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Details for Benchmark: AF7104

N 27° 59.100 W 081° 10.067 (NAD 83)

Altitude: 74.51

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

Location:
In OSCEOLA county, FL View Original Datasheet
Designation:
OS 61 SFLWMD
Marker Type:
bench mark disk
Setting:
retaining walls, concrete ledge, etc.
Stability:
May hold, but of type commonly subject to surface motion.

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N 27° 59.120 W 081° 10.138

Found this mark while caching and benchmark hunting in the area. This is one of the smaller disk we have seen.

[This entry was edited by Team MACE on Monday, August 01, 2005 at 6:58:28 PM.]

[Photos:]
photoAF7104
photoAF7104 Area

Found as described.

[Photos:]
photoThe mark
N 27° 59.119 W 081° 10.134

Along Canoe Creek Road on a culvert.

[Photos:]
photoAF7104
Mark
photoAF7104
Culvert

Documented History (by the NGS)

Unknown by SFLWMD (MONUMENTED)
01/01/1983 by FLDNR (GOOD)
DESCRIBED BY FL DEPT OF NAT RES 1983 14.0 MI WNW FROM KENANSVILLE. BEGIN AT THE INTERSECTION OF U.S. HIGHWAY 441 AND STATE ROAD 523 (CANOE CREEK ROAD) IN KENANSVILLE, GO 14.0 MILES NORTH AND WEST ALONG STATE ROAD 523 TO THE MARK. THE MARK IS SET FLUSH IN A CONCRETE CULVERT. THE MARK BEARS 20.4 FEET NORTHEAST OF THE CENTERLINE OF STATE ROAD 523, 8.2 FEET NORTHWEST OF THE SOUTHWEST END OF THE CULVERT, AND 7.8 FEET SOUTHWEST OF THE NORTHWEST END OF THE CULVERT. THE SURVEY DISK IS 1.25 INCHES IN DIAMETER.

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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