ME2893 ***********************************************************************
ME2893  DESIGNATION -  AVALON
ME2893  PID         -  ME2893
ME2893  STATE/COUNTY-  IL/COOK
ME2893  USGS QUAD   -  LAKE CALUMET (1997)
ME2893
ME2893                         *CURRENT SURVEY CONTROL
ME2893  ___________________________________________________________________
ME2893* NAD 83(1997)-  41 44 35.05388(N)    087 35 38.75931(W)     ADJUSTED
ME2893* NAVD 88     -       179.054  (meters)     587.45   (feet)  ADJUSTED
ME2893  ___________________________________________________________________
ME2893  LAPLACE CORR-          -0.73  (seconds)                    DEFLEC99
ME2893  GEOID HEIGHT-         -33.41  (meters)                     GEOID99
ME2893  DYNAMIC HT  -         178.991 (meters)     587.24  (feet)  COMP
ME2893  MODELED GRAV-     980,268.5   (mgal)                       NAVD 88
ME2893
ME2893  HORZ ORDER  -  FIRST
ME2893  VERT ORDER  -  FIRST     CLASS II
ME2893
ME2893.The horizontal coordinates were established by classical geodetic methods
ME2893.and adjusted by the National Geodetic Survey in October 1999.
ME2893
ME2893.The orthometric height was determined by differential leveling
ME2893.and adjusted by the National Geodetic Survey in April 1995.
ME2893
ME2893.The Laplace correction was computed from DEFLEC99 derived deflections.
ME2893
ME2893.The geoid height was determined by GEOID99.
ME2893
ME2893.The dynamic height is computed by dividing the NAVD 88
ME2893.geopotential number by the normal gravity value computed on the
ME2893.Geodetic Reference System of 1980 (GRS 80) ellipsoid at 45
ME2893.degrees latitude (g = 980.6199 gals.).
ME2893
ME2893.The modeled gravity was interpolated from observed gravity values.
ME2893
ME2893;                    North         East     Units   Scale      Converg.
ME2893;SPC IL E     -   563,830.074   361,490.474   MT  1.00002151 +0 29 31.9
ME2893;UTM  16      - 4,621,420.800   450,600.539   MT  0.99963003 -0 23 44.0
ME2893
ME2893:                Primary Azimuth Mark                     Grid Az
ME2893:SPC IL E     -  PAVIA                                    068 37 38.9
ME2893:UTM  16      -  PAVIA                                    069 30 54.8
ME2893
ME2893|---------------------------------------------------------------------|
ME2893| PID    Reference Object                     Distance      Geod. Az  |
ME2893|                                                           dddmmss.s |
ME2893| ME2669 PAVIA                               APPROX. 4.6 KM 0690710.8 |
ME2893| ME3352 AVALON RM 1                          27.350 METERS 26523     |
ME2893| ME3351 AVALON RM 2                          29.333 METERS 34956     |
ME2893|---------------------------------------------------------------------|
ME2893
ME2893                          SUPERSEDED SURVEY CONTROL
ME2893
ME2893  NAD 83(1997)-  41 44 35.05405(N)    087 35 38.75953(W) AD(       ) 1
ME2893  NAD 83(1997)-  41 44 35.05888(N)    087 35 38.76874(W) AD(       ) 1
ME2893  NAD 83(1986)-  41 44 35.05915(N)    087 35 38.76821(W) AD(       ) 1
ME2893  NAD 27      -  41 44 34.93387(N)    087 35 38.59878(W) AD(       ) 1
ME2893  NGVD 29     -       179.160  (m)          587.79   (f) ADJUSTED    1 2
ME2893
ME2893.Superseded values are not recommended for survey control.
ME2893.NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums.
ME2893.See file dsdata.txt to determine how the superseded data were derived.
ME2893
ME2893_MARKER: DS = TRIANGULATION STATION DISK
ME2893_SETTING: 7 = SET IN TOP OF CONCRETE MONUMENT
ME2893_STAMPING: AVALON 1977
ME2893_MAGNETIC: N = NO MAGNETIC MATERIAL
ME2893_STABILITY: C = MAY HOLD, BUT OF TYPE COMMONLY SUBJECT TO
ME2893+STABILITY: SURFACE MOTION
ME2893_SATELLITE: THE SITE LOCATION WAS REPORTED AS SUITABLE FOR
ME2893+SATELLITE: SATELLITE OBSERVATIONS - August 06, 1992
ME2893
ME2893  HISTORY     - Date     Condition        Recov. By
ME2893  HISTORY     - 1977     MONUMENTED       NGS
ME2893  HISTORY     - 1977     GOOD             NGS
ME2893  HISTORY     - 19920806 GOOD             NGS
ME2893
ME2893                          STATION DESCRIPTION
ME2893
ME2893''DESCRIBED BY NATIONAL GEODETIC SURVEY 1977 (JLO)
ME2893''THE STATION IS LOCATED IN THE SOUTH EDGE OF CHICAGO, IN THE
ME2893''NORTH SECTION OF AVALON CITY PARK, ABOUT 300 FEET SOUTH OF
ME2893''THE INTERSECTION OF EAST 83RD STREET AND SOUTH AVALON AVENUE.
ME2893''ADDRESS 1231 EAST 83RD STREET.
ME2893''
ME2893''STATION MARKS, STAMPED---AVALON 1977---, ARE STANDARD DISKS.
ME2893''THE SURFACE DISK IS SET IN THE TOP OF A 12-INCH CYLINDRICAL
ME2893''CONCRETE MONUMENT THAT IS 3 INCHES BELOW A CAST IRON COVER
ME2893''WITH THE LETTERING, NATIONAL GEODETIC SURVEY.
ME2893''IT IS 66 FEET NORTHWEST OF THE
ME2893''NORTHEAST CORNER OF A FENCE AROUND THE SWIMMING POOL AND
ME2893''30 FEET SOUTHEAST OF A LIGHT POLE NUMBER W3. THE UNDERGROUND
ME2893''DISK IS SET IN THE TOP OF AN IRREGULAR MASS OF CONCRETE 42
ME2893''INCHES BELOW THE GROUND SURFACE.
ME2893''
ME2893''REFERENCE MARK 1, STAMPED---AVALON NO 1 1977---, IS A STANDARD
ME2893''DISK SET IN THE TOP OF A 12-INCH CYLINDRICAL CONCRETE
ME2893''MONUMENT THAT IS FLUSH WITH THE GROUND SURFACE. IT IS 38
ME2893''FEET NORTH OF THE NORTHWEST CORNER OF THE FENCE AROUND THE
ME2893''SWIMMING POOL AND 30 FEET EAST OF A 16-INCH OAK TREE.
ME2893''
ME2893''REFERENCE MARK 2, STAMPED---AVALON NO 2 1977---, IS A STANDARD
ME2893''DISK, SET IN THE TOP OF A 12-INCH CYLINDRICAL CONCRETE
ME2893''MONUMENT THAT IS 1 INCH BELOW THE GROUND SURFACE. IT IS 59
ME2893''FEET SOUTHWEST OF THE SOUTHEAST CORNER OF THE PARK BUILDING
ME2893''AND 16 FEET NORTHEAST OF A CONCRETE BUILDING.
ME2893''
ME2893''NO SUITABLE PLACE TO ESTABLISH AN AZIMUTH MARK.
ME2893''
ME2893''NO MEASUREMENT BETWEEN THE REFERENCE MARKS DUE TO THE CONCRETE
ME2893''BUILDING ON LINE.
ME2893''
ME2893''HEIGHT OF LIGHT ABOVE THE STATION MARK WAS 30.6 METERS.
ME2893
ME2893                          STATION RECOVERY (1977)
ME2893
ME2893''RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1977
ME2893''RECOVERED IN GOOD CONDITION.
ME2893
ME2893                          STATION RECOVERY (1992)
ME2893
ME2893''RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1992
ME2893''IN CHICAGO, AT 1215 EAST 83RD STREET, 29.5 M (96.8 FT) SOUTH OF
ME2893''REFERENCE MARK 2, 27.3 M (89.6 FT) EAST OF REFERENCE MARK 1, 20.1 M
ME2893''(65.9 FT) NORTHWEST OF THE NORTHEAST CORNER OF A CHAIN-LINK FENCE
ME2893''ENCLOSING THE AVALON CITY PARK SWIMMING POOL AT 1215 EAST 83RD
ME2893''STREET, 13.2 M (43.3 FT) NORTH OF A FENCE, 5.3 M (17.4 FT) EAST OF
ME2893''THE EAST EDGE OF A BASKETBALL COURT, AND THE MONUMENT IS RECESSED 0.1
ME2893''M (0.3 FT) BELOW THE GROUND SURFACE.  NOTE--ACCESS TO THE MONUMENT IS
ME2893''THROUGH A 6-INCH SQUARE METAL COVER INSCRIBED NATIONAL GEODETIC
ME2893''SURVEY.