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Details for Benchmark: AG0020

N 27° 57.917 W 082° 39.783 (NAD 83)

Altitude: 4.15

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

Location:
In PINELLAS county, FL View Original Datasheet
Designation:
147 FLHD
Marker Type:
survey disk
Setting:
light structures
Stability:
Mark of questionable or unknown stability.

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i too saw this--after the clarwater traverses led me to it.

[Photos:]
photoC:\Documents and Settings\ME\Desktop\Tampa Stuff\P

Found a disk on the sea wall at the stated coordinates. Markings on the disk are hard to make out. See photo. Skyboy01

[Photos:]
photo147 FLHD
Markings hard to read on disk and are not same as described. Skyboy01

Documented History (by the NGS)

Unknown by FLHD (MONUMENTED)
01/01/1975 by FLDT (GOOD)
DESCRIBED BY FLORIDA DEPARTMENT OF TRANSPORTATION 1975 AT CLEARWATER. TO REACH STATION FROM THE JUNCTION OF U.S. HIGHWAY 19 AND S.R. 60 (GULF TO BAY BLVD.), RUN EASTERLY ON S.R. 60 FOR 4.25 MILES. STATION ON RIGHT, 97.5 FT. EAST OF A 10 INCH PINE TREE. SET IN TOP OF THE CONCRETE SEAWALL. SECTION 13, T29S, R16E.

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.
  • 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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