Skip to Content

Details for Benchmark: KM0112

N 39° 58.267 W 108° 52.000 (NAD 83)

Altitude: 6185.86

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

Location:
In RIO BLANCO county, CO View Original Datasheet
Designation:
R 151
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.

Must Read!

Benchmarks may be on private property or in dangerous locations. Obey local laws. By using the services on Geocaching.com you agree to this disclaimer.

Found as described, also about 110 feet southwest of a 4.5 foot tall round wood post in the south angle of the intersection of Rio Blanco 23 and the dirt road leading southeast. Handheld coordinates are N39-58.293 W108-52.017.

[Photos:]
photoKM0112 BMDisk R151
photoKM0112 R151 in Rio Blanco Co., CO
Looking southwest along Rio Blanco 23, the disk is at center and about 110 feet distant.
N 39° 58.292 W 108° 52.017

Bench Mark R 151 was recovered in good condition. It was as described, with the addition that it is located at MP 9.75 on Rio Blanco County Road 23.

[Photos:]
photoKM0112 20060408 G (Rio Blanco Co. Colorado)
Bench Mark R 151 w/GPSr.
photoKM0112 20060408 C (Rio Blanco Co. Colorado)
Bench Mark R 151.
photoKM0112 20060408 B (Rio Blanco Co. Colorado)
Bench Mark R 151 from Eye Level.
photoKM0112 20060408 A1 N (Rio Blanco Co. Colorado)
North at Bench Mark R 151.
photoKM0112 20060408 A2 NW (Rio Blanco Co. Colorado)
Northwest at Bench Mark R 151.

Documented History (by the NGS)

01/01/1934 by CGS (MONUMENTED)
01/01/1964 by USGS (GOOD)
DESCRIBED BY US GEOLOGICAL SURVEY 1964 10.6 MI SW FROM RANGLEY. FROM THE RANGELY P.O. 0.6 MI. W. OF ALONG COLO. 64, THENCE 10.0 MI. S.W. ALONG CO. RD. 23. ON TOP OF A HILL, 35 FT, S.E. OF CL CO. RD. 23, 90 FT. S.W. OF CL DIRT ROAD S.E. STD. TAB. IN CONC. POST PROJ. 8 IN. STAMPED R-151 1934.
01/01/1984 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1984 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.

Advertising with Us

Return to the Top of the Page