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Details for Benchmark: FR0675

N 35° 37.350 W 113° 55.283 (NAD 83)

Altitude: 2944.21

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

Location:
In MOHAVE county, AZ View Original Datasheet
Designation:
M 125
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 in good condition. Found using quad map showing "BM" along the old road. Old road is almost gone now! See photos of the road now.

[Photos:]
photoM 125 in AZ
photoM 125 view west
photoM 125 view south along old road
photoM 125 view north along old road

Documented History (by the NGS)

01/01/1935 by CGS (MONUMENTED)
01/01/1940 by NGS (GOOD)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1940 20.9 MI N FROM HACKBERRY. 20.9 MILES NORTH ALONG THE ROAD LEADING TO PIERCES FERRY VIA RED LAKE (DRY) FROM THE RAILROAD STATION AT HACKBERRY, MOHAVE COUNTY 0.3 MILE NORTHWEST OF THE INTERSECTION OF THE ROAD LEADING TO THE P AND M MINE, 12 FEET EAST OF THE CENTERLINE OF THE ROAD, AND 2 FEET NORTH OF A WHITE WOODEN WITNESS POST. A STANDARD DISK, STAMPED M 125 1935 AND SET IN THE TOP OF A CONCRETE POST PROJECTING 0.4 FOOT ABOVE GROUND.

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 1992. * This is a POSTED BENCH MARK height. Code B indicates a distribution rate of 1.1 thru 2.0 mm/km.
  • 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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