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Details for Benchmark: LC0480

N 40° 13.277 W 088° 57.750 (NAD 83)

Altitude: 746.25

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

Location:
In DE WITT county, IL View Original Datasheet
Designation:
WAPELLA ECC
Marker Type:
triangulation station disk
Setting:
set into the top of a round concrete monument
Stability:
May hold, but of type commonly subject to surface motion.

Reference Points

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This one is still there and easy to find.

[Photos:]
photoLC0480

Tound this one on second visit to area.

[This entry was edited by wvhillbilly59 on Monday, March 26, 2007 at 4:43:03 PM.]

[Photos:]
photoLC0480
Wapella, IL

Documented History (by the NGS)

01/01/1934 by CGS (MONUMENTED)
DESCRIBED BY COAST AND GEODETIC SURVEY 1934 (CAS) STATION IS ABOUT 5 MILES N OF CLINTON, IN THE TOWN OF WAPELLA, ON THE ILLINOIS CENTRAL RR RIGHT-OF-WAY, 32 FEET E OF THE E RAIL OF THE MAIN TRACK, 55 FEET W OF A 30-INCH ELM, 57 FEET WSW OF A 20-INCH ELM, 153 FEET N OF THE N END OF THE WAPELLA RR STATION, AND PROJECTS 8 INCHES. SURFACE, UNDERGROUND, REFERENCE AND AZIMUTH MARKS ARE STANDARD BRONZE DISKS SET IN CONCRETE. REFERENCE MARK NO. 1 (1934) IS 116.84 FEET NE OF STATION, 15 FEET S OF A 24-INCH MAPLE, 25 FEET W OF CENTER LINE OF STREET, AND PROJECTS 8 INCHES. REFERENCE MARK NO. 2 (1934) IS 139.50 FEET SSE OF STATION, 11 FEET S OF 36-INCH COTTONWOOD TREE, 23 FEET ENE OF 36-INCH ELM, 27 FEET W OF CENTER LINE OF STREET, 206.67 FEET S OF REFERENCE MARK NO. 1, AND 103.65 FEET NNE OF REFERENCE MARK (1920). AZIMUTH MARK IS ABOUT 0.3 MILE N OF STATION, 29 FEET E OF THE E RAIL OF THE MAIN TRACK OF THE ILLINOIS CENTRAL RR, 32 FEET S OF CENTER LINE OF E-W ROAD, AND PROJECTS 6 INCHES. WAPELLA (1920) IS 221.74 FEET S OF STATION, EMBEDDED IN THE CONCRETE SIDEWALK, 2.62 FEET S OF ITS N EDGE, AND 6.46 FEET E OF THE E AND NEAREST RAIL. IT IS A STANDARD U.S.C. AND G.S. TRIANGULATION-STATION MARKER EMBEDDED FLUSH INTO THE CONCRETE WALK. R.M. (1920) IS 220.00 FEET SSE OF STATION, 56.80 FEET ENE OF WAPELLA (1920), 11 FEET N OF A TRANSMISSION POLE, 3.5 FEET N OF N EDGE OF SIDEWALK, AND PROJECTS 2 INCHES. HEIGHT OF LIGHT ABOVE STATION MARK - 113 FEET.
01/01/1969 by CGS (GOOD)
RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1969 (JGC) THE STATION MARK, STAMPED WAPELLA ECC 1934 IS ABOUT 4.7 MILES NORTH ALONG THE ILLINOIS CENTRAL RAILROAD FROM THE STATION AT CLINTON, 138 YARDS NORTHWEST OF THE NORTHWEST CORNER OF THE POST OFFICE AT WAPELLA, 6-1/2 RAILS NORTH OF THE CENTER OF A CROSSING OF THE RAILROAD AND MAIN STREET, 265 FEET SOUTH OF MILEPOST 778, 100 FEET WEST OF THE CENTER LINE OF A PAVED STREET, 30 FEET EAST OF THE EAST RAIL OF THE MAIN TRACK, 139.50 FEET NORTHWEST OF R.M. 2, 116.84 FEET SOUTHWEST OF R.M. 1, 221.74 FEET NORTH OF WAPELLA 1920, 220.00 FEET NORTHWEST OF R.M. WAPELLA, 1.5 FEET WEST OF A METAL WITNESS POST, ABOUT 1-1/2 FEET BELOW THE LEVEL OF THE TRACK, AND SET IN THE TOP OF A CONCRETE POST WHICH PROJECTS 5 INCHES ABOVE THE SURFACE OF THE GROUND. R.M. 1, STAMPED WAPELLA ECC NO 1 1934 IS 116.84 FEET NORTHEAST OF THE STATION MARK, 0.05 MILE NORTH OF THE POST OFFICE AT WAPELLA, 345 FEET NORTH OF THE CENTER LINE OF MAIN STREET, 200 FEET SOUTHEAST OF MILEPOST 778, 105 FEET EAST OF THE EAST RAIL OF THE MAIN TRACK, 26-1/2 FEET WEST OF THE CENTER LINE OF A PAVED STREET, 2.0 FEET NORTH OF A METAL WITNESS POST, ABOUT 2-1/2 FEET BELOW THE LEVEL OF THE TRACK, AND SET IN THE TOP OF A CONCRETE POST WHICH PROJECTS 6 INCHES. R.M. 2, STAMPED WAPELLA ECC NO 2 1934 IS 139.50 FEET SOUTHEAST OF THE STATION MARK, 92 YARDS NORTHWEST AND ACROSS MAIN STREET FROM THE NORTHWEST CORNER OF THE POST OFFICE AT WAPELLA, 138 FEET NORTH OF THE CENTER LINE OF THE STREET, 107 FEET EAST OF THE EAST RAIL OF THE MAIN TRACK, 22 FEET WEST OF THE CENTER LINE OF A PAVED STREET, 110-1/2 FEET NORTH OF A FIRE HYDRANT, 10 FEET SOUTH OF A 36-INCH COTTONWOOD TREE, ABOUT 2 FEET ABOVE THE LEVEL OF THE TRACK, ABOUT 1 FOOT BELOW THE LEVEL OF THE PAVED STREET, AND SET IN THE TOP OF A CONCRETE POST WHICH PROJECTS 4 INCHES ABOVE THE SURFACE OF THE GROUND. THE AZIMUTH MARK, STAMPED WAPELLA ECC AZIMUTH 1934 IS 0.3 MILE NORTH ALONG THE ILLINOIS CENTRAL RAILROAD FROM THE STATION MARK, 0.25 MILE NORTH OF MILEPOST 778, 46 FEET SOUTHEAST OF THE CENTER OF A CROSSING OF THE RAILROAD AND A PAVED ROAD, 30 FEET EAST OF THE EAST RAIL, 33-1/2 FEET SOUTH OF THE CENTER LINE OF THE ROAD, 82-1/2 FEET NORTH-NORTHWEST OF A TELEPHONE POLE, 1.4 FEET NORTH OF A METAL WITNESS POST, ABOUT 1 FOOT BELOW THE LEEL OF THE TRACK, AND SET IN THE TOP OF A CONCRETE POST WHICH PROJECTS 4 INCHES ABOVE THE SURFACE OF THE GROUND. AIRLINE DISTANCE AND DIRECTION FROM NEAREST TOWN--4.7 MILES NORTH
01/01/1969 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1969 4.7 MI N FROM CLINTON. ABOUT 4.7 MILES NORTH ALONG THE ILLINOIS CENTRAL RAILROAD FROM THE STATION AT CLINTON, 138 YARDS NORTHWEST OF THE NORTHWEST CORNER OF THE POST OFFICE AT WAPELLA, 6 1/2 RAILS NORTH OF THE CENTER OF A CROSSING OF THE RAILROAD AND MAIN STREET, 265 FEET SOUTH OF MILEPOST 778, 100 FEET WEST OF THE CENTER LINE OF A PAVED STREET, 30 FEET EAST OF THE EAST RAIL OF THE MAIN TRACK, 139.50 FEET NORTHWEST OF WAPELLA RM 2 ECC, 116.84 FEET SOUTHWEST OF WAPELLA RM 1 ECC, 221.74 FEET NORTH OF WAPELLA 1920, 220.00 FEET NORTHWEST OF RM WAPELLA, 1.5 FEET WEST OF A METAL WITNESS POST, ABOUT 1 1/2 FEET BELOW THE LEVEL OF THE TRACK, AND SET IN THE TOP OF A CONCRETE POST WHICH PROJECTS 5 INCHES ABOVE THE SURFACE OF THE GROUND. SEC 3, T 20N, R 2E
01/01/1973 by ILDT (GOOD)
RECOVERY NOTE BY ILLINOIS DEPARTMENT OF TRANSPORTATION 1973 (LEM) WAPELLA EU 1934-(AZIMUTH MARK) GOOD WAPELLA ECC 1934-GOOD WAPELLA NO. 1 1934-GOOD WAPELLA ECC NO 2 1934-GOOD
01/01/1976 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1976 (LHW) WAPELLA ECC, REFERENCE MARKS 1 AND 2 AND AZIMUTH MARK WERE RECOVERED AND FOUND TO BE IN GOOD CONDITION. THE STATION MARK AND REFERENCE MARK 1 HAVE BEEN CHIPPED BUT APPEAR TO BE SOLID. THE STATION MARK IS 65 FEET NORTHWEST OF A TELEPHONE POLE, 61 FEET SOUTHWEST OF A TELEPHONE POLE, 30 FEET EAST OF THE EAST RAIL OF THE TRACKS AND PROJECTS 8 INCHES. REFERENCE MARK 1 IS 105 FEET EAST OF THE EAST RAIL OF THE TRACK, 72 FEET SOUTH OF THE SOUTHEAST CORNER OF A BRICK SCALE HOUSE, 25 FEET WEST OF THE CENTER OF OAK STREET AND 1.5 FEET NORTH OF A WITNESS POST. IT PROJECTS 6 INCHES. REFERENCE MARK 2 IS 78 FEET NORTHWEST OF A TELEPHONE POLE, 24 FEET WEST OF THE CENTER OF OAK STREET, 10 FEET SOUTH OF A 48 INCH COTTONWOOD TREE AND 2 FEET NORTH OF A WITNESS POST. IT PROJECTS 2 INCHES. STATION IS ON THE NORTH SIDE OF THE MAIN STREET IN WAPELLA. STATION WAPELLA 1920 AND REFERENCE MARK 1920 WERE NOT RECOVERED. THE SIDEWALK HAS BEEN REMOVED WHERE THE STATION WAS. AIRLINE DISTANCE AND DIRECTION FROM NEAREST TOWN--AT WAPELLA.
01/01/1976 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1976 RECOVERED IN GOOD CONDITION.
04/19/1997 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1997 (RKB) THE STATION IS LOCATED IN WAPELLA, IN AN OPEN RECTANGULAR FIELD FORMED BY RAILROAD TRACKS, NORTH FIRST STREET, MAIN STREET, AND OAK STREET. TO REACH FROM THE INTERSECTION OF THE NORTHBOUND LANES OF U.S. HIGHWAY 51 (WALNUT STREET) AND NORTH FIRST STREET, WHICH IS THE FIRST STREET SOUTH OF THE GRAIN ELEVATOR IN WAPELLA, GO EAST ON NORTH FIRST STREET FOR 0.1 MI (0.2 KM) TO A DOUBLE SET OF RAILROAD TRACKS. TURN RIGHT, SOUTH, ONTO TRACK ROAD ALONG EAST SIDE OF TRACKS, IMMEDIATELY AFTER CROSSING TRACKS, FOR 62 M (203.4 FT) TO THE STATION ON THE LEFT. IT IS 9.0 M (29.5 FT) EAST OF THE EAST RAIL OF THE EAST SET OF TRACKS, 30.6 M (100.4 FT) WEST OF THE CENTER OF OAK STREET, 62.0 M (203.4 FT) SOUTH OF THE CENTER OF NORTH FIRST STREET, 77.5 M (254.3 FT) NORTH OF THE CENTER OF MAIN STREET, AT A SHORT METAL WITNESS POST, AND 0.3 M (1.0 FT) EAST OF A FIBERGLASS WITNESS POST.

Control Text

  • The horizontal coordinates were established by GPS observations and adjusted by the National Geodetic Survey in July 1998.
  • The orthometric height was determined by differential leveling and adjusted by the National Geodetic Survey in June 1991. WARNING-Repeat measurements at this control monument indicate possible vertical movement.
  • The X, Y, and Z were computed from the position and the ellipsoidal ht.
  • The Laplace correction was computed from DEFLEC99 derived deflections.
  • The ellipsoidal height was determined by GPS observations and is referenced to NAD 83.
  • 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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