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Details for Benchmark: DV0306

N 33° 02.983 W 112° 17.600 (NAD 83)

Altitude: 1352.44

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

Location:
In MARICOPA county, AZ View Original Datasheet
Designation:
V 279
Marker Type:
bench mark disk
Setting:
massive structures
Stability:
Probably hold position/elevation well.

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Recovered as described, in good condition.

[Photos:]
photoV 279 / DV0306
A close-up of the mark, with the GPSr.
photoV 279 / DV0306
A close-up of the mark alone.
photoV 279 / DV0306
A wider view, looking northwest along the tracks.

Documented History (by the NGS)

01/01/1948 by CGS (MONUMENTED)
01/01/1967 by NGS (GOOD)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1967 1.3 MI W FROM MOBILE. ABOUT 1.3 MILES WEST ALONG THE SOUTHERN PACIFIC RAILROAD FROM THE NELSON ELEMENTARY SCHOOL AT MOBILE, IN S 30, T 4 S, R 1 E, 0.1 MILE WEST OF MILEPOST 883, 5 1/2 FEET NORTH OF THE NORTH RAIL OF THE NORTH SET OF TRACKS, SET IN THE TOP OF THE EAST END OF THE NORTH HEAD WALL OF RAILROAD BRIDGE NUMBER 882.91, AND ABOUT 1 FOOT BELOW THE LEVEL OF THE TRACKS.
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.
12/02/1994 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1994 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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