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Details for Benchmark: KL0027

N 39° 33.917 W 106° 07.617 (NAD 83)

Altitude: 9207.75

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

Location:
In SUMMIT county, CO View Original Datasheet
Designation:
B 282
Marker Type:
bench mark disk
Setting:
in a boulder
Stability:
May hold, but of type commonly subject to surface motion.

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Found what I belive is this benchmark located just east of a geocache located at N39 34.051 W106 07.158 just a few feet off of a paved path. The benchmark disk is set in a large boulder with a witness post a few feet away.

Unable to find benchmark. Coordinates would have put it in the middle of the westbound lanes of I-70.

Documented History (by the NGS)

01/01/1951 by CGS (MONUMENTED)
DESCRIBED BY COAST AND GEODETIC SURVEY 1951 4.95 MI SW FROM DILLON. 4.95 MILES SOUTHWEST ALONG U.S. HIGHWAY 6 FROM THE JUNCTION WITH STATE HIGHWAY 9 AT DILLON, 45 FEET NORTHWEST OF THE CENTER LINE OF THE HIGHWAY, 4 FEET ABOVE THE GROUND, SET IN THE TOP OF THE CENTER OF A 15X40 FOOT GRANITE BOULDER.
01/01/1970 by USGS (GOOD)
RECOVERY NOTE BY US GEOLOGICAL SURVEY 1970 RECOVERED IN GOOD CONDITION.

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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