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Details for Benchmark: HS3035

N 37° 20.950 W 121° 51.700 (NAD 83)

Altitude: 98.3

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

Location:
In SANTA CLARA county, CA View Original Datasheet
Designation:
U 874
Marker Type:
bench mark disk
Setting:
light structures
Stability:
Mark of questionable or unknown stability.

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I passed a benchmark in about the right place, but this bridge was rebuilt in 1993 so I suspect it's not the correct one for this.

Documented History (by the NGS)

01/01/1954 by CGS (MONUMENTED)
DESCRIBED BY COAST AND GEODETIC SURVEY 1954 AT SAN JOSE. AT SAN JOSE, ALONG SANTA CLARA STREET, AT CONCRETE BRIDGE 37-84 OVER U.S. HIGHWAY 101 BYPASS (BAYSHORE HIGHWAY), IN THE TOP OF THE SOUTHWEST END OF THE SOUTHEAST SIDEWALK, 53.5 FEET SOUTHWEST OF LAMP POLE 436, 6.5 FEET SOUTHEAST OF THE SOUTHEAST CURB OF THE STREET, 1.1 FEET NORTHWEST OF THE STEEL GUARD RAIL, AND ABOUT 1/2 FOOT HIGHER THAN THE STREET.
01/01/1969 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1969 RECOVERED IN GOOD CONDITION.

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  • The NAVD 88 height was computed by applying the VERTCON shift value to the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.) The vertical order pertains to the superseded datum.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.

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