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Details for Benchmark: LN0081

N 40° 18.717 W 108° 31.150 (NAD 83)

Altitude: 5862.14

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

Location:
In MOFFAT county, CO View Original Datasheet
Designation:
S 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° 18.735 W 108° 31.171

Bench Mark S 46 was recovered in good condition.

A new To Reach follows: 4.9 miles west along U.S. Highway 40 from the intersection of Moffat County Road 14 at Elk Springs to MP 32.1; thence southwest along a track road 0.1 mile to the mark on the right. Mark is 52 feet northwest of the centerline of the old alignment of U.S. 40, and 225 feet northwest of a concrete highway ROW marker.

[Photos:]
photoLN0081 20060402 G (Moffat Co. Colorado)
Bench Mark S 46 w/GPSr.
photoLN0081 20060402 C (Moffat Co. Colorado)
Bench Mark S 46.
photoLN0081 20060402 B (Moffat Co. Colorado)
Bench Mark S 46 from Eye Level.
photoLN0081 20060402 A1 N (Moffat Co. Colorado)
North at Bench Mark S 46.
photoLN0081 20060402 A2 E (Moffat Co. Colorado)
East at Bench Mark S 46.

Documented History (by the NGS)

01/01/1934 by CGS (MONUMENTED)
01/01/1962 by NGS (GOOD)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1962 4.9 MI W FROM ELK SPRINGS. 4.9 MILES WEST ALONG U. S. HIGHWAY 40 FROM THE INTERSECTION OF MOFFAT COUNTY ROAD NO. 14 AT ELK SPRINGS, MOFFAT COUNTY, 79.5 FEET SOUTHWEST OF THE WEST CORNER OF THE NORTHWEST CONCRETE HEADWALL OF A 24-INCH PIPE CULVERT, 52 FEET NORTHWEST OF THE CENTERLINE OF THE HIGHWAY, AND 16 FEET SOUTHWEST OF TELEPHONE POLE 9550. A STANDARD DISK, STAMPED S 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 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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