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Details for Benchmark: ME1481

N 41° 25.133 W 087° 52.983 (NAD 83)

Altitude: 710.2

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

Location:
In WILL county, IL View Original Datasheet
Designation:
M 26
Marker Type:
bench mark disk
Setting:
light structures
Stability:
Mark of questionable or unknown stability.

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In good shape.

[Photos:]
photoimage
N 41° 25.155 W 087° 53.000

Found at the above coords.

[Photos:]
photoME1481
photoME1481 setting

Found in good condition.

[Photos:]
photoME1481

Documented History (by the NGS)

1/1/1934 by CGS (MONUMENTED)
1/1/1954 by NGS (GOOD)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1954 3.3 MI N FROM ANDRES. ABOUT 3.3 MILES NORTH ALONG U.S. HIGHWAY 45 FROM THE CROSSING OF THE CHICAGO, MILWAUKEE, ST. PAUL AND PACIFIC RAILROAD AT ANDRES, ABOUT 5.85 MILES SOUTH ALONG HIGHWAY 45 FROM NEW YORK CENTRAL RAILROAD OVERPASS OVER HIGHWAY AT FRANKFORT, ABOUT 0.45 MILE SOUTH OF INTERSECTION OF MANHATTAN-MONROE ROAD, ABOUT 0.55 MILE NORTH OF A CROSSROAD AND GREEN GARDEN METHODIST CHURCH AND CEMETERY, IN THE TOP AND 11 FEET SOUTH OF NORTH END OF EAST HEAD WALL OF A 12-FOOT CONCRETE CULVERT UNDER HIGHWAY, 22 FEET EAST OF CENTER LINE OF HIGHWAY AND ABOUT 1 FOOT ABOVE LEVEL OF HIGHWAY.
1/1/1987 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1987 (IB) RECOVERED IN GOOD CONDITION.
5/20/1988 by USGS (GOOD)
RECOVERY NOTE BY US GEOLOGICAL SURVEY 1988 (LCR) 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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