HS3012 ***********************************************************************
HS3012  DESIGNATION -  Y 591
HS3012  PID         -  HS3012
HS3012  STATE/COUNTY-  CA/SANTA CLARA
HS3012  USGS QUAD   -  MILPITAS (1980)
HS3012
HS3012                         *CURRENT SURVEY CONTROL
HS3012  ___________________________________________________________________
HS3012* NAD 83(1986)-  37 24 02.     (N)    121 57 46.     (W)     SCALED
HS3012* NAVD 88     -         5.79   (+/-2cm)      19.0    (feet)  VERTCON
HS3012  ___________________________________________________________________
HS3012  GEOID HEIGHT-         -32.60  (meters)                     GEOID99
HS3012
HS3012  VERT ORDER  -  FIRST     CLASS II (See Below)
HS3012
HS3012.The horizontal coordinates were scaled from a topographic map and have
HS3012.an estimated accuracy of +/- 6 seconds.
HS3012
HS3012.The NAVD 88 height was computed by applying the VERTCON shift value to
HS3012.the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.)
HS3012.The vertical order pertains to the superseded datum.
HS3012
HS3012.The geoid height was determined by GEOID99.
HS3012
HS3012;                    North         East    Units  Estimated Accuracy
HS3012;SPC CA 3     -   600,960.    1,870,490.      MT  (+/- 180 meters Scaled)
HS3012
HS3012                          SUPERSEDED SURVEY CONTROL
HS3012
HS3012  NGVD 29     -         4.967  (m)           16.30   (f) ADJ UNCH    1 2
HS3012
HS3012.Superseded values are not recommended for survey control.
HS3012.NGS no longer adjusts projects to the NAD 27 or NGVD 29 datums.
HS3012.See file dsdata.txt to determine how the superseded data were derived.
HS3012
HS3012_MARKER: DB = BENCH MARK DISK
HS3012_SETTING: 7 = SET IN TOP OF CONCRETE MONUMENT
HS3012_STAMPING: Y 591 1940 1950
HS3012_STABILITY: C = MAY HOLD, BUT OF TYPE COMMONLY SUBJECT TO
HS3012+STABILITY: SURFACE MOTION
HS3012
HS3012  HISTORY     - Date     Condition        Recov. By
HS3012  HISTORY     - 1950     MONUMENTED       CGS
HS3012  HISTORY     - 1954     GOOD             NGS
HS3012  HISTORY     - 1960     MARK NOT FOUND   NGS
HS3012
HS3012                          STATION DESCRIPTION
HS3012
HS3012''DESCRIBED BY NATIONAL GEODETIC SURVEY 1954
HS3012''0.5 MI NW FROM AGNEW.
HS3012''0.5 MILE NORTHWEST ALONG SANTA CLARA-ALVISO ROAD FROM THE
HS3012''SOUTHERN PACIFIC COMPANY RAILROAD STATION AT AGNEW, AT THE T
HS3012''JUNCTION OF A FARM ROAD LEADING NORTHEAST, 44.4 FEET NORTHWEST
HS3012''OF TELEPHONE POLE 93, 29.5 FEET NORTHEAST OF THE CENTER LINE OF
HS3012''SANTA CLARA-ALVISO ROAD, 11 1/2 FEET SOUTHWEST OF THE SOUTHEAST
HS3012''ONE OF TWO LARGE GUM TREES, 14.7 FEET SOUTHEAST OF THE CENTER
HS3012''LINE OF THE FARM ROAD, 1.5 FEET SOUTHEAST OF A WITNESS POST,
HS3012''ABOUT LEVEL WITH THE ROAD, 0.1 FOOT UNDERGROUND, AND SET IN THE
HS3012''TOP OF A CONCRETE POST.
HS3012
HS3012                          STATION RECOVERY (1960)
HS3012
HS3012''RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1960
HS3012''MARK NOT FOUND.