Details for Benchmark: BR0124
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N 31° 03.296 W 081° 26.562 (NAD 83)
Altitude: 5.3
Coordinates may not be exact. Altitude is ADJUSTED and location is ADJUSTED. (more info)
- Location:
- In GLYNN county, GA View Original Datasheet
- Designation:
- F 288
- 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.
Nearest
 3/18/2009 |
Cee&Gee found  BR0124 |
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Visit Log |
Found while geocaching
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| 2/18/2009 |
3doxies found BR0124 |
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Visit Log |
Found on a geocaching and benchmark hunting trip to Brunswick.
[Photos:]
 BR0124
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| 2/18/2007 |
digian found BR0124 |
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Visit Log |
Found benchmark as described with the following change: Georgia State Route 50 is now Georgia State Route 520 and is also known as the Downing Muscgrove Causeway.
The mark is in questionable condition and the designation stamping is barely legible.
Pictures of the benchmark can be found here: (visit link) (you may need to scroll down some).
[This entry was edited by digian on Monday, February 19, 2007 at 9:00:15 AM.]
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Documented History (by the NGS)
| 1/1/1961 by CGS (MONUMENTED) |
| DESCRIBED BY COAST AND GEODETIC SURVEY 1961
7.6 MI SE FROM BRUNSWICK. 0.9 MILES EAST ON GLOUSCHESTER STREET FROM THE POST OFFICE IN BRUNSWICK TO ITS JUNCTION WITH U.S. HIGHWAY 17, THENCE 3.8 MILES SOUTH ON HIGHWAY 17, THENCE 4.9 MILES EAST ON STATE HIGHWAY 50. 18 FEET SOUTHEAST OF A DOUBLE POWER POLE, 7.5 FEET SOUTHWEST OF THE CENTER LINE OF HIGHWAY 50, 2.3 FEET NORTHEAST OF A WOODEN WITNESS POST AND 5 FEET BELOW THE LEVEL OF THE ROAD. SET IN THE TOP OF A CONCRETE POST PROJECTING 5 INCHES. |
| 1/1/1975 by USGS (MARK NOT FOUND) |
| RECOVERY NOTE BY US GEOLOGICAL SURVEY 1975
MARK NOT FOUND. |
| 1/1/1987 by NGS (GOOD) |
| RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1987 (AJL)
THE STATION WAS RECOVERED AT THIS DATE.
THE STATION IS LOCATED ABOUT 13 KM (8 MI) SOUTHEAST OF BRUNSWICK, 1.84 KM (1.15 MI) WEST OF THE WEST END OF THE BRIDGE OVER JEKYLL CREEK, ALONG THE CAUSEWAY CONNECTING JEKYLL ISLAND WITH THE MAINLAND, ON THE RIGHT-OF-WAY OF STATE HIGHWAY 50, AT THE MARSH EDGE. OWNERSHIP--STATE DEPARTMENT OF TRANSPORTATION.
TO REACH THE STATION FROM THE JUNCTION OF U.S. HIGHWAYS 17 AND 84, AND STATE HIGHWAY 50 (ABOUT 6.5 KM (4 MI) SOUTH OF BRUNSWICK, GO EAST FOR 6.86 KM (4.25 MI) ON HIGHWAY 50 TO THE WELCOME CENTER AND HIGHWAY PATROL OFFICE ON THE LEFT. CONTINUE AHEAD FOR 0.61 KM (0.4 MI) TO THE STATION ON THE RIGHT, ABOUT 100 METERS BEFORE REACHING A TRACK ROAD RIGHT LEADING TO A VOR.
THE STATION IS A STANDARD CGS DISK STAMPED---F 288 1961---, SET INTO THE TOP OF A ROUND CONCRETE MONUMENT 30 CM IN DIAMETER PROJECTING 4 CM ABOVE GROUND. LOCATED 22.2 METERS (72.8 FT) SOUTHWEST FROM THE HIGHWAY CENTER AND 1.5 METERS LOWER, 5.6 METERS (18.4 FT) SOUTHEAST FROM THE NORTHEAST ONE OF TWO UTILITY POLES CONNECTED BY CROSS BRACES, 11.7 METERS (38.4 FT) NORTHWEST FROM A LONE PALMETTO TREE, 0.3 METERS (1.0 FT) NORTHEAST FROM A FIBERGLASS WITNESS POST, AND 77.5 METERS (254.3 FT) NORTHWEST FROM A UTILITY POLE 25A.
DESCRIBED BY G.R. HEID, TYPED BY R.L. ZURFLUH. |
| 1/12/1994 by GADT (GOOD) |
| RECOVERY NOTE BY GEORGIA DEPARTMENT OF TRANSPORTATION 1994 (PRM)
THE STATION IS LOCATED ABOUT 13 KM (8.05 MI) SOUTHEAST FROM BRUNSWICK, 1.84 KM (1.15 MI) WEST FROM THE WEST END OF THE BRIDGE OVER JEKYLL CREEK, ALONG THE CAUSEWAY CONNECTING JEKYLL ISLAND WITH THE MAINLAND, ON THE RIGHT-OF-WAY OF STATE HIGHWAY 50, AT THE MARSH EDGE. OWNERSHIP--D.O.T. RIGHT-OF-WAY. TO REACH THE STATION FROM THE JUNCTION OF U.S. HIGHWAYS 17 AND 84 WITH STATE HIGHWAY 50 ABOUT 6.5 KM (4.05 MI) SOUTH OF BRUNSWICK, GO EAST ON HIGHWAY 50 FOR 6.86 KM (4.25 MI) TO THE WELCOME CENTER AND HIGHWAY PATROL OFFICE ON THE LEFT. CONTINUE AHEAD FOR 0.61 KM (0.35 MI) TO THE STATION ON THE RIGHT, ABOUT 100 METERS (328.1 FT) BEFORE REACHING A TRACK ROAD ON THE RIGHT LEADING TO A VOR. THE STATION IS A STANDARD CGS DISK STAMPED---F 288 1961---, SET INTO THE TOP OF A 30 CM DIAMETER ROUND CONCRETE MONUMENT PROJECTING 4 CM ABOVE GROUND. LOCATED 22.2 M (72.8 FT) SOUTHWEST FROM AND 1.5 M (4.9 FT) BELOW THE HIGHWAY CENTERLINE, 5.6 M (18.4 FT) SOUTHEAST FROM THE NORTHEAST ONE OF TWO UTILITY POLES CONNECTED BY CROSS BRACES, 11.7 M (38.4 FT) NORTHWEST FROM A LONE PALMETTO TREE, 0.3 M (1.0 FT) NORTHEAST FROM A FIBERGLASS WITNESS POST, AND 77.5 M (254.3 FT) NORTHWEST FROM A UTILITY POLE 25A. |
| 6/12/1994 by NGS (GOOD) |
| RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1994 (JRO)
RECOVERED IN GOOD CONDITION, ADDING THAT MARK IS 27 FT (8.2 M) EAST OF HIGHER POLE 113, 18 FT (5.5 M) SE OF LOWER POLE 8182. |
| 6/5/1996 by NGS (GOOD) |
| RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1996 (JRO)
RECOVERED AS DESCRIBED IN 1987 AND 1994. |
Control Text
- The horizontal coordinates were established by GPS observations and adjusted by the National Geodetic Survey in September 1997.
- The orthometric height was determined by differential leveling and adjusted by the National Geodetic Survey in June 1991.
- 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.
- 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.
