MG0018 ***********************************************************************
MG0018  DESIGNATION -  T 52
MG0018  PID         -  MG0018
MG0018  STATE/COUNTY-  IL/ROCK ISLAND
MG0018  USGS QUAD   -  SILVIS (1991)
MG0018
MG0018                         *CURRENT SURVEY CONTROL
MG0018  ___________________________________________________________________
MG0018* NAD 83(1986)-  41 30 47.     (N)    090 24 49.     (W)     SCALED
MG0018* NAVD 88     -       179.502  (meters)     588.92   (feet)  ADJUSTED
MG0018  ___________________________________________________________________
MG0018  GEOID HEIGHT-         -32.82  (meters)                     GEOID99
MG0018  DYNAMIC HT  -         179.434 (meters)     588.69  (feet)  COMP
MG0018  MODELED GRAV-     980,240.2   (mgal)                       NAVD 88
MG0018
MG0018  VERT ORDER  -  SECOND    CLASS 0
MG0018
MG0018.The horizontal coordinates were scaled from a topographic map and have
MG0018.an estimated accuracy of +/- 6 seconds.
MG0018
MG0018.The orthometric height was determined by differential leveling
MG0018.and adjusted by the National Geodetic Survey in June 1991.
MG0018
MG0018.The geoid height was determined by GEOID99.
MG0018
MG0018.The dynamic height is computed by dividing the NAVD 88
MG0018.geopotential number by the normal gravity value computed on the
MG0018.Geodetic Reference System of 1980 (GRS 80) ellipsoid at 45
MG0018.degrees latitude (g = 980.6199 gals.).
MG0018
MG0018.The modeled gravity was interpolated from observed gravity values.
MG0018
MG0018;                    North         East    Units  Estimated Accuracy
MG0018;SPC IL W     -   538,030.      679,390.      MT  (+/- 180 meters Scaled)
MG0018
MG0018                          SUPERSEDED SURVEY CONTROL
MG0018
MG0018  NGVD 29     -       179.578  (m)          589.17   (f) ADJ UNCH    2 0
MG0018
MG0018.Superseded values are not recommended for survey control.
MG0018.NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums.
MG0018.See file dsdata.txt to determine how the superseded data were derived.
MG0018
MG0018_MARKER: DB = BENCH MARK DISK
MG0018_SETTING: 7 = SET IN TOP OF CONCRETE MONUMENT
MG0018_STAMPING: T 52 1934
MG0018_STABILITY: C = MAY HOLD, BUT OF TYPE COMMONLY SUBJECT TO
MG0018+STABILITY: SURFACE MOTION
MG0018
MG0018  HISTORY     - Date     Condition        Recov. By
MG0018  HISTORY     - 1934     MONUMENTED       CGS
MG0018  HISTORY     - 19880119 MARK NOT FOUND   USPSQD
MG0018  HISTORY     - 19960816 MARK NOT FOUND   USPSQD
MG0018
MG0018                          STATION DESCRIPTION
MG0018
MG0018''DESCRIBED BY COAST AND GEODETIC SURVEY 1934
MG0018''AT SILVIS.
MG0018''AT SILVIS, ROCK ISLAND COUNTY, ON THE CHICAGO, ROCK ISLAND
MG0018''AND PACIFIC RAILWAY, 67 YARDS EAST OF THE STATION, 45 FEET
MG0018''SOUTH OF THE CENTERLINE OF THE SOUTH MAIN TRACK, AND 4 FEET
MG0018''NORTHEAST OF A POLE.  A STANDARD DISK, STAMPED T 52 1934 AND
MG0018''SET IN THE TOP OF A CONCRETE POST.
MG0018
MG0018                          STATION RECOVERY (1988)
MG0018
MG0018''RECOVERY NOTE BY US POWER SQUADRON 1988 (JEB)
MG0018''MARK NOT FOUND.
MG0018
MG0018                          STATION RECOVERY (1996)
MG0018
MG0018''RECOVERY NOTE BY US POWER SQUADRON 1996
MG0018''MARK NOT FOUND.