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Details for Benchmark: DU0520

N 33° 04.767 W 111° 20.767 (NAD 83)

Altitude: 1523

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

Location:
In PINAL county, AZ View Original Datasheet
Designation:
RV 306
Marker Type:
rivet
Setting:
light structures
Stability:
Mark of questionable or unknown stability.

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N 33° 04.784 W 111° 20.795

Found in good shape, as described.

[Photos:]
photoDU0520

Found in good shape.

[Photos:]
photoDU0520

Found in good condition.

Recovered in good condition

[Photos:]
photoDU0520 Rivet Mark with GPSr

Recovered in good condition. Mark has a white circle of paint around it to aid in its location.

[Photos:]
photoDU0520 RV 306
photoWith the GPSr

Located this rivet while out with friends today. All is well in the land of the Benchmarks and this one is standing tall and shiney.

[Photos:]
photoDU0520
photoArea

Recovered as described, in good condition. GPS (HH2) co-ordinates N33º04.783' W111º20.797'.

[Photos:]
photoRV 306 / DU0520
A close-up of the mark, with the GPSr.
photoIM006827
A close-up of the mark alone.
photoRV 306 / DU0520
A wide view of the general area, looking east.

Recovered in good condition as described with the following update to the description - the culvert has the date 1928 stamped in it. Handheld coordinates:
N 33° 04.784 W 111° 20.796 (NAD 83).

To reach directions follows - from the intersection of AZ Highway 79 and Price Road take Price Road East for 2.4 miles to a railroad crossing and the Station on the left.

[Photos:]
photoDU0520 - Benchmark - Pinal County, AZ
photoDU0520 - West looking East
photoDU0520 - Southeast looking Northwest

Documented History (by the NGS)

Unknown by SPRR (MONUMENTED)
01/01/1934 by NGS (GOOD)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1934 2.9 MI E FROM FLORENCE. 2.9 MILES EAST ALONG THE SOUTHERN PACIFIC CO. RAILROAD FROM FLORENCE, 120 FEET WEST OF A ROAD CROSSING, AT 5-FOOT CONCRETE CULVERT 961 E, IN THE TOP OF THE CONCRETE HEADWALL, AND 10 FEET NORTH OF THE CENTERLINE OF THE TRACK. A STANDARD MONEL-METAL RIVET.

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  • The NAVD 88 height was computed by applying the VERTCON shift value to the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.) The vertical order pertains to the superseded datum.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