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Details for Benchmark: LW1225

N 41° 59.667 W 071° 30.083 (NAD 83)

Altitude: 292.4

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

Location:
In PROVIDENCE county, RI View Original Datasheet
Designation:
F 29
Marker Type:
bench mark disk
Setting:
in rock outcrop
Stability:
Most reliable and expected to hold position/elevation well.

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N 41° 59.661 W 071° 30.030

Found as described.

[Photos:]
photoLW1225 - 1
photoLW1225 - 2

Had to do some serious escavation to get the dirt and plants out of the way, but found in good condition today while in the area for a MeetUp bike ride on the nearby rail trail

[Photos:]
photoimage
Disc
photoimage
Location
photoimage
Zooming out from location
photoimage

Right where it should be

[Photos:]
photoLW1225
photoArea of LW1225

Tried to recover this , but you will need a Metal detector
for this one. Too much overgrowth.

[This entry was edited by CRAZY DIAMONDS on Saturday, August 02, 2008 at 5:47:04 PM.]

Documented History (by the NGS)

01/01/1969 by CGS (MONUMENTED)
DESCRIBED BY COAST AND GEODETIC SURVEY 1969 AT WOONSOCKET. AT WOONSOCKET, ABOUT 0.8 MILE SOUTH ALONG PARK AVENUE FROM THE JUNCTION OF STATE HIGHWAY 122, THENCE 0.55 MILE EAST ALONG LOGEE STREET, 58 FEET WEST OF THE CENTER OF THE INTERSECTION OF LOGEE STREET, ROBERGE AVENUE AND MT. ST CAHRLES AVENUE, SET IN THE TOP OF THE SOUTHEAST END OF A LONG LOW ROCK CUT, 25 FEET SOUTHWEST OF THE CENTER LINE OF LOGEE STREET, 31 FEET NORTH OF THE CENTER LINE OF ROBERGE AVENUE, 1 FOOT NORTHWEST OF THE SOUTHEAST END OF THE ROCK AND 2 1/2 FEET ABOVE THE LEVEL OF THE STREET.
01/01/1988 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1988 (RMS) 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.

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