ME1851 ***********************************************************************
ME1851  DESIGNATION -  P 137
ME1851  PID         -  ME1851
ME1851  STATE/COUNTY-  IL/COOK
ME1851  USGS QUAD   -  PALOS PARK (1997)
ME1851
ME1851                         *CURRENT SURVEY CONTROL
ME1851  ___________________________________________________________________
ME1851* NAD 83(1986)-  41 40 49.     (N)    087 49 19.     (W)     SCALED
ME1851* NAVD 88     -       180.718  (meters)     592.91   (feet)  ADJUSTED
ME1851  ___________________________________________________________________
ME1851  GEOID HEIGHT-         -33.26  (meters)                     GEOID99
ME1851  DYNAMIC HT  -         180.652 (meters)     592.69  (feet)  COMP
ME1851  MODELED GRAV-     980,253.4   (mgal)                       NAVD 88
ME1851
ME1851  VERT ORDER  -  FIRST     CLASS II
ME1851
ME1851.The horizontal coordinates were scaled from a topographic map and have
ME1851.an estimated accuracy of +/- 6 seconds.
ME1851
ME1851.The orthometric height was determined by differential leveling
ME1851.and adjusted by the National Geodetic Survey in June 1991.
ME1851
ME1851.The geoid height was determined by GEOID99.
ME1851
ME1851.The dynamic height is computed by dividing the NAVD 88
ME1851.geopotential number by the normal gravity value computed on the
ME1851.Geodetic Reference System of 1980 (GRS 80) ellipsoid at 45
ME1851.degrees latitude (g = 980.6199 gals.).
ME1851
ME1851.The modeled gravity was interpolated from observed gravity values.
ME1851
ME1851;                    North         East    Units  Estimated Accuracy
ME1851;SPC IL E     -   556,720.      342,580.      MT  (+/- 180 meters Scaled)
ME1851
ME1851                          SUPERSEDED SURVEY CONTROL
ME1851
ME1851  NGVD 29     -       180.811  (m)          593.21   (f) ADJ UNCH    1 2
ME1851
ME1851.Superseded values are not recommended for survey control.
ME1851.NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums.
ME1851.See file dsdata.txt to determine how the superseded data were derived.
ME1851
ME1851_MARKER: DB = BENCH MARK DISK
ME1851_SETTING: 30 = CULVERT
ME1851_STAMPING: P 137 1947
ME1851_STABILITY: D = MARK OF QUESTIONABLE OR UNKNOWN STABILITY
ME1851
ME1851  HISTORY     - Date     Condition        Recov. By
ME1851  HISTORY     - 1947     MONUMENTED       CGS
ME1851  HISTORY     - 1971     GOOD             NGS
ME1851  HISTORY     - 1977     GOOD             NGS
ME1851
ME1851                          STATION DESCRIPTION
ME1851
ME1851''DESCRIBED BY COAST AND GEODETIC SURVEY 1947
ME1851''8 MI NW FROM BLUE ISLAND.
ME1851''ABOUT 8.05 MILES NORTHWEST ALONG STATE HIGHWAY 83 FROM THE GRAND
ME1851''TRUNK AND WESTERN RAILROAD STATION AT BLUE ISLAND, ABOUT 0.5 MILE
ME1851''EAST OF THE INTERSECTION OF 86TH STREET, ON A CURVE WITH TANGENTS
ME1851''EXTENDING WEST AND SOUTHEAST, SET IN THE TOP OF THE CENTER OF THE
ME1851''SOUTHWEST CONCRETE HEAD WALL OF A 3-FOOT CONCRETE CULVERT, 30
ME1851''FEET SOUTHWEST OF AND ABOUT 1 FOOT BELOW THE CENTER LINE OF THE
ME1851''HIGHWAY.
ME1851
ME1851                          STATION RECOVERY (1971)
ME1851
ME1851''RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1971
ME1851''RECOVERED IN GOOD CONDITION.
ME1851
ME1851                          STATION RECOVERY (1977)
ME1851
ME1851''RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1977
ME1851''RECOVERED IN GOOD CONDITION.