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Details for Benchmark: JM0217

N 38° 56.700 W 109° 22.517 (NAD 83)

Altitude: 4460.57

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

Location:
In GRAND county, UT View Original Datasheet
Designation:
4455
Marker Type:
pipe cap
Setting:
set into the top of a metal pipe driven into the ground
Stability:
Mark of questionable or unknown stability.

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Found it easily.

[Photos:]
photoUPside down mark (could not get it turned over).

1/4 mile hike across 8 inches of not quite crusted enough snow -but the solid snowfield background made it easy to see from UT 128

[Photos:]
photoJM0217 USGS 4455 1910
photoJM0217 E
photoJM0217 NNE
'OPPOSITE MILEPOST 508'

Found this old pipe cap in good condition and as described. I was able to drive to the southerly R/W across the tracks from the station.

[Photos:]
photo4455 - Grand County, UT
photo4455 - Grand County, UT
photo4455 - Grand County, UT

Documented History (by the NGS)

01/01/1910 by USGS (MONUMENTED)
01/01/1954 by NGS (GOOD)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1954 3.7 MI W FROM CISCO. 3.7 MILES WEST ALONG THE DENVER AND RIO GRANDE WESTERN RAILROAD FROM CISCO, GRAND COUNTY, OPPOSITE MILEPOST 508, AND AT THE NORTH EDGE OF THE RIGHT-OF-WAY. A UNITED STATES GEOLOGICAL SURVEY STANDARD CAP, STAMPED 4455 1910 67 AND RIVETED ON THE TOP OF A 3-1/2-INCH IRON PIPE.

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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