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Details for Benchmark: LW5727

N 41° 29.530 W 071° 33.106 (NAD 83)

Altitude: 117.9

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

Location:
In WASHINGTON county, RI View Original Datasheet
Designation:
PLEASANT
Marker Type:
metal rod
Setting:
stainless steel rod
Stability:
Probably hold position/elevation well.

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Documented History (by the NGS)

01/01/1987 by AEROS (MONUMENTED)
DESCRIBED BY AERO SERVICE CORPORATION 1987 TO REACH FROM THE INTERSECTION OF RTE 138 AND RTE 2, GO SOUTHEAST ON RTE 138, 1.4 KM (0.85 MI) TO FAIRGROUND ROAD, TURN LEFT AND GO NORTHEAST ON FAIRGROUND ROAD 1.0 KM (0.60 MI) , CROSSING WAITES CORNER ROAD, TO THE STATION ON THE RIGHT. IN SOUTH KINGSTOWN ON THE SOUTHEAST SIDE OF FAIRGROUND ROAD IN AN OPEN AREA WITH SOD FIELDS ON EACH SIDE OF THE ROAD, THE MARK IS 5.2 M (17.1 FT) SOUTHEAST FROM THE CENTER OF FAIRGROUND ROAD AND 1.61 M (5.3 FT) NORTHWEST FROM POLE NUMBER 4967. NOTE--ACCESS TO DATUM POINT IS HAD THROUGH A 5-INCH LOGO CAP.
09/01/1994 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1994 RECOVERED IN GOOD CONDITION.
10/01/1997 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1997 RECOVERED IN GOOD CONDITION.

Control Text

  • The horizontal coordinates were established by GPS observations and adjusted by the National Geodetic Survey in August 1998.
  • The NAVD 88 height was computed by applying the VERTCON shift value to the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.) The vertical order pertains to the superseded datum.
  • The X, Y, and Z were computed from the position and the ellipsoidal ht.
  • The Laplace correction was computed from DEFLEC99 derived deflections.
  • The ellipsoidal height was determined by GPS observations and is referenced to NAD 83.
  • The geoid height was determined by GEOID99.