AC3349 ***********************************************************************
AC3349  TIDAL BM    -  This is a Tidal Bench Mark.
AC3349  DESIGNATION -  872 3688 TIDAL 1 A ERBA
AC3349  PID         -  AC3349
AC3349  STATE/COUNTY-  FL/MONROE
AC3349  USGS QUAD   -  ROCK HARBOR (1990)
AC3349
AC3349                         *CURRENT SURVEY CONTROL
AC3349  ___________________________________________________________________
AC3349* NAD 83(1986)-  25 04 55.     (N)    080 26 47.     (W)     SCALED
AC3349* NAVD 88     -         0.470  (meters)       1.54   (feet)  ADJUSTED
AC3349  ___________________________________________________________________
AC3349  GEOID HEIGHT-         -24.18  (meters)                     GEOID99
AC3349  DYNAMIC HT  -           0.470 (meters)       1.54  (feet)  COMP
AC3349  MODELED GRAV-     978,977.9   (mgal)                       NAVD 88
AC3349
AC3349  VERT ORDER  -  SECOND    CLASS I
AC3349
AC3349.The horizontal coordinates were scaled from a topographic map and have
AC3349.an estimated accuracy of +/- 6 seconds.
AC3349
AC3349.The orthometric height was determined by differential leveling
AC3349.and adjusted by the National Geodetic Survey in June 1991.
AC3349
AC3349.This Tidal Bench Mark is designated as VM 5964
AC3349.by the Center for Operational Oceanographic Products and Services.
AC3349
AC3349.The geoid height was determined by GEOID99.
AC3349
AC3349.The dynamic height is computed by dividing the NAVD 88
AC3349.geopotential number by the normal gravity value computed on the
AC3349.Geodetic Reference System of 1980 (GRS 80) ellipsoid at 45
AC3349.degrees latitude (g = 980.6199 gals.).
AC3349
AC3349.The modeled gravity was interpolated from observed gravity values.
AC3349
AC3349;                    North         East    Units  Estimated Accuracy
AC3349;SPC FL E     -    83,030.      255,850.      MT  (+/- 180 meters Scaled)
AC3349
AC3349                          SUPERSEDED SURVEY CONTROL
AC3349
AC3349  NGVD 29     -         0.946  (m)            3.10   (f) ADJUSTED    2 1
AC3349
AC3349.Superseded values are not recommended for survey control.
AC3349.NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums.
AC3349.See file dsdata.txt to determine how the superseded data were derived.
AC3349
AC3349_MARKER: DJ = TIDAL STATION DISK
AC3349_SETTING: 7 = SET IN TOP OF CONCRETE MONUMENT
AC3349_STAMPING: TIDAL BM 1A
AC3349_PROJECTION: FLUSH
AC3349_STABILITY: C = MAY HOLD, BUT OF TYPE COMMONLY SUBJECT TO
AC3349+STABILITY: SURFACE MOTION
AC3349
AC3349  HISTORY     - Date     Condition        Recov. By
AC3349  HISTORY     - UNK      MONUMENTED       LOCSUR
AC3349  HISTORY     - 1982     GOOD             FLDNR
AC3349
AC3349                          STATION DESCRIPTION
AC3349
AC3349''DESCRIBED BY FL DEPT OF NAT RES 1982
AC3349''IN KEY LARGO.
AC3349''BEGIN AT THE WALDORF PLAZA (INTERSECTION OF OCEAN BAY DRIVE AND U.S.
AC3349''HIGHWAY 1) IN KEY LARGO, GO 0.7 MILE SOUTH ON OCEAN BAY DRIVE TO A
AC3349''DIRT ROAD, GO 0.25 MILE WEST ON THE DIRT ROAD TO ITS END AND THE
AC3349''MARK.  THE MARK BEARS 133.4 FEET SOUTH OF THE EXTENDED CENTERLINE OF
AC3349''THE ROAD, 70 FEET NORTH OF THE SOUTH END OF THE CANA , 7.5 FEET EAST
AC3349''OF THE EAST EDGE OF THE CANAL, 56.4 FEET NORTHWEST OF BENCH MARK
AC3349''TIDAL BM-2A, 123.4 FEET SOUTH OF BENCH MARK TIDAL BM 3X.