MG0091 ***********************************************************************
MG0091  DESIGNATION -  R 52
MG0091  PID         -  MG0091
MG0091  STATE/COUNTY-  IL/ROCK ISLAND
MG0091  USGS QUAD   -  GREEN ROCK (1992)
MG0091
MG0091                         *CURRENT SURVEY CONTROL
MG0091  ___________________________________________________________________
MG0091* NAD 83(1986)-  41 29 19.     (N)    090 22 09.     (W)     SCALED
MG0091* NAVD 88     -       177.414  (meters)     582.07   (feet)  ADJUSTED
MG0091  ___________________________________________________________________
MG0091  GEOID HEIGHT-         -32.84  (meters)                     GEOID99
MG0091  DYNAMIC HT  -         177.346 (meters)     581.84  (feet)  COMP
MG0091  MODELED GRAV-     980,235.7   (mgal)                       NAVD 88
MG0091
MG0091  VERT ORDER  -  SECOND    CLASS 0
MG0091
MG0091.The horizontal coordinates were scaled from a topographic map and have
MG0091.an estimated accuracy of +/- 6 seconds.
MG0091
MG0091.The orthometric height was determined by differential leveling
MG0091.and adjusted by the National Geodetic Survey in June 1991.
MG0091
MG0091.The geoid height was determined by GEOID99.
MG0091
MG0091.The dynamic height is computed by dividing the NAVD 88
MG0091.geopotential number by the normal gravity value computed on the
MG0091.Geodetic Reference System of 1980 (GRS 80) ellipsoid at 45
MG0091.degrees latitude (g = 980.6199 gals.).
MG0091
MG0091.The modeled gravity was interpolated from observed gravity values.
MG0091
MG0091;                    North         East    Units  Estimated Accuracy
MG0091;SPC IL W     -   535,310.      683,090.      MT  (+/- 180 meters Scaled)
MG0091
MG0091                          SUPERSEDED SURVEY CONTROL
MG0091
MG0091  NGVD 29     -       177.493  (m)          582.33   (f) ADJ UNCH    2 0
MG0091
MG0091.Superseded values are not recommended for survey control.
MG0091.NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums.
MG0091.See file dsdata.txt to determine how the superseded data were derived.
MG0091
MG0091_MARKER: DB = BENCH MARK DISK
MG0091_SETTING: 30 = WALL
MG0091_STAMPING: R 52 1934
MG0091_STABILITY: D = MARK OF QUESTIONABLE OR UNKNOWN STABILITY
MG0091
MG0091  HISTORY     - Date     Condition        Recov. By
MG0091  HISTORY     - 1934     MONUMENTED       CGS
MG0091  HISTORY     - 19880509 MARK NOT FOUND   USPSQD
MG0091  HISTORY     - 19960816 MARK NOT FOUND   USPSQD
MG0091  HISTORY     - 19970605 MARK NOT FOUND   USPSQD
MG0091
MG0091                          STATION DESCRIPTION
MG0091
MG0091''DESCRIBED BY COAST AND GEODETIC SURVEY 1934
MG0091''1 MI NW FROM COLONA.
MG0091''IN ROCK ISLAND COUNTY, 1.0 MILE NORTHWEST ALONG THE CHICAGO
MG0091''ROCK ISLAND AND PACIFIC RAILWAY FROM THE STATION AT COLONA, HENRY
MG0091''COUNTY, AT THE ROCK RIVER BRIDGE, IN THE TOP OF THE SOUTHWEST
MG0091''END OF THE NORTHWEST CONCRETE BACKWALL, AND ONE FOOT LOWER
MG0091''THAN THE TRACK.  A STANDARD DISK, STAMPED R 52 1934.
MG0091
MG0091                          STATION RECOVERY (1988)
MG0091
MG0091''RECOVERY NOTE BY US POWER SQUADRON 1988 (JEB)
MG0091''MARK NOT FOUND.
MG0091
MG0091                          STATION RECOVERY (1996)
MG0091
MG0091''RECOVERY NOTE BY US POWER SQUADRON 1996
MG0091''MARK NOT FOUND.
MG0091
MG0091                          STATION RECOVERY (1997)
MG0091
MG0091''RECOVERY NOTE BY US POWER SQUADRON 1997
MG0091''MARK NOT FOUND.