HV2848 ***********************************************************************
HV2848  DESIGNATION -  37 USGS
HV2848  PID         -  HV2848
HV2848  STATE/COUNTY-  VA/STAFFORD
HV2848  USGS QUAD   -  WIDEWATER (1978)
HV2848
HV2848                         *CURRENT SURVEY CONTROL
HV2848  ___________________________________________________________________
HV2848* NAD 83(1986)-  38 26 18.     (N)    077 20 15.     (W)     SCALED
HV2848* NAVD 88     -        11.033  (meters)      36.20   (feet)  ADJUSTED
HV2848  ___________________________________________________________________
HV2848  GEOID HEIGHT-         -32.48  (meters)                     GEOID99
HV2848  DYNAMIC HT  -          11.027 (meters)      36.18  (feet)  COMP
HV2848  MODELED GRAV-     980,028.5   (mgal)                       NAVD 88
HV2848  OBS GRAVITY -     980,033.8   (mgal)                       GRAV_OBS
HV2848
HV2848  VERT ORDER  -  FIRST     CLASS I
HV2848
HV2848.The horizontal coordinates were scaled from a topographic map and have
HV2848.an estimated accuracy of +/- 6 seconds.
HV2848
HV2848.The orthometric height was determined by differential leveling
HV2848.and adjusted by the National Geodetic Survey in June 1991.
HV2848
HV2848.The geoid height was determined by GEOID99.
HV2848
HV2848.The dynamic height is computed by dividing the NAVD 88
HV2848.geopotential number by the normal gravity value computed on the
HV2848.Geodetic Reference System of 1980 (GRS 80) ellipsoid at 45
HV2848.degrees latitude (g = 980.6199 gals.).
HV2848
HV2848.The modeled gravity was interpolated from observed gravity values.
HV2848.The observed gravity was obtained from relative gravimeter ties
HV2848.to the IGSN71 gravity network.
HV2848
HV2848;                    North         East    Units  Estimated Accuracy
HV2848;SPC VA N     - 2,086,300.    3,601,490.      MT  (+/- 180 meters Scaled)
HV2848
HV2848                          SUPERSEDED SURVEY CONTROL
HV2848
HV2848  NGVD 29     -        11.280  (m)           37.01   (f) ADJUSTED    1 1
HV2848
HV2848.Superseded values are not recommended for survey control.
HV2848.NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums.
HV2848.See file dsdata.txt to determine how the superseded data were derived.
HV2848
HV2848_MARKER: DD = SURVEY DISK
HV2848_SETTING: 7 = SET IN TOP OF CONCRETE MONUMENT
HV2848_STAMPING: 37 58 AFK 1964
HV2848_STABILITY: C = MAY HOLD, BUT OF TYPE COMMONLY SUBJECT TO
HV2848+STABILITY: SURFACE MOTION
HV2848
HV2848  HISTORY     - Date     Condition        Recov. By
HV2848  HISTORY     - 1964     MONUMENTED       USGS
HV2848  HISTORY     - 1971     GOOD             NGS
HV2848  HISTORY     - 1978     GOOD             DMA
HV2848
HV2848                          STATION DESCRIPTION
HV2848
HV2848''DESCRIBED BY NATIONAL GEODETIC SURVEY 1971
HV2848''6.4 MI SW FROM QUANTICO.
HV2848''ABOUT 6.45 MILES SOUTHWEST ALONG THE RICHMOND, FREDERICKSBURG
HV2848''AND POTOMAC RAILROAD FROM THE STATION AT QUANTICO, AT ARKENDALE,
HV2848''0.7 MILE SOUTHWEST OF MILEPOST 73, 28 FEET EAST OF THE CENTER
HV2848''OF THE CROSSING OF COUNTY ROAD 658, 19 FEET NORTHEAST OF THE
HV2848''CENTER LINE OF THE ROAD, 9 FEET SOUTHEAST OF THE SOUTHEAST RAIL
HV2848''OF THE SOUTHEAST TRACK, 2.0 FEET NORTHWEST OF THE NORTHWEST
HV2848''SIDE OF THE CONCRETE FOUNDATION FOR A RAILROAD SIGNAL LIGHT,
HV2848''0.9 FOOT NORTHWEST OF A METAL WITNESS POST, ABOUT 1/2 FOOT BELOW
HV2848''THE LEVEL OF THE TRACK, AND SET IN THE TOP OF A CONCRETE POST
HV2848''PROJECTING 5 INCHES.
HV2848
HV2848                          STATION RECOVERY (1978)
HV2848
HV2848''RECOVERY NOTE BY DEFENSE MAP AGENCY 1978
HV2848''RECOVERED IN GOOD CONDITION.