JC1164 ***********************************************************************
JC1164  DESIGNATION -  5 LOCK 27 RM
JC1164  PID         -  JC1164
JC1164  STATE/COUNTY-  IL/MADISON
JC1164  USGS QUAD   -  GRANITE CITY (1998)
JC1164
JC1164                         *CURRENT SURVEY CONTROL
JC1164  ___________________________________________________________________
JC1164* NAD 83(1986)-  38 42 06.     (N)    090 10 53.     (W)     SCALED
JC1164* NAVD 88     -       131.534  (meters)     431.54   (feet)  ADJUSTED
JC1164  ___________________________________________________________________
JC1164  GEOID HEIGHT-         -31.22  (meters)                     GEOID99
JC1164  DYNAMIC HT  -         131.451 (meters)     431.27  (feet)  COMP
JC1164  MODELED GRAV-     979,992.9   (mgal)                       NAVD 88
JC1164
JC1164  VERT ORDER  -  FIRST     CLASS II
JC1164
JC1164.The horizontal coordinates were scaled from a topographic map and have
JC1164.an estimated accuracy of +/- 6 seconds.
JC1164
JC1164.The orthometric height was determined by differential leveling
JC1164.and adjusted by the National Geodetic Survey in June 1991.
JC1164
JC1164.The geoid height was determined by GEOID99.
JC1164
JC1164.The dynamic height is computed by dividing the NAVD 88
JC1164.geopotential number by the normal gravity value computed on the
JC1164.Geodetic Reference System of 1980 (GRS 80) ellipsoid at 45
JC1164.degrees latitude (g = 980.6199 gals.).
JC1164
JC1164.The modeled gravity was interpolated from observed gravity values.
JC1164
JC1164;                    North         East    Units  Estimated Accuracy
JC1164;SPC IL W     -   225,850.      698,720.      MT  (+/- 180 meters Scaled)
JC1164
JC1164                          SUPERSEDED SURVEY CONTROL
JC1164
JC1164  NGVD 29     -       131.500  (m)          431.43   (f) ADJUSTED    1 2
JC1164
JC1164.Superseded values are not recommended for survey control.
JC1164.NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums.
JC1164.See file dsdata.txt to determine how the superseded data were derived.
JC1164
JC1164_MARKER: DD = SURVEY DISK
JC1164_SETTING: 40 = MASSIVE CONCRETE
JC1164_STAMPING: RM 5
JC1164_STABILITY: A = MOST RELIABLE AND EXPECTED TO HOLD
JC1164+STABILITY: POSITION/ELEVATION WELL
JC1164
JC1164  HISTORY     - Date     Condition        Recov. By
JC1164  HISTORY     - UNK      MONUMENTED       DOD
JC1164  HISTORY     - 1981     GOOD             NGS
JC1164
JC1164                          STATION DESCRIPTION
JC1164
JC1164''DESCRIBED BY NATIONAL GEODETIC SURVEY 1981
JC1164''IN GRANITE CITY.
JC1164''IN GRANITE CITY, AT THE U.S. ARMY CORPS ENGINEERS LOCK NUMBER 27, NEAR
JC1164''THE ENTER OF THE INTERMEDIATE NEAR THE NORTHEAST CORNER OF A CONTROL
JC1164''BUILDING, BETWEEN THE TWO LOCK CHANNELS, 8.23 METERS (27.0 FEET)
JC1164''NORTHEAST OF THE EAST CORNER OF A CONTROL BUILDING, 1.12 METERS (3.7
JC1164''FEET) NORTHWEST OF THE NORTHWEST EDGE OF THE SOUTHEAST LOCK CHANNEL.
JC1164''THE MARK IS ABOVE LEVEL WITH TOP OF LOCK.