Details for Benchmark: JX0178
N 39° 28.050 W 080° 08.867 (NAD 83)
Coordinates may not be exact. Altitude is POSTED and location is SCALED. (more info)
- In MARION county, WV View Original Datasheet
- K 33
- 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)
|01/01/1935 by CGS (MONUMENTED)
|DESCRIBED BY COAST AND GEODETIC SURVEY 1935
AT FAIRMONT. AT FAIRMONT, MARION COUNTY, ON THE BALTIMORE AND OHIO RAILROAD, AT THE NORTHWEST CORNER OF THE MONONGAHELA RIVER BRIDGE, 186 FEET SOUTH OF THE GASTON JUNCTION STATION, 141 FEET SOUTH OF POLE 300+30, AND 12 FEET WEST OF THE CENTERLINE OF THE WEST TRACK. A STANDARD DISK, STAMPED K 33 1935 AND SET IN THE TOP OF A CONCRETE POST.
|01/01/1983 by NGS (MARK NOT FOUND)
|RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1983
NOT RECOVERED, A THOROUGH SEARCH WAS MADE FOR THE MARK.
|09/07/1989 by HARTMN (GOOD)
|RECOVERY NOTE BY HARTMANN ASSOCIATES INCORPORATED 1989
ON THE LEFT BANK OF THE MONONGAHELA RIVER AT MILE 128.5, AT FAIRMONT, AT THE NORTH ABUTMENT OF THE BALTIMORE AND OHIO RAILROAD BRIDGE OVER THE MONONGAHELA RIVER, AT GASTON JUNCTION, A STANDARD USCGS BENCHMARK DISK SET IN A CONCRETE POST AT THE WEST SIDE OF THE ABUTMENT, ABOUT 5 FT (1.5 MT) NORTH OF THE STONE ABUTMENT, ABOUT 20 FT (6.1 MT) WEST OF THE WEST RAIL OF THE EAST TRACK.
- 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.