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Details for Benchmark: LW0692

N 41° 29.367 W 071° 29.383 (NAD 83)

Altitude: 98.07

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

Location:
In WASHINGTON county, RI View Original Datasheet
Designation:
D 23
Marker Type:
bench mark disk
Setting:
in rock outcrop
Stability:
Most reliable and expected to hold position/elevation well.

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Documented History (by the NGS)

01/01/1969 by CGS (MONUMENTED)
DESCRIBED BY COAST AND GEODETIC SURVEY 1969 1.8 MI E FROM KINGSTON. 1.75 MILES EAST ALONG STATE HIGHWAY 138 FROM THE JUNCTION OF STATE HIGHWAY 108 AT KINGSTON, 0.15 SOUTHWEST OF THE JUNCTION OF STONET FORT ROAD LEADING NORTHWEST, SET ON THE TOP AND AT ABOUT THE HIGHEST PART OF A LARGE MASS OF EXPOSED BEDROCK, SOUTH OF A SMALL POND, 48 FEET NORTHWEST OF THE CENTER LINE OF THE HIGHWAY, 9 FEET EAST OF THE WEST EDGE OF THE EXPOSED PORTION OF ROCK AND 6 FEET ABOVE THE LEVEL OF THE HIGHWAY. NOTE-- MARK IS ON PRIVATE PROPERTY. PERMISSION GRANTED TO ESTABLISH SAME.
01/01/1987 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1987 (AFA) RECOVERED IN GOOD CONDITION.
01/01/1989 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1989 (AFA) RECOVERED IN GOOD CONDITION.
07/29/1995 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1995 RECOVERED IN GOOD CONDITION.

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.