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Details for Benchmark: BR0964

N 31° 46.874 W 081° 23.018 (NAD 83)

Altitude: 15

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

Location:
In LIBERTY county, GA View Original Datasheet
Designation:
CHESTER 3 RM 10
Marker Type:
reference mark disk
Setting:
set into the top of a round concrete monument
Stability:
May hold, but of type commonly subject to surface motion.

Reference Points

Must Read!

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Oops. I found that one too. But, that's not RM 10! It's either 8 or 9. According to the page for BR1256 "ON RM 8 THE 8 OVERSTAMPED A 7 AND ON RM 9 AN 8 WAS X-ED OUT." I'm guessing that this is RM 8, not RM10. Oh, well.

[Photos:]
photoChester RM 8 Not in geocaching

Cool! It's there and fairly obvious; curious that no one has stopped by and logged it before. JP

[Photos:]
photoReference Mark
photoIn situ

Documented History (by the NGS)

01/01/1983 by GADT (MONUMENTED)
DESCRIBED BY GEORGIA DEPARTMENT OF TRANSPORTATION 1983 (WRN) THE STATION IS ABOUT 5.3 KM (3.2 MI) SOUTHEAST FROM MIDWAY, 6.8 KM (4.25 MI) NORTH-NORTHEAST FROM RICEBORO, AND 9.7 KM (6 MI) WEST FROM SUNBURY. OWNERSHIP--W.J. MARTIN, ROUTE 167, MIDWAY, GEORGIA. TELEPHONE 912-364-5844. TO REACH THE STATION FROM THE JUNCTION OF INTERSTATE HIGHWAY 95 AND U.S. HIGHWAY 82 (STATE ROUTE 38) ABOUT 5.65 KM (3.5 MI) SOUTHEAST FROM MIDWAY, GO WESTERLY ALONG U.S. HIGHWAY 82 FOR 0.65 KM (0.4 MI) TO THE JUNCTION OF A PAVED DRIVEWAY TO THE RIGHT, A SIGN MARTINS PONDS AND THE STATION ON THE LEFT. MR MARTIN LIVES IN THE HOUSE 0.65 KM (0.4 MI) NORTH ALONG THE DRIVEWAY. THE STATION IS A STANDARD NGS REFERENCE MARK DISK STAMPED---CHESTER 3 1977 RM 10 1983---, SET INTO THE TOP OF A ROUND CONCRETE MONUMENT 30.5 CM IN DIAMETER AND FLUSH WITH THE SURFACE OF THE GROUND. IT IS LOCATED 24.69 METERS (81 FT) NORTHEAST FROM THE CENTERLINE OF THE HIGHWAY, 14.48 METERS (47.5 FT) NORTHWEST FROM THE CENTERLINE OF THE PAVED DRIVEWAY, 8.7 METERS (28.5 FT) NORTHEAST FROM A WOODEN FENCE, 20.42 METERS (67 FT) NORTH FROM AN 18 INCH CONCRETE PIPE UNDER A DRIVEWAY TO THE NORTH, AND 1.83 METERS (6 FT) NORTH-NORTHWEST FROM A METAL WITNESS POST. THE UNDERGROUND STATION IS A STANDARD NGS REFERENCE MARK DISK STAMPED---CHESTER 3 1977 RM 10 1983---, SET IN AN IRREGULAR MASS OF CONCRETE 1.04 METERS BELOW THE SURFACE OF THE GROUND. CHESTER 3 1977 IS A STANDARD NGS TRIANGULATION STATION DISK STAMPED---CHESTER 3 1977---, SET INTO THE TOP OF A ROUND CONCRETE MONUMENT 30.5 CM IN DIAMETER AND FLUSH WITH THE SURFACE OF THE GROUND. IT IS LOCATED 15.85 METERS (52 FT) NORTHEAST FROM THE CENTERLINE OF THE HIGHWAY, 33.83 METERS (111 FT) NORTHWEST FROM THE CENTERLINE OF MARTINS FISH POND ROAD MEASURED ALONG THE FENCELINE, AND 0.3 METER (1 FT) WEST FROM A METAL WITNESS POST. THE UNDERGROUND MARK IS A STANDARD NGS TRIANGULATION STATION DISK STAMPED---CHESTER 3 1977---, SET IN AN IRREGULAR MASS OF CONCRETE 0.91 METER BELOW THE SURFACE OF THE GROUND. CHESTER 3 1977 RM 8 IS A STANDARD NGS REFERENCE MARK DISK STAMPED---CHESTER 3 1977 NO 8---, SET INTO THE TOP OF A ROUND CONCRETE MONUMENT 30.5 CM IN DIAMETER AND FLUSH WITH THE SURFACE OF THE GROUND. IT IS LOCATED 15.85 METERS (52 FT) NORTHEAST FROM THE CENTERLINE OF THE HIGHWAY, 14.94 METERS (49 FT) NORTHWEST FROM THE CENTERLINE OF MARTINS FISH POND ROAD MEASURED ALONG THE DRIVEWAY, AND 0.33 METER (1 FT) NORTHEAST FROM A METAL WITNESS POST. CHESTER 3 1977 RM 9 IS A STANDARD NGS REFERENCE MARK DISK STAMPED---CHESTER 3 1977 NO 9---, SET INTO THE TOP OF A ROUND CONCRETE MONUMENT 30.5 CM IN DIAMETER AND FLUSH WITH THE SURFACE OF THE GROUND. IT IS LOCATED 49.38 METERS (162 FT) NORTHWEST FROM THE CENTERLINE OF MARTINS FISH POND ROAD MEASURED ALONG THE FENCELINE, 15.85 METERS (52 FT) NORTHEAST FROM THE CENTERLINE OF THE HIGHWAY, 34.79 METERS (123 FT) EAST FROM A POWER POLE, AND 0.33 METER (1 FT) EAST FROM A METAL WITNESS POST. CHESTER 3 1977 AZ MK IS A STANDARD NGS AZIMUTH MARK DISK STAMPED---CHESTER 3 1977---, SET INTO THE TOP OF A ROUND CONCRETE MONUMENT 30.5 CM IN DIAMETER AND FLUSH WITH THE SURFACE OF THE GROUND. IT IS LOCATED 17.16 METERS (56.3 FT) NORTHEAST FROM THE CENTERLINE OF THE HIGHWAY, 20.79 METERS (68.2 FT) SOUTHEAST FROM THE SOUTHEAST CORNER OF A FRAME HOUSE, 1.83 METERS (6 FT) NORTHEAST FROM A FENCE CORNER, AND 0.85 METER (2.8 FT) SOUTHEAST FROM A METAL WITNESS POST. TO REACH CHESTER 3 1977 AZ MK FROM THE STATION PROCEED GOING NORTHWEST ALONG STATE ROUTE 38 FOR 0.5 KM (0.3 MI) TO THE MARK ON THE RIGHT. CHESTER 3 1977 AZ MK 2 IS A STANDARD NGS AZIMUTH MARK DISK STAMPED---CHESTER 3 1977 NO 2 1983---, SET INTO THE TOP OF A ROUND CONCRETE MONUMENT 30.5 CM IN DIAMETER AND FLUSH WITH THE SURFACE OF THE GROUND. IT IS LOCATED 26.08 METERS (85.5 FT) SOUTHEAST FROM THE EAST END OF A CONCRETE PIPE UNDER A DRIVEWAY TO THE SOUTH, 14.01 METERS (46 FT) SOUTHWEST FROM THE CENTERLINE OF THE HIGHWAY, 31.37 METERS (102.9 FT) WEST FROM THE WEST END OF A CONCRETE PIPE UNDER A DRIVEWAY TO THE NORTH, AND 0.7 METER (2.3 FT) NORTH-NORTHEAST FROM A WITNESS POST. THE UNDERGROUND MARK IS A STANDARD NGS AZIMUTH MARK DISK STAMPED---CHESTER 3 1977 NO 2 1983---, SET IN AN IRREGULAR MASS OF CONCRETE 1.04 METERS BELOW THE SURFACE OF THE GROUND. TO REACH CHESTER 3 1977 AZ MK 2 FROM THE STATION PROCEED GOING WEST ALONG STATE ROUTE 38 FOR 0.65 KM (0.4 MI) TO THE AZIMUTH MARK NO 2 ON THE LEFT NEXT TO THE TREE LINE. HEIGHT OF LIGHT SHOWN ABOVE THE STATION WAS 38.4 METERS. COUNTY ROAD NUMBERS OBTAINED FROM--GENERAL HIGHWAY MAP LIBERTY COUNTY GEORGIA 1975. REVISED AUGUST 1976. DESCRIBED BY T.B. KNIGHT.
01/01/1985 by GADT (GOOD)
RECOVERY NOTE BY GEORGIA DEPARTMENT OF TRANSPORTATION 1985 (WRN) THE STATION WAS RECOVERED AT THIS DATE. THE STATION, CHESTER 1977, REFERENCE MARKS 8 AND 9, AND THE AZIMUTH MARKS 1 AND 2 WERE FOUND IN GOOD CONDITION AS DESCRIBED IN 1983. THE STATION WAS OCCUPIED BY THE GLOBAL POSITIONING SYSTEM FOR CONTROL OF PROJECT VICINITY OF GLENNVILLE GEORGIA AREA. DESCRIBED BY W. R. NEAL.

Control Text

  • The horizontal coordinates were established by GPS observations and adjusted by the National Geodetic Survey in September 1997.
  • The NAVD 88 height was computed by applying the VERTCON shift value to the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.)
  • The X, Y, and Z were computed from the position and the ellipsoidal ht.
  • The Laplace correction was computed from DEFLEC99 derived deflections.
  • The ellipsoidal height was determined by GPS observations and is referenced to NAD 83.
  • The geoid height was determined by GEOID99.

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