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Details for Benchmark: DX3165

N 33° 55.350 W 117° 53.733 (NAD 83)

Altitude: 389.9

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

Location:
In ORANGE county, CA View Original Datasheet
Designation:
G 352
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.

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Carefully walked Brea Blvd (which used to be Pomona Avenue) from Birch Ave to north of Lambert Rd, both sides, looking for any possible marks. This one not found.

Documented History (by the NGS)

01/01/1949 by CGS (MONUMENTED)
DESCRIBED BY COAST AND GEODETIC SURVEY 1949 IN BREA. DIRECTLY ACROSS THE STREET FROM THE ENTRANCE TO 323 NORTH POMONA AVENUE, 1.8 FEET NORTH OF A DRIVEWAY CURB, 3.6 FEET EAST OF THE EAST CURB OF POMON AVENUE AND 2.3 FEET WEST OF THE WEST EDGE OF SIDEWALK. IT IS A 9 INCH SQUARE CONCRETE POST FLUSH WITH THE GROUND.
01/01/1957 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1957 RECOVERED IN GOOD CONDITION.
06/06/1998 by USPSQD (MARK NOT FOUND)
RECOVERY NOTE BY US POWER SQUADRON 1998 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  • The NAVD 88 height was computed by applying the VERTCON shift value to the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.) The vertical order pertains to the superseded datum.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.

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