY 146 TO THE STATION ON THE RIGHT, NEAR A RAILROAD BRIDGE OVER HIGHWAY 146. IT IS 37.5 M (123.0 FT) NORTHWEST FROM THE NORTHWEST CORNER OF THE CENTER CONCRETE PIER SUPPORTING A RAILROAD BRIDGE, 8.4 M (27.6 FT) WEST FROM THE CENTERLINE OF TWO TRAVEL LANES OF HIGHWAY 146 SOUTHBOUND, 3.35 M (10.8 FT) SOUTHEAST FROM THE CENTER OF A ROUND METAL DROP INLET, 0.9M(3.0 FT) EAST FROM A FIBERGLASS WITNESS POST. 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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