Skip to Content

Details for Benchmark: HS3973

N 37° 42.633 W 121° 52.800 (NAD 83)

Altitude: 370.4

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

Location:
In ALAMEDA county, CA View Original Datasheet
Designation:
P 17
Marker Type:
bench mark disk
Setting:
copper-clad steel rod
Stability:
Probably hold position/elevation well.

Must Read!

Benchmarks may be on private property or in dangerous locations. Obey local laws. By using the services on Geocaching.com you agree to this disclaimer.

Documented History (by the NGS)

01/01/1964 by CGS (MONUMENTED)
DESCRIBED BY COAST AND GEODETIC SURVEY 1964 AT CAMP PARKS. AT CAMP PARKS, 1.3 MILE EAST ALONG 8TH STREET FROM THE CHAPEL, THENCE 0.35 MILE SOUTH ALONG A STREET, 26 FEET EAST OF THE CENTER LINE OF THE ROAD, 215 FEET SOUTH OF THE CENTER LINE OF AN EAST-WEST STREET, 218 FEET NORTH OF THE CENTER LINE OF AN EAST-WEST STREET, 3 FEET NORTH OF A POWER LINE POLE, ABOUT 3 FEET LOWER THAN THE ROAD, A DISK ON THE TOP OF A 5/8-INCH COPPER COATED ROD DRIVEN TO A DEPTH OF 64 FEET. THE UPPER PORTION OF THE ROD IS ENCASED IN A CONCRETE POST PROJECTING 0.1 FOOT ABOVE THE GROUND.
01/01/1965 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1965 RECOVERED IN GOOD CONDITION.
01/01/1974 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1974 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  • The NAVD 88 height was computed by applying the VERTCON shift value to the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.) The vertical order pertains to the superseded datum.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.

Advertising with Us

Return to the Top of the Page