Skip to Content

Details for Benchmark: MF0081

N 41° 31.233 W 088° 10.717 (NAD 83)

Altitude: 583.15

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

Location:
In WILL county, IL View Original Datasheet
Designation:
G 142
Marker Type:
bench mark disk
Setting:
massive structures
Stability:
Probably hold position/elevation well.

Must Read!

Benchmarks may be on private property or in dangerous locations. Obey local laws. By using the services on Geocaching.com you agree to this disclaimer.

Found while attending Airport Fest, as this location is not always open to the public.

Located this benchmark while attending the Joliet Park District Airport Festival. I always knew it was there but wasn't sure if I could just walk in to the airport to look for it.

[Photos:]
photoThe disk
photoLocation of the disc

Logging the find without a pic. Trust me. Funny thing: I stood by the gate, unsure if I should just walk out there. But the helicopter that was landing right there influenced my decision. Awesome - the pilot landed practically right next to a red Dodge pick-up!

Found in good condition

[Photos:]
photoIMG_5614

It's still exactly where it says. Recovered in good condition, as they say.

[Photos:]
photopic16.jpg

Documented History (by the NGS)

1/1/1947 by CGS (MONUMENTED)
DESCRIBED BY COAST AND GEODETIC SURVEY 1947 5.2 MI W FROM JOLIET. ABOUT 5.15 MILES WEST ALONG U.S. HIGHWAY 52 FROM THE COURT HOUSE AT JOLIET, AT THE JOLIET MUNICIPAL AIRPORT, SET VERTICALLY IN THE NORTHEAST FACE AT THE EAST CORNER OF THE BRICK ADMINSTRATION BUILDING, ALSO, THE WEATHER BUREAU STATION, 1.3 FEET NORTHWEST OF THE EAST CORNER OF THE BUILDING AND 3.2 FEET ABOVE THE SIDE WALK.
1/1/1979 by LOCENG (GOOD)
RECOVERY NOTE BY LOCAL ENGINEER (INDIVIDUAL OR FIRM) 1979 RECOVERED IN GOOD CONDITION.

Control Text

  • This mark is at Joliet Park District Airport (JOT)
  • 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.

Advertising with Us

Return to the Top of the Page