AI7613 ***********************************************************************
AI7613  DESIGNATION -  A 513
AI7613  PID         -  AI7613
AI7613  STATE/COUNTY-  VA/C OF ALEXANDRIA
AI7613  USGS QUAD   -  ALEXANDRIA (1994)
AI7613
AI7613                         *CURRENT SURVEY CONTROL
AI7613  ___________________________________________________________________
AI7613* NAD 83(1986)-  38 49 53.     (N)    077 02 30.     (W)     SCALED
AI7613* NAVD 88     -         1.373  (meters)       4.50   (feet)  ADJUSTED
AI7613  ___________________________________________________________________
AI7613  GEOID HEIGHT-         -32.13  (meters)                     GEOID99
AI7613  DYNAMIC HT  -           1.372 (meters)       4.50  (feet)  COMP
AI7613  MODELED GRAV-     980,093.1   (mgal)                       NAVD 88
AI7613
AI7613  VERT ORDER  -  FIRST     CLASS II
AI7613
AI7613.The horizontal coordinates were scaled from a topographic map and have
AI7613.an estimated accuracy of +/- 6 seconds.
AI7613
AI7613.The orthometric height was determined by differential leveling
AI7613.and adjusted by the National Geodetic Survey in November 2000.
AI7613
AI7613.The geoid height was determined by GEOID99.
AI7613
AI7613.The dynamic height is computed by dividing the NAVD 88
AI7613.geopotential number by the normal gravity value computed on the
AI7613.Geodetic Reference System of 1980 (GRS 80) ellipsoid at 45
AI7613.degrees latitude (g = 980.6199 gals.).
AI7613
AI7613.The modeled gravity was interpolated from observed gravity values.
AI7613
AI7613;                    North         East    Units  Estimated Accuracy
AI7613;SPC VA N     - 2,130,290.    3,626,620.      MT  (+/- 180 meters Scaled)
AI7613
AI7613                          SUPERSEDED SURVEY CONTROL
AI7613
AI7613.No superseded survey control is available for this station.
AI7613
AI7613_MARKER: DV = VERTICAL CONTROL DISK
AI7613_SETTING: 35 = ABANDONED FLAG BASE
AI7613_STAMPING: A 513 2000
AI7613_MAGNETIC: N = NO MAGNETIC MATERIAL
AI7613_STABILITY: C = MAY HOLD, BUT OF TYPE COMMONLY SUBJECT TO
AI7613+STABILITY: SURFACE MOTION
AI7613
AI7613  HISTORY     - Date     Condition        Recov. By
AI7613  HISTORY     - 2000     MONUMENTED       NGS
AI7613
AI7613                          STATION DESCRIPTION
AI7613
AI7613''DESCRIBED BY NATIONAL GEODETIC SURVEY 2000 (DBC)
AI7613''0.6 MILE (1.0 KM) NORTH ALONG THE G W PARKWAY FROM THE JUNCTION OF
AI7613''SLATERS LANE IN ALEXANDRIA TO THE JUNCTION OF MARINA DRIVE.  THENCE
AI7613''0.05 MILE (0.08 KM) EAST ALONG MARINA DRIVE LEADING INTO THE
AI7613''WASHINGTON SAILING MARINA TO A Y JUNCTION, THENCE 0.1 MILE (0.2 KM)
AI7613''NORTHEAST ALONG ROAD TO JUNCTION OF PARKING AREA, THENCE 0.05 MILE
AI7613''(0.08 KM) WESTERLY TO MARK ON RIGHT.  7.0 FEET (2.1 M) SOUTH OF THE
AI7613''NORTH EDGE OF RETAINNG WALL, 6 INCHES SOUTH OF A CUT OFF STEEL FRAME
AI7613''(14 INCHES HIGH) , 36.0 FEET (11.0 M) NORTH OF APPROXIMATE CENTERLINE
AI7613''OF PARKING AREA ROAD, 45.9 FEET (14.0 M) EAST OF WEST END OF RETAIN
AI7613''WALL, 42.0 FEET (12.8 M) WEST OF EAST END OF RETAIN WALL.