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Details for Benchmark: DV1256

N 33° 37.950 W 112° 06.983 (NAD 83)

Altitude: 1324.31

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

Location:
In MARICOPA county, AZ View Original Datasheet
Designation:
2
Marker Type:
bench mark disk
Setting:
retaining walls, concrete ledge, etc.
Stability:
Probably hold position/elevation well.

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found at N33 37.966 W112 07.002

[Photos:]
photoclose-up of benchmark
photogps and benchmark
photolooking south
N 33° 37.967 W 112° 07.000

Found this benchmark today in good condition.

[Photos:]
photoCloseup of the benchmark with GPS
photoMedium-wide view of the mark
photoWide view looking north

The Benchmark is in good shape.

[Photos:]
photoDV1256
photoDV1256
photoDV1256

Found for Day 33 +10 of Trifecta Challenge (Geocache: GC132N2, Benchmark: DV1256 and Waymark: WM949W).

[Photos:]
photoDV1256 wGPSr

Going from point A to point B today. This mark was on the way there in a manner of speaking. Snapped a photo and went on my way. In good condition still.

[Photos:]
photoDV1256 Bench Mark

Found this one on a lazy Sunday with no kids.

[Photos:]
photoThe view East
photoThe Mark.

Recovered as described, in good condition.

[Photos:]
photo2 / DV1256
A close-up of the mark, W/GPSr.
photo2 / DV1256
A wider view of the general area.

The disk is on the southbound frontage road between Bell and Greenway. It is on the top of the west wall of the bridge for the wash just north of the AGI Buidling.

[Photos:]
photoAZ DV1256 Details
photoLocal Area Closeup
photoLocal Area Longshot Looking North

Found this one in good condition, but covered in stiff mud and dirt. Took some elbow grease and some of the water out of the culvert, but it's what I would classify as good condition.

[Photos:]
photoDV1256
DV1256

Documented History (by the NGS)

Unknown by AZDT (MONUMENTED)
01/01/1981 by NGS (GOOD)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1981 17.4 KM (10.8 MI) NORTH FROM PHOENIX. 17.4 KM (10.8 MI) NORTH ALONG INTERSTATE HIGHWAY 17 FROM THE INTERSECTION OF GRAND AVENUE AT PHOENIX, IN TOP AND CENTER OF THE WEST HEADWALL OF A 3-CHANNEL CULVERT, 5 METERS (16.4 FT) WEST OF THE CENTERLINE OF THE WEST FRONTAGE ROAD. THE MARK IS ABOVE LEVEL WITH THE ROAD.

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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