AI4538 ***********************************************************************
AI4538  DESIGNATION -  BOR 20
AI4538  PID         -  AI4538
AI4538  STATE/COUNTY-  CA/SAN DIEGO
AI4538  USGS QUAD   -  EARTHQUAKE VALLEY (1959)
AI4538
AI4538                         *CURRENT SURVEY CONTROL
AI4538  ___________________________________________________________________
AI4538* NAD 83(1986)-  33 06 00.     (N)    116 27 54.     (W)     SCALED
AI4538* NAVD 88     -       688.398  (meters)    2258.52   (feet)  ADJUSTED
AI4538  ___________________________________________________________________
AI4538  GEOID HEIGHT-         -32.06  (meters)                     GEOID99
AI4538  DYNAMIC HT  -         687.539 (meters)    2255.70  (feet)  COMP
AI4538  MODELED GRAV-     979,366.2   (mgal)                       NAVD 88
AI4538
AI4538  VERT ORDER  -  THIRD
AI4538
AI4538.The horizontal coordinates were scaled from a topographic map and have
AI4538.an estimated accuracy of +/- 6 seconds.
AI4538
AI4538.The orthometric height was determined by differential leveling
AI4538.and adjusted by the National Geodetic Survey in May 2000.
AI4538
AI4538.The geoid height was determined by GEOID99.
AI4538
AI4538.The dynamic height is computed by dividing the NAVD 88
AI4538.geopotential number by the normal gravity value computed on the
AI4538.Geodetic Reference System of 1980 (GRS 80) ellipsoid at 45
AI4538.degrees latitude (G = 980.6199 gals.).
AI4538
AI4538.The modeled gravity was interpolated from observed gravity values.
AI4538
AI4538;                    North         East    Units  Estimated Accuracy
AI4538;SPC CA 6     -   603,530.    1,979,930.      MT  (+/- 180 meters Scaled)
AI4538
AI4538                          SUPERSEDED SURVEY CONTROL
AI4538
AI4538.No superseded survey control is available for this station.
AI4538
AI4538_MARKER: DD = SURVEY DISK
AI4538_SETTING: 7 = SET IN TOP OF CONCRETE MONUMENT
AI4538_STAMPING: BOR 20 1968
AI4538_MAGNETIC: N = NO MAGNETIC MATERIAL
AI4538_STABILITY: C = MAY HOLD, BUT OF TYPE COMMONLY SUBJECT TO
AI4538+STABILITY: SURFACE MOTION
AI4538_SATELLITE: THE SITE LOCATION WAS REPORTED AS SUITABLE FOR
AI4538+SATELLITE: SATELLITE OBSERVATIONS - May 09, 1995
AI4538
AI4538  HISTORY     - Date     Condition        Recov. By
AI4538  HISTORY     - 1968     MONUMENTED       CA-073
AI4538  HISTORY     - 19950509 GOOD             CADT
AI4538
AI4538                          STATION DESCRIPTION
AI4538
AI4538''DESCRIBED BY CALTRANS 1995 (ATD)
AI4538''THE STATION IS LOCATED 8.0 MI (12.9 KM) EAST OF JULIAN, NEAR THE
AI4538''JUCTION OF STATE ROUTE 78 AND COUNTY RTE S-2, ON THE SOUTH SIDE OF
AI4538''ROUTE 78 AT POST MILE 70.4. TO REACH FROM THE JUNCTION OF STATE ROUTE
AI4538''78 AND COUNTY ROUTE S-2, KNOWN LOCALLY AS SCISSORS CROSSING, DRIVE
AI4538''EAST ON 78 FOR 0.7 MI (1.1 KM) TO THE STATION ON THE RIGHT, SOUTH. THE
AI4538''STATION MARK IS 39.5 FT (12.0 M) SOUTH OF CENTERLINE HWY 78, 4 FT (1.2
AI4538''M) WEST OF A WOOD FENCE POST, 2 FT (0.6 M) SOUTHWEST OF A METAL
AI4538''WITNESS POST, 1.5 FT (0.5 M) NORTH OF A BARBED WIRE FENCE, ABOUT 0.2
AI4538''FT (6.1 CM) LOWER THAN ROAD. THE STATION WAS LEVELED TO BY CADT AS A
AI4538''PART OF THE 1995 PERIPHERAL RUN IN SAN DIEGO COUNTY TO ESTABLISH NAVD
AI4538''1988.