GR0585 ***********************************************************************
GR0585  DESIGNATION -  B
GR0585  PID         -  GR0585
GR0585  STATE/COUNTY-  NV/CLARK
GR0585  USGS QUAD   -  HOOVER DAM (1984)
GR0585
GR0585                         *CURRENT SURVEY CONTROL
GR0585  ___________________________________________________________________
GR0585* NAD 83(1986)-  36 00 58.     (N)    114 44 13.     (W)     SCALED
GR0585* NAVD 88     -       376.400  (meters)    1234.91   (feet)  ADJUSTED
GR0585  ___________________________________________________________________
GR0585  GEOID HEIGHT-         -28.26  (meters)                     GEOID99
GR0585  DYNAMIC HT  -         376.031 (meters)    1233.69  (feet)  COMP
GR0585  MODELED GRAV-     979,643.1   (mgal)                       NAVD 88
GR0585
GR0585  VERT ORDER  -  FIRST     CLASS I
GR0585
GR0585.The horizontal coordinates were scaled from a topographic map and have
GR0585.an estimated accuracy of +/- 6 seconds.
GR0585
GR0585.The orthometric height was determined by differential leveling
GR0585.and adjusted by the National Geodetic Survey in June 1991.
GR0585
GR0585.The geoid height was determined by GEOID99.
GR0585
GR0585.The dynamic height is computed by dividing the NAVD 88
GR0585.geopotential number by the normal gravity value computed on the
GR0585.Geodetic Reference System of 1980 (GRS 80) ellipsoid at 45
GR0585.degrees latitude (G = 980.6199 gals.).
GR0585
GR0585.The modeled gravity was interpolated from observed gravity values.
GR0585
GR0585;                    North         East    Units  Estimated Accuracy
GR0585;SPC NV E     - 8,140,790.      276,290.      MT  (+/- 180 meters Scaled)
GR0585
GR0585                          SUPERSEDED SURVEY CONTROL
GR0585
GR0585  NGVD 29     -       375.682  (m)         1232.55   (f) ADJ UNCH    1 1
GR0585
GR0585.Superseded values are not recommended for survey control.
GR0585.NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums.
GR0585.See file dsdata.txt to determine how the superseded data were derived.
GR0585
GR0585_MARKER: DS = TRIANGULATION STATION DISK
GR0585_SETTING: 30 = SIDEWALK
GR0585_STAMPING: B 1935
GR0585_STABILITY: D = MARK OF QUESTIONABLE OR UNKNOWN STABILITY
GR0585
GR0585  HISTORY     - Date     Condition        Recov. By
GR0585  HISTORY     - 1935     MONUMENTED       CGS
GR0585  HISTORY     - 1950     GOOD             NGS
GR0585  HISTORY     - 1963     GOOD             NGS
GR0585  HISTORY     - 1981     GOOD             NGS
GR0585  HISTORY     - 1990     GOOD             USPSQD
GR0585  HISTORY     - 19961102 GOOD             USPSQD
GR0585
GR0585                          STATION DESCRIPTION
GR0585
GR0585''DESCRIBED BY NATIONAL GEODETIC SURVEY 1950
GR0585''IN HOOVER DAM.
GR0585''ON TOP OF HOOVER DAM, 0.6 FOOT NORTHWEST OF THE CENTER, ABOUT MIDWAY
GR0585''BETWEEN THE ELEVATOR TOWERS, 3.4 FEET SOUTHEAST OF THE SOUTHEAST EDGE
GR0585''OF BLOCK K, IN THE TOP OF THE NORTHEAST (UPSTREAM) SIDEWALK, AND 2.4
GR0585''FEET SOUTHWEST OF THE NORTHEAST GUARD RAIL.
GR0585
GR0585                          STATION RECOVERY (1963)
GR0585
GR0585''RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1963
GR0585''RECOVERED IN GOOD CONDITION.
GR0585
GR0585                          STATION RECOVERY (1981)
GR0585
GR0585''RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1981
GR0585''RECOVERED IN GOOD CONDITION.
GR0585
GR0585                          STATION RECOVERY (1990)
GR0585
GR0585''RECOVERY NOTE BY US POWER SQUADRON 1990 (MG)
GR0585''RECOVERED IN GOOD CONDITION.
GR0585
GR0585                          STATION RECOVERY (1996)
GR0585
GR0585''RECOVERY NOTE BY US POWER SQUADRON 1996
GR0585''RECOVERED IN GOOD CONDITION.