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Details for Benchmark: MY2589

N 42° 30.055 W 071° 03.037 (NAD 83)

Altitude: 121

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

Location:
In MIDDLESEX county, MA View Original Datasheet
Designation:
FAN 1935
Marker Type:
NGS Benchmark
Setting:
setting not listed - see description
Stability:

Reference Points

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This mark was monumented in 1935 and has not been reported recovered in the 73 years since then. I believe it has been destroyed.

My GPSr puts the (Adjusted) location of this BM approximately between #8 and #8a Orsini Drive in Wakefield. Most of the homes in this 25-year-old (or so) subdivision have been built upon blasted-out rock ledges. It appears that the BM was blasted away along with the ledge.

My GPSr puts the former location of the BM in or just (N) of the driveway of #8. There are surviving ledge rocks just (N) of the driveway, and they do have many drill holes in them, but these appear to be modern drill holes, left over from the extensive blasting effort. The GPSr-indicated position of the BM is likely under the asphalt of the driveway to #8.

Documented History (by the NGS)

01/01/1935 by MAGS (MONUMENTED)
DESCRIBED BY MASSACHUSETTS GEODETIC SURVEY 1935 U.S.C. AND G.S. AND STATE SURVEY STANDARD DISK SET IN HIGHEST POINT OF LEDGE, 75 FT. ABOVE STREET LEVEL, 300 FT. NORTH OF WATER ST., OPPOSITE ITS JUNCTION WITH FARM ST. 93.0 FT. NORTHWEST OF EXTENDED LINE OF TELEGRAPH POLES ALONG WEST SIDE OF FARM ST. 14.9 FT. SOUTH OF A 3/4 INCH DRILL HOLE IN LEDGE. AND 19.5 FT. NORTH OF ANOTHER 3/4 INCH DRILL HOLE IN THE SAME LEDGE.

Control Text

  • The horizontal coordinates were established by classical geodetic methods and adjusted by the National Geodetic Survey in June 1998.
  • The orthometric height was scaled from a topographic map.
  • The Laplace correction was computed from DEFLEC99 derived deflections.
  • The geoid height was determined by GEOID99.

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