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Details for Benchmark: DY0804

N 33° 49.883 W 118° 03.800 (NAD 83)

Altitude: 44.69

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

Location:
In ORANGE county, CA View Original Datasheet
Designation:
CC 12
Marker Type:
survey disk
Setting:
abutments and piers of large bridges
Stability:
Probably hold position/elevation well.

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Found this one right after finding Blue Cheese Amongst Allota Cheddar (GC19BR0) so it was a 3-fer!

found this baby, the cords were a little off but still found it at 5:00 am

[Photos:]
photoPicture 002.jpg

Recovered as described.

[Photos:]
photoCloseup of DY0804 (CC 12) disc
Near Cypress CA
photoDY08904 area view
LA concrete river with water! Only a couple times a year or so.

Been There. About 80 feet south of DY0803.

[Photos:]
photoCC12
Survey Disc

Documented History (by the NGS)

01/01/1958 by DOD (MONUMENTED)
01/01/1968 by CA-059 (GOOD)
DESCRIBED BY ORANGE COUNTY CALIFORNIA 1968 IN CYPRESS. 160 FEET EAST ALONG LINCOLN AVENUE FROM ITS INTERSECTION WITH BLOOMFIELD AVENUE TO THE OVERCROSSING OF COYOTE CREEK, 40 FEET SOUTH OF THE CENTER OF THE LINCOLN AVENUE TRAFFIC MEDIAN, 6 FEET EAST OF THE SOUTHWEST CORNER OF BRIDGE 55-147, 1.0 FOOT SOUTH OF THE SOUTH EDGE OF THE BRIDGE, 0.3 FOOT NORTH OF A STEEL POST, IN THE TOP OF AND AT THE HINGE POINT OF THE CONCRETE BRIDGE ABUTMENT, ABOUT 1.0 FOOT BELOW THE ROAD.
01/01/1974 by CA-059 (GOOD)
RECOVERY NOTE BY ORANGE COUNTY CALIFORNIA 1974 RECOVERED IN GOOD CONDITION.
01/01/1978 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1978 RECOVERED IN GOOD CONDITION.
08/16/1994 by CA-059 (GOOD)
RECOVERY NOTE BY ORANGE COUNTY CALIFORNIA 1994 (JK) RECOVERY NOTE BY ORANGE COUNTY CALIFORNIA 1994. RECOVERED AS DESCRIBED BY ORANGE COUNTY CALIFORNIA 1968.

Control Text

  • The horizontal coordinates were scaled from a topographic map and have an estimated accuracy of +/- 6 seconds.
  • The orthometric height was determined by differential leveling and adjusted by the National Geodetic Survey in June 1995.
  • The geoid height was determined by GEOID99.
  • The dynamic height is computed by dividing the NAVD 88 geopotential number by the normal gravity value computed on the Geodetic Reference System of 1980 (GRS 80) ellipsoid at 45 degrees latitude (G = 980.6199 gals.).
  • The modeled gravity was interpolated from observed gravity values.

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