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Details for Benchmark: LN0104

N 40° 10.817 W 108° 32.450 (NAD 83)

Altitude: 5434.99

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

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

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N 40° 10.845 W 108° 32.466

Bench Mark B 151 was recovered as described, in good condition.

[Photos:]
photoLN0104 20060402 G (Rio Blanco Co. Colorado)
Bench Mark B 151 w/GPSr.
photoLN0104 20060402 C (Rio Blanco Co. Colorado)
Bench Mark B 151.
photoLN0104 20060402 B (Rio Blanco Co. Colorado)
Bench Mark B 151 from Eye Level.
photoLN0104 20060402 A1 N (Rio Blanco Co. Colorado)
North at Bench Mark B 151.
photoLN0104 20060402 A2 E (Rio Blanco Co. Colorado)
East at Bench Mark B 151.

Documented History (by the NGS)

1/1/1934 by CGS (MONUMENTED)
DESCRIBED BY COAST AND GEODETIC SURVEY 1934 3.3 MI W FROM ANGORA JCT. 3.3 MILE WEST OF ANGORA JCT., ALONG STATE HWY. 64. ABOUT 0.1 MILE EAST OF POINT WHERE HIGHWAY CROSSES IRRIGATION DITCH. 85 FEET NORTHEAST OF NORTH END OF CORRUGATED PIPE HIGHWAY CULVERT. 80 FEET SOUTHWEST OF LOG BARN SURROUNDED BY POLE CORRAL. 75 FEET NORTH OF CENTERLINE OF STATE HWY. 64. 40 FEET EAST OF WASH. 4 FEET SOUTH OF JOHN BEARD PROPERTY FENCE. TABLET SET IN PRECAST 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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