AA0296 ***********************************************************************
AA0296  DESIGNATION -  U 278
AA0296  PID         -  AA0296
AA0296  STATE/COUNTY-  FL/MONROE
AA0296  USGS QUAD   -  SEVENMILE BRIDGE (1979)
AA0296
AA0296                         *CURRENT SURVEY CONTROL
AA0296  ___________________________________________________________________
AA0296* NAD 83(1986)-  24 42 21.     (N)    081 08 17.     (W)     SCALED
AA0296* NAVD 88     -         9.025  (meters)      29.61   (feet)  ADJUSTED
AA0296  ___________________________________________________________________
AA0296  GEOID HEIGHT-         -22.14  (meters)                     GEOID99
AA0296  DYNAMIC HT  -           9.010 (meters)      29.56  (feet)  COMP
AA0296  MODELED GRAV-     978,967.0   (mgal)                       NAVD 88
AA0296
AA0296  VERT ORDER  -  FIRST     CLASS II
AA0296
AA0296.The horizontal coordinates were scaled from a topographic map and have
AA0296.an estimated accuracy of +/- 6 seconds.
AA0296
AA0296.The orthometric height was determined by differential leveling
AA0296.and adjusted by the National Geodetic Survey in June 1991.
AA0296
AA0296.The geoid height was determined by GEOID99.
AA0296
AA0296.The dynamic height is computed by dividing the NAVD 88
AA0296.geopotential number by the normal gravity value computed on the
AA0296.Geodetic Reference System of 1980 (GRS 80) ellipsoid at 45
AA0296.degrees latitude (g = 980.6199 gals.).
AA0296
AA0296.The modeled gravity was interpolated from observed gravity values.
AA0296
AA0296;                    North         East    Units  Estimated Accuracy
AA0296;SPC FL E     -    41,270.      186,030.      MT  (+/- 180 meters Scaled)
AA0296
AA0296                          SUPERSEDED SURVEY CONTROL
AA0296
AA0296  NGVD 29     -         9.446  (m)           30.99   (f) ADJUSTED    1 2
AA0296
AA0296.Superseded values are not recommended for survey control.
AA0296.NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums.
AA0296.See file dsdata.txt to determine how the superseded data were derived.
AA0296
AA0296_MARKER: DB = BENCH MARK DISK
AA0296_SETTING: 36 = BRIDGE CURB
AA0296_STAMPING: U 278 1966
AA0296_STABILITY: B = PROBABLY HOLD POSITION/ELEVATION WELL
AA0296
AA0296  HISTORY     - Date     Condition        Recov. By
AA0296  HISTORY     - 1966     MONUMENTED       CGS
AA0296  HISTORY     - 1978     GOOD             NGS
AA0296  HISTORY     - 1982     GOOD             LOCSUR
AA0296
AA0296                          STATION DESCRIPTION
AA0296
AA0296''DESCRIBED BY COAST AND GEODETIC SURVEY 1966
AA0296''3.8 MI SW FROM MARATHON.
AA0296''ABOUT 3.75 MILES SOUTHWEST ALONG U.S. HIGHWAY 1 FROM THE POST
AA0296''OFFICE AT MARATHON, 0.85 MILE WEST OF THE EAST END OF THE SEVEN
AA0296''MILE BRIDGE, AT MILE POST NO. 46, SET ON THE TOP OF THE NORTH
AA0296''CONCRETE CURB OF THE BRIDGE, 10.0 FOOT NORTH OF THE CENTER
AA0296''LINE OF THE HIGHWAY AND 1/2 FOOT ABOVE THE LEVEL OF THE HIGHWAY.
AA0296
AA0296                          STATION RECOVERY (1978)
AA0296
AA0296''RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1978
AA0296''RECOVERED IN GOOD CONDITION.
AA0296
AA0296                          STATION RECOVERY (1982)
AA0296
AA0296''RECOVERY NOTE BY LOCAL SURVEYOR (INDIVIDUAL OR FIRM) 1982
AA0296''ABOUT 3.75 MILES SOUTHWEST ALONG U.S. HWY 1, FROM POST OFFICE AT
AA0296''MARATHON, 0.85 MILES WEST OF THE EAST END OF THE OLD SEVEN MILE
AA0296''BRIDGE, SET IN THE TOP OF THE NORTH CONCRETE CURB, 10.0 FEET NORTH OF
AA0296''CENTERLINE OF HIGHWAY AND 1/2 FOOT ABOVE LEVEL OF HIGHWAY.