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Details for Benchmark: MC1018

N 41° 32.600 W 083° 15.583 (NAD 83)

Altitude: 600.21

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

Location:
In OTTAWA county, OH View Original Datasheet
Designation:
T 316
Marker Type:
bench mark disk
Setting:
massive structures with deep foundations
Stability:
Most reliable and expected to hold position/elevation well.

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Station recovered as described in good condition.

[Photos:]
photoBM_MC1018_1.jpg
photoBM_MC1018_2.jpg
photoBM_MC1018_3.jpg

Documented History (by the NGS)

01/01/1980 by NGS (MONUMENTED)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1980 10.0 KM WNW FROM OAK HARBOR. 9.8 KILOMETERS (6.1 MILES) WEST-NORTHWEST ALONG THE PENN CENTRAL RAILROAD FROM THE CROSSING OF STATE HIGHWAY 19 IN OAK HARBOR, 0.08 KILOMETER (0.05 MILE) EAST OF THE JUNCTION OF GRAYTOWN ROAD IN THE SMALL COMMUNITY OF GRAYTOWN, SET VERTICALLY IN THE SOUTH FACE OF THE SQUARE SHAPED GRAIN ELEVATOR ON THE PROPERTY OF LUCKEY FARMERS INC., 12.8 METERS (42.0 FEET NORTH OF THE NORTH RAIL OF THE MAIN TRACK, 0.3 METER (1 FOOT) WEST OF THE SOUTHWEST CORNER OF THE ELEVATOR. THE MARK IS 1.0 M ABOVE 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.
  • 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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