BU1470 ***********************************************************************
BU1470  DESIGNATION -  X 409
BU1470  PID         -  BU1470
BU1470  STATE/COUNTY-  AL/ESCAMBIA
BU1470  USGS QUAD   -  FREEMANVILLE (1983)
BU1470
BU1470                         *CURRENT SURVEY CONTROL
BU1470  ___________________________________________________________________
BU1470* NAD 83(1992)-  31 01 14.41245(N)    087 32 20.57375(W)     ADJUSTED
BU1470* NAVD 88     -        69.462  (meters)     227.89   (feet)  ADJUSTED
BU1470  ___________________________________________________________________
BU1470  X           -     234,909.952 (meters)                     COMP
BU1470  Y           -  -5,465,800.395 (meters)                     COMP
BU1470  Z           -   3,267,879.052 (meters)                     COMP
BU1470  LAPLACE CORR-           1.42  (seconds)                    DEFLEC99
BU1470  ELLIP HEIGHT-          41.50  (meters)                     GPS OBS
BU1470  GEOID HEIGHT-         -28.02  (meters)                     GEOID99
BU1470  DYNAMIC HT  -          69.373 (meters)     227.60  (feet)  COMP
BU1470  MODELED GRAV-     979,360.5   (mgal)                       NAVD 88
BU1470
BU1470  HORZ ORDER  -  FIRST
BU1470  VERT ORDER  -  FIRST     CLASS II
BU1470  ELLP ORDER  -  FOURTH    CLASS I
BU1470
BU1470.The horizontal coordinates were established by GPS observations
BU1470.and adjusted by the National Geodetic Survey in January 1998.
BU1470
BU1470.The orthometric height was determined by differential leveling
BU1470.and adjusted by the National Geodetic Survey in June 1991.
BU1470
BU1470.The X, Y, and Z were computed from the position and the ellipsoidal ht.
BU1470
BU1470.The Laplace correction was computed from DEFLEC99 derived deflections.
BU1470
BU1470.The ellipsoidal height was determined by GPS observations
BU1470.and is referenced to NAD 83.
BU1470
BU1470.The geoid height was determined by GEOID99.
BU1470
BU1470.The dynamic height is computed by dividing the NAVD 88
BU1470.geopotential number by the normal gravity value computed on the
BU1470.Geodetic Reference System of 1980 (GRS 80) ellipsoid at 45
BU1470.degrees latitude (g = 980.6199 gals.).
BU1470
BU1470.The modeled gravity was interpolated from observed gravity values.
BU1470
BU1470;                    North         East     Units   Scale      Converg.
BU1470;SPC AL W     -   113,145.726   596,271.777   MT  0.99993350 -0 01 12.4
BU1470;UTM  16      - 3,432,017.436   448,549.931   MT  0.99963265 -0 16 40.1
BU1470
BU1470                          SUPERSEDED SURVEY CONTROL
BU1470
BU1470  NAD 83(1992)-  31 01 14.41098(N)    087 32 20.57489(W) AD(       ) 3
BU1470  NAD 83(1986)-  31 01 14.43371(N)    087 32 20.58269(W) AD(       ) 3
BU1470  NAD 27      -  31 01 13.77348(N)    087 32 20.62895(W) AD(       ) 3
BU1470  NGVD 29     -        69.432  (m)          227.79   (f) ADJ UNCH    1 2
BU1470
BU1470.Superseded values are not recommended for survey control.
BU1470.NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums.
BU1470.See file dsdata.txt to determine how the superseded data were derived.
BU1470
BU1470_MARKER: DB = BENCH MARK DISK
BU1470_SETTING: 38 = ABUTMENT OF LARGE BRIDGE
BU1470_STAMPING: X 409 1955
BU1470_MAGNETIC: O = OTHER; SEE DESCRIPTION
BU1470_STABILITY: B = PROBABLY HOLD POSITION/ELEVATION WELL
BU1470_SATELLITE: THE SITE LOCATION WAS REPORTED AS SUITABLE FOR
BU1470+SATELLITE: SATELLITE OBSERVATIONS - May 12, 1987
BU1470
BU1470  HISTORY     - Date     Condition        Recov. By
BU1470  HISTORY     - 1955     MONUMENTED       CGS
BU1470  HISTORY     - 19870512 GOOD             NGS
BU1470  HISTORY     - 19970218 GOOD             BDE
BU1470
BU1470                          STATION DESCRIPTION
BU1470
BU1470''DESCRIBED BY COAST AND GEODETIC SURVEY 1955
BU1470''2.8 MI W FROM ATMORE.
BU1470''2.8 MILES WEST ALONG THE LOUISVILLE AND NASHVILLE RAILROAD FROM THE
BU1470''STATION AT ATMORE, ABOUT 0.35 MILE WEST OF MILE POST 624, IN THE TOP
BU1470''OF THE NORTH END OF THE WEST ABUTMENT OF U.S. HIGHWAY 31 BRIDGE OVER
BU1470''BRUSHY CREEK, 16 FEET NORTH OF CENTER LINE OF HIGHWAY, ABOUT 20 YARDS
BU1470''SOUTH OF TRACK, 1 FOOT NORTH OF CONCRETE BANISTER AND ABOUT 3/4 FOOT
BU1470''ABOVE LEVEL OF BRIDGE FLOOR.
BU1470
BU1470                          STATION RECOVERY (1987)
BU1470
BU1470''RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1987
BU1470''THE STATION IS 4.0 KM (2.5 MI) SOUTH ALONG U.S. HIGHWAY 31 FROM THE
BU1470''RAILROAD OVERPASS AT ATMORE, 5.3 METERS (17.5 FT) NORTHWEST FROM THE
BU1470''CENTER OF HIGHWAY 31, SET IN THE SOUTHWEST ABUTMENT OF BRIDGE OVER
BU1470''BRUSHY CREEK AND 0.3 METER (1 FT) ABOVE HIGHWAY 31.
BU1470''DESCRIBED BY K.R.W., TYPED BY E.D.W.
BU1470
BU1470                          STATION RECOVERY (1997)
BU1470
BU1470''RECOVERY NOTE BY BASKERVILLE DONOVAN INCORPORATED 1997 (RB)
BU1470''RECOVERED AS DESCRIBED.