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Details for Benchmark: HX2068

N 38° 23.133 W 081° 35.050 (NAD 83)

Altitude: 605.09

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

Location:
In KANAWHA county, WV View Original Datasheet
Designation:
Z 7
Marker Type:
bench mark disk
Setting:
in rock outcrop
Stability:
Most reliable and expected to hold position/elevation well.

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Log to post pic of nearby USGS mark

[Photos:]
photoMap of Z 7 and possible USGS mark

I looked for this BM twice back in 2005 but both times relied on the coords & hoping to find the rock setting --- no luck. I've kept this one in the back of my mind since then. This morning armed with my 200' tape, machete & shovel I made another attempt. Measured the referenced distances from the rr/culvert intersection and the "private road" crossing to establish the setting area. This RR has been abandoned for 50+ years and is extremely growed over just about everywhere along the track (the rails are still imtact)but I weas able to get good measurements. At the setting area and after much leaf raking and quite a bit of digging & probing I found no evidence of a "large rock". Is it still there....maybe.....will anyone else find it?.....best of luck!

[Photos:]
photoLots of work.....no BM

Train tracks were grown up with briars and saplings, plus fallen trees across the tracks. Alot of leaves and debris, Benchmark probably covered up, but hard to say. Did some digging and scraping but no luck finding it.

Documented History (by the NGS)

01/01/1933 by CGS (MONUMENTED)
DESCRIBED BY COAST AND GEODETIC SURVEY 1933 3.6 MI E FROM CHARLESTON. ABOUT 3.6 MILES EAST ALONG THE BALTIMORE AND OHIO RAILROAD FROM THE POST OFFICE AT CHARLESTON, KANAWHA COUNTY, ABOUT 11 RAILS EAST OF MASONRY CULVERT 36, ABOUT 6 1/2 RAILS EAST OF A PRIVATE CROSSING, 9 FEET SOUTH OF THE CENTER LINE OF THE TRACK, IN THE TOP OF A LARGE FLAT ROCK, AND ABOUT LEVEL WITH THE TRACK. A STANDARD DISK, STAMPED Z 7 1933.

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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