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Details for Benchmark: GF0491

N 36° 16.233 W 093° 45.983 (NAD 83)

Altitude: 5330.5

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

Location:
In MADISON county, AR View Original Datasheet
Designation:
X 51 RESET
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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N 36° 16.249 W 093° 46.019

The cedar tree is now gone as well as the Witness Marker. Topozone shows a Benchmark across Highway 23 which is probably X 51 which probably was removed due to widening the Highway. I found the Mark in good shape.

[Photos:]
photoX 51 RESET near Forum, Madison Co., Ark.
photoX 51 RESET near Forum, Madison Co., ARK.
Background showing the Cedar and the Witness Post are gone.

saw on way to Eureka

Mark intact but covered by cedar branches from the fencerow.

[Photos:]
photowitness sign
Cant really see this. It is behind cedar branches.
photothe mark and gps
hard to get a good photo with all the low branches
photothe disc with powder
about the only decent shot i was able to get from above the disc
N 36° 16.245 W 093° 46.019

THE COORDINATES ARE A LITTLE OFF THE ELEVATION HAS A TYPO.
I WILL SUBMIT THE DATA TO THE NGS.

[Photos:]
photoGF0491 DISC X 51 RESET-GPS
DISC IN GOOD SHAPE.
photoGF0491 X 51 DISC
DISC IN GOOD SHAPE.
photoGF0491 DISC WP
THE DISC AND WITNESS POST.
photoGF0491 SUMMIT OF HIGHWAY
ON THE WEST ROW AT THE SUMMIT OF THE ROAD UNDER THE CEDARS.

Could not find it.

Documented History (by the NGS)

1/1/1958 by CGS (MONUMENTED)
DESCRIBED BY COAST AND GEODETIC SURVEY 1958 8.4 MI NW FROM FORUM. 8.35 MILES NORTHWEST ALONG STATE HIGHWAY 23 FROM THE VILLAGE OF FORUM, 0.4 MILE SOUTHEAST OF A TWO-STORY HOUSE WITH A LARGE RED BARN ACROSS THE ROAD, 0.25 MILE NORTHWEST OF THE JUNCTION WITH STATE HIGHWAY 12, 40 FEET WEST OF THE CENTERLINE OF THE HIGHWAY, 1.0 FOOT EAST OF A PASTURE FENCE, 24 FEET NORTH OF A FENCE CORNER AND SOUTH END OF A GATE, 12 FEET NORTH OF THE NORTH END OF A GATE AND 76 PACES EAST OF A HIGH POWER LINE AND POWER POLE IN THE PASTURE. THE DISK IS SET IN THE TOP OF A CONCRETE POST PROJECTING 8 INCHES.
1/1/1988 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1988 (CAP) RECOVERED IN GOOD CONDITION.
1/1/1989 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1989 (CEL) RECOVERED IN GOOD CONDITION.

Control Text

  • The horizontal coordinates were scaled from a topographic map and have an estimated accuracy of +/- 6 seconds.
  • The NAVD 88 height was computed by applying the VERTCON shift value to the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.) The vertical order pertains to the superseded datum.
  • The geoid height was determined by GEOID99.

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