Skip to Content

Details for Benchmark: AA0375

N 24° 47.467 W 080° 53.067 (NAD 83)

Altitude: 14.32

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

Location:
In MONROE county, FL View Original Datasheet
Designation:
Q 69 RESET
Marker Type:
bench mark disk
Setting:
retaining walls, concrete ledge, etc.
Stability:
May hold, but of type commonly subject to surface motion.

Must Read!

Benchmarks may be on private property or in dangerous locations. Obey local laws. By using the services on Geocaching.com you agree to this disclaimer.

Found while searching for a few nearby Geocaches

[Photos:]
photoAA0375

On way back from buying MORE bike parts. Blowing day, water is stirred up.

[Photos:]
photoClose up
photoBM in foreground, Note new fishing piers

Documented History (by the NGS)

1/1/1936 by CGS (MONUMENTED)
1/1/1966 by NGS (GOOD)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1966 4.9 MI SW FROM LAYTON. 4.9 MILES SOUTHWEST ALONG U.S. HIGHWAY 1 FROM THE POST OFFICE AT LAYTON, NEAR THE NORTHEAST END OF CONCH KEY, AT THE SOUTHWEST END OF LONG KEY BRIDGE OVER LONG KEY CHANNEL, IN THE TOP OF THE WEST WING WALL, 12.0 FEET NORTHWEST OF THE CENTER LINE OF THE HIGHWAY, 18.0 FEET NORTHEAST OF THE SOUTHWEST END OF THE NORTHWEST GUARD RAIL, AND ABOUT 1 1/2 FEET BELOW THE LEVEL OF THE HIGHWAY.
1/1/1979 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1979 RECOVERED IN GOOD CONDITION.
1/1/1979 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1979 RECOVERED IN GOOD CONDITION.
1/1/1987 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1987 (TD) RECOVERED IN GOOD CONDITION.
1/1/1988 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1988 (TD) RECOVERED IN GOOD CONDITION.
10/19/1990 by FLDNR (GOOD)
RECOVERY NOTE BY FL DEPT OF NAT RES 1990 RECOVERED IN GOOD CONDITION AND AS DESCRIBED EXCEPT THE MARK IS LOCATED IN THE WINGWALL FOR THE OLD HIGHWAY BRIDGE, A NEW BRIDGE HAS BEEN BUILT JUST NORTHWEST OF THE OLD BRIDGE.
8/2/1992 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1992 (HV) RECOVERED IN GOOD CONDITION.

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.
  • This Tidal Bench Mark is designated as VM 6254 by the Center for Operational Oceanographic Products and Services.
  • 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.

Advertising with Us

Return to the Top of the Page