HT0451 ***********************************************************************
HT0451  DESIGNATION -  AA 110
HT0451  PID         -  HT0451
HT0451  STATE/COUNTY-  CA/SAN MATEO
HT0451  USGS QUAD   -  SAN MATEO (1997)
HT0451
HT0451                         *CURRENT SURVEY CONTROL
HT0451  ___________________________________________________________________
HT0451* NAD 83(1986)-  37 33 39.     (N)    122 19 19.     (W)     SCALED
HT0451* NAVD 88     -        11.64   (+/-2cm)      38.2    (feet)  VERTCON
HT0451  ___________________________________________________________________
HT0451  GEOID HEIGHT-         -32.52  (meters)                     GEOID99
HT0451
HT0451  VERT ORDER  -  FIRST     CLASS II (See Below)
HT0451
HT0451.The horizontal coordinates were scaled from a topographic map and have
HT0451.an estimated accuracy of +/- 6 seconds.
HT0451
HT0451.The NAVD 88 height was computed by applying the VERTCON shift value to
HT0451.the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.)
HT0451.The vertical order pertains to the superseded datum.
HT0451
HT0451.The geoid height was determined by GEOID99.
HT0451
HT0451;                    North         East    Units  Estimated Accuracy
HT0451;SPC CA 3     -   619,300.    1,839,050.      MT  (+/- 180 meters Scaled)
HT0451
HT0451                          SUPERSEDED SURVEY CONTROL
HT0451
HT0451  NGVD 29     -        10.808  (m)           35.46   (f) ADJ UNCH    1 2
HT0451
HT0451.Superseded values are not recommended for survey control.
HT0451.NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums.
HT0451.See file dsdata.txt to determine how the superseded data were derived.
HT0451
HT0451_MARKER: DB = BENCH MARK DISK
HT0451_SETTING: 30 = FLAGPOLE BASE
HT0451_STAMPING: AA 110 1932
HT0451_STABILITY: D = MARK OF QUESTIONABLE OR UNKNOWN STABILITY
HT0451
HT0451  HISTORY     - Date     Condition        Recov. By
HT0451  HISTORY     - 1932     MONUMENTED       CGS
HT0451  HISTORY     - 1956     GOOD             NGS
HT0451  HISTORY     - 1972     GOOD             NGS
HT0451  HISTORY     - 1976     GOOD             NGS
HT0451
HT0451                          STATION DESCRIPTION
HT0451
HT0451''DESCRIBED BY NATIONAL GEODETIC SURVEY 1956
HT0451''AT SAN MATEO.
HT0451''AT SAN MATEO, AT CENTRAL SAN MATEO CITY PARK, ABOUT 160 YARDS
HT0451''SOUTHWEST OF THE T JUNCTION OF LAUREL AVENUE AND 7TH STREET, 400
HT0451''FEET NORTHEAST OF EL CAMINO REAL (U.S. HIGHWAY 101), IN THE TOP
HT0451''OF THE SOUTHEAST SIDE OF THE CONCRETE BASE OF A FLAGPOLE, 0.8
HT0451''FOOT SOUTHEAST OF THE SOUTHEAST SIDE OF THE IRON BASE OF THE
HT0451''FLAGPOLE, AND 0.5 FOOT HIGHER THAN THE GROUND.  NOTE-- DISK
HT0451''SLANTING, ROD WAS HELD OVER THE WORD OR BETWEEN THE WORDS FINE AND
HT0451''IMPRISONMENT DURING THE 1956 RELEVELING.
HT0451
HT0451                          STATION RECOVERY (1972)
HT0451
HT0451''RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1972
HT0451''RECOVERED IN GOOD CONDITION.
HT0451
HT0451                          STATION RECOVERY (1976)
HT0451
HT0451''RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1976
HT0451''AT SAN MATEO, AT CENTRAL SAN MATEO CITY PARK, ABOUT 160 YARDS
HT0451''SOUTHWEST OF THE T JUNCTION OF LAUREL AVENUE AND 7 TH STREET, 400 FT
HT0451''NORTHEAST OF EL CAMINO REAL (US HIGHWAY 101), IN THE TOP OF THE
HT0451''SOUTHEAST SIDE OF THE CONCRETE BASE OF A FLAG POLE, 0.8 FT SOUTHEAST
HT0451''OF THE SOUTHEAST SIDE OF THE IRON BASE OF THE FLAG POLE, NOTE DISK
HT0451''SLANTING, ROD WAS HELD OVER THE WORD -OR- BETWEEN THE WORDS  -FINE AND
HT0451''IMPRISONMENT-.