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Details for Benchmark: AQ0281

N 29° 53.483 W 081° 18.917 (NAD 83)

Altitude: 5.75

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

Location:
In ST JOHNS county, FL View Original Datasheet
Designation:
W 223
Marker Type:
bench mark disk
Setting:
copper-clad steel rod
Stability:
Probably hold position/elevation well.

Must Read!

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Saw this benchmark while caching in the area.

[Photos:]
photoAQ0281

Found with team E88

[Photos:]
photoBM
photoBM

Doing the tourist thing with Mr. and Mrs. Magic. . Spotted this on our rounds.

[Photos:]
photo

Found it 4/15/16 at 11:05a.

[Photos:]
photoW 223
photoBM pic using baby powder
photoArea photo
N 29° 53.527 W 081° 18.840

We found this Benchmark on our tour through St. Augustine. It was an easy find beceause of the good description and the pictures from the other users. As already described, it is a little bit bent.

[Photos:]
photoAQ0281 environment 1
photoAQ0281 environment 2
photoAQ0281 close up

Found in good condition while in the area.

[Photos:]
photoP2090070

Have never seen so many benchmarks in one area like in St. Augustine.

N 29° 53.530 W 081° 18.840

Found.

N 29° 53.530 W 081° 18.840

Bent a little, but still there, in the flowerbed haha.

Found as described.

[Photos:]
photoAQ0821

this one is in very good condishen

[Photos:]
photoaq0281

My son saw this one. After doing a nearby cache.

Found while checking out another benchmark site. Benchmark was about 4 inches off the ground on a rod and it looks like someone has bent down one of the sides, maybe stepped on it, but still in really good shape.

Found while walking around town at night. Coords are way off. They read somewhere by the building but are wrong.

Found!

As described.

Found this one while spending weekend in the area.The only one i actualy worked out a sweat

Found as described.

larry71150 12/7/04
Found this one rather easily. It is in good shape.

Found It: Our GPSr read: N 29° 53.521 W 081° 18.844.

[Photos:]
photoAQ0281 - 01.JPG
photoAQ0281 - 02.JPG
photoAQ0281 - 03.JPG

Documented History (by the NGS)

01/01/1964 by CGS (MONUMENTED)
DESCRIBED BY COAST AND GEODETIC SURVEY 1964 AT ST AUGUSTINE. 0.25 MILE WEST ALONG KING STREET FROM THE WEST END OF THE BRIDGE OF LIONS OVER THE MANTANZAS RIVER, SET IN THE NORTHEAST CORNER OF THE LIGHTNER EXPOSITION PARK, 42 FEET SOUTHWEST OF THE INTERSECTION OF CORDOVA AND KING STREETS, 31 FEET WEST OF THE CENTER LINE OF CORDOVA STREET, 28 FEET SOUTH OF THE CENTER LINE OF KING STREET, 7 INCHES SOUTH OF THE SOUTHEAST CORNER OF THE EAST CONCRETE GATE POST, AND IS A DISK ON TOP OF A COPPER COATED STEEL ROD FLUSH WITH THE GROUND PROTECTED BY A 4-INCH TILE PROJECTING 4 INCHES. THE ROD WAS DRIVEN TO REFUSAL TO A DEPTH OF 68 FEET. NOTE-- MARK MAY HAVE BEEN REPLACED DURING EXCAVATION OF 1973.
01/01/1975 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1975 RECOVERED IN GOOD CONDITION.
01/01/1989 by USPSQD (MARK NOT FOUND)
RECOVERY NOTE BY US POWER SQUADRON 1989 (JD) MARK NOT FOUND.
03/03/1991 by USPSQD (MARK NOT FOUND)
RECOVERY NOTE BY US POWER SQUADRON 1991 (JD) MARK NOT FOUND.
03/24/1991 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1991 IN SAINT AUGUSTINE, AT THE INTERSECTION OF KING AND CORDOVA STREETS, NEAR THE EAST END OF A TRIANGULAR PLANTER BOX, 9.7 M (31.8 FT) WEST OF THE CENTERLINE OF CORDOVA STREET, 8.4 M (27.6 FT) SOUTH OF AND LEVEL WITH THE CENTERLINE OF KING STREET, 2.7 M (8.9 FT) SOUTHEAST OF THE NORTHEAST CORNER OF A COQUINA ROCK PILLAR, AND 0.6 M (2.0 FT) NORTHWEST OF A SIGNAL LIGHT POLE. NOTE--THE DISK IS ENCASED IN A 4-INCH TILE PIPE (FILLED WITH CONCRETE) THAT PROJECTS 0.1 M (0.3 FT) ABOVE THE GROUND SURFACE.

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 May 1994. WARNING-Repeat measurements at this control monument indicate possible vertical movement.
  • 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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