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Details for Benchmark: MB1797

N 41° 26.683 W 081° 37.467 (NAD 83)

Altitude: 807.35

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

Location:
In CUYAHOGA county, OH View Original Datasheet
Designation:
78 5 CRGS
Marker Type:
survey disk
Setting:
abutments and piers of large bridges
Stability:
Most reliable and expected to hold position/elevation well.

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A satellite image of the cordons for this show that it's in the middle of the road and Going by the last log of 2004 its pretty much the same. The description however says it's near there. With satellites being more advanced and coordinates being able to be more accurate I view the 2004 image and see the stone of the bridge it lays on. I saw that but no survey marker. I think this might be gone.

looked but could not find it

N 41° 26.675 W 081° 37.487

Mark was located in good condition. It is stamped 1930 10. Corrected description, it is on the northeast end of the bridge over Mill Creek.

[Photos:]
photoMark with GPS

Documented History (by the NGS)

01/01/1939 by CRGS (MONUMENTED)
01/01/1983 by NGS (GOOD)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1983 IN CLEVELAND. IN CLEVELAND, ALONG WARNER ROAD, AT THE NORTHWEST END OF A BRIDGE OVER MILL CREEK, 7.89 METERS (25.9 FT) WEST OF THE CENTERLINE OF WARNER ROAD, 3.20 METERS (10.5 FT) WEST OF UTILITY POLE 523753, 0.40 METER (1.3 FT) NORTH OF THE NORTH RAIL OF THE BRIDGE. NOTE--DISK IS A CUYAHOGA COUNTY DRAINAGE STRUCTURE MARK. THE MARK IS 0.23 M ABOVE WARNER ROAD.
06/07/1994 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1994 RECOVERED IN GOOD CONDITION.
10/28/1995 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1995 RECOVERED IN GOOD CONDITION.

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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