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Details for Benchmark: MC1262

N 41° 30.250 W 082° 56.933 (NAD 83)

Altitude: 577

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

Location:
In OTTAWA county, OH View Original Datasheet
Designation:
PORT CLINTON COE 1976
Marker Type:
survey disk
Setting:
setting not listed - see description
Stability:
Mark of questionable or unknown stability.

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The concrete at the end of the breakwater has been redone. There is no evidence of the disk.

Found this while maintaining my nearby cache. Notice the new coords by Grizzflyer.

N 41° 31.141 W 082° 56.118

Station recovered as described in good condition. Note that the "adjusted" coordinates provided in the data sheet are in error by 1.25 miles. Correct coordinates provided above.

[Photos:]
photoBM_MC1262_1.jpg
photoBM_MC1262_2.jpg
photoBM_MC1262_3.jpg
photoBM_MC1262_4.jpg
On breakwater, Looking NE towards the station.
photoBM_MC1262_5.jpg
In parking lot, looking NE towards the station below the green navigation light.

You can't read it very well, but mattopia and I came across this while planning a cache! Nice view!

Documented History (by the NGS)

01/01/1976 by USE (MONUMENTED)
DESCRIBED BY US ENGINEERS 1976 (RES) THE STATION IS LOCATED ALONG THE SOUTH SHORE OF LAKE ERIE AT THE ENTRANCE TO THE HARBOR IN THE TOWN OF PORT CLINTON. IT IS A STANDARD U.S. ARMY CORPS OF ENGINEERS DISK STAMPED PORT CLINTON (THE DISK WAS FOUND IN PLACE AND WAS CONTROLLED BY THIS SURVEY). IT IS LOCATED ON THE NORTH END OF THE EAST BREAKWATER NEAR THE ENTRANCE LIGHT. IT IS POSSIBLE TO WALK TO THIS STATION. HOWEVER, FOR EASE IN TRANSPORTING EQUIPMENT, IT IS RECOMMENDED A BOAT BE USED. HEIGHT OF LIGHT ABOVE STATION MARK 1.5 METERS.

Control Text

  • The horizontal coordinates were established by classical geodetic methods and adjusted by the National Geodetic Survey in April 1998. No horizontal observational check was made to the station.
  • The NAVD 88 height was computed by applying the VERTCON shift value to the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.)
  • The Laplace correction was computed from DEFLEC99 derived deflections.
  • The geoid height was determined by GEOID99.

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