MB0156 ***********************************************************************
MB0156  DESIGNATION -  N 273
MB0156  PID         -  MB0156
MB0156  STATE/COUNTY-  PA/ERIE
MB0156  USGS QUAD   -  EAST SPRINGFIELD (1990)
MB0156
MB0156                         *CURRENT SURVEY CONTROL
MB0156  ___________________________________________________________________
MB0156* NAD 83(1986)-  41 56 36.     (N)    080 29 56.     (W)     SCALED
MB0156* NAVD 88     -       208.254  (meters)     683.25   (feet)  ADJUSTED
MB0156  ___________________________________________________________________
MB0156  GEOID HEIGHT-         -34.59  (meters)                     GEOID99
MB0156  DYNAMIC HT  -         208.179 (meters)     683.00  (feet)  COMP
MB0156  MODELED GRAV-     980,257.6   (mgal)                       NAVD 88
MB0156
MB0156  VERT ORDER  -  SECOND    CLASS 0
MB0156
MB0156.The horizontal coordinates were scaled from a topographic map and have
MB0156.an estimated accuracy of +/- 6 seconds.
MB0156
MB0156.The orthometric height was determined by differential leveling
MB0156.and adjusted by the National Geodetic Survey in June 1991.
MB0156
MB0156.The geoid height was determined by GEOID99.
MB0156
MB0156.The dynamic height is computed by dividing the NAVD 88
MB0156.geopotential number by the normal gravity value computed on the
MB0156.Geodetic Reference System of 1980 (GRS 80) ellipsoid at 45
MB0156.degrees latitude (g = 980.6199 gals.).
MB0156
MB0156.The modeled gravity was interpolated from observed gravity values.
MB0156
MB0156;                    North         East    Units  Estimated Accuracy
MB0156;SPC PA N     -   200,930.      372,090.      MT  (+/- 180 meters Scaled)
MB0156
MB0156                          SUPERSEDED SURVEY CONTROL
MB0156
MB0156  NGVD 29     -       208.462  (m)          683.93   (f) ADJ UNCH    2 0
MB0156
MB0156.Superseded values are not recommended for survey control.
MB0156.NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums.
MB0156.See file dsdata.txt to determine how the superseded data were derived.
MB0156
MB0156_MARKER: DB = BENCH MARK DISK
MB0156_SETTING: 30 = CULVERT
MB0156_STAMPING: N 273 1961
MB0156_STABILITY: D = MARK OF QUESTIONABLE OR UNKNOWN STABILITY
MB0156
MB0156  HISTORY     - Date     Condition        Recov. By
MB0156  HISTORY     - 1961     MONUMENTED       CGS
MB0156  HISTORY     - 1975     GOOD             NGS
MB0156
MB0156                          STATION DESCRIPTION
MB0156
MB0156''DESCRIBED BY COAST AND GEODETIC SURVEY 1961
MB0156''2.2 MI SW FROM WEST SPRINGFIELD.
MB0156''ABOUT 1.8 MILES WEST ALONG INTERSTATE HIGHWAY 90 FROM THE
MB0156''JUNCTION OF U.S. HIGHWAY 6N AND INTERSTATE HIGHWAY 90.  IT IS
MB0156''DRILLED IN A SMALL CULVERT ABOUT 3.0 FEET LOWER THAN THE HIGHWAY,
MB0156''APPROXIMATELY .05 MILE EAST OF AN OVERHEAD BRIDGE, AND 45.1 FEET
MB0156''NORTH OF THE CENTER OF THE WEST BOUND LANE OF TRAFFIC OF
MB0156''INTERSTATE HIGHWAY 90.
MB0156
MB0156                          STATION RECOVERY (1975)
MB0156
MB0156''RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1975
MB0156''RECOVERED IN GOOD CONDITION.