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Details for Benchmark: GG0808

N 36° 23.070 W 095° 33.738 (NAD 83)

Altitude: 788

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

Location:
In ROGERS county, OK View Original Datasheet
Designation:
COWARDIN
Marker Type:
survey disk
Setting:
setting not listed - see description
Stability:

Reference Points

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My GPS notes show there was a log from 1997 by ODOT that mark appears to be under a trailer house. Since it has been 11 years, I went to confirm. Trailer house still over top of where mark appears to be from description. Don't know what happened to ODOT log?

Documented History (by the NGS)

01/01/1968 by USGS (MONUMENTED)
DESCRIBED BY US GEOLOGICAL SURVEY 1968 (FJH) THE STATION IS LOCATED APPROX. 5.0 MI N. AND 3.0 MI E. OF CLAREMORE, T. 22 N., R. 16 E., NEAR THE S. SIXTEENTH CORNER BETWEEN SECS. 13 AND 14, ON THE PROPERTY OF LAND OWNED BY MR. J. C. COWARDIN, IN CLEARED FIELD ON N. SIDE OF THE RD. DIRECTLY ACROSS RD. FROM HOME OF MR. J. C. COWARDIN WHICH IS ON THE S. SIDE OF RD. TO REACH THE STATION FROM THE JUNCTION OF U.S. HWY. 66 AND WILL ROGERS AVE. IN CLAREMORE, GO NORTHEASTWARD ALONG HWY. 66 FOR 6.1 MI TO A T-RD. W., TURN LEFT (W.) CROSS RR. TRACKS AND GO 0.4 MI ALONG COUNTY RD. TO A WYE RD. SE., TAKE THE LEFT (W.) FORK AND GO 0.1 MI TO TOP OF HILL AND STATION INSIDE OF FENCE ON THE RIGHT (N.) SIDE OF THE RD. THE STATION MARK IS 71 FT N. OF CENTER OF RD., 52 FT N. OF E.-W. FENCE, 44 FT W. OF N.-S. FENCE, 71 FT N. AND 11 FT E. OF CENTER OF RD. OPPOSITE HOUSE, 52 FT N. OF STANDARD USGS WITNESS POST. STAMPED ET COWARDIN 1968. REFERENCE MARK NO. 1 IS E. OF THE STATION, 75 FT N. OF CENTER OF RD., 49 FT N. OF E.-W. FENCE, 1 FT W. OF N.-S. FENCE, 75 FT N. AND 55 FT E. OF THE CENTER OF RD. OPPOSITE HOUSE, STAMPED COWARDIN NO 1 1968. REFERENCE MARK NO. 2 IS S. OF THE STATION, 21 FT N. OF CENTER OF RD., 1 FT N. OF E.-W. FENCE, 40 FT W. OF N.-S. FENCE, 21 FT N. AND 10 FT E. OF THE CENTER OF THE RD. OPPOSITE HOUSE, 1 FT N. OF STANDARD USGS WITNESS POST. STAMPED COWARDIN NO 2 1968. AZIMUTH MARK--NONE SET. REFERENCE AZIMUTH--NONE VISIBLE FROM GROUND. ALL MARKS ARE FLUSH WITH THE GROUND, STANDARD TABLETS CRIMPED ON 0.5 IN. COPPER COATED RODS, CENTERED IN 6 IN. DIAMETER TILE, 12 IN. LONG, FILLED WITH GRAVEL TO WITHIN 1 IN. OF CAP.

Control Text

  • The horizontal coordinates were established by classical geodetic methods and adjusted by the National Geodetic Survey in November 1994.
  • The NAVD 88 height was computed by applying the VERTCON shift value to the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.)
  • The Laplace correction was computed from DEFLEC99 derived deflections.
  • The geoid height was determined by GEOID99.

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