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Details for Benchmark: DV1255

N 33° 37.033 W 112° 06.983 (NAD 83)

Altitude: 1304.53

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

Location:
In MARICOPA county, AZ View Original Datasheet
Designation:
1
Marker Type:
bench mark disk
Setting:
retaining walls, concrete ledge, etc.
Stability:
Probably hold position/elevation well.

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Found it on the headwall. South of Country Gables. West side of southbound access road. It is a little worn.

[Photos:]
photoDV1255
Close up
photoDV1255
looking south

found at N33 37.093 W112 07.027

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

Found it. Coordinates a little different.

Found for Day 33 +1 of Trifecta Challenge (Geocache: GC16CVV, Benchmark: DV1255 and Waymark: WM98G).

[Photos:]
photoDV1255 wGPSr

Recovered as described, in good condition.

[Photos:]
photo1 / DV1255
A wide view of the general area.
photo1 / DV1255
A close-up of the mark, w/GPSr.

YeeHaw! Got bit by the benchmark bug last night and went out to find one, but only found two lost or broken ones. Found this one online this morning at 2:00AM and found it offline at 2:15 AM. Pretty fun side of Geocaching!

[Photos:]
photoI love the smell of benchmarks in the morning!
Had to spit shine this one to get it to show, but she's still there after "all" these years.

Documented History (by the NGS)

Unknown by AZDT (MONUMENTED)
01/01/1981 by NGS (GOOD)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1981 15.8 KM (9.8 MI) NORTH FROM PHOENIX. 15.8 KM (9.8 MI) NORTH ALONG INTERSTATE HIGHWAY 17 FROM THE INTERSECTION OF GRAND AVENUE AT PHOENIX, AT THE CROSSING OF A POWER LINE, IN TOP AND CENTER OF THE WEST HEADWALL OF A DOUBLE BOX CULVERT UNDER THE WEST FRONTAGE ROAD, 5.7 METERS (18.7 FT) WEST OF THE CENTERLINE OF THE FRONTAGE ROAD, 9.8 METERS (32 FT) NORTH-NORTHEAST OF A POWER LINE POLE WITH A TRANSFORMER, 65.9 METERS (216 FT) SOUTH OF THE CENTERLINE OF COUNTRY GABLES DRIVE. THE MARK IS 0.15 M BELOW 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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