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Details for Benchmark: PE0382

N 44° 28.117 W 068° 48.583 (NAD 83)

Altitude: 4.64

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

Location:
In WALDO county, ME View Original Datasheet
Designation:
TIDAL 3 STA 30
Marker Type:
drill hole
Setting:
in a boulder
Stability:
May hold, but of type commonly subject to surface motion.

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Documented History (by the NGS)

Unknown by CGS (MONUMENTED)
01/01/1962 by NGS (GOOD)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1962 0.2 MI N FROM FORT POINT. ABOUT 0.2 MILE NORTH ALONG A TRAIL FROM THE U.S. COAST GUARD STATION AND LIGHTHOUSE AT FORT POINT ON CAPE JELLISON, ABOUT 300 YARDS NORTHWEST ALONG WATER EDGE FROM THE END OF THE TRAIL LEADING TO THE LIGHTHOUSE, A DRILL HOLE ON THE TOP OF A 10-BY-8-FOOT BOULDER PROJECTING 7 FEET ABOVE THE LEVEL OF THE GROUND AND SURROUNDED BY WATER AT HIGH TIDE, 195 FEET SOUTHEAST FROM THE INSHORE END OF AN OLD WHARF, 75 FEET NORTHEAST OF THE NORTH BANK OF CAPE JELLISON, 180 YARDS NORTHWEST OF TIDAL 30 (1948) AND 7 FEET ABOVE THE LEVEL OF THE GROUND.

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.
  • This Tidal Bench Mark is designated as VM 13998 by the Center for Operational Oceanographic Products and Services.
  • 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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