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Details for Benchmark: AA0271

N 24° 39.300 W 081° 16.817 (NAD 83)

Altitude: 11.02

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

Location:
In MONROE county, FL View Original Datasheet
Designation:
G 329
Marker Type:
bench mark disk
Setting:
light structures
Stability:
Mark of questionable or unknown stability.

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Found it in the restricted area.

[Photos:]
photoThe mark
photoStairs
photoClose with stairs
photoRestricted area

Found while geocaching.

Stamped G329 1979.

[Photos:]
photoAA0271

Found this one during our walg through the Baiha Honda State Park .. thanks my jujubedo

[Photos:]
photoAA0271_my_jujubedo nearby
photoAA0271_my_jujubedo_nearby
N 24° 39.300 W 081° 16.873

One of the junior stars pointed this one out while we were finishing up the earthcache.
This one is in greay shape.

[Photos:]
photoJust the BM
photoThe BM and our GPSr
photoJust the GPSr

Recovered together with gott18 on our four week vacation which, amongst others, brought us to Florida.

Thanks for showing :-)

[Photos:]
photoIMG_5395

Seen while on vacation, caching and doing the Florida geotour.

Found while geocaching, walked past it the first time.

[Photos:]
photoGeoFlorida 2014 (17)

Found this one while doing some volunteer work in the park.

Found this benchmark while geocaching - GC2RHBY Bahia Honda Earthcache. Benchmark is in great condition.

[b]N 24° 39.301', W 081° 16.872'[/b]
Happened to see it 2nd time I walked these steps today. Funny that coords posted here are over 90m off, but this is G 329.

[Photos:]
photoG 329

Made find while checking out the bridge.

[Photos:]
photoAA0271

In good shape

[Photos:]
photoThe mark

With my mom and dad (AstroD) hunting for benchmarks in the Keys. We are here for the Winter Star Party!

[Photos:]
photoG329 - Florida Keys

Found as described and recovered in fair condition. THe stamping is getting a bit hard to read.

While the rest of the team was playing at the beach, I went in search of a few marks.

[Photos:]
photoclose up AA0271 - Monroe County, FL
photomedium shot AA0271 - Monroe County, FL

Bench mark is still there!!! still sunny outside, still warm, all is well! tamron

Found this while vacationing at the cabins at Bahia Honda State park, just prior to being evacuated because of tropical storm Fay.

[Photos:]
photoIMG_0304
photoStairs

Found as described.

[Photos:]
photoAA0271 - A.jpg

Found this benchmark while searching for a nearby cache in this beautiful park. Benchmark is in great shape and is GPS suitable.

SR and I were looking for a cache right around the corner from this benchmark. as we finished and walked over the steps under the old Bahia Honda bridge, we stumbled upon it. great find, great area to visit. sun, sand and surf!

[Photos:]
photobenchmark
the benchmark disk
photoa view
the view
photoa view
the view
photoa view
a view

Documented History (by the NGS)

1/1/1970 by NGS (MONUMENTED)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1970 13.4 MI SW FROM MARATHON. ABOUT 13.4 MILES SOUTHWEST ALONG U.S. HIGHWAY 1 FROM THE POST OFFICE AT MARATHON, AT BAHIA HONDA KEY, ABOUT 250 FEET SOUTHWEST OF THE EAST END OF THE BAHIA HONDA HIGHWAY BRIDGE (THE HIGHWAY BRIDGE IS ELEVATED OVER AN ABANDONED RAILROAD BRIDGE), 142.1 FEET EAST OF THE EAST FACE OF THE CONCRETE WING WALL OF THE ABANDONED RAILROAD BRIDGE AND AT THE NORTHEAST CORNER OF THE HIGHWAY BRIDGE, ABOUT 150 FEET NORTH OF THE NORTH EDGE OF THE HIGHWAY BRIDGE, 58 FEET SOUTH OF THE WATER LINE FOR THE BAY, ABOUT 10 FEET ABOVE THE LEVEL OF THE WATER LINE, AND SET IN THE TOP OF THE 6TH CONCRETE STEP FROM THE BOTTOM OF LANDING AND IN THE NORTHWEST CORNER. A NEW HIGHWAY BRIDGE IS PRESENTLY UNDER CONSTRUCTION 0.2 MILE TO THE NORTH AND IS SCHEDULED FOR OPENING IN 1973.
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. THE DESCRIPTION IS ADEQUATE EXCEPT DELETE BAHIA HONDA HIGHWAY BRIDGE AND ADD OLD BAHIA HONDA BRIDGE, NOW A HISTORIC MONUMENT AT BAHIA HONDA STATE RECREATION AREA.
1/1/1984 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1984 RECOVERED IN GOOD CONDITION.
1/1/1988 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1988 (HGB) 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. WARNING-Repeat measurements at this control monument indicate possible vertical movement.
  • This Tidal Bench Mark is designated as VM 6367 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.

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