HW0004 ***********************************************************************
HW0004  DESIGNATION -  N 21 USGS
HW0004  PID         -  HW0004
HW0004  STATE/COUNTY-  VA/SHENANDOAH
HW0004  USGS QUAD   -  STRASBURG (1994)
HW0004
HW0004                         *CURRENT SURVEY CONTROL
HW0004  ___________________________________________________________________
HW0004* NAD 83(1986)-  38 59 14.     (N)    078 21 18.     (W)     SCALED
HW0004* NAVD 88     -       175.992  (meters)     577.40   (feet)  ADJUSTED
HW0004  ___________________________________________________________________
HW0004  GEOID HEIGHT-         -33.38  (meters)                     GEOID99
HW0004  DYNAMIC HT  -         175.879 (meters)     577.03  (feet)  COMP
HW0004  MODELED GRAV-     979,980.7   (mgal)                       NAVD 88
HW0004
HW0004  VERT ORDER  -  FIRST     CLASS II
HW0004
HW0004.The horizontal coordinates were scaled from a topographic map and have
HW0004.an estimated accuracy of +/- 6 seconds.
HW0004
HW0004.The orthometric height was determined by differential leveling
HW0004.and adjusted by the National Geodetic Survey in June 1991.
HW0004
HW0004.The geoid height was determined by GEOID99.
HW0004
HW0004.The dynamic height is computed by dividing the NAVD 88
HW0004.geopotential number by the normal gravity value computed on the
HW0004.Geodetic Reference System of 1980 (GRS 80) ellipsoid at 45
HW0004.degrees latitude (g = 980.6199 gals.).
HW0004
HW0004.The modeled gravity was interpolated from observed gravity values.
HW0004
HW0004;                    North         East    Units  Estimated Accuracy
HW0004;SPC VA N     - 2,146,590.    3,512,560.      MT  (+/- 180 meters Scaled)
HW0004
HW0004                          SUPERSEDED SURVEY CONTROL
HW0004
HW0004  NGVD 29     -       176.223  (m)          578.16   (f) ADJ UNCH    1 2
HW0004
HW0004.Superseded values are not recommended for survey control.
HW0004.NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums.
HW0004.See file dsdata.txt to determine how the superseded data were derived.
HW0004
HW0004_MARKER: DB = BENCH MARK DISK
HW0004_SETTING: 7 = SET IN TOP OF CONCRETE MONUMENT
HW0004_STAMPING: 578.214 N 21 1929
HW0004_PROJECTION: PROJECTING 1 CENTIMETERS
HW0004_STABILITY: C = MAY HOLD, BUT OF TYPE COMMONLY SUBJECT TO
HW0004+STABILITY: SURFACE MOTION
HW0004
HW0004  HISTORY     - Date     Condition        Recov. By
HW0004  HISTORY     - 1929     MONUMENTED       USGS
HW0004  HISTORY     - 1958     GOOD             NGS
HW0004  HISTORY     - 1983     GOOD             NGS
HW0004
HW0004                          STATION DESCRIPTION
HW0004
HW0004''DESCRIBED BY NATIONAL GEODETIC SURVEY 1958
HW0004''0.4 MI E FROM STRASBURG.
HW0004''ABOUT 0.4 MILE EAST ALONG STATE HIGHWAY 55 FROM THE POST OFFICE
HW0004''AT STRASBURG, NEAR THE SOUTHERN RAILWAY STATION AT STRASBURG,
HW0004''81 FEET SOUTHWEST OF THE CENTER LINE OF STATE HIGHWAY 55, 114
HW0004''FEET EAST OF THE SOUTHEAST CORNER OF THE SOUTHERN RAILWAY STATION,
HW0004''19 FEET WEST OF THE WEST RAIL OF A SPUR TRACK LEADING TO STRASBURG
HW0004''JUNCTION, 7 FEET SOUTH OF A POWER LINE POLE, ABOUT LEVEL WITH
HW0004''THE HIGHWAY AND SET IN THE TOP OF A CONCRETE POST FLUSH WITH THE
HW0004''GROUND.
HW0004
HW0004                          STATION RECOVERY (1983)
HW0004
HW0004''RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1983
HW0004''RECOVERED IN GOOD CONDITION, THE 1958 DESCRIPTION IS ADEQUATE WITH THE
HW0004''FOLLOWING CORRECTIONS, THE SOUTHERN RAILWAY STATION IS NOW A MUSEUM,
HW0004''THE MARK IS NOW 1.31 METERS (4.3 FT) SOUTH OF A TELEPHONE POLE.