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Details for Benchmark: HS3229

N 37° 18.883 W 121° 53.317 (NAD 83)

Altitude: 113.3

Coordinates may not be exact. Altitude is VERTCON and location is SCALED. (more info)

Location:
In SANTA CLARA county, CA View Original Datasheet
Designation:
D 112
Marker Type:
bench mark disk
Setting:
massive structures
Stability:
Probably hold position/elevation well.

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RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1961 MARK NOT FOUND.

Documented History (by the NGS)

01/01/1932 by CGS (MONUMENTED)
01/01/1954 by NGS (GOOD)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1954 AT SAN JOSE. AT SAN JOSE, 1.3 MILES SOUTHEAST ALONG THE SOUTHERN PACIFIC COMPANY RAILROAD FROM THE STATION, THENCE 0.15 MILE SOUTHWEST ALONG WILLOW STREET, AT THE EAST CORNER OF THE WILLOW STREET BRIDGE OVER GUADALUPE RIVER, IN THE TOP OF THE NORTH END OF THE SOUTHEAST CONCRETE WING WALL, 21.3 FEET SOUTHEAST OF THE CENTER LINE OF THE STREET, 0.6 FOOT NORTHEAST OF THE NORTHEAST END OF THE BRIDGE, 0.7 FOOT SOUTHWEST OF THE IRON POST WHERE THE IRON HAND RAILS FORM A V, AND ABOUT LEVEL WITH THE STREET. NOTE--THIS MARK HAS PROBABLY BEEN COVERED BY WHAT APPEARS TO BE NEW CONCRETE BANNISTERS POURED OVER THE AREA OF THE OLD IRON RAILS. THIS MARK WAS SEARCHED FOR BUT NOT FOUND.
01/01/1961 by NGS (MARK NOT FOUND)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1961 MARK NOT FOUND.

Control Text

  • The horizontal coordinates were scaled from a topographic map and have an estimated accuracy of +/- 6 seconds.
  • The NAVD 88 height was computed by applying the VERTCON shift value to the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.) The vertical order pertains to the superseded datum.
  • The geoid height was determined by GEOID99.