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Details for Benchmark: MB2088

N 41° 33.355 W 080° 31.443 (NAD 83)

Altitude: 1004

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

Location:
In ASHTABULA county, OH View Original Datasheet
Designation:
MCMICHAELS
Marker Type:
NGS Benchmark
Setting:
setting not listed - see description
Stability:
Mark of questionable or unknown stability.

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Examined area described. Mark not found.

Documented History (by the NGS)

01/01/1941 by PADFW (MONUMENTED)
DESCRIBED BY PA DEPT FORESTS WTRS 1941 REACHED FROM THE INTERSECTION OF ROUTE 7 AND ROUTE 322 BY GOING E ON THE LATTER FOR 1.95 MILES, THENCE N ON ROUTE 524 FOR 1.7 MILES, THENCE E FOR 1/4 MILE TO A BOATHOUSE ON RESERVOIR SHORE LINE. THE STATION IS ABOUT 1/2 MILE NE OF THIS POINT, ABOUT 5 PACES INSHORE FROM THE HIGH-WATER MARK OF A PROMINENT POINT OF LAND. STATION IS MARKED WITH A PA. COORDINATE SYSTEM BRONZE TABLET, SET IN THE TOP OF A 6- BY 6- BY 42-INCH CONCRETE MONUMENT PROTRUDING 6 INCHES ABOVE GROUND LEVEL. SUBSURFACE MARK IS A CONCRETE SLAB 8 BY 8 BY 3 INCHES WITH 1/4-INCH COPPER PLUG FOR CENTER. NO OBSERVATION WAS TAKEN FROM THIS STATION, AND IT WAS OBSERVED ON FROM STATIONS BLACK AND NORTH BANK ONLY.
10/01/1993 by OHDT (MARK NOT FOUND)
RECOVERY NOTE BY OHIO DEPARTMENT OF TRANSPORTATION 1993 (BM) MARK NOT FOUND.
06/25/1996 by USPSQD (MARK NOT FOUND)
RECOVERY NOTE BY US POWER SQUADRON 1996 MARK NOT FOUND.

Control Text

  • The horizontal coordinates were established by classical geodetic methods and adjusted by the National Geodetic Survey in April 1998.
  • The orthometric height was scaled from a topographic map.
  • The Laplace correction was computed from DEFLEC99 derived deflections.
  • The geoid height was determined by GEOID99.

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