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Details for Benchmark: DU2317

N 33° 24.933 W 111° 45.550 (NAD 83)

Altitude: 1275.33

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

Location:
In MARICOPA county, AZ View Original Datasheet
Designation:
A 518
Marker Type:
metal rod
Setting:
stainless steel rod
Stability:
Most reliable and expected to hold position/elevation well.

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Found

[Photos:]
photo
photo

found under 2 inches of dirt at
N33 24.940 W111 45.561

[Photos:]
photoclose-up of benchmark
photogps and benchmark
photolooking north

The mark was once again covered by at least 4 inches of mud, and the inside access area was also full of mud. Cleared away prior to taking photos. Otherwise in good condition as described.

[Photos:]
photocloseup
photolooking west
photowith gps
photowitness post
photoA 518
photothe rod

Found as described

[Photos:]
photoIMG00087
photoIMG00088
photoIMG00089

Recovered. Interesting reading the log below as there was a good 1/2" of dirt on it already after just a month since last find. Pictures are accurate as to condition

[Photos:]
photoDU2317 - Mark with GPSr
photoDU2317 - Access plate open
photoDU2317 - Looking North easterly

Recovered. When I arrived the cover of the rod was under about 3 inches of dirt. I removed the dirt on the cover to make the recovery. Pics included of the mark when I arrived, close ups of the cover, rod, and how I left it.

[Photos:]
photoArrival
photoClose-Up of GPS and Cover
photoClose-Up of GPS and BM
photoDeparture

Recovered as described.

[Photos:]
photoA 518 / DU2317

i was in the area and i found this one. the coords were off but it was in the area. N33 24.939 W111 45.559

[Photos:]
photothe benchmark
survey post, benchmark with my gps
photothe benchmark
benchmark with my gps
photothe benchmark
benchmark up close

Recovered in good condition as described except the South end of the brick wall was demolished, the Mobile Home Park does not have an external sign but has a posted address of 3330 (East Main Street), and the mark is 6.5 feet North of the sidewalk. Coordinates are:
N 33° 24.939 W 111° 45.558 (NAD 83).

[Photos:]
photoDU2317 - Benchmark - Maricopa County, AZ
photoDU2317 - Cover open
photoDU2317 - Southwest looking Northeast

Looked for this one on the way home from work. Sure enough, it's there. Have seen a couple of the little rods like this one, but don't know what they are for.

Documented History (by the NGS)

01/01/1992 by NGS (MONUMENTED)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1992 7.5 KM (4.65 MI) EASTERLY ALONG U.S. HIGHWAY 60 (MAIN STREET) FROM THE JUNCTION OF STATE HIGHWAY 87 (COUNTRY CLUB DRIVE) IN MESA, 10.0 M (32.8 FT) NORTH OF AND LEVEL WITH THE CENTER OF THE WESTBOUND LANES OF THE HIGHWAY, 9.2 M (30.2 FT) WEST OF THE CENTER OF CYPRESS ESTATES MOBILE HOME PARK ENTRANCE ROAD, 1.2 M (3.9 FT) NORTH OF THE SOUTH END OF A BRICK WALL, 0.5 M (1.6 FT) WEST OF THE WALL, AND 0.3 M (1.0 FT) SOUTH OF A WITNESS POST. NOTE--ACCESS TO THE DATUM POINT IS THROUGH A 5-INCH LOGO CAP.

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 November 1993.
  • 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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