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Details for Benchmark: MF0113

N 41° 35.783 W 088° 03.217 (NAD 83)

Altitude: 607.75

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

Location:
In WILL county, IL View Original Datasheet
Designation:
N 140
Marker Type:
bench mark 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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There has been some resodding done and new sidewalks put down.
But the benchmark doesn't look disturbed. It's in good condition.

[This entry was edited by Team Fawlty on Wednesday, June 24, 2009 at 10:28:58 AM.]

[Photos:]
photoMF0113 Setting
photoMF0113

No problem locating this one. I was a bit surprised it has survived all these years considering it is located right out in the open.

found it

Still there and still in good condition.

[Photos:]
photoMF0113

Found this one a while ago but forgot to log it.

N 41° 35.793 W 088° 03.233

Those were the coords I got. Mark is in good shape.

[Photos:]
photoMF0113 setting
photoMF0113

Found

N 41° 35.790 W 088° 03.235

This is Benchmark # N140 placed in 1947. It is located in Lockport, IL on the S.E. corner of State St. and 2nd St. Very easy to find. My GPS showed the elevation at 602ft.

[last edit: 8/9/2003 8:55:29 AM PST]

[Photos:]
photoMF0113 - BenchMark N140 - Lockport, IL 01
Close view.
photoMF0113 - BenchMark N140 - Lockport, IL 02
Site view
photoMF0113 - BenchMark N140 - Lockport, IL 03
Site view, from accross the street. It is inbetween the stop lights.
photoMF0113 - BenchMark N140 - Lockport, IL - Mascot
BenchMark with Möbius Mascot.

Documented History (by the NGS)

01/01/1947 by CGS (MONUMENTED)
DESCRIBED BY COAST AND GEODETIC SURVEY 1947 AT LOCKPORT. AT LOCKPORT, ABOUT 0.5 MILE NORTHEAST ALONG STATE HIGHWAY 4A FROM ITS INTERSECTION WITH STATE HIGHWAY 7, SET IN THE SOUTHEAST QUARTER OF THE INTERSECTION OF SECOND STREET, 30 FEET EAST OF THE EAST CURB OF STATE STREET (STATE HIGHWAY 4A), 20.5 FEET SOUTH OF THE CENTER LINE OF THE SOUTH CURB OF SECOND STREET, 46.5 FEET NORTHWEST OF THE NORTHWEST CORNER OF THE HOUSE AT 202 NORTH STATE STREET, 2 FEET NORTH OF THE NORTH EDGE OF THE CONCRETE SIDE WALK, 1.5 FEET EAST OF THE EAST EDGE OF A NORTH-SOUTH WALK, ABOUT 2 FEET ABOVE THE INTERSECTION AND SET IN THE TOP OF A CONCRETE POST PROJECTING 4 INCHES.

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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