MG0090 ***********************************************************************
MG0090  DESIGNATION -  59.5 A
MG0090  PID         -  MG0090
MG0090  STATE/COUNTY-  IL/HENRY
MG0090  USGS QUAD   -  GREEN ROCK (1992)
MG0090
MG0090                         *CURRENT SURVEY CONTROL
MG0090  ___________________________________________________________________
MG0090* NAD 83(1986)-  41 28 49.     (N)    090 20 54.     (W)     SCALED
MG0090* NAVD 88     -       174.532  (meters)     572.61   (feet)  ADJUSTED
MG0090  ___________________________________________________________________
MG0090  GEOID HEIGHT-         -32.84  (meters)                     GEOID99
MG0090  DYNAMIC HT  -         174.465 (meters)     572.39  (feet)  COMP
MG0090  MODELED GRAV-     980,233.2   (mgal)                       NAVD 88
MG0090
MG0090  VERT ORDER  -  SECOND    CLASS 0
MG0090
MG0090.The horizontal coordinates were scaled from a topographic map and have
MG0090.an estimated accuracy of +/- 6 seconds.
MG0090
MG0090.The orthometric height was determined by differential leveling
MG0090.and adjusted by the National Geodetic Survey in June 1991.
MG0090
MG0090.The geoid height was determined by GEOID99.
MG0090
MG0090.The dynamic height is computed by dividing the NAVD 88
MG0090.geopotential number by the normal gravity value computed on the
MG0090.Geodetic Reference System of 1980 (GRS 80) ellipsoid at 45
MG0090.degrees latitude (g = 980.6199 gals.).
MG0090
MG0090.The modeled gravity was interpolated from observed gravity values.
MG0090
MG0090;                    North         East    Units  Estimated Accuracy
MG0090;SPC IL W     -   534,380.      684,830.      MT  (+/- 180 meters Scaled)
MG0090
MG0090                          SUPERSEDED SURVEY CONTROL
MG0090
MG0090  NGVD 29     -       174.611  (m)          572.87   (f) ADJ UNCH    2 0
MG0090
MG0090.Superseded values are not recommended for survey control.
MG0090.NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums.
MG0090.See file dsdata.txt to determine how the superseded data were derived.
MG0090
MG0090_MARKER: DD = SURVEY DISK
MG0090_SETTING: 30 = WALL
MG0090_STAMPING: ILL MISS CANAL 59.5A
MG0090_STABILITY: D = MARK OF QUESTIONABLE OR UNKNOWN STABILITY
MG0090
MG0090  HISTORY     - Date     Condition        Recov. By
MG0090  HISTORY     - UNK      MONUMENTED       IRC
MG0090  HISTORY     - 1935     GOOD             NGS
MG0090  HISTORY     - 19960717 MARK NOT FOUND   USPSQD
MG0090
MG0090                          STATION DESCRIPTION
MG0090
MG0090''DESCRIBED BY NATIONAL GEODETIC SURVEY 1935
MG0090''AT COLONA.
MG0090''AT COLONA, HENRY COUNTY, ON THE CHICAGO, ROCK ISLAND AND
MG0090''PACIFIC RAILWAY, 10 POLES EAST OF THE STATION, 100 FEET
MG0090''NORTHEAST OF A BRIDGE, AT ILLINOIS-MISSISSIPPI CANAL LOCK 28,
MG0090''AND IN THE TOP OF THE SOUTHWEST END OF THE SOUTHEAST WALL.  A
MG0090''DISK, STAMPED ILL MISS CANAL 59.5A.
MG0090
MG0090                          STATION RECOVERY (1996)
MG0090
MG0090''RECOVERY NOTE BY US POWER SQUADRON 1996
MG0090''MARK NOT FOUND.