AI7208 ***********************************************************************
AI7208  DESIGNATION -  BOUNDARY WITNESS MK 12 DC VA RM 4
AI7208  PID         -  AI7208
AI7208  STATE/COUNTY-  VA/C OF ALEXANDRIA
AI7208  USGS QUAD   -  ALEXANDRIA (1994)
AI7208
AI7208                         *CURRENT SURVEY CONTROL
AI7208  ___________________________________________________________________
AI7208* NAD 83(1986)-  38 49 55.     (N)    077 02 23.     (W)     SCALED
AI7208* NAVD 88     -         1.884  (meters)       6.18   (feet)  ADJUSTED
AI7208  ___________________________________________________________________
AI7208  GEOID HEIGHT-         -32.14  (meters)                     GEOID99
AI7208  DYNAMIC HT  -           1.883 (meters)       6.18  (feet)  COMP
AI7208  MODELED GRAV-     980,093.0   (mgal)                       NAVD 88
AI7208
AI7208  VERT ORDER  -  FIRST     CLASS II
AI7208
AI7208.The horizontal coordinates were scaled from a topographic map and have
AI7208.an estimated accuracy of +/- 6 seconds.
AI7208
AI7208.The orthometric height was determined by differential leveling
AI7208.and adjusted by the National Geodetic Survey in November 2000.
AI7208.No vertical observational check was made to the station.
AI7208
AI7208.The geoid height was determined by GEOID99.
AI7208
AI7208.The dynamic height is computed by dividing the NAVD 88
AI7208.geopotential number by the normal gravity value computed on the
AI7208.Geodetic Reference System of 1980 (GRS 80) ellipsoid at 45
AI7208.degrees latitude (g = 980.6199 gals.).
AI7208
AI7208.The modeled gravity was interpolated from observed gravity values.
AI7208
AI7208;                    North         East    Units  Estimated Accuracy
AI7208;SPC VA N     - 2,130,350.    3,626,790.      MT  (+/- 180 meters Scaled)
AI7208
AI7208                          SUPERSEDED SURVEY CONTROL
AI7208
AI7208.No superseded survey control is available for this station.
AI7208
AI7208_MARKER: DR = REFERENCE MARK DISK
AI7208_SETTING: 7 = SET IN TOP OF CONCRETE MONUMENT
AI7208_STAMPING: DC VA BOUNDARY NO 4 1946 1965
AI7208_MAGNETIC: N = NO MAGNETIC MATERIAL
AI7208_STABILITY: C = MAY HOLD, BUT OF TYPE COMMONLY SUBJECT TO
AI7208+STABILITY: SURFACE MOTION
AI7208
AI7208  HISTORY     - Date     Condition        Recov. By
AI7208  HISTORY     - 1965     MONUMENTED       CGS
AI7208  HISTORY     - 20000801 GOOD             NGS
AI7208
AI7208                          STATION DESCRIPTION
AI7208
AI7208''DESCRIBED BY NATIONAL GEODETIC SURVEY 2000 (RWA)
AI7208''0.6 MILE (1.0 KM) NORTH ALONG G W PARKWAY FROM THE JUNCTION OF SLATERS
AI7208''LANE IN ALEXANDRIA TO THE JUNCTION OF MARINA DRIVE FOR THE WASHINGTON
AI7208''SAILING MARINA, THENCE 0.05 MILE (0.08 KM) EAST ALONG MARINA DRIVE TO
AI7208''A Y JUNCTION, THENCE LEFT 0.2 MILE (0.3 KM) NORTHEAST ALONG PAVED ROAD
AI7208''TO A T JUNCTION AND SECURITY GATE, THENCE 0.1 MILE (0.2 KM) EAST TO A
AI7208''T JUNCTION, THENCE LEFT (NORTH) FOR 0.05 MILE (0.08 KM) ALONG PAVED
AI7208''ROAD TO MARK ON LEFT, AT A BULLENTIN BOARD WITH TRASH BARRELS ON EACH
AI7208''SIDE, AND MARK IS UNDER THE EAST ONE OF THE TWO, LIFT TRASH BARREL OUT
AI7208''OF A WOODEN SUPPORTNG BARREL HOLDER, 63.0 FEET (19.2 M) NORTH OF LAMP
AI7208''POST, 116.4 FEET (35.5 M) SOUTHWEST OF THE WEST ONE OF THREE BOAT
AI7208''HOISTS, 69.0 FEET (21.0 M) WEST OF STATION NO 12, 66.9 FEET (20.4 M)
AI7208''NORTHWEST OF RM 3 AND 3 FEET (0.9 M) SOUTHWEST OF EDGE OF PARKING LOT.