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Details for Benchmark: LN0024

N 40° 32.350 W 108° 11.833 (NAD 83)

Altitude: 5931.32

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

Location:
In MOFFAT county, CO View Original Datasheet
Designation:
B 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° 32.355 W 108° 11.850

Bench Mark B 46 was recovered in good condition.

A new To Reach follows: South from the intersection of Colorado Highway 318 and Moffat County Road 23 1.2 miles to Moffat County Road 143; thence east on MCR 143 0.4 mile to the station on the right. It is 25 feet west of the centerline of MCR 143, and 105 feet north of BLM Road 1565 (Yampa Valley Trail).

[Photos:]
photoLN0024 20060402 G (Moffat Co. Colorado)
Bench Mark B 46 w/GPSr.
photoLN0024 20060402 C (Moffat Co. Colorado)
Bench Mark B 46.
photoLN0024 20060402 B (Moffat Co. Colorado)
Bench Mark B 46 from Eye Level.
photoLN0024 20060402 A1 N (Moffat Co. Colorado)
North at Bench Mark B 46.
photoLN0024 20060402 A2 W (Moffat Co. Colorado)
West at Bench Mark B 46.

Documented History (by the NGS)

1/1/1934 by CGS (MONUMENTED)
DESCRIBED BY COAST AND GEODETIC SURVEY 1934 7.1 MI W FROM MAYBELL. 7.1 MILES WEST ALONG U. S. HIGHWAY 40 FROM MAYBELL, MOFFAT COUNTY, NEAR A ROAD JUNCTION, 45 YARDS SOUTH OF THE ROAD LEADING TO SUNBEAM, AND 28 FEET WEST OF THE CENTERLINE OF THE HIGHWAY. A STANDARD DISK, STAMPED B 46 1934 AND SET IN THE TOP OF A CONCRETE POST.
1/1/1968 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1968 RECOVERED IN GOOD CONDITION.
1/1/1982 by USGS (GOOD)
RECOVERY NOTE BY US GEOLOGICAL SURVEY 1982 7.1 MILES WEST ALONG US HWY. 40 FROM MAYBELL, 0.3 MILES WEST ALONG US HWY. 40 FROM MAYBELL, THENCE 5.6 MILES NORTHWEST ALONG STATE HWY. 318 TO Y-RD, THENCE 1.15 MILES WEST ALONG COUNTY ROAD 23 TO Y-RD EAST-SOUTHEAST IN THORNBURG DRAW, THENCE 0.4 MILES SOUTHEAST ALONG DIRT ROAD, 140 FT. NORTH OF TRANMISSION LINE, 25 FEET WEST OF CENTERLINE OF ROAD. A STANDARD DISK, STAMPED ''B 46 1934'' AND SET IN TOP OF 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 A indicates a distribution rate of 0.0 thru 1.0 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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