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Details for Benchmark: GP0460

N 36° 09.817 W 111° 05.800 (NAD 83)

Altitude: 5198.89

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

Location:
In COCONINO county, AZ View Original Datasheet
Designation:
B 506
Marker Type:
metal rod
Setting:
stainless steel rod
Stability:
Probably hold position/elevation well.

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Recovered in good description as described.

[Photos:]
photoB 506 in northern AZ
photoB 506 cleaned

Documented History (by the NGS)

01/01/1983 by NGS (MONUMENTED)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1983 12.9 KM (8.0 MI) NE FROM TUBA CITY. 12.9 KM (8.0 MI) NORTHEASTERLY ALONG U.S. HIGHWAY 160 FROM ITS JUNCTION WITH STATE HIGHWAY 264 IN TUBA CITY, 0.3 KM (0.2 MI) SOUTHWEST OF MILEPOST 330, 30.3 METERS (99.4 FT) SOUTHEAST OF THE CENTERLINE OF THE HIGHWAY, AND 7.4 METERS (24.3 FT) NORTHEAST OF THE CENTER OF A PRIVATE DRIVE LEADING SOUTHEAST. NOTE=ACCESS TO THE DATUM POINT IS THROUGH A 5-INCH LOGO CAP. THE MARK IS 0.3 METERS NW FROM A WITNESS POST AND FENCE THE MARK IS ABOVE LEVEL WITH THE HIGHWAY.

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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