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Details for Benchmark: OL0208

N 43° 45.083 W 087° 42.900 (NAD 83)

Altitude: 633.45

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

Location:
In SHEBOYGAN county, WI View Original Datasheet
Designation:
CITY OF SHEBOYGAN C OF S
Marker Type:
survey disk
Setting:
light structures
Stability:
Mark of questionable or unknown stability.

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N 43° 45.061 W 087° 42.850

Discovered while exploring Sheboygan.

[Photos:]
photoBenchmark

Easy find.

As noted in previous logs....all is well. My readings were N43 45.068 W087 42.853 with 17 feet accuracy.

Team1RC

N 43° 45.061 W 087° 42.849

It's there in good condition!
Carole found it!

[Photos:]
photoIt's There Near the Wall
photoBenchmark & GPS

Documented History (by the NGS)

Unknown by WI4330 (MONUMENTED)
01/01/1972 by NGS (GOOD)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1972 AT SHEBOYGAN. AT SHEBOYGAN, AT THE CITY HALL, NEAR THE SOUTH ENTRANCE, 118 FEET EAST OF THE CENTER LINE OF NORTH 9 TH STREET, 51 FEET NORTH OF THE CENTER LINE OF CENTER AVENUE, SET IN THE TOP OF THE NORTHWEST CORNER OF THE WEST STONE BALUSTRADE, 0.3 FOOT SOUTH OF THE SOUTH BRICK WALL OF THE BUILDING, 9 FEET WEST OF THE CENTER OF THE SOUTH ENTRANCE TO BUILDING AND 4 FEET ABOVE THE STREET LEVEL. SEC 23, T 15N, R 23E.
01/01/1974 by NOS (GOOD)
RECOVERY NOTE BY NATIONAL OCEAN SERVICE 1974 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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