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Details for Benchmark: MC1797

N 41° 35.291 W 083° 45.676 (NAD 83)

Altitude: 641

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

Location:
In LUCAS county, OH View Original Datasheet
Designation:
MANNIK
Marker Type:
survey disk
Setting:
set into the top of a round concrete monument
Stability:
May hold, but of type commonly subject to surface motion.

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Station recovered as described in good condition. It is at the edge of a cultivated farm field and is in danger of being damaged by farm equipment. No witness post present. It is 48.5 feet S of LCE monument and benchmark 300, photos of which are included to assist future recoveries.

[Photos:]
photoBM_MC1797_1.jpg
photoBM_MC1797_2.jpg
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photoBM_MC1797_4.jpg
photoBM_MC1797_5.jpg

Documented History (by the NGS)

01/01/1993 by OH-095 (MONUMENTED)
DESCRIBED BY LUCAS COUNTY OHIO 1993 THE STATION IS IN LUCAS COUNTY, OHIO ABOUT 6.0 MILES WEST OF THE CITY OF MAUMEE. TO REACH THE STATION FROM THE INTERSECTION OF CONANT STREET (U.S. 20) AND ILLINOIS AVENUE (U.S. 20A) PROCEED WEST ALONG ILLINOIS AVENUE 2.75 MILES TO ITS ANGLE POINT WITH MAUMEE WESTERN ROAD. CONTINUE WEST ALONG MAUMEE WESTERN ROAD 3.0 MILES TO ITS INTERSECTION WITH CRISSEY ROAD. TURN RIGHT AND PROCEED NORTH ALONG CRISSEY ROAD 1.0 MILES TO THE STATION ON THE RIGHT. THE STATION IS A 3.5 INCH BRASS LUCAS COUNTY ENGINEER DISK SET IN THE TOP OF A 12 INCH DIAMETER CONCRETE MONUMENT FLUSH WITH THE GROUND SURFACE IS STAMPED --MANNIK 8-17-93 1993--. THE STATION IS 29.2 FEET EAST FROM THE CENTERLINE OF CRISSEY ROAD, 72.2 FEET SOUTHEAST FROM A POWER POLE LOCATED WEST OF THE ROAD, 58.7 FEET SOUTHEAST FROM A BOLT IN THE CENTERLINE OF CRISSEY ROAD, AND 48.5 FEET SOUTH FROM A LUCAS COUNTY ENGINEER MONUMENT.

Control Text

  • The horizontal coordinates were established by GPS observations and adjusted by the National Geodetic Survey in April 1998.
  • The orthometric height was determined by GPS observations and a high-resolution geoid model.
  • The X, Y, and Z were computed from the position and the ellipsoidal ht.
  • The Laplace correction was computed from DEFLEC99 derived deflections.
  • The ellipsoidal height was determined by GPS observations and is referenced to NAD 83.
  • The geoid height was determined by GEOID99.

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