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Details for Benchmark: LC0685

N 40° 30.183 W 088° 59.017 (NAD 83)

Altitude: 774.09

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

Location:
In MCLEAN county, IL View Original Datasheet
Designation:
N 172
Marker Type:
bench mark disk
Setting:
light structures
Stability:
Mark of questionable or unknown stability.

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Got a picture this time. Tricky footing if ya don't want to fall in the creek about 10 feet below.

[Photos:]
photoLC0432 N 172

Also found it the second time back after suggestions here.

This was our first find ever! We had to clean it up a bit, but it was fun to finally have an entry in our geocaching diary!

it was a bit snowy and muddy today but we were able to locate it =)
this was our first benchmark find!

I risked my life getting to the waterside on the east side of the trail. Then, my wife yelled down that she saw it clear as day below the WEST side of the trail!

Found pretty easily in spite of not reading the description quite well enough to begin with.

Found this pretty quick after reading the descriptions and the other logs.

[Photos:]
photoN 172

Ludlads and I found this on the second try (after we went back to the web page and read the entry that said look on the west side).

N 40° 30.191 W 088° 59.032

This one was easy to find. It is next to a former railroad track that is now a bicycle trail. You can even see it from the trail!

GPSr points to the East side of the trail but it is located on the West side.

Marker was in good condition with only minor scratches on it.

Jeeperray

[last edit: 6/23/2003 1:03:01 PM PST]

[Photos:]
photoThe Marker

Documented History (by the NGS)

01/01/1954 by CGS (MONUMENTED)
01/01/1969 by NGS (GOOD)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1969 0.4 MI S FROM NORMAL. ABOUT 0.45 MILE SOUTH ALONG THE ILLINOIS CENTRAL RAILROAD FROM THE STATION AT NORMAL, OR ABOUT 0.65 MILE EAST ALONG E. WASHINGTON STREET FROM THE MCLEAN COUNTY COURTHOUSE AT BLOOMINGTON, THENCE 1.6 MILES NORTH ALONG THE ILLINOIS CENTRAL RAILROAD, 0.15 MILE NORTH OF A SIDETRACK WHICH LEADS EAST, 0.15 MILE SOUTH OF A CROSSING OF THE RAILROAD AND VERNON STREET, 25 FEET WEST OF THE WEST RAIL, SET IN THE TOP OF THE NORTH END OF THE WEST CONCRETE HEADWALL OF A DOUBLE-CHANNEL CONCRETE CULVERT, AND ABOUT 12 FEET BELOW THE LEVEL OF THE TRACK. SEC 28, T24N, R2E.

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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