MY0571 ***********************************************************************
MY0571  DESIGNATION -  C 12 MAGS
MY0571  PID         -  MY0571
MY0571  STATE/COUNTY-  MA/SUFFOLK
MY0571  USGS QUAD   -
MY0571
MY0571                         *CURRENT SURVEY CONTROL
MY0571  ___________________________________________________________________
MY0571* NAD 83(1986)-  42 20 46.     (N)    071 05 10.     (W)     SCALED
MY0571* NAVD 88     -         4.281  (meters)      14.05   (feet)  ADJUSTED
MY0571  ___________________________________________________________________
MY0571  GEOID HEIGHT-         -27.78  (meters)                     GEOID99
MY0571  DYNAMIC HT  -           4.280 (meters)      14.04  (feet)  COMP
MY0571  MODELED GRAV-     980,377.6   (mgal)                       NAVD 88
MY0571
MY0571  VERT ORDER  -  FIRST     CLASS II
MY0571
MY0571.The horizontal coordinates were scaled from a topographic map and have
MY0571.an estimated accuracy of +/- 6 seconds.
MY0571
MY0571.The orthometric height was determined by differential leveling
MY0571.and adjusted by the National Geodetic Survey in June 1991.
MY0571.WARNING-Repeat measurements at this control monument indicate possible
MY0571.vertical movement.
MY0571
MY0571.The geoid height was determined by GEOID99.
MY0571
MY0571.The dynamic height is computed by dividing the NAVD 88
MY0571.geopotential number by the normal gravity value computed on the
MY0571.Geodetic Reference System of 1980 (GRS 80) ellipsoid at 45
MY0571.degrees latitude (g = 980.6199 gals.).
MY0571
MY0571.The modeled gravity was interpolated from observed gravity values.
MY0571
MY0571;                    North         East    Units  Estimated Accuracy
MY0571;SPC MA M     -   899,600.      234,100.      MT  (+/- 180 meters Scaled)
MY0571
MY0571                          SUPERSEDED SURVEY CONTROL
MY0571
MY0571  NGVD 29     -         4.535  (m)           14.88   (f) ADJ UNCH    1 2
MY0571
MY0571.Superseded values are not recommended for survey control.
MY0571.NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums.
MY0571.See file dsdata.txt to determine how the superseded data were derived.
MY0571
MY0571_MARKER: DB = BENCH MARK DISK
MY0571_SETTING: 30 = WALL
MY0571_STAMPING: C 12 MASS GS 1936 15.035
MY0571_STABILITY: D = MARK OF QUESTIONABLE OR UNKNOWN STABILITY
MY0571
MY0571  HISTORY     - Date     Condition        Recov. By
MY0571  HISTORY     - 1936     MONUMENTED       MAGS
MY0571  HISTORY     - 1966     GOOD             NGS
MY0571  HISTORY     - 1978     GOOD             NGS
MY0571
MY0571                          STATION DESCRIPTION
MY0571
MY0571''DESCRIBED BY NATIONAL GEODETIC SURVEY 1966
MY0571''AT BOSTON.
MY0571''AT BOSTON, IN BACK BAY DIVISION, ALONG NORWAY STREET, NEAR THE
MY0571''JUNCTION OF ST. PAUL STREET, IN THE CHRISTIAN SCIENCE PUBLISHING
MY0571''SOCIETY BUILDING AT NO. 1 NORWAY STREET, SET IN THE TOP AT THE
MY0571''WEST END OF A STONE RETAINING WALL WHICH PROJECTS ABOUT 2 FEET
MY0571''ABOVE THE GROUND AND FORMS AN OPENING FOR THE BASEMENT WINDOWS,
MY0571''42.5 FEET NORTH OF THE NORTH CURB OF NORWAY STREET, 68 FEET
MY0571''EAST OF THE CENTER OF ST. PAUL STREET (MEASURED ALONG THE STREET),
MY0571''AND ABOUT 3 FEET ABOVE THE LEVEL OF THE STREET.
MY0571
MY0571                          STATION RECOVERY (1978)
MY0571
MY0571''RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1978
MY0571''RECOVERED IN GOOD CONDITION.