HV0556 ***********************************************************************
HV0556  DESIGNATION -  DRILL
HV0556  PID         -  HV0556
HV0556  STATE/COUNTY-  VA/ARLINGTON
HV0556  USGS QUAD   -  WASHINGTON WEST (1983)
HV0556
HV0556                         *CURRENT SURVEY CONTROL
HV0556  ___________________________________________________________________
HV0556* NAD 83(1993)-  38 55 24.17478(N)    077 06 39.65219(W)     ADJUSTED
HV0556* NAVD 88     -        -0.     (meters)      -0.     (feet)  SCALED
HV0556  ___________________________________________________________________
HV0556  LAPLACE CORR-          -2.39  (seconds)                    DEFLEC99
HV0556  GEOID HEIGHT-         -31.89  (meters)                     GEOID99
HV0556
HV0556  HORZ ORDER  -  SECOND
HV0556
HV0556.The horizontal coordinates were established by classical geodetic methods
HV0556.and adjusted by the National Geodetic Survey in November 1994.
HV0556
HV0556.The orthometric height was scaled from a topographic map.
HV0556
HV0556.The Laplace correction was computed from DEFLEC99 derived deflections.
HV0556
HV0556.The geoid height was determined by GEOID99.
HV0556
HV0556;                    North         East     Units   Scale      Converg.
HV0556;SPC MD       -   457,698.35  1,280,749.84   sFT  0.99995019 -0 04 10.8
HV0556;SPC VA N     - 2,140,406.946 3,620,443.377   MT  0.99996260 +0 52 00.8
HV0556;SPC MD       -   139,506.737   390,373.332   MT  0.99995019 -0 04 10.8
HV0556;UTM  18      - 4,310,392.889   316,997.762   MT  1.00001240 -1 19 36.0
HV0556
HV0556|---------------------------------------------------------------------|
HV0556| PID    Reference Object                     Distance      Geod. Az  |
HV0556|                                                           dddmmss.s |
HV0556| HV4100 BLUFF                               APPROX. 0.6 KM 0053910.4 |
HV0556| HV1825 GALENA                              458.135 METERS 0254205.3 |
HV0556| HV3559 BIG                                 330.930 METERS 13545     |
HV0556|        DRILL RM 1                            5.745 METERS 22432     |
HV0556|        DRILL RM 2                            2.826 METERS 26710     |
HV0556|        DRILL WM 1                            2.402 METERS 30108     |
HV0556| HV0366 CREEK                               244.696 METERS 31608     |
HV0556|        DRILL WM 2                            2.585 METERS 33105     |
HV0556|---------------------------------------------------------------------|
HV0556
HV0556                          SUPERSEDED SURVEY CONTROL
HV0556
HV0556  NAD 83(1993)-  38 55 24.17368(N)    077 06 39.65386(W) AD(       ) 2
HV0556  NAD 83(1986)-  38 55 24.17353(N)    077 06 39.66381(W) AD(       ) 2
HV0556  NAD 27      -  38 55 23.77300(N)    077 06 40.73400(W) AD(       ) 2
HV0556
HV0556.Superseded values are not recommended for survey control.
HV0556.NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums.
HV0556.See file dsdata.txt to determine how the superseded data were derived.
HV0556
HV0556_MARKER: DD = SURVEY DISK
HV0556_SETTING: 66 = SET IN ROCK OUTCROP
HV0556
HV0556  HISTORY     - Date     Condition        Recov. By
HV0556  HISTORY     - 1925     MONUMENTED       USE
HV0556  HISTORY     - 1935     SEE DESCRIPTION  CGS
HV0556  HISTORY     - 1946     SEE DESCRIPTION  CGS
HV0556  HISTORY     - 1947     SEE DESCRIPTION  CGS
HV0556
HV0556                          STATION DESCRIPTION
HV0556
HV0556''DESCRIBED BY US ENGINEERS 1925 (GLB)
HV0556''STATION IS SITUATED ON A PROMINENT LEDGE ABOUT 1/2 MILE SE OF THE
HV0556''CHAIN BRIDGE ON THE VIRGINIA SIDE OF THE POTOMAC RIVER.  IT IS
HV0556''ABOUT 15 FEET FROM THE RIVERS EDGE AND 15 FEET FROM THE BASE
HV0556''OF THE BLUFF, AND ABOUT 12 FEET ABOVE THE WATER.
HV0556''
HV0556''STATION IS MARKED BY A UNITED STATES ENGINEERS MARK SET IN
HV0556''CEMENT IN A DRILL HOLE IN THE SOLID LEDGE.
HV0556''
HV0556''REFERENCE MARK NO. 1 IS A REGULAR REFERENCE MARK SET IN CEMENT
HV0556''IN A DEPRESSION IN THE LEDGE AT THE BASE OF THE BLUFF.
HV0556''
HV0556''REFERENCE MARK NO. 2 IS A PIECE OF REINFORCING STEEL SET IN A
HV0556''DRILL HOLE.
HV0556''
HV0556''WITNESS MARK NO. 1 IS A SMALL DRILL HOLE, AND WITNESS MARK NO. 2
HV0556''IS A LARGE DRILL HOLE.
HV0556
HV0556                          STATION RECOVERY (1935)
HV0556
HV0556''RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1935 (JHB)
HV0556''RECOVERED AS DESCRIBED EXCEPT THAT THE U.S.E. DISK HAS BEEN
HV0556''BROKEN OFF AND THE STATION IS MARKED BY THE SHANK OF THE TABLET
HV0556''ON THE TOP OF WHICH A CROSS (+) HAS BEEN CUT.  THE REFERENCE
HV0556''MARK WAS NOT FOUND.
HV0556''
HV0556''THE STATION APPROXIMATELY 20 FEET NE OF WHERE THE LETTERS B P R
HV0556''39 IS PAINTED ON THE SIDE OF THE CLIFF.
HV0556
HV0556                          STATION RECOVERY (1946)
HV0556
HV0556''RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1946 (JMN)
HV0556''RECOVERED AS DESCRIBED.  DESCRIPTION ADEQUATE.
HV0556
HV0556                          STATION RECOVERY (1947)
HV0556
HV0556''RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1947 (RMB)
HV0556''A NEW DESCRIPTION FOLLOWS--STATION
HV0556''IS SITUATED ON A PROMINENT ROCK LEDGE ABOUT 1/2 MILE SE OF
HV0556''CHAIN BRIDGE ON THE VIRGINIA BANK OF THE POTOMAC RIVER.  IT IS
HV0556''ABOUT 15 FEET FROM THE EDGE OF THE RIVER AND ABOUT 15 FEET FROM
HV0556''THE BASE OF A ROCK BLUFF.  IT IS 12 FEET ABOVE THE NORMAL RIVER
HV0556''LEVEL.  STATION IS ABOUT 1/4 MILE NW OF A SMALL CREEK KNOWN
HV0556''AS DONALDSON RUN.  IT IS MARKED BY A CROSS CUT IN THE TOP OF
HV0556''A COPPER SHANK FROM WHICH THE ORIGINAL U.S.E. DISK WAS
HV0556''APPARENTLY REMOVED.
HV0556''
HV0556''WITNESS MARK 1 IS A SMALL DRILL HOLE 7.88 FEET SW OF THE
HV0556''STATION.
HV0556''
HV0556''WITNESS MARK 2 IS A LARGE DRILL HOLE 8.48 FEET W OF THE STATION.
HV0556''
HV0556''NONE OF THE ORIGINAL REFERENCE MARKS WERE RECOVERED.