GR0584 ***********************************************************************
GR0584  DESIGNATION -  H 174
GR0584  PID         -  GR0584
GR0584  STATE/COUNTY-  NV/CLARK
GR0584  USGS QUAD   -  HOOVER DAM (1984)
GR0584
GR0584                         *CURRENT SURVEY CONTROL
GR0584  ___________________________________________________________________
GR0584* NAD 83(1986)-  36 00 58.     (N)    114 44 14.     (W)     SCALED
GR0584* NAVD 88     -       376.389  (meters)    1234.87   (feet)  ADJUSTED
GR0584  ___________________________________________________________________
GR0584  GEOID HEIGHT-         -28.26  (meters)                     GEOID99
GR0584  DYNAMIC HT  -         376.021 (meters)    1233.66  (feet)  COMP
GR0584  MODELED GRAV-     979,643.2   (mgal)                       NAVD 88
GR0584
GR0584  VERT ORDER  -  FIRST     CLASS I
GR0584
GR0584.The horizontal coordinates were scaled from a topographic map and have
GR0584.an estimated accuracy of +/- 6 seconds.
GR0584
GR0584.The orthometric height was determined by differential leveling
GR0584.and adjusted by the National Geodetic Survey in June 1991.
GR0584
GR0584.The geoid height was determined by GEOID99.
GR0584
GR0584.The dynamic height is computed by dividing the NAVD 88
GR0584.geopotential number by the normal gravity value computed on the
GR0584.Geodetic Reference System of 1980 (GRS 80) ellipsoid at 45
GR0584.degrees latitude (G = 980.6199 gals.).
GR0584
GR0584.The modeled gravity was interpolated from observed gravity values.
GR0584
GR0584;                    North         East    Units  Estimated Accuracy
GR0584;SPC NV E     - 8,140,790.      276,270.      MT  (+/- 180 meters Scaled)
GR0584
GR0584                          SUPERSEDED SURVEY CONTROL
GR0584
GR0584  NGVD 29     -       375.671  (m)         1232.51   (f) ADJ UNCH    1 1
GR0584
GR0584.Superseded values are not recommended for survey control.
GR0584.NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums.
GR0584.See file dsdata.txt to determine how the superseded data were derived.
GR0584
GR0584_MARKER: DB = BENCH MARK DISK
GR0584_SETTING: 30 = SIDEWALK
GR0584_STAMPING: H 174 1935
GR0584_STABILITY: D = MARK OF QUESTIONABLE OR UNKNOWN STABILITY
GR0584
GR0584  HISTORY     - Date     Condition        Recov. By
GR0584  HISTORY     - 1935     MONUMENTED       CGS
GR0584  HISTORY     - 1950     GOOD             NGS
GR0584  HISTORY     - 1963     GOOD             NGS
GR0584  HISTORY     - 1981     GOOD             NGS
GR0584  HISTORY     - 1990     GOOD             USPSQD
GR0584  HISTORY     - 1990     GOOD             USPSQD
GR0584  HISTORY     - 19961102 GOOD             USPSQD
GR0584
GR0584                          STATION DESCRIPTION
GR0584
GR0584''DESCRIBED BY NATIONAL GEODETIC SURVEY 1950
GR0584''IN HOOVER DAM.
GR0584''ON TOP OF HOOVER DAM, 32.9 FEET NORTHWEST OF THE CENTER, NEAR THE
GR0584''CENTER OF THE NORTHEAST (UPSTREAM) SIDE OF BLOCK K, IN THE TOP OF THE
GR0584''SOUTHWEST EDGE OF THE NORTHEAST SIDEWALK, AND 3.5 FEET SOUTHWEST OF
GR0584''THE NORTHEAST CONCRETE GUARD RAIL.
GR0584
GR0584                          STATION RECOVERY (1963)
GR0584
GR0584''RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1963
GR0584''RECOVERED IN GOOD CONDITION.
GR0584
GR0584                          STATION RECOVERY (1981)
GR0584
GR0584''RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1981
GR0584''RECOVERED IN GOOD CONDITION.
GR0584
GR0584                          STATION RECOVERY (1990)
GR0584
GR0584''RECOVERY NOTE BY US POWER SQUADRON 1990 (MG)
GR0584''RECOVERED IN GOOD CONDITION.
GR0584
GR0584                          STATION RECOVERY (1990)
GR0584
GR0584''RECOVERY NOTE BY US POWER SQUADRON 1990 (GG)
GR0584''RECOVERED IN GOOD CONDITION.
GR0584
GR0584                          STATION RECOVERY (1996)
GR0584
GR0584''RECOVERY NOTE BY US POWER SQUADRON 1996
GR0584''RECOVERED IN GOOD CONDITION.