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Details for Benchmark: DV0347

N 33° 02.933 W 112° 16.633 (NAD 83)

Altitude: 1339.54

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

Location:
In MARICOPA county, AZ View Original Datasheet
Designation:
K 89
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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Recovered as described, in good condition. The shack is long gone, and the road is vague, but the listed co-ordinates are within 20 feet!

[Photos:]
photoK 89 / DV0347
A close-up of the mark, with the GPSr.
photoK 89 / DV0347
A close-up of the mark alone.
photoK 89 / DV0347
A view of the general area, looking west. Just a bit southwest of the middle of nowhere.

Documented History (by the NGS)

01/01/1935 by CGS (MONUMENTED)
DESCRIBED BY COAST AND GEODETIC SURVEY 1935 0.6 MI S FROM MOBILE. IN A LARGE DRAW WITH SHALL WASHES RUNNING DOWN IT, ABOUT 1/4 MI. WEST OF AN OLD HOMESTEAD SHACK., AND 16 FEET EAST OF THE CENTERLINE OF THE ROAD.
01/01/1948 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1948 RECOVERED IN GOOD CONDITION.
01/01/1974 by USGS (GOOD)
RECOVERY NOTE BY US GEOLOGICAL SURVEY 1974 0.6 MI. SW FROM MOBILE, 1.2 MI. NNE FROM MOBILE WELL, 0.3 MI. SOUTH FROM RR, 0.5 MI. NW FROM SE CORNER OF SECTION 29 T4S R1E, ABOUT 175 FEET WEST FROM DIRT ROAD. A STANDARD DISK.
01/01/1980 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1980 RECOVERED IN GOOD CONDITION.
01/01/1980 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1980 RECOVERED IN GOOD CONDITION.

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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