Skip to Content

Details for Benchmark: MF1266

N 41° 20.783 W 088° 48.000 (NAD 83)

Altitude: 488

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

Location:
In LA SALLE county, IL View Original Datasheet
Designation:
E 231 RESET 1979
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.

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.

Was buried a bit but we dug it out. Looks in good shape.

[Photos:]
photoDSC00582

lemon16 and I were about to give up when my foot slipped into a small depression in the earth. After a little digging, we found it!

[Photos:]
photoBenchmark E231 Reset
photoA bit blurry close-up

Found it! Tricky find, it was buried in the dirt, had to dig it out.

Found in good condition.

[Photos:]
photoMF1266

Documented History (by the NGS)

1/1/1979 by NGS (MONUMENTED)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1979 1.4 MI SE FROM OTTAWA. 1.4 MILE SOUTHEAST ALONG A BLACKTOP ROAD ALONG THE SOUTHSIDE OF THE ABANDONED ILLINOIS AND MICHIGAN CANAL, FROM THE EASTEND OF A FOOT BRIDGE BRIDGE ACROSS THE FOX RIVER OTTAWA, 156 FEET EAST OF GRAVELED ROAD, 52.0 FEET SOUTH OF CENTERLINE OF PAVED ROAD, AND 3.8 FEET WEST OF A POWERLINE POLE. THE MARK IS 1.0 FT E FROM A WITNESS POST. THE MARK IS 3.0 FT BELOW ROAD.
8/15/1997 by USPSQD (MARK NOT FOUND)
RECOVERY NOTE BY US POWER SQUADRON 1997 MARK NOT FOUND.

Control Text

  • The horizontal coordinates were scaled from a topographic map and have an estimated accuracy of +/- 6 seconds.
  • The NAVD 88 height was computed by applying the VERTCON shift value to the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.) The vertical order pertains to the superseded datum.
  • The geoid height was determined by GEOID99.

Advertising with Us

Return to the Top of the Page