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Details for Benchmark: DX3269

N 33° 56.133 W 117° 53.550 (NAD 83)

Altitude: 392.9

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

Location:
In ORANGE county, CA View Original Datasheet
Designation:
G 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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Recovered as described. Condition poor, foundation has been moved.

Edit 5-3-06: Thought about it, went back and looked at it again. Foundation not just moved, but broken off underground, and likely moved at least several feet. Revising log to destroyed. Useless (or worse) for survey purposes. Will submit to NGS as destroyed also.

[This entry was edited by Klemmer & TeddyBearMama on Wednesday, May 03, 2006 at 8:13:54 AM.]

[Photos:]
photoDX3269 disc near Brea CA
photoDX3269 mount near Brea CA

Documented History (by the NGS)

1/1/1935 by CGS (MONUMENTED)
1/1/1949 by NGS (GOOD)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1949 1.2 MI NE FROM BREA. ABOUT 0.8 MILES NORTHEAST ALONG THE BREA CANYON ROAD FROM THE GRAMMAR SCHOOL AT THE NORTH EDGE OF BREA. A 6 INCH SQUARE CONCRETE POST PROJECTING 8 INCHES WHICH IS 23.5 FEET NORTHWEST OF HIGHWAY CENTER AND 20.3 FEET NORTHEAST OF THE CENTER OF NORTHWEST HEAD WALL OF CULVERT MI 0.31.
1/1/1974 by CA-059 (GOOD)
RECOVERY NOTE BY ORANGE COUNTY CALIFORNIA 1974 RECOVERED IN GOOD CONDITION.
1/1/1983 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1983 1.3 KM (0.8 MI) NORTH OF THE BREA GRAMMAR SCHOOL ALONG THE NORTHWEST SIDE OF BREA BOULEVARD, 23.5 FEET FROM CENTER, 20.7 FEET NORTHEAST OF THE CENTER OF A CULVERT HEADWALL, NEAR THE INTERSECTION OF CANNON COUNTY ROAD, FLUSH WITH THE SURFACE, A 6 INCH POST.
6/6/1998 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  • The NAVD 88 height was computed by applying the VERTCON shift value to the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.) The vertical order pertains to the superseded datum.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.

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