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Details for Benchmark: PE0273

N 44° 21.883 W 068° 18.900 (NAD 83)

Altitude: 74.26

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

Location:
In HANCOCK county, ME View Original Datasheet
Designation:
Y 144
Marker Type:
bench mark disk
Setting:
in rock outcrop
Stability:
Most reliable and expected to hold position/elevation well.

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Please see the complete recovery, including text and photos, at my website: [b][url=http://surveymarks.planetzhanna.com/surveymarks/pe0273/]PE0273 - Y 144[/url][/b].

Zhanna

This entry was edited by Zhanna on Friday, 07 December 2012 at 02:40:29 UTC.

N 44° 21.879 W 068° 18.914

While vacationing on M.D.I. I decided to search for a few local benchmarks. I drove out along Route 233 from Bar Harbor and easily found the mark using the historical description. At the station my Garmin GPSmap76 receiver indicated approximately 66 feet from the posted coordinates. The disc is quite visible and is in excellent condition. ~Rich in NEPA~

[Photos:]
photoGPSr and the station mark.
photoClose-up of the station mark.
photoThe general area near the station mark.

Documented History (by the NGS)

1/1/1962 by CGS (MONUMENTED)
1/1/1965 by NGS (GOOD)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1965 1.2 MI E FROM SOMESVILLE. 0.45 MILE NORTH ON STATE HIGHWAY 102 FROM THE LIBRARY IN SOMESVILLE, THENCE 0.95 MILE SOUTHEAST ON STATE HIGHWAY 198, 0.15 MILE EAST OF MT. DESERT CAMP-GROUND, 132 FEET SOUTHEAST OF THE CENTER OF A PRIVATE ROAD LEADING SOUTHWEST, 61 FEET SOUTHWEST OF THE CENTER AND 12 FEET ABOVE HIGHWAY 198, SET IN A DRILL HOLE IN THE TOP OF A 7 X 8 FOOT OUTCROP ON THE TOP OF A ROCK HIGHWAY CUT.
1/1/1989 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1989 (ELG) 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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