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Details for Benchmark: GF0876

N 36° 29.269 W 093° 52.793 (NAD 83)

Altitude: 1457

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

Location:
In BENTON county, AR View Original Datasheet
Designation:
SPIDER
Marker Type:
triangulation station disk
Setting:
set into the top of a round concrete monument
Stability:

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Searched for but did not locate Spider, the RM's or the AZ.

MARK IN GOOD SHAPE.
FOUND STATION REFERENCE MARK 1 WITH JUST A STEM AND REFERENCE MARK 2 IN GOOD SHAPE.
AZIMUTH SEARCHED FOR BUT NOT FOUND THIS DATE.

LOGGING FOR CONTEST.

NGS REPORT TO FOLLOW.

[Photos:]
photoGF0876 SPIDER GPS
BENCHMARK GF0876 SPIDER TRIANGULATION AND GPS
photoGF0876 SPIDER STATION
BENCHMARK GF0876 SPIDER TRIANGULATION STATION
photoGF0876 SPIDER RM 2
BENCHMARK GF0876 SPIDER REFERENCE MARK 2
photoGF0876 SPIDER RM 1
BENCHMARK GF0876 SPIDER RM 1

I found the Station, RM 2 and the remains of RM 1.

RM 2: 113 feet and a Bearing of 244 degrees from the Station. It is 22 feet NE of power pole # P22801761 and protrudes 5 inches.

RM 1: I found the base and the stem 30 feet and a Bearing of about 90 degrees from the Station. It should be about 80 feet and a Bearing of about 90 degrees from the Station. There is a driveway where the disk should have been and I suspect the remains have been bulldozed to their present location.

The Station is in good shape as described. I tied some red flagging in a cedar bush over the disk.

Azimuth: It appears to heve been destroyed possibly when HY 62 in the area of the Azimuth was rerouted to go through the hill rather than around it as before.

[Photos:]
photoSpider Triangulation Station near Gateway, Ark.
photoSpider Triangulation Station near Gateway, Ark.
Background, looking South across Hy. 62.
photo Remains of Spider Tri. Sta. RM 1.
The remains of a ore zip code witness marker are also in the picture.
photoRemains of Spider Tri. Sta. RM 1.
Background looking SE across Hy. 62.
photoSpider Tri. Sta. RM 2.
photoSpider Tri. Sta. RM 2.
Background looking across Hy. 62 toward Station.

The monument is there but the brass cap is gone.Will return,did not find the azimuth or the references yet.

[Photos:]
photoSpider Triangulation Station
The cement monument is still there but the cap has been removed.Will return to look for ref's and azimuth.The witness post behind the monument in the picture was recoverd but not in good shape.There is a large tree in the area of the other monument that has fallen down.
photoSpider Triangulation Station West
The Spider is watching the sun go down.
photoSpider Triangulation Station Easterly
Towards Eureka Springs.
photoSpider Triangulation Station SouthWesterly
Southwesterly into the Sunset.

Documented History (by the NGS)

01/01/1961 by CGS (MONUMENTED)
DESCRIBED BY COAST AND GEODETIC SURVEY 1961 (BRB) ABOUT 10 MILES NORTHWEST OF EUREKA SPRINGS, ABOUT 4 MILES EAST OF GATEWAY, ABOUT 1 MILE SOUTH OF THE MISSOURI-ARKANSAS STATE LINE, IN THE SOUTHWEST 1/4 OF SEC. 17, T. 21 N., R. 27 W., AND ON HIGHWAY RIGHT-OF-WAY. IT IS 46 FEET NORTH OF THE CENTERLINE OF U.S. HIGHWAY 62, 16 FEET SOUTH OF AN 8 INCH OAK TREE WITH A TRIANGULAR BLAZE ON THE SOUTH SIDE AND 6 FEET NORTH OF A WITNESS POST. THE MONUMENT PROJECTS 2 INCHES AND THE DISK IS STAMPED SPIDER 1961. TO REACH FROM THE JUNCTION OF U.S. HIGHWAY 62 AND STATE HIGHWAY 47 IN GATEWAY, GO EASTERLY ON U.S. HIGHWAY 62 FOR 3.8 MILES TO THE HIGH ACRES FARM ON THE LEFT. CONTINUE EASTERLY ON HIGHWAY 62 FOR 0.35 MILE TO THE STATION ON THE LEFT, IMMEDIATELY BEYOND WHERE HIGHWAY MAKES SHARP CURVE TO LEFT. TO REACH THE AZIMUTH FROM THE STATION, GO EASTERLY ON HIGHWAY 62 FOR 0.7 MILE TO THE AZIMUTH MARK ON THE RIGHT. REFERENCE MARK 1 IS 47 FEET NORTH OF THE CENTERLINE OF HIGHWAY 62, AND 80 FEET EAST OF THE WITNESS POST. THE MONUMENT IS FLUSH AND THE DISK IS STAMPED SPIDER NO 1 1961. REFERENCE MARK 2 IS 36 FEET SOUTH OF THE CENTERLINE OF HIGHWAY 62, 22 FEET NORTHEAST OF A POWER POLE AND 5 FEET NORTHWEST OF A 10 INCH OAK TREE. THE MONUMENT PROJECTS 10 INCHES AND THE DISK IS STAMPED SPIDER NO 2 1961. THE AZIMUTH MARK IS 28 FEET SOUTH OF THE CENTERLINE OF HIGHWAY 62, 27 FEET NORTHWEST OF A NORTH GATE POST, 25 FEET NORTHWEST OF THE CENTERLINE OF A GRAVELED DRIVEWAY, 2 FEET NORTH OF A BOARD FENCE AND 1 FOOT NORTH OF A WITNESS POST. THE MONUMENT PROJECTS 3 INCHES AND THE DISK IS STAMPED SPIDER 1961. NO MEASUREMENT BETWEEN RMS, HIGH BANK. HEIGHT OF LIGHT ABOVE STATION MARK 1 METERS.
01/01/1987 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1987 (TWS) RECOVERED IN GOOD CONDITION.
01/01/1988 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1988 (RAN) RECOVERED IN GOOD CONDITION.

Control Text

  • The horizontal coordinates were established by classical geodetic methods and adjusted by the National Geodetic Survey in September 1999.
  • The orthometric height was scaled from a topographic map.
  • The Laplace correction was computed from DEFLEC99 derived deflections.
  • The geoid height was determined by GEOID99.

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