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Details for Benchmark: DY0803

N 33° 49.917 W 118° 03.800 (NAD 83)

Altitude: 44.83

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

Location:
In ORANGE county, CA View Original Datasheet
Designation:
CC 13
Marker Type:
survey disk
Setting:
abutments and piers of large bridges
Stability:
Probably hold position/elevation well.

Must Read!

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OUT FOR SOME BIKING AND CACHING, THOUGHT I TRY A BENCHMARK AS WELL

PIC REALLY HELPED GZ WERE OFF A LITTLE.

Found this benchmark while walking back to the car from Blue Cheese Amongst Allota Cheddar (GC19BR0)

SPotted another one

Recovered as described. A little paint spattered, but readable.

[Photos:]
photoCloseup of DX0803 (CC 13) disc
Near Cypress, CA in SoCal
photoDY0803 Disc area, near Cypress CA
A rare view of one of our LA area concrete rivers with water in it!

Been There, Saw That

[Photos:]
photoDY0803.jpg
Survey Disc

Directions are perfect. Found it with no trouble despite the fact that it is in a truly out of the way spot. Stand on the north side sidewalk at the western end and look over the railing.
Its' location also makes it a bit difficult to photograph too. It's tough to get close to it. It also has some paint splatter on it making harder to read. Oh well! Like I said, the directions are perfect.
Tigger 2

[Photos:]
photoTigger with the disk.
photoClose up of the disk.
Well, it's as close as I could get.
photoWide shot of the location.
From the riverbed access road on the west. Disk is at the center of the photo, next to the fence post base.

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 NORTH OF THE CENTER OF THE LINCOLN AVENUE TRAFFIC MEDIAN, 8 FEET EAST OF THE NORTHWEST CORNER OF BRIDGE 55-147, 1.0 FOOT NORTH OF THE NORTH EDGE OF THE BRIDGE, 0.3 FOOT SOUTH 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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