GR0588 ***********************************************************************
GR0588  DESIGNATION -  C
GR0588  PID         -  GR0588
GR0588  STATE/COUNTY-  AZ/MOHAVE
GR0588  USGS QUAD   -  HOOVER DAM (1984)
GR0588
GR0588                         *CURRENT SURVEY CONTROL
GR0588  ___________________________________________________________________
GR0588* NAD 83(1986)-  36 00 55.     (N)    114 44 11.     (W)     SCALED
GR0588* NAVD 88     -       376.402  (meters)    1234.91   (feet)  ADJUSTED
GR0588  ___________________________________________________________________
GR0588  GEOID HEIGHT-         -28.26  (meters)                     GEOID99
GR0588  DYNAMIC HT  -         376.033 (meters)    1233.70  (feet)  COMP
GR0588  MODELED GRAV-     979,642.5   (mgal)                       NAVD 88
GR0588
GR0588  VERT ORDER  -  FIRST     CLASS I
GR0588
GR0588.The horizontal coordinates were scaled from a topographic map and have
GR0588.an estimated accuracy of +/- 6 seconds.
GR0588
GR0588.The orthometric height was determined by differential leveling
GR0588.and adjusted by the National Geodetic Survey in June 1991.
GR0588
GR0588.The geoid height was determined by GEOID99.
GR0588
GR0588.The dynamic height is computed by dividing the NAVD 88
GR0588.geopotential number by the normal gravity value computed on the
GR0588.Geodetic Reference System of 1980 (GRS 80) ellipsoid at 45
GR0588.degrees latitude (G = 980.6199 gals.).
GR0588
GR0588.The modeled gravity was interpolated from observed gravity values.
GR0588
GR0588;                    North         East    Units  Estimated Accuracy
GR0588;SPC AZ W     -   556,680.      124,450.      MT  (+/- 180 meters Scaled)
GR0588
GR0588                          SUPERSEDED SURVEY CONTROL
GR0588
GR0588  NGVD 29     -       375.685  (m)         1232.56   (f) ADJ UNCH    1 1
GR0588
GR0588.Superseded values are not recommended for survey control.
GR0588.NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums.
GR0588.See file dsdata.txt to determine how the superseded data were derived.
GR0588
GR0588_MARKER: DS = TRIANGULATION STATION DISK
GR0588_SETTING: 30 = SIDEWALK
GR0588_STAMPING: C 1935
GR0588_STABILITY: D = MARK OF QUESTIONABLE OR UNKNOWN STABILITY
GR0588
GR0588  HISTORY     - Date     Condition        Recov. By
GR0588  HISTORY     - 1935     MONUMENTED       CGS
GR0588  HISTORY     - 1950     GOOD             NGS
GR0588  HISTORY     - 1963     GOOD             NGS
GR0588  HISTORY     - 1981     GOOD             NGS
GR0588  HISTORY     - 1990     GOOD             USPSQD
GR0588  HISTORY     - 1990     GOOD             USPSQD
GR0588
GR0588                          STATION DESCRIPTION
GR0588
GR0588''DESCRIBED BY NATIONAL GEODETIC SURVEY 1950
GR0588''IN HOOVER DAM.
GR0588''ON TOP OF HOOVER DAM, ABOUT 100 YARDS SOUTHEAST OF THE CENTER, ABOUT
GR0588''105 YARDS NORTH OF THE SOUTHEAST (ARIZONA) END, NEAR THE NORTHEAST
GR0588''CORNER OF BLOCK E, 2.5 FEET NORTH OF THE NORTH EDGE OF A CONCRETE
GR0588''BRIDGE TO THE ARIZONA INTAKE TOWERS, IN THE TOP OF THE EAST CONCRETE
GR0588''SIDEWALK, AND 2.0 FEET WEST OF THE EAST CONCRETE GUARD RAIL.
GR0588
GR0588                          STATION RECOVERY (1963)
GR0588
GR0588''RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1963
GR0588''RECOVERED IN GOOD CONDITION.
GR0588
GR0588                          STATION RECOVERY (1981)
GR0588
GR0588''RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1981
GR0588''RECOVERED IN GOOD CONDITION.
GR0588
GR0588                          STATION RECOVERY (1990)
GR0588
GR0588''RECOVERY NOTE BY US POWER SQUADRON 1990 (MG)
GR0588''RECOVERED IN GOOD CONDITION.
GR0588
GR0588                          STATION RECOVERY (1990)
GR0588
GR0588''RECOVERY NOTE BY US POWER SQUADRON 1990 (GG)
GR0588''RECOVERED IN GOOD CONDITION.