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Details for Benchmark: HU1161

N 38° 22.233 W 075° 04.233 (NAD 83)

Altitude: 4.62

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

Location:
In WORCESTER county, MD View Original Datasheet
Designation:
OC 3
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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N 38° 22.255 W 075° 04.246

Since we were eating nearby, I looked for benchmarks and spotted this one which looked like I just might be able to do a quick recovery. Ernmark's pictures showed me exactly where it was even though that mark on the sidewalk has faded away, but I still couldn't believe that my first probe struck something solid. It was a good 6 inches down, and I didn't have any excavation tools with me, so I couldn't uncover it and can't say for sure it was the mark, but probing around it suggested that the size was about right and it really was exactly where Ernmark's hole was when he uncovered it over a decade ago. Although this isn't a find, I'm still attaching the coordinates that reflect Ernmark's hole.

Wasn't able to read previous logs so i was unable to find it. GPS took me to the median

Found the location, but appears the Benchmark could have been dug up. Reason being, there was a hold about 18" from the sidewalk. Had my White's Bulleyes metal detector with me, I continued to search the area, but did not find the mark.

Frank (Balto. MD)

[This entry was edited by 191ocmd on Monday, November 27, 2006 at 3:43:35 PM.]

..could still see the arrow on the sidewalk.....and thought I spied some loose ground, so in I went - yep, it was there ! (It is only slightly below ground level, but I covered it back up - I suspect it was used by a surveyor within the past year). This is currently a Bank of America branch...

[Photos:]
photoOC 3 (HU1161) disk - Ocean City, MD
photoOC 3 (HU1161) area - view looking SSW
photoOC 3 (HU1161) area - view looking NW

There's no doubt I was in the right place—“O.C. 3” and an arrow were painted on the sidewalk adjacent to the bank lawn. However, the disk was not visible. Discreet probing was not enough to locate this mark, and I wasn't about to dig up the lawn in full view of the bank employees and patrons. This might be easier to spot in Winter when the grass is sparse.

Zhanna

[Photos:]
photo“O.C. 3” — but where is the mark?
photoThis Truckers and Savings bank is now a branch of Bank of America.

Documented History (by the NGS)

01/01/1977 by MDDT (MONUMENTED)
DESCRIBED BY MARYLAND DEPARTMENT OF TRANSPORTATION 1977 IN OCEAN CITY. LOCATED 2.5 MI N ALONG MD RTE 528 (COASTAL HIGHWAY) FROM THE POST OFFICE IN OCEAN CITY IN THE LAWN OF THE TRUCKERS AND SAVINGS BANK (N OF 44TH ST), 63.4 W OF THE CENTERLINE OF MD RTE 528, 67.3 FT NE OF THE NE CORNER OF THE BANK AND 34.7 FT SE OF THE SE CORNER OF THE BARDY HALL APT BUILDING. ABOUT LEVEL WITH LAWN.

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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