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Details for Benchmark: LK0348

N 40° 30.550 W 103° 57.317 (NAD 83)

Altitude: 4799.21

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

Location:
In MORGAN county, CO View Original Datasheet
Designation:
D 312
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 (after diging awhile) in good cond.

[Photos:]
photoLK0348
photoLK0348 1952
N 40° 30.574 W 103° 57.348

Not able to find. Dug several holes in the soft sand, but it is likely buried (unless it is gone).

The coordinates given above are for a point between the old witness post and the new orange witness post.

[Photos:]
photoWitness Post for Bench Mark D 312

Documented History (by the NGS)

1/1/1952 by CGS (MONUMENTED)
DESCRIBED BY COAST AND GEODETIC SURVEY 1952 12 MI NE FROM WELDONA. 0.3 MILE NORTH ALONG A GRAVELED ROAD FROM THE UNION PACIFIC RAILROAD STATION AT WELDONA, THENCE 0.4 MILE EAST ALONG A GRADED DIRT ROAD, THENCE 0.6 MILE NORTH ALONG A GRAVELED ROAD, THENCE 0.2 MILE EAST ALONG A GRAVELED ROAD, THENCE 10.45 MILES NORTH ALONG A GRADED DIRT ROAD, 55 FEET NORTH OF THE EXTENDED CENTER LINE OF A ROAD LEADING WEST, 89 FEET NORTHEAST OF A POWER POLE, 39 FEET EAST OF THE CENTER LINE OF A NORTH AND SOUTH ROAD, 35 FEET NORTH OF A FENCE LEADING EAST, 2.9 FEET WEST OF A NORTH AND SOUTH FENCE, 3.2 FEET SOUTH 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 1992. * This is a POSTED BENCH MARK height. Code C indicates a distribution rate of 2.1 thru 3.0 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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