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Details for Benchmark: MD0211

N 41° 01.167 W 084° 02.783 (NAD 83)

Altitude: 734.12

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

Location:
In PUTNAM county, OH View Original Datasheet
Designation:
A 169
Marker Type:
bench mark disk
Setting:
massive structures
Stability:
Probably hold position/elevation well.

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a road trip to ottowa, go-cart racing at the fair grounds. checked out the magnificant court house

[Photos:]
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N 41° 01.195 W 084° 02.758

Station recovered as described in good condition. Correct coordinates listed above.

[Photos:]
photoBM_MD0211_1.jpg
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Looking west along the north side of the courthouse

Documented History (by the NGS)

01/01/1954 by CGS (MONUMENTED)
DESCRIBED BY COAST AND GEODETIC SURVEY 1954 AT OTTAWA. AT OTTAWA, ABOUT 2 BLOCKS EAST ALONG MAIN STREET FROM THE CROSSING OF THE BALTIMORE AND OHIO RAILROAD, AT THE NORTHEAST CORNER OF COURT HOUSE, 149 FEET NORTH OF NORTH CURB OF EAST MAIN STREET, 36 FEET WEST OF WEST CURB OF HICKORY STREET, IN THE TOP AND 1 FOOT SOUTHWEST OF THE NORTHEAST CORNER OF WATER TABLE AT NORTHEAST CORNER OF COURT HOUSE AND ABOUT 3 1/2 FEET 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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