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Details for Benchmark: LN0027

N 40° 30.117 W 108° 16.133 (NAD 83)

Altitude: 6073.44

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

Location:
In MOFFAT county, CO View Original Datasheet
Designation:
E 46
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° 30.135 W 108° 16.139

Bench Mark E 46 was recovered in good condition.

A new To Reach follows: 6.1 miles west along Colorado 318 from Maybell to Moffat County Road 23; thence west and south 5.5 miles on MCR 23 to MCR 85; thence right on MCR 85 1.0 mile to the station on the right. Station is 43 feet west of the centerline of MCR 85.

[Photos:]
photoLN0027 20060402 G (Moffat Co. Colorado)
Bench Mark E 46 w/GPSr.
photoLN0027 20060402 C (Moffat Co. Colorado)
Bench Mark E 46.
photoLN0027 20060402 B (Moffat Co. Colorado)
Bench Mark E 46 from Eye Level.
photoLN0027 20060402 A1 N (Moffat Co. Colorado)
North at Bench Mark E 46.
photoLN0027 20060402 A2 W (Moffat Co. Colorado)
West at Bench Mark E 46.

Documented History (by the NGS)

1/1/1934 by CGS (MONUMENTED)
1/1/1960 by USGS (GOOD)
DESCRIBED BY US GEOLOGICAL SURVEY 1960 12.6 MI W FROM MAYBELL. 6.1 MILES WEST ALONG COLO. 318 FROM MAYBELL (JUNCTION OF U. S. 40 AND COLO. 318), 6.5 WEST ALONG GRADED ROAD, 3/4 MILE EAST OF A LARGE WHITE RANCH HOUSE IN THE YAMPA RIVER VALLEY, 48 YARDS WEST OF A TELEPHONE POLE, AND 43 FEET WEST OF THE CENTERLINE OF THE HIGHWAY. A STANDARD DISK, STAMPED E 46 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 1992. * This is a POSTED BENCH MARK height. Code B indicates a distribution rate of 1.1 thru 2.0 mm/km.
  • 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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