GA1233 ***********************************************************************
GA1233  DESIGNATION -  K 22
GA1233  PID         -  GA1233
GA1233  STATE/COUNTY-  VA/SCOTT
GA1233  USGS QUAD   -  CLINCHPORT (1988)
GA1233
GA1233                         *CURRENT SURVEY CONTROL
GA1233  ___________________________________________________________________
GA1233* NAD 83(1986)-  36 42 17.     (N)    082 44 37.     (W)     SCALED
GA1233* NAVD 88     -       407.668  (meters)    1337.49   (feet)  ADJUSTED
GA1233  ___________________________________________________________________
GA1233  GEOID HEIGHT-         -30.98  (meters)                     GEOID99
GA1233  DYNAMIC HT  -         407.306 (meters)    1336.30  (feet)  COMP
GA1233  MODELED GRAV-     979,730.1   (mgal)                       NAVD 88
GA1233
GA1233  VERT ORDER  -  FIRST     CLASS I
GA1233
GA1233.The horizontal coordinates were scaled from a topographic map and have
GA1233.an estimated accuracy of +/- 6 seconds.
GA1233
GA1233.The orthometric height was determined by differential leveling
GA1233.and adjusted by the National Geodetic Survey in June 1991.
GA1233
GA1233.The geoid height was determined by GEOID99.
GA1233
GA1233.The dynamic height is computed by dividing the NAVD 88
GA1233.geopotential number by the normal gravity value computed on the
GA1233.Geodetic Reference System of 1980 (GRS 80) ellipsoid at 45
GA1233.degrees latitude (g = 980.6199 gals.).
GA1233
GA1233.The modeled gravity was interpolated from observed gravity values.
GA1233
GA1233;                    North         East    Units  Estimated Accuracy
GA1233;SPC VA S     - 1,049,740.    3,120,940.      MT  (+/- 180 meters Scaled)
GA1233
GA1233                          SUPERSEDED SURVEY CONTROL
GA1233
GA1233  NGVD 29     -       407.812  (m)         1337.96   (f) ADJ UNCH    1 1
GA1233
GA1233.Superseded values are not recommended for survey control.
GA1233.NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums.
GA1233.See file dsdata.txt to determine how the superseded data were derived.
GA1233
GA1233_MARKER: DB = BENCH MARK DISK
GA1233_SETTING: 66 = SET IN ROCK OUTCROP
GA1233_STAMPING: K 22 1930 1338.131
GA1233_STABILITY: A = MOST RELIABLE AND EXPECTED TO HOLD
GA1233+STABILITY: POSITION/ELEVATION WELL
GA1233
GA1233  HISTORY     - Date     Condition        Recov. By
GA1233  HISTORY     - 1930     MONUMENTED       CGS
GA1233  HISTORY     - 1967     GOOD             NGS
GA1233
GA1233                          STATION DESCRIPTION
GA1233
GA1233''DESCRIBED BY NATIONAL GEODETIC SURVEY 1967
GA1233''4.9 MI SE FROM DUFFIELD.
GA1233''ABOUT 4.9 MILES SOUTHEAST ALONG THE SOUTHERN RAILWAY COMPANY
GA1233''RAILROAD FROM THE STATION AT DUFFIELD, OR ABOUT 2.9 MILES NORTH
GA1233''ALONG THE SOUTHERN RAILWAY COMPANY RAILROAD FROM THE NORTHWEST
GA1233''END OF THE RAILROAD BRIDGE OVER THE CLINCH RIVER AT CLINCHPORT,
GA1233''AT THE NORTH ENTRANCE OF THE NATURAL TUNNEL WHICH IS USED BY THE
GA1233''RAILROAD, 300 FEET SOUTH OF MILEPOST 24, 41 FEET WEST OF THE
GA1233''WEST RAIL OF THE TRACK, SET IN THE TOP OF A ROCK LEDGE AT THE FOOT
GA1233''OF THE WEST SIDE OF THE ARCH OF THE TUNNEL, 32 FEET WEST AND
GA1233''ACROSS A CREEK FROM THE WEST EDGE OF A CONCRETE RETAINING WALL,
GA1233''ABOUT 6 FEET ABOVE THE LEVEL OF THE CREEK, AND ABOUT 1 FOOT BELOW
GA1233''THE LEVEL OF THE TRACK.