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Details for Benchmark: DU1004

N 33° 14.267 W 111° 56.067 (NAD 83)

Altitude: 1160

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

Location:
In MARICOPA county, AZ View Original Datasheet
Designation:
F 414
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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Found in good shape, as described.

[Photos:]
photoDU1004
photoDU1004 WP

Recovered as described, in good condition.

[Photos:]
photoF 414 / DU1004
A close-up of the mark, with the GPSr.
photoF 414 / DU1004
A close-up of the mark alone.
photoF 414 / DU1004
A wider view of the general area, looking southeast along the freeway.

Documented History (by the NGS)

01/01/1962 by CGS (MONUMENTED)
DESCRIBED BY COAST AND GEODETIC SURVEY 1962 12.4 MI SW FROM CHANDLER. 7.1 MILES WEST ALONG A CONCRETE PAVED ROAD FROM THE SOUTHERN PACIFIC CO. RAILROAD CROSSING OF CLEVELAND AVENUE AT CHANDLER, THENCE 1.8 MILES SOUTHWEST ALONG AN ASPHALT PAVED ROAD, THENCE 3.5 MILES SOUTHEAST ALONG A TRACK ROAD WHICH IS THE PROPOSED CENTER OF THE MEDIAN STRIP OF INTERSTATE HIGHWAY 10, 10 FEET NORTHEAST OF THE CENTER OF THE TRACK ROAD, 2.0 FEET SOUTHEAST OF A METAL WITNESS POST, AND SET IN TOP OF A CONCRETE POST PROJECTING 2 INCHES.

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  • The NAVD 88 height was computed by applying the VERTCON shift value to the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.) The vertical order pertains to the superseded datum.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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