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Details for Benchmark: FR0701

N 35° 23.717 W 113° 39.300 (NAD 83)

Altitude: 3863.24

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

Location:
In MOHAVE county, AZ View Original Datasheet
Designation:
A 487
Marker Type:
bench mark disk
Setting:
in rock outcrop
Stability:
Most reliable and expected to hold position/elevation well.

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N 35° 23.715 W 113° 39.323

Recovered in good condition. Description is adequate to locate the station mark.

[Photos:]
photoA 487 on old Route 66 in AZ
photoA 487 view from the highway parking area.

Documented History (by the NGS)

01/01/1982 by NGS (MONUMENTED)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1982 28.5 KM (17.7 MI) SW FROM PEACH SPRINGS. 28.5 KM (17.7 MILES) SOUTHWEST ALONG US HIGHWAY 66 FROM THE POST OFFICE AT PEACH SPRINGS, 0.9 KM (0.7 MILE) NORTHEAST OF THE OLD INDIAN SCHOOL BUILDING AT VALENTINE, 0.16 KM (0.1 MILE) SOUTHWEST OF HIGHWAY MILEPOST 86, 45.7 METERS (150.0 FEET) NORTHEAST OF THE NORTHEAST END OF A HIGHWAY CUT, 23.4 METERS (77.0 FEET) NORTHWEST OF THE CENTERLINE OF THE HIGHWAY, 7.6 METERS (25.0 FEET) SOUTHEAST OF A FENCE, IN TOP OF A LOW FLAT LEDGE OF MASSIVE GRANITE OUTCROP. THE MARK IS 0.3 METERS N FROM A WITNESS POST. 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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