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Details for Benchmark: GG0056

N 36° 25.167 W 094° 03.050 (NAD 83)

Altitude: 1267.49

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

Location:
In BENTON county, AR View Original Datasheet
Designation:
RV 4
Marker Type:
rivet
Setting:
massive structures
Stability:
Probably hold position/elevation well.

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MARK RECOVERED IN GOOD SHAPE.

LOGGING FOR BENCHMARK CONTEST.

NGS REPORT TO FOLLOW.

[Photos:]
photoGG0056 RV 4 GPS
BENCHMARK GG0056 RV 4 GPS
photoGG0056 RV 4 S
BENCHMARK GG0056 RV 4 LOOKING SOUTH

FOUND IN GOOD SHAPE.
NGS REPORT FILED.
GOT THIS ONE FOR THE BENCHMARK COMPETITION.
HAD THE BELLA*CACHER WITH ME AGAIN TODAY.

[This entry was edited by GEO*Trailblazer 1 on Thursday, November 03, 2005 at 9:45:27 PM.]

[Photos:]
photoGG0056 RV 4 GPS
GPS READING AT RIVET.
photoGG0056 RV 4 PDA
PDA AND DATE.
photoGG0056 RV 4 RIVET
LOOKING EASTERLY
N 36° 25.193 W 094° 03.061

The North Abutment is "U" shaped. I found the Rivet in the center of and 1' from the North end of the West Leg of the concrete North Abutment. It is also 5' from the near rail. The Rivet is not completely seated as about 3/8 Inch of the rivet shaft is exposed.

[Photos:]
photoRV 4 North of Avoca, AR. on M&A RR.
photoRV 4 North of Avoca, Arkansas background.
photoRV 4 background North of Avoca, Arkansas.

Documented History (by the NGS)

Unknown by SLSFRR (MONUMENTED)
01/01/1961 by NGS (GOOD)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1961 2.1 MI N FROM AVOCA. 2.1 MILES NORTH ALONG THE ST. LOUIS-SAN FRANCISCO RAILWAY FROM AVOCA, BENTON COUNTY, 5-1/2 POLES SOUTH OF MILEPOST 325, ON THE WEST SIDE OF THE TRACK, AT BRIDGE 325.2 OVER SUGAR CREEK, AND IN THE TOP OF THE NORTH ABUTMENT. A STANDARD MONEL-METAL RIVET.
01/01/1987 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1987 (MFS) RECOVERED IN GOOD CONDITION.
01/01/1987 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1987 (TWS) RECOVERED IN GOOD CONDITION.
01/01/1987 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1987 (VWK) RECOVERED IN GOOD CONDITION.

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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