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Details for Benchmark: LL0359

N 40° 52.200 W 104° 43.000 (NAD 83)

Altitude: 5506.65

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

Location:
In WELD county, CO View Original Datasheet
Designation:
F 309
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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Found in good shape.

[Photos:]
photoF309 from eye level
photoF309 with Pawnee WRF in backround

Found in good cond.

[Photos:]
photoLL0359 1952
photoP1000283.JPG
N 40° 52.200 W 104° 43.029

Benchmark recovered as described, in good condition. This benchmark is 4.06 miles east of U.S. 85 on Weld County Rd. 122.

[Photos:]
photoBenchmark w/GPSr
photoBenchmark
photoBenchmark from Eye Level
photoSouth at Benchmark
photoEast at Benchmark

Documented History (by the NGS)

01/01/1952 by CGS (MONUMENTED)
DESCRIBED BY COAST AND GEODETIC SURVEY 1952 10.4 MI SE FROM CARR. 4.25 MILES EAST ALONG A GRAVELED ROAD FROM THE UNION PACIFIC RAILROAD STATION AT CARR, THENCE 2.0 MILES SOUTH ALONG U.S. HIGHWAY 85, THENCE 4.2 MILES EAST ALONG A GRAVELED ROAD, 0.1 MILE WEST OF A JUNCTION WITH A GRAVELED ROAD LEADING SOUTH AND A TRACK ROAD LEADING NORTH, ON THE WEST SLOPE OF A HILL, 38 FEET NORTH OF THE CENTER LINE OF A GRAVELED ROAD, 5.2 FEET NORTH OF A FENCE, 3 FEET WEST OF A WITNESS POST, SET IN THE TOP OF A CONCRETE POST WHICH PROJECTS 0.3 FOOT ABOVE THE GROUND.

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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