AC7983 ***********************************************************************
AC7983  CBN         -  This is a Cooperative Base Network Control Station.
AC7983  DESIGNATION -  SOUTH A B
AC7983  PID         -  AC7983
AC7983  STATE/COUNTY-  SD/PENNINGTON
AC7983  USGS QUAD   -  PACTOLA DAM (1971)
AC7983
AC7983                         *CURRENT SURVEY CONTROL
AC7983  ___________________________________________________________________
AC7983* NAD 83(1996)-  44 04 11.31896(N)    103 29 02.50462(W)     ADJUSTED
AC7983* NAVD 88     -      1414.5    (meters)    4641.     (feet)  GPS OBS
AC7983  ___________________________________________________________________
AC7983  X           -  -1,070,524.419 (meters)                     COMP
AC7983  Y           -  -4,464,537.111 (meters)                     COMP
AC7983  Z           -   4,414,642.176 (meters)                     COMP
AC7983  LAPLACE CORR-         -15.04  (seconds)                    DEFLEC99
AC7983  ELLIP HEIGHT-        1400.38  (meters)                     GPS OBS
AC7983  GEOID HEIGHT-         -14.15  (meters)                     GEOID99
AC7983
AC7983  HORZ ORDER  -  B
AC7983  ELLP ORDER  -  FOURTH    CLASS I
AC7983
AC7983.The horizontal coordinates were established by GPS observations
AC7983.and adjusted by the National Geodetic Survey in April 1997.
AC7983.This is a SPECIAL STATUS position.  See SPECIAL STATUS under the
AC7983.DATUM ITEM on the data sheet items page.
AC7983
AC7983.The orthometric height was determined by GPS observations and a
AC7983.high-resolution geoid model.
AC7983
AC7983.The X, Y, and Z were computed from the position and the ellipsoidal ht.
AC7983
AC7983.The Laplace correction was computed from DEFLEC99 derived deflections.
AC7983
AC7983.The ellipsoidal height was determined by GPS observations
AC7983.and is referenced to NAD 83.
AC7983
AC7983.The geoid height was determined by GEOID99.
AC7983
AC7983;                    North         East     Units   Scale      Converg.
AC7983;SPC SD S     -   197,697.971   347,667.396   MT  0.99993788 -2 10 24.6
AC7983;UTM  13      - 4,880,743.809   621,399.503   MT  0.99978126 +1 03 16.3
AC7983
AC7983                          SUPERSEDED SURVEY CONTROL
AC7983
AC7983.No superseded survey control is available for this station.
AC7983
AC7983_MARKER: DB = BENCH MARK DISK
AC7983_SETTING: 4 = OBJECT SURROUNDED BY MASS OF CONCRETE
AC7983_STAMPING: SOUTH A B
AC7983_MAGNETIC: N = NO MAGNETIC MATERIAL
AC7983_STABILITY: D = MARK OF QUESTIONABLE OR UNKNOWN STABILITY
AC7983_SATELLITE: THE SITE LOCATION WAS REPORTED AS SUITABLE FOR
AC7983+SATELLITE: SATELLITE OBSERVATIONS - March 12, 1996
AC7983
AC7983  HISTORY     - Date     Condition        Recov. By
AC7983  HISTORY     - UNK      MONUMENTED
AC7983  HISTORY     - 19960312 GOOD             SDDT
AC7983
AC7983                          STATION DESCRIPTION
AC7983
AC7983''DESCRIBED BY SD DEPT OF TRANSP 1996 (DFC)
AC7983''THE STATION IS LOCATED ABOUT 16.0 MI (25.7 KM) WEST OF RAPID CITY,
AC7983''14.0 MI (22.5 KM) NORTH/NORTHEAST OF HILL CITY, AND 5.0 MI (8.0 KM)
AC7983''SOUTHEAST OF SILVER CITY, AT THE PACTOLA LAKE VISITORS CENTER ON U.S.
AC7983''HIGHWAY 385.  OWNERSHIP--U.S. DEPARTMENT OF AGRICULTURE.  TO REACH THE
AC7983''STATION FROM THE POST OFFICE IN HILL CITY, GO NORTHEAST ON U.S.
AC7983''HIGHWAYS 385 AND 16 FOR 3.5 MI (5.6 KM) TO THE JUNCTION OF U.S.
AC7983''HIGHWAY 16 EAST AND U.S. HIGHWAY 385 NORTH, TURN LEFT AND GO NORTH ON
AC7983''U.S. HIGHWAY 385 FOR 10.0 MI (16.1 KM) TO THE PACTOLA LAKE VISITORS
AC7983''CENTER AND THE STATION ON THE LEFT.  THE STATION IS LOCATED 100.0 FT
AC7983''(30.5 M) NORTH OF A CORNER OF THE NORTH GUARD RAIL, 75.0 FT (22.9 M)
AC7983''NORTHEAST OF THE NORTH END OF A METAL HANDRAIL, 75.0 FT (22.9 M) WEST
AC7983''OF THE HIGHWAY CENTER, 15.0 FT (4.6 M) BELOW THE LEVEL OF THE HIGHWAY,
AC7983''AND 2.0 FT (0.6 M) NORTHEAST OF A WITNESS POST.