AL6484 ***********************************************************************
AL6484  DESIGNATION -  J 257
AL6484  PID         -  AL6484
AL6484  STATE/COUNTY-  FL/HILLSBOROUGH
AL6484  USGS QUAD   -  SULPHUR SPRINGS (1995)
AL6484
AL6484                         *CURRENT SURVEY CONTROL
AL6484  ___________________________________________________________________
AL6484* NAD 83(1986)-  28 03 17.     (N)    082 26 53.     (W)     SCALED
AL6484* NAVD 88     -        10.370  (meters)      34.02   (feet)  ADJUSTED
AL6484  ___________________________________________________________________
AL6484  GEOID HEIGHT-         -25.12  (meters)                     GEOID99
AL6484  DYNAMIC HT  -          10.354 (meters)      33.97  (feet)  COMP
AL6484  MODELED GRAV-     979,189.9   (mgal)                       NAVD 88
AL6484
AL6484  VERT ORDER  -  FIRST     CLASS I
AL6484
AL6484.The horizontal coordinates were scaled from a topographic map and have
AL6484.an estimated accuracy of +/- 6 seconds.
AL6484
AL6484.The orthometric height was determined by differential leveling
AL6484.and adjusted by the National Geodetic Survey in June 1991.
AL6484
AL6484.The geoid height was determined by GEOID99.
AL6484
AL6484.The dynamic height is computed by dividing the NAVD 88
AL6484.geopotential number by the normal gravity value computed on the
AL6484.Geodetic Reference System of 1980 (GRS 80) ellipsoid at 45
AL6484.degrees latitude (g = 980.6199 gals.).
AL6484
AL6484.The modeled gravity was interpolated from observed gravity values.
AL6484
AL6484;                    North         East    Units  Estimated Accuracy
AL6484;SPC FL W     -   412,350.      155,950.      MT  (+/- 180 meters Scaled)
AL6484
AL6484                          SUPERSEDED SURVEY CONTROL
AL6484
AL6484  NGVD 29     -        10.626  (m)           34.86   (f) ADJ UNCH    1 1
AL6484
AL6484.Superseded values are not recommended for survey control.
AL6484.NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums.
AL6484.See file dsdata.txt to determine how the superseded data were derived.
AL6484
AL6484_MARKER: DB = BENCH MARK DISK
AL6484_SETTING: 7 = SET IN TOP OF CONCRETE MONUMENT
AL6484_STAMPING: J 257 1965
AL6484_STABILITY: C = MAY HOLD, BUT OF TYPE COMMONLY SUBJECT TO
AL6484+STABILITY: SURFACE MOTION
AL6484
AL6484  HISTORY     - Date     Condition        Recov. By
AL6484  HISTORY     - 1965     MONUMENTED       CGS
AL6484  HISTORY     - 1966     GOOD             NGS
AL6484  HISTORY     - 19910319 GOOD             USPSQD
AL6484
AL6484                          STATION DESCRIPTION
AL6484
AL6484''DESCRIBED BY NATIONAL GEODETIC SURVEY 1966
AL6484''1.8 MI N FROM TAMPA.
AL6484''ABOUT 1.8 MILES NORTH ALONG THE SEABOARD AIR LINE RAILROAD FROM
AL6484''SULPHUR SPRINGS STATION AT TAMPA, ABOUT 120 YARDS NORTH OF THE
AL6484''CROSSING OF FOWLER AVENUE, NEAR THE SOUTHWEST CORNER OF 8-BY-14-FOOT
AL6484''STEEL FENCE AROUND AN AUTOMATIC GAS PUMP NO. AA-156, 30.0 FEET
AL6484''EAST OF THE EAST RAIL, 1 FOOT SOUTH OF THE SOUTHWEST CORNER OF THE
AL6484''FENCE, 1.3 FEET NORTH OF A METAL WITNESS POST, ABOUT 3 FEET BELOW
AL6484''THE LEVEL OF THE TRACK AND SET IN THE TOP OF A CONCRETE POST
AL6484''PROJECTING 0.2 FOOT.
AL6484
AL6484                          STATION RECOVERY (1991)
AL6484
AL6484''RECOVERY NOTE BY US POWER SQUADRON 1991 (RF)
AL6484''RECOVERED IN GOOD CONDITION.