HT0027 ***********************************************************************
HT0027  TIDAL BM    -  This is a Tidal Bench Mark.
HT0027  DESIGNATION -  T 470
HT0027  PID         -  HT0027
HT0027  STATE/COUNTY-  CA/ALAMEDA
HT0027  USGS QUAD   -  OAKLAND EAST (1997)
HT0027
HT0027                         *CURRENT SURVEY CONTROL
HT0027  ___________________________________________________________________
HT0027* NAD 83(1986)-  37 46 13.     (N)    122 14 14.     (W)     SCALED
HT0027* NAVD 88     -         3.969  (meters)      13.02   (feet)  ADJUSTED
HT0027  ___________________________________________________________________
HT0027  GEOID HEIGHT-         -32.33  (meters)                     GEOID99
HT0027  DYNAMIC HT  -           3.966 (meters)      13.01  (feet)  COMP
HT0027  MODELED GRAV-     979,966.7   (mgal)                       NAVD 88
HT0027
HT0027  VERT ORDER  -  FIRST     CLASS II
HT0027
HT0027.The horizontal coordinates were scaled from a topographic map and have
HT0027.an estimated accuracy of +/- 6 seconds.
HT0027
HT0027.The orthometric height was determined by differential leveling
HT0027.and adjusted by the National Geodetic Survey in June 1991.
HT0027
HT0027.This Tidal Bench Mark is designated as VM 7562
HT0027.by the Center for Operational Oceanographic Products and Services.
HT0027
HT0027.The geoid height was determined by GEOID99.
HT0027
HT0027.The dynamic height is computed by dividing the NAVD 88
HT0027.geopotential number by the normal gravity value computed on the
HT0027.Geodetic Reference System of 1980 (GRS 80) ellipsoid at 45
HT0027.degrees latitude (G = 980.6199 gals.).
HT0027
HT0027.The modeled gravity was interpolated from observed gravity values.
HT0027
HT0027;                    North         East    Units  Estimated Accuracy
HT0027;SPC CA 3     -   642,400.    1,846,960.      MT  (+/- 180 meters Scaled)
HT0027
HT0027                          SUPERSEDED SURVEY CONTROL
HT0027
HT0027  NGVD 29     -         3.144  (m)           10.31   (f) ADJUSTED    1 2
HT0027
HT0027.Superseded values are not recommended for survey control.
HT0027.NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums.
HT0027.See file dsdata.txt to determine how the superseded data were derived.
HT0027
HT0027_MARKER: DB = BENCH MARK DISK
HT0027_SETTING: 31 = GUARDRAIL CONCRETE BASE
HT0027_STAMPING: T 470 1951
HT0027_STABILITY: D = MARK OF QUESTIONABLE OR UNKNOWN STABILITY
HT0027_SATELLITE: THE SITE LOCATION WAS REPORTED AS SUITABLE FOR
HT0027+SATELLITE: SATELLITE OBSERVATIONS - October 11, 1988
HT0027
HT0027  HISTORY     - Date     Condition        Recov. By
HT0027  HISTORY     - 1951     MONUMENTED       CGS
HT0027  HISTORY     - 1963     GOOD             NGS
HT0027  HISTORY     - 1984     GOOD             USPSQD
HT0027  HISTORY     - 1987     GOOD             USPSQD
HT0027  HISTORY     - 19881011 GOOD             NGS
HT0027
HT0027                          STATION DESCRIPTION
HT0027
HT0027''DESCRIBED BY COAST AND GEODETIC SURVEY 1951
HT0027''AT ALAMEDA.
HT0027''AT ALAMEDA, AT THE INTERSECTION OF PARK STREET AND BLANDING
HT0027''AVENUE, AT THE SOUTHWEST END OF THE PARK STREET BRIDGE OVER THE
HT0027''CHANNEL, IN THE TOP OF THE SOUTHWEST END OF THE CONCRETE BASE
HT0027''OF THE NORTHWEST GUARD RAIL, 23.4 FEET NORTHWEST OF THE CENTER
HT0027''LINE OF PARK STREET, ABOUT 1 FOOT HIGHER THAN THE STREET.
HT0027
HT0027                          STATION RECOVERY (1963)
HT0027
HT0027''RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1963
HT0027''RECOVERED IN GOOD CONDITION.
HT0027
HT0027                          STATION RECOVERY (1984)
HT0027
HT0027''RECOVERY NOTE BY US POWER SQUADRON 1984
HT0027''RECOVERED IN GOOD CONDITION.
HT0027
HT0027                          STATION RECOVERY (1987)
HT0027
HT0027''RECOVERY NOTE BY US POWER SQUADRON 1987 (RAS)
HT0027''RECOVERED IN GOOD CONDITION.
HT0027
HT0027                          STATION RECOVERY (1988)
HT0027
HT0027''RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1988
HT0027''RECOVERED IN GOOD CONDITION.