GR0592 ***********************************************************************
GR0592  DESIGNATION -  HOOVER DAM BLOCK A
GR0592  PID         -  GR0592
GR0592  STATE/COUNTY-  AZ/MOHAVE
GR0592  USGS QUAD   -  HOOVER DAM (1984)
GR0592
GR0592                         *CURRENT SURVEY CONTROL
GR0592  ___________________________________________________________________
GR0592* NAD 83(1986)-  36 00 53.     (N)    114 44 12.     (W)     SCALED
GR0592* NAVD 88     -       376.397  (meters)    1234.90   (feet)  ADJUSTED
GR0592  ___________________________________________________________________
GR0592  GEOID HEIGHT-         -28.26  (meters)                     GEOID99
GR0592  DYNAMIC HT  -         376.028 (meters)    1233.69  (feet)  COMP
GR0592  MODELED GRAV-     979,642.4   (mgal)                       NAVD 88
GR0592
GR0592  VERT ORDER  -  FIRST     CLASS I
GR0592
GR0592.The horizontal coordinates were scaled from a topographic map and have
GR0592.an estimated accuracy of +/- 6 seconds.
GR0592
GR0592.The orthometric height was determined by differential leveling
GR0592.and adjusted by the National Geodetic Survey in June 1991.
GR0592
GR0592.The geoid height was determined by GEOID99.
GR0592
GR0592.The dynamic height is computed by dividing the NAVD 88
GR0592.geopotential number by the normal gravity value computed on the
GR0592.Geodetic Reference System of 1980 (GRS 80) ellipsoid at 45
GR0592.degrees latitude (G = 980.6199 gals.).
GR0592
GR0592.The modeled gravity was interpolated from observed gravity values.
GR0592
GR0592;                    North         East    Units  Estimated Accuracy
GR0592;SPC AZ W     -   556,620.      124,420.      MT  (+/- 180 meters Scaled)
GR0592
GR0592                          SUPERSEDED SURVEY CONTROL
GR0592
GR0592.No superseded survey control is available for this station.
GR0592
GR0592_MARKER: DS = TRIANGULATION STATION DISK
GR0592_SETTING: 30 = SIDEWALK
GR0592_STABILITY: D = MARK OF QUESTIONABLE OR UNKNOWN STABILITY
GR0592
GR0592  HISTORY     - Date     Condition        Recov. By
GR0592  HISTORY     - UNK      MONUMENTED       CGS
GR0592  HISTORY     - 1950     GOOD             NGS
GR0592  HISTORY     - 1963     GOOD             NGS
GR0592  HISTORY     - 1981     GOOD             NGS
GR0592  HISTORY     - 1990     GOOD             USPSQD
GR0592  HISTORY     - 1990     GOOD             USPSQD
GR0592
GR0592                          STATION DESCRIPTION
GR0592
GR0592''DESCRIBED BY NATIONAL GEODETIC SURVEY 1950
GR0592''IN HOOVER DAM.
GR0592''ON TOP OF HOOVER DAM, 49.3 FEET NORTH OF THE SOUTHEAST (ARIZONA) END,
GR0592''9.3 FEET SOUTH OF THE NORTHEAST CORNER OF BLOCK A, IN THE TOP OF THE
GR0592''EAST (UP-STREAM) CONCRETE SIDEWALK, 1.6 FEET EAST OF THE WEST EDGE,
GR0592''AND 2.3 FEET WEST OF THE EAST GUARD RAIL.
GR0592
GR0592                          STATION RECOVERY (1963)
GR0592
GR0592''RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1963
GR0592''RECOVERED IN GOOD CONDITION.
GR0592
GR0592                          STATION RECOVERY (1981)
GR0592
GR0592''RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1981
GR0592''RECOVERED IN GOOD CONDITION. THIS DISK UNSTAMPED.
GR0592
GR0592                          STATION RECOVERY (1990)
GR0592
GR0592''RECOVERY NOTE BY US POWER SQUADRON 1990 (MG)
GR0592''RECOVERED IN GOOD CONDITION.
GR0592
GR0592                          STATION RECOVERY (1990)
GR0592
GR0592''RECOVERY NOTE BY US POWER SQUADRON 1990 (GG)
GR0592''RECOVERED IN GOOD CONDITION.