Details for Benchmark: AA7615
N 30° 14.500 W 084° 18.150 (NAD 83)
Coordinates may not be exact. Altitude is ADJUSTED and location is SCALED. (more info)
- In WAKULLA county, FL View Original Datasheet
- FHOT 001
- Marker Type:
- survey disk
- abutments and piers of large bridges
- Probably hold position/elevation well.
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Documented History (by the NGS)
|01/01/1990 by FLDNR (MONUMENTED)
|DESCRIBED BY FL DEPT OF NAT RES 1990 (RLM)
THE BENCH MARK IS LOCATED APPROXIMATLY 14 MI (22.5 KM) SOUTH OF TALLAHASSEE, 5.0 MI (8.0 KM) SOUTHWEST OF WAKULLA, AT WAKULLA SPRINGS STATE PARK. CONTACT DICK MILLER AT THE PARK ENTRANCE FOR ACCESS TO THE MARK. TO REACH THE BENCH MARK FROM THE INTERSECTION OF STATE ROAD 61 AND STATE ROAD 267 NEAR WAKULLA IN WAKULLA COUNTY FLORIDA GO EAST ON STATE ROAD 267 FOR 0.1 MI (0.2 KM) TO THE ENTRANCE TO WAKULLA SPRINGS STATE PARK TURN RIGHT AND GO SOUTH INTO THE PARK FOR 0.25 MI (0.40 KM) TO THE ENTRANCE BOOTH CONTINUE PAST THE ENTRANCE BOOTH ALONG THE PARK ROAD FOR 0.9 MI (1.4 KM) TO ITS INTERSECTION WITH ANOTHER PAVED PARK ROAD CONTINUE THROUGH THE INTERSECTION FOR ANOTHER 0.4 MI (0.6 KM) TO A CONCESSION BOOTH AND A SIDEWALK TO THE TOUR BOATS, ON FOOT PROCEED THROUGH THE CONCESSION BOOTH DOWN THE SIDEWALK TO THE TOUR BOATS AND BOAT OFFICE WALK PAST THE TOUR BOAT OFFICE TO THE WEST END OF THE BUILDING TURN NORTH AND WALK TO THE NORTH END OF A CONCRETE PIER, THE MARK IS SET IN THE NORTHWEST CORNER OF THE PIER. THE MARK IS SET 3.4 FT (1.0 M) SOUTHEAST OF THE NORTHWEST CORNER OF A CONCRETE PIER, 36 FT (11.0 M) WEST OF THE EAST END OF THE CONCRETE PIER, 17.7 FT (5.4 M) NORTH OF THE SOUTHWEST CORNER OF THE CONCRETE PIER.
- 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 December 1996.
- 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.