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Details for Benchmark: KK0904

N 39° 06.833 W 105° 59.667 (NAD 83)

Altitude: 9381.48

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

Location:
In PARK county, CO View Original Datasheet
Designation:
F 176
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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Found as described in good condition. BM is west of OLD highway, NOT where the highway is today.

[Photos:]
photoKK0904 F 176
photoKK0904 VIEW TO THE WEST

Documented History (by the NGS)

01/01/1934 by CGS (MONUMENTED)
01/01/1954 by NGS (MARK NOT FOUND)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1954 8 MI S FROM FAIRPLAY. 8.0 MILES SOUTH ALONG U.S. HIGHWAY 285 FROM FAIRPLAY, PARK COUNTY, 0.3 MILE EAST OF A PINE COVERED MOUNTAIN, 0.4 MILE NORTH OF A CULVERT, 28.5 FEET WEST OF THE CENTERLINE OF THE HIGHWAY, AND 22.6 FEET SOUTH OF A FENCE CORNER. A STANDARD DISK, STAMPED F 176 1934 AND SET IN THE TOP OF A CONCRETE POST.

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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