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Details for Benchmark: MD0026

N 41° 34.993 W 084° 26.041 (NAD 83)

Altitude: 791.19

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

Location:
In WILLIAMS county, OH View Original Datasheet
Designation:
792
Marker Type:
bench mark 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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Benchmark #1. Yay! Found where the pictures indicate while the kids played at the park. Now thats a big tire!! I will upload my ground zero marked by a wooden stake. The disc was not uncovered after a lengthy search. You will likely need extreme luck or a metal probing tool to "hit" the disc. TFTBM!

[Photos:]
photoBenchmark #1
West Unity, Ohio.

this is what I found at the posted coords. see pic.

[Photos:]
photoP1010331
MD0026

I gotta admit, I wouldn't have found this without Grizz's pics from 4 years ago. It was covered in dirt. This is my 100th Benchmark.

[Photos:]
photoMD0026

Station is safe, and still chopped up a bit, and hard to see in all the grass.

Coords are: N 41° 34.994 W 084° 26.038

[Photos:]
photoMD0026

could not locate it.

Station recovered as described in fair condition. The surface of the pipe cap has been gouged, possibly by a mowing machine. The 7 9 2 appears to have had the 7 double struck, or it could possibly be just another gouge on the surface.

[Photos:]
photoBM_MD0026_1.jpg
photoBM_MD0026_2.jpg
photoBM_MD0026_3.jpg
Looking east

Since I played in this park as a child and don't ever remember seeing a benchmark here, I'm going to conclude that it is buried, since it was recovered in 1996. One will need a metal detector to find it.

[Photos:]
photothis is where it should be
photoview to the west
photoview to the south

Documented History (by the NGS)

Unknown by USGS (MONUMENTED)
01/01/1934 by NGS (GOOD)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1934 AT WEST UNITY. AT WEST UNITY, WILLIAMS COUNTY, ON THE WABASH RAILROAD, 33 YARDS WEST OF THE NORTHWEST CORNER OF THE STATION, AT A ROAD CROSSING, 15 YARDS NORTH OF THE NORTH RAIL, 15 YARDS EAST OF THE CENTERLINE OF THE BITUMINOUS ROAD, AND ABOUT 1/2 FOOT LOWER THAN THE TRACK. A UNITED STATES GEOLOGICAL SURVEY STANDARD CAP, STAMPED OHIO 792 AND RIVETED ON THE TOP OF A 3-1/2 INCH IRON PIPE.
01/30/1996 by WOOLPT (GOOD)
RECOVERY NOTE BY WOOLPERT CONSULTANTS 1996 (BS) RECOVERED AS DESCRIBED.

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 differential leveling and adjusted by the National Geodetic Survey in June 1991. WARNING-GPS observations at this control monument resulted in a GPS derived orthometric height which differed from the leveled height by more than one decimeter (0.1 meter).
  • 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.
  • 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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