Details for Benchmark: LK0193
N 40° 45.600 W 103° 10.283 (NAD 83)
Coordinates may not be exact. Altitude is ADJUSTED and location is SCALED. (more info)
- In LOGAN county, CO View Original Datasheet
- M 26
- Marker Type:
- bench mark disk
- set into the top of a round concrete monument
- May hold, but of type commonly subject to surface motion.
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Documented History (by the NGS)
|01/01/1933 by CGS (MONUMENTED)
|DESCRIBED BY COAST AND GEODETIC SURVEY 1933
9.6 MI N FROM STERLING. 9.6 MILES NORTH OF STERLING BY RAIL M-26 IS LOCATED ON THE R/W OF THE C.B. AND Q. RAILROAD AT A ROAD CROSSING 12 POLES SOUTH OF MILEPOST 105, APPROX. 100 FEET NORTH OF THE POINT OF SWITCH TO JESSICA SIDING, AND SUGAR BEET LOADING CHUTE, 32.5 FEET WEST OF THE WEST RAIL OF THE MAINLINE, 50 FEET NORTH OF THE CENTERLINE OF THE ROAD, 67 FEET EAST OF THE CENTERLINE OF THE ROAD ON THE WEST SIDE OF THE TRACKS, AND ON THE SOUTH BOUNDARY OF SEC. 10, T.9.N., R52.W. TABLET IS STAMPED M-26, 1933.
|01/01/1934 by NGS (GOOD)
|RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1934
RECOVERED IN GOOD CONDITION.
|01/01/1985 by NGS (GOOD)
|RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1985
RECOVERED IN GOOD CONDITION. NEW DESCRIPTION FOLLOWS. 5.6 KM (3.5 MI) NORTHEAST ALONG US HIGHWAY 138 FROM THE POST OFFICE AT STERLING, THENCE 10.5 KM (6.5 MI) NORTH ALONG ROAD 43.5, AT A ROAD CROSSING AND THE CROSSING OF THE BURLINGTON NORTHERN RAILROAD, AT THE JUNCTION OF ROAD 46, 15.2 METERS (50 FT) NORTH OF THE CENTER OF ROAD 46, 9.8 METERS (32 FT) WEST OF THE WEST RAIL, 20.4 METERS (67 FT) EAST OF THE CENTER OF A ROAD LEADING NORTH ON THE WEST SIDE OF THE TRACKS AND 1.8 METERS (6 FT) NORTH OF A POWER POLE. THE MARK IS 0.3 METERS S FROM A WITNESS POST THE MARK IS 0.3 M BELOW THE TRACKS.
|03/10/1998 by MSAM (GOOD)
|RECOVERY NOTE BY MOUNTAIN SURVEYING 1998 (KCH)
RECOVERED AS DESCRIBED.
- 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. WARNING-Repeat measurements at this control monument indicate possible vertical movement.
- 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.