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Details for Benchmark: MZ0125

N 42° 07.833 W 072° 44.850 (NAD 83)

Altitude: 153.13

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

Location:
In HAMPDEN county, MA View Original Datasheet
Designation:
152.06
Marker Type:
chiseled square
Setting:
light structures
Stability:
Mark of questionable or unknown stability.

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Hard to miss this one.

Large old stone mile marker B108. Easy find.

Documented History (by the NGS)

Unknown by (MONUMENTED)
01/01/1933 by NGS (GOOD)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1933 AT WESTFIELD. ON B AND A RR. 500 FT. WEST OF WESTFIELD B AND A RR STATION. 370 FT. WEST OF JUNCTION OF NYNH AND H AND B AND A RRS. ON TOP OF MILEPOST, B 108. 30 FT. SOUTH WEST OF CENTER LINE OF EAST BOUND TRACK. 4 FT. ABOVE TOP OF RAIL. NOTE--MARK IS 27 FEET SOUTHWEST OF THE CENTER LINE OF THE EAST-BOUND TRACK, AND IS ABOUT 3 FEET HIGHER THAN THE TOP OF THE RAIL.
01/01/1934 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1934 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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