JC0188 ***********************************************************************
JC0188  DESIGNATION -  A 311
JC0188  PID         -  JC0188
JC0188  STATE/COUNTY-  MO/C OF ST LOUIS
JC0188  USGS QUAD   -  CAHOKIA (1993)
JC0188
JC0188                         *CURRENT SURVEY CONTROL
JC0188  ___________________________________________________________________
JC0188* NAD 83(1986)-  38 37 25.     (N)    090 11 06.     (W)     SCALED
JC0188* NAVD 88     -       136.310  (meters)     447.21   (feet)  ADJUSTED
JC0188  ___________________________________________________________________
JC0188  GEOID HEIGHT-         -31.04  (meters)                     GEOID99
JC0188  DYNAMIC HT  -         136.224 (meters)     446.93  (feet)  COMP
JC0188  MODELED GRAV-     979,991.0   (mgal)                       NAVD 88
JC0188
JC0188  VERT ORDER  -  FIRST     CLASS I
JC0188
JC0188.The horizontal coordinates were scaled from a topographic map and have
JC0188.an estimated accuracy of +/- 6 seconds.
JC0188
JC0188.The orthometric height was determined by differential leveling
JC0188.and adjusted by the National Geodetic Survey in June 1991.
JC0188
JC0188.The geoid height was determined by GEOID99.
JC0188
JC0188.The dynamic height is computed by dividing the NAVD 88
JC0188.geopotential number by the normal gravity value computed on the
JC0188.Geodetic Reference System of 1980 (GRS 80) ellipsoid at 45
JC0188.degrees latitude (g = 980.6199 gals.).
JC0188
JC0188.The modeled gravity was interpolated from observed gravity values.
JC0188
JC0188;                    North         East    Units  Estimated Accuracy
JC0188;SPC MO E     -   309,700.      277,430.      MT  (+/- 180 meters Scaled)
JC0188
JC0188                          SUPERSEDED SURVEY CONTROL
JC0188
JC0188  NGVD 29     -       136.278  (m)          447.11   (f) ADJUSTED    1 1
JC0188
JC0188.Superseded values are not recommended for survey control.
JC0188.NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums.
JC0188.See file dsdata.txt to determine how the superseded data were derived.
JC0188
JC0188_MARKER: DB = BENCH MARK DISK
JC0188_SETTING: 30 = CULVERT
JC0188_STAMPING: A 311 1969
JC0188_STABILITY: D = MARK OF QUESTIONABLE OR UNKNOWN STABILITY
JC0188
JC0188  HISTORY     - Date     Condition        Recov. By
JC0188  HISTORY     - 1969     MONUMENTED       CGS
JC0188  HISTORY     - 1981     GOOD             NGS
JC0188  HISTORY     - 19910303 GOOD             USPSQD
JC0188
JC0188                          STATION DESCRIPTION
JC0188
JC0188''DESCRIBED BY COAST AND GEODETIC SURVEY 1969
JC0188''AT ST LOUIS.
JC0188''AT ST. LOUIS, ABOUT 0.35 MILE SOUTH ACROSS COUNTRY FROM THE
JC0188''WEST END OF THE EADS BRIDGE OVER THE MISSISSIPPI RIVER, ABOUT
JC0188''0.1 MILE EAST OF THE EAST END OF MARKET STREET, AT THE ST LOUIS
JC0188''GATEWAY ARCH, SET IN THE TOP OF THE EAST END OF THE CONCRETE
JC0188''HEAD WALL OF THE PEDESTRIAN SUBWAY WHICH LEADS FROM ONE LEG OF THE
JC0188''ARCH TO THE OTHER LEG, 75 FEET NORTH OF THE NORTH CORNER OF THE
JC0188''SOUTH LEG OF THE ARCH, ABOUT 45 FEET SOUTH OF THE EXTENDED CENTER
JC0188''LINE OF MARKET STREET AND 1 1/2 FEET ABOVE THE LEVEL OF THE
JC0188''GROUND.
JC0188
JC0188                          STATION RECOVERY (1981)
JC0188
JC0188''RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1981
JC0188''IN ST LOUIS, 0.55 KILOMETERS (0.35 MILE) SOUTH ACROSS COUNTRY FROM THE
JC0188''WEST END OF THE EADS BRIDGE OVER THE MISSISSIPPI RIVER, 0.16 KILOMETER
JC0188''(0.1 MILE) EAST OF THE EAST END OF MARKET STREET, AT THE ST LOUIS
JC0188''GATEWAY ARCH, IN THE TOP OF THE EAST END OF THE CONCRETE HEADWALL OO
JC0188''THE PEDSTRAIN SUBWAY WHICH LEADS FROM ONE LEG OF THE ARCH TO THE OTHER
JC0188''LEG, 22.86 METERS (75.0 FEET) NORTH OF THE NORTH CORNER OF THE SOUTH
JC0188''LEG OF THE ARCH, AND 13.72 METERS (45.0 FEET) SOUTH OF THE EXTENDED
JC0188''CENTER LINE OF MARKET STREET.
JC0188''THE MARK IS 0.5 M ABOVE GROUND.
JC0188
JC0188                          STATION RECOVERY (1991)
JC0188
JC0188''RECOVERY NOTE BY US POWER SQUADRON 1991 (JNS)
JC0188''RECOVERED IN GOOD CONDITION.