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Details for Benchmark: DX3150

N 33° 55.200 W 117° 53.800 (NAD 83)

Altitude: 358

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

Location:
In ORANGE county, CA View Original Datasheet
Designation:
Z 424
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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This one certainly looks gone. The reference to the house at 117 Orange Ave. is no longer valid because the house is now apartments. I did find a row of water meters and one of them is marked 117. The water meters are about 13 feet north a power pole, too. I would almost bet that the disk went out when the water meters came in.
And they call it "progress"??!!

Tigger 2

Documented History (by the NGS)

01/01/1935 by CGS (MONUMENTED)
01/01/1949 by NGS (GOOD)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1949 IN BREA. ON THE WEST SIDE OF NORTH ORANGE AVENUE, AT BASE OF A HILL, 26 FEET NORTHEAST OF THE NORTHEAST CORNER OF HOUSE NUMBER 117, 13 FEET NORTH OF A POWER LINE POLE AND 1.2 FEET WEST OF THE WEST CURB. A 6 INCH SQUARE CONCRETE POST PROJECTING 2 INCHES.
01/01/1967 by MWDSC (GOOD)
RECOVERY NOTE BY METRO WATER DISTR SO. CALIFORNIA 1967 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  • The NAVD 88 height was computed by applying the VERTCON shift value to the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.) The vertical order pertains to the superseded datum.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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