Skip to Content

Details for Benchmark: DX3145

N 33° 55.100 W 117° 53.950 (NAD 83)

Altitude: 368.8

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

Location:
In ORANGE county, CA View Original Datasheet
Designation:
C 425
Marker Type:
bench mark disk
Setting:
set into the top of a round concrete monument
Stability:
May hold, but of type commonly subject to surface motion.

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)

01/01/1935 by CGS (MONUMENTED)
01/01/1955 by NGS (GOOD)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1955 IN BREA. AT THE INTERSECTION OF SOUTH POMONA AVENUE AND EAST BIRCH STREET, 25 YARDS EAST OF THE FIRST NATIONAL BANK BUILDING, 15 FEET SOUTH OF THE EAST BIRCH STREET CURB, 4 FEET SOUTH OF THE SIDEWALK, 1 FOOT EAST OF THE PONOMA AVENUE CURB, 6 FEET WEST OF THE SIDEWALK, AND 2 INCHES BELOW THE GROUND.
01/01/1964 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1964 RECOVERED IN GOOD CONDITION.
06/06/1998 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1998 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  • The NAVD 88 height was computed by applying the VERTCON shift value to the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.) The vertical order pertains to the superseded datum.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