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Details for Benchmark: LW0785

N 41° 28.517 W 071° 34.450 (NAD 83)

Altitude: 110.59

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

Location:
In WASHINGTON county, RI View Original Datasheet
Designation:
S 1
Marker Type:
bench mark disk
Setting:
in a boulder
Stability:
May hold, but of type commonly subject to surface motion.

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Documented History (by the NGS)

01/01/1923 by CGS (MONUMENTED)
01/01/1934 by NGS (MARK NOT FOUND)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1934 1 MI SW FROM WEST KINGSTON. 1 MILE SOUTHWEST ALONG THE NEW YORK, NEW HAVEN AND HARTFORD RAILROAD FROM WEST KINGSTON (KINGSTON STATION), WASHINGTON COUNTY, 14-1/2 RAILS NORTHEAST OF MILEPOST P 28-NL 34, BETWEEN WUT POLES 71-52 AND 71-53, 3 RAILS NORTHEAST OF A FARM-ROAD CROSSING, 97 FEET SOUTHEAST OF THE SOUTHEAST RAIL, IN A FLAT BOULDER FLUSH WITH THE GROUND AND SHOWING 4-FEET BY 3-FEET, AND ABOUT 2 FEET ABOVE THE TRACK. A STANDARD DISK, STAMPED ELEV 111.529 FT S 1 1923. NOTE-- THE DESCRIBED LOCATION WOULD PUT THE MARK IN THE SOUTHEAST EDGE OF A GRAVELED ROAD WHICH PARALLELS THE TRACK AT THIS POINT.

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 1992. * This is a POSTED BENCH MARK height. Code A indicates a distribution rate of 0.0 thru 1.0 mm/km.
  • 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.