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Details for Benchmark: DX2224

N 33° 47.967 W 117° 51.150 (NAD 83)

Altitude: 198.32

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

Location:
In ORANGE county, CA View Original Datasheet
Designation:
D 782
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. Whacked a few times with a lawn mower, but still in good condition.

[Photos:]
photoDX2224 Disc in Orange CA
photoDX2224 & Looking Southwest
View is diagonally across the intersection of Mayfair & Glassel
photoDX2224 Looking Southeast
Mark now in front of the Glassel Park Apartments

found this one by my work on the way to go get lunch. Yes I have no digital camera.
coords are:
N 33° 47.966
W 117° 51.153

Aloha and Mahalo
Moag Ohana

[last edit: 2/7/2003 7:51:19 AM PST]

Documented History (by the NGS)

1/1/1946 by CGS (MONUMENTED)
1/1/1955 by NGS (GOOD)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1955 AT ORANGE. AT ORANGE, 1.0 MILE NORTH ALONG NORTH GLASSELL STREET FROM THE PLAZA, AT THE T JUNCTION OF MAYFAIR AVENUE, IN THE FRONT YARDS OF HOMES 729 AND 731, 58.3 FEET NORTH OF THE NORTH CURB OF THE AVENUE, 23.5 FEET SOUTHWEST OF THE SOUTHWEST CORNER OF A 4- BY 4-INCH POST SUPPORTING SIGN MAYFAIR APTS., 2 FEET NORTH OF TELEPHONE POLE 404464 H, 1.6 FEET EAST OF THE EAST CURB OF THE STREET, 1.0 FOOT SOUTH OF A WITNESS POST, ABOUT LEVEL WITH THE STREET, AND SET IN THE TOP OF A CONCRETE POST PROJECTING 0.2 FOOT ABOVE THE GROUND.
1/1/1969 by CA-059 (GOOD)
RECOVERY NOTE BY ORANGE COUNTY CALIFORNIA 1969 RECOVERED IN GOOD CONDITION.
1/1/1977 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1977 RECOVERED IN GOOD CONDITION.
1/1/1988 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1988 RECOVERED IN GOOD CONDTION. THE 1977 DESCRIPTION IN L24301-16 IS ADEQUATE EXCEPT OMIT-- 23.5 FT SOUTHWEST OF THE SOUTHWEST CORNER OF A 4 BY 4 INCH POST SUPPORTING SIGN MAYFAIR APTS.

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 1991.
  • 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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