Details for Benchmark: MC0472
N 41° 08.400 W 083° 19.433 (NAD 83)
Coordinates may not be exact. Altitude is ADJUSTED and location is SCALED. (more info)
- In SENECA county, OH View Original Datasheet
- D 312
- Marker Type:
- bench mark disk
- copper-clad steel rod
- Probably hold position/elevation well.
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Documented History (by the NGS)
|01/01/1968 by CGS (MONUMENTED)
|DESCRIBED BY COAST AND GEODETIC SURVEY 1968
2 MI W FROM BASCOM. ABOUT 2.0 MILES WEST ALONG THE BALTIMORE AND OHIO RAILROAD FROM THE CROSSING OF STATE HIGHWAY 635 AT BASCOM, IN SECTION 11, R13E, T2N, 110 FEET NORTH OF AND ACROSS THE TRACK FROM BENCH MARK J 172 DESCRIBED, AT MILEPOLE 32-01, 74 1/2 FEET NORTHWEST OF THE CENTER OF THE CROSSING OF COUNTY ROAD NO. 5 AND THE WESTBOUND TRACK, 61 FEET NORTH OF THE NORTH RAIL OF THE WESTBOUND TRACK, 26 1/2 FEET WEST OF THE CENTER LINE OF THE ROAD, 16 FEET NORTH OF THE WEST END OF A 24-INCH PIPE CULVERT UNDER THE ROAD, 1 1/2 FEET SOUTHEAST OF A POWER LINE TOWER BRACE POLE, ABOUT 6 FEET BELOW THE LEVEL OF THE TRACK AND IS A DISK ON THE TOP OF A COPPER COATED STEEL ROD PROJECTING 3 INCHES ABOVE THE LEVEL OF THE GROUND AND IS PROTECTED BY A 4-INCH METAL PIPE WHICH PROJECTS 6 INCHES ABOVE THE LEVEL OF THE GROUND. THE ROD WAS DRIVEN TO REFUSAL AT A DEPTH OF 15 FEET.
|10/22/1992 by NGS (GOOD)
|RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1992
7.9 KM (4.90 MI) EASTERLY ALONG THE CHESSIE SYSTEMS RAILROAD FROM THE JUNCTION OF U.S. HIGHWAY 23 IN FOSTORIA, 33.5 M (109.9 FT) NORTH OF BENCH MARK J 172, 19.6 M (64.3 FT) NORTH OF THE NEAR RAIL, 2.0 M (6.6 FT) BELOW THE LEVEL OF THE TRACK, 0.4 M (1.3 FT) SOUTH-SOUTHEAST OF A UTILITY POLE WITH A GUY CABLE, AND 0.2 M (0.7 FT) SOUTHEAST OF A WITNESS POST. NOTE--THE DISK IS ENCASED IN A 4-INCH METAL PIPE AND PROJECTS 0.1 M (0.3 FT) ABOVE THE GROUND SURFACE.
- 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 April 1995.
- 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.