ME1747 ***********************************************************************
ME1747  DESIGNATION -  T 139
ME1747  PID         -  ME1747
ME1747  STATE/COUNTY-  IL/COOK
ME1747  USGS QUAD   -  SAG BRIDGE (1997)
ME1747
ME1747                         *CURRENT SURVEY CONTROL
ME1747  ___________________________________________________________________
ME1747* NAD 83(1986)-  41 42 42.     (N)    087 54 51.     (W)     SCALED
ME1747* NAVD 88     -       187.228  (meters)     614.26   (feet)  ADJUSTED
ME1747  ___________________________________________________________________
ME1747  GEOID HEIGHT-         -33.22  (meters)                     GEOID99
ME1747  DYNAMIC HT  -         187.160 (meters)     614.04  (feet)  COMP
ME1747  MODELED GRAV-     980,256.4   (mgal)                       NAVD 88
ME1747
ME1747  VERT ORDER  -  FIRST     CLASS II
ME1747
ME1747.The horizontal coordinates were scaled from a topographic map and have
ME1747.an estimated accuracy of +/- 6 seconds.
ME1747
ME1747.The orthometric height was determined by differential leveling
ME1747.and adjusted by the National Geodetic Survey in June 1991.
ME1747
ME1747.The geoid height was determined by GEOID99.
ME1747
ME1747.The dynamic height is computed by dividing the NAVD 88
ME1747.geopotential number by the normal gravity value computed on the
ME1747.Geodetic Reference System of 1980 (GRS 80) ellipsoid at 45
ME1747.degrees latitude (g = 980.6199 gals.).
ME1747
ME1747.The modeled gravity was interpolated from observed gravity values.
ME1747
ME1747;                    North         East    Units  Estimated Accuracy
ME1747;SPC IL E     -   560,160.      334,880.      MT  (+/- 180 meters Scaled)
ME1747
ME1747                          SUPERSEDED SURVEY CONTROL
ME1747
ME1747  NGVD 29     -       187.315  (m)          614.55   (f) ADJ UNCH    1 2
ME1747
ME1747.Superseded values are not recommended for survey control.
ME1747.NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums.
ME1747.See file dsdata.txt to determine how the superseded data were derived.
ME1747
ME1747_MARKER: DB = BENCH MARK DISK
ME1747_SETTING: 7 = SET IN TOP OF CONCRETE MONUMENT
ME1747_STAMPING: T 139 1947
ME1747_STABILITY: C = MAY HOLD, BUT OF TYPE COMMONLY SUBJECT TO
ME1747+STABILITY: SURFACE MOTION
ME1747
ME1747  HISTORY     - Date     Condition        Recov. By
ME1747  HISTORY     - 1947     MONUMENTED       CGS
ME1747  HISTORY     - 1971     GOOD             NGS
ME1747  HISTORY     - 1977     GOOD             NGS
ME1747  HISTORY     - 1987     GOOD             USPSQD
ME1747  HISTORY     - 1988     GOOD             USPSQD
ME1747  HISTORY     - 1989     GOOD             USPSQD
ME1747  HISTORY     - 1989     GOOD             USPSQD
ME1747
ME1747                          STATION DESCRIPTION
ME1747
ME1747''DESCRIBED BY COAST AND GEODETIC SURVEY 1947
ME1747''2.6 MI SW FROM WILLOW SPRINGS.
ME1747''ABOUT 2.55 MILES SOUTHWEST ALONG STATE HIGHWAY 4A FROM THE
ME1747''POST OFFICE AT WILLOW SPRINGS, ABOUT 0.2 MILE NORTHEAST OF
ME1747''THE JUNCTION OF 103RD STREET, AT THE JUNCTION OF THE ENTRANCE
ME1747''TO THE RED GATE WOODS PICNIC GROUNDS, ABOUT 200 FEET SOUTHWEST
ME1747''OF THE SOUTHEAST CORNER OF A TWO-STORY HOUSE, 45 FEET NORTHWEST
ME1747''OF THE CENTER LINE OF THE HIGHWAY, 36 FEET NORTHEAST OF THE PROLONGED
ME1747''CENTER LINE OF THE ENTRANCE TO THE PICNIC GROUNDS, 33 FEET SOUTHWEST
ME1747''OF A POWER POLE AND IN LINE WITH THE ROW OF POLES, 1.5 FEET
ME1747''SOUTHEAST OF THE FENCE LINE, 2 FEET NORTHEAST OF A WHITE WOODEN
ME1747''WITNESS POST, ABOUT LEVEL WITH THE HIGHWAY AND SET IN THE TOP
ME1747''OF A CONCRETE POST PROJECTING 4 INCHES.
ME1747
ME1747                          STATION RECOVERY (1971)
ME1747
ME1747''RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1971
ME1747''RECOVERED IN GOOD CONDITION.
ME1747
ME1747                          STATION RECOVERY (1977)
ME1747
ME1747''RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1977
ME1747''RECOVERED IN GOOD CONDITION.
ME1747
ME1747                          STATION RECOVERY (1987)
ME1747
ME1747''RECOVERY NOTE BY US POWER SQUADRON 1987 (MBO)
ME1747''RECOVERED IN GOOD CONDITION.
ME1747
ME1747                          STATION RECOVERY (1988)
ME1747
ME1747''RECOVERY NOTE BY US POWER SQUADRON 1988 (MBO)
ME1747''RECOVERED IN GOOD CONDITION.
ME1747
ME1747                          STATION RECOVERY (1989)
ME1747
ME1747''RECOVERY NOTE BY US POWER SQUADRON 1989 (CEP)
ME1747''RECOVERED IN GOOD CONDITION.
ME1747
ME1747                          STATION RECOVERY (1989)
ME1747
ME1747''RECOVERY NOTE BY US POWER SQUADRON 1989 (MBO)
ME1747''RECOVERED IN GOOD CONDITION.