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Details for Benchmark: AG6034

N 27° 56.867 W 082° 27.433 (NAD 83)

Altitude: 18.67

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

Location:
In HILLSBOROUGH county, FL View Original Datasheet
Designation:
TAMPA
Marker Type:
bench mark disk
Setting:
footings/foundation walls of small/medium structures
Stability:
May hold, but of type commonly subject to surface motion.

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Cachin' in Tampa when I spotted this on the wall and had to check it out.

[Photos:]
photoBenchmark Tampa

Found it in a very interesting building.

Found as described.

[Photos:]
photoTampa - AG6034
photoTampa - AG6034

one of several benchmarks in town...this one is a disk though....

[Photos:]
photo1.17.9 - 174 (Small)

Spent the morning waymarking in downtown Tampa and this was very easily found and in perfect condition.

[Photos:]
photoCity Hall Benchmark

found this while waymarking downtown Tampa.

[Photos:]
photoAG6034
photo274f4648-31da-4bad-b7dc-9ed65b746ef2

found on a morning bike ride

Found it today 1:27p. Skyboy01

[Photos:]
photoAG6034
AG6034 TAMPA Skyboy01

Found it!

Found this after visiting some friends downtown.

[Photos:]
photoAG6034

The designation and date are stamped upside down.

[Photos:]
photoAG6034
photoAG6034 location

Found it!

Easy find on the wall.

[Photos:]
photoAG6034 Area
photoAG6034
N 27° 56.871 W 082° 27.412

Been there, done that. Took Picture, left nothing.

[Photos:]
photoRecovered

Documented History (by the NGS)

1/1/1932 by CGS (MONUMENTED)
1/1/1966 by NGS (GOOD)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1966 AT TAMPA. AT TAMPA, NEAR THE INTERSECTION OF KENNEDY BOULEVARD AND FLORIDA AVENUE, AT THE TAMPA CITY HALL, 22.3 FEET SOUTH OF THE SOUTH CURB OF THE BOULEVARD, 10.2 FEET WEST OF THE WEST CURB OF THE AVENUE, SET VERTICALLY IN THE EAST FACE 4.3 FEET SOUTH OF THE NORTHEAST CORNER OF THE BUILDING AND ABOUT 0.9 FOOT ABOVE THE LEVEL OF THE SIDEWALK.
1/1/1978 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1978 RECOVERED IN GOOD CONDITION.
1/1/1982 by FLDNR (GOOD)
RECOVERY NOTE BY FL DEPT OF NAT RES 1982 RECOVERED IN GOOD CONDITION.
1/1/1990 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1990 (AMM) RECOVERED IN GOOD CONDITION.
4/7/1990 by FLDNR (GOOD)
RECOVERY NOTE BY FL DEPT OF NAT RES 1990 THE MARK IS LOCATED IN DOWNTOWN TAMPA, AT THE INTERSECTION OF KENNEDY BLVD AND FLORIDA AVENUE NORTH, AND IS SET VERTICALLY IN THE NORTHEAST CORNER OF THE EAST SIDE OF THE OLD CITY HALL BUILDING. TO REACH THE MARK FROM THE INTERSECTION OF STATE ROAD 60 (KENNEDY BLVD)AND BUSINESS U.S. 41 (KENNEDY BLVD), AND STATE ROAD 45 NORTH (NEBRASKA), GO WEST ON KENNEDY BLVD 0.40 MI (0.64 KM) TO THE INTERSECTION OF KENNEDY AVENUE AND FLORIDA AVENUE, THE OLD CITY HALL AND THE MARK ON THE LEFT. THE MARK IS SET VERTICALY IN THE NORTHEAST CORNER OF THE EAST SIDE OF THE OLD CITY HALL BUILDING. 40.7 FT (12.41 M) WEST OF THE CENTERLINE OF FLORIDA AVENUE, 50.5 FT (15.39 M) SOUTH OF CENTERLINE OF KENNEDY BLVD, 4.3 FT (1.31 M) SOUTH OF THE NORTHEAST CORNER OF THE OLD CITY HALL. THE MARK IS SET VERTICAL 1.0 FT (0.30 M) ABOVE THE SIDE WALK.

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 June 1991. 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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