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Details for Benchmark: AC6868

N 40° 29.482 W 107° 59.813 (NAD 83)

Altitude: 6193

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

Location:
In MOFFAT county, CO View Original Datasheet
Designation:
50 DHW 6189
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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Bench Mark 50 DHW 6189 was recovered as described, in good condition.

[Photos:]
photoAC6868 20060402 G (Moffat Co. Colorado)
Bench Mark 50 DHW 6189 w/GPSr.
photoAC6868 20060402 C (Moffat Co. Colorado)
Bench Mark 50 DHW 6189.
photoAC6868 20060402 B (Moffat Co. Colorado)
Bench Mark 50 DHW 6189 from Eye Level.
photoAC6868 20060402 A1 N (Moffat Co. Colorado)
North at Bench Mark 50 DHW 6189.
photoAC6868 20060402 A2 E (Moffat Co. Colorado)
East at Bench Mark 50 DHW 6189.

Documented History (by the NGS)

1/1/1955 by USGS (MONUMENTED)
DESCRIBED BY US GEOLOGICAL SURVEY 1955 (DHW) THE STATION IS LOCATED ABOUT 6 MI (9.7 KM) SOUTHEAST OF MAYBELL, 3 MI (4.8 KM) NORTHWEST OF JUNIPER HOT SPRINGS AND 0.6 MI (1.0 KM) NORTHWEST OF THE CROSSING OF A POWER LINE AND MOFFAT COUNTY ROAD 74, IN THE NORTHWEST 1/4 OF SECTION 7, T 6 N, R 94 W, AT MOFFAT COUNTY ROAD 74 MILEPOST 5.65. OWNERSHIP--MOFFAT COUNTY ROAD RIGHT-OF-WAY TO REACH THE STATION FROM THE INTERSECTION OF U. S. HIGHWAY 40 AND MOFFAT COUNTY ROAD 74, ABOUT 4 MI (6.4 KM) EAST OF MAYBELL, GO SOUTHEAST ON MOFFAT COUNTY ROAD 74 FOR 1.7 MI (2.7 KM) TO A SIDE ROAD LEFT AND THE STATION ON THE LEFT ON TOP OF A HIGH POINT ON THE ROAD THE MARK IS A STANDARD USGS DISK SET IN THE TOP OF A 17 CM SQUARE CONCRETE POST PROJECTING ABOUT 1 CM ABOVE THE GROUND. IT IS 8.5 M (27.9 FT) EAST-NORTHEAST FROM THE CENTER OF MOFFAT COUNTY ROAD 74, 6.3 M (20.7 FT) NORTHWEST FROM THE CENTER OF A DIRT ROAD TO THE NORTHWEST, 2.1 M (6.9 FT) SOUTHEAST FROM A TALL FENCE CORNER, 0.2 M (0.7 FT) SOUTH FROM A WITNESS POST AND ABOUT 0.9 M (3.0 FT) ABOVE THE COUNTY ROAD.

Control Text

  • The horizontal coordinates were established by GPS observations and adjusted by the National Geodetic Survey in March 1997.
  • The orthometric height was determined by GPS observations and a high-resolution geoid model.
  • The X, Y, and Z were computed from the position and the ellipsoidal ht.
  • The Laplace correction was computed from DEFLEC99 derived deflections.
  • The ellipsoidal height was determined by GPS observations and is referenced to NAD 83.
  • The geoid height was determined by GEOID99.

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