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Details for Benchmark: HS3232

N 37° 18.433 W 121° 53.050 (NAD 83)

Altitude: 121.6

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

Location:
In SANTA CLARA county, CA View Original Datasheet
Designation:
X 176
Marker Type:
bench mark disk
Setting:
massive structures
Stability:
Probably hold position/elevation well.

Must Read!

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I'd confirmed a while ago via google earth that the rail bridge was still intact so while driving by today I figured it was worth a look. A simple walk down the path resulted in an easy find of this disk as described. The disk stamping is not very legible but you can discern the X 176 and 193x stamping.

[This entry was edited by bullit on Saturday, October 07, 2006 at 11:11:33 PM.]

[Photos:]
photoHS3232
photoClose up of disk area
photoVicinity
photoDisk stamping

Documented History (by the NGS)

01/01/1934 by CGS (MONUMENTED)
01/01/1954 by NGS (GOOD)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1954 AT SAN JOSE. AT SAN JOSE, 2.0 MILES SOUTHEAST ALONG THE SOUTHERN PACIFIC COMPANY RAILROAD FROM THE STATION, THENCE 0.15 MILE WEST ALONG THE WESTERN PACIFIC RAILROAD, IN THE WILLOW GLEN DISTRICT, AT A BRIDGE OVER GUADALUPE RIVER, IN THE TOP OF THE SOUTH END OF THE CONCRETE ABUTMENT, 12.4 FEET SOUTH OF THE SOUTH RAIL, AND ABOUT 1 1/2 FEET LOWER THAN THE TRACK.
01/01/1967 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1967 RECOVERED IN GOOD CONDITION.
08/05/1995 by USPSQD (MARK NOT FOUND)
RECOVERY NOTE BY US POWER SQUADRON 1995 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  • The NAVD 88 height was computed by applying the VERTCON shift value to the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.) The vertical order pertains to the superseded datum.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.