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Details for Benchmark: AA0268

N 24° 39.267 W 081° 16.900 (NAD 83)

Altitude: 24.11

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

Location:
In MONROE county, FL View Original Datasheet
Designation:
872 4138 TIDAL 4
Marker Type:
tidal station disk
Setting:
massive structures
Stability:
Probably hold position/elevation well.

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Found while geocaching.

Found while geocaching.

Found during our walk through Baiha Honda State Park .. thanks my jujubedo

[Photos:]
photoAA0268_my_jujubedo_

Enjoyed the view!

This entry was edited by Flieger_EDHK on Monday, 19 October 2015 at 21:42:45 UTC.

[Photos:]
photoAA0268

Found this in good shape while geocaching under Bahia Honda Bridge

[Photos:]
photoUnder Bahia Honda Bridge

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

Found it :-)

[Photos:]
photoIMG_5396

Discovered this benchmark while geocaching.

[Photos:]
photostill in good condition

Bahia Honda State Park

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

Geocaching for GC55THT which is down as missing but found this nearby benchmark. The benchmark is in great condition.

Made find while checking out the bridge.

[Photos:]
photoAA0268

We spent the afternoon in the Bahia Honda State Park grabbing some caches and looked down and there the mark was.

Had a blast in Key West

[Photos:]
photoFlorida 055

Found this one on our vacation in Florida
N 24 39.284
W 081 16.903

de Huismannetjes

[Photos:]
photobenchmark

I was with my mom and dad (AstroD-Team) hunting marks in the Keys.

Found as described and recovered in good condition.

While the rest of the team played at the beach, I was hunting a few marks.

[Photos:]
photoclose up AA0268 - Monroe County, FL

Found it at 24 39.277N, 081 16.905 W

found it while camping at bhsp

Found this while vacationing at the cabins at Bahia Honda State park, just prior to being evacuated because of tropical storm Fay. I odn't know if the other finders posted the correct picture. This is supposed to be labelled number 4, and should be 17 feet away from BH No. 2 1935, which I believe mine was.

[Photos:]
photoTop of wall
photoIMG_0312

Found this benchmark by serendipity. It is in excellent condition. My friends and I had reserved a snorkel trip out to Looe Key, but the boat had a prop problem and had to turn around, so we came here to snorkel. We did get to see a manatee in the channel... my first!

About 200 yards oceanside is a nice gorgonian flat in about 4-5' of water with some reef fish, sponges, and lots of urchins.

[Photos:]
photoclose up
photoperspective shot
this is the south retaining wall of the old bridge, along the edge of the channel

What a nice day at the beach. Disk looks good

Found as described.

[Photos:]
photoAA0268 - A.jpg

We love camping at Bahia Honda and come to this spot all the time. Never paid any attention to benchmarks until we started caching.

Documented History (by the NGS)

1/1/1936 by CGS (MONUMENTED)
1/1/1966 by NGS (GOOD)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1966 13.4 MI SW FROM MARATHON. ABOUT 13.4 MILES SOUTHWEST ALONG U.S. HIGHWAY 1 FROM THE POST OFFICE AT MARATHON, ON BAHIA HONDA KEY, NEAR THE EAST BANK OF BIG SPANISH CHANNEL, AT THE EAST END OF THE BRIDGE OVER CHANNEL, SET ON THE TOP OF THE SOUTH CONCRETE WING WALL, 105 YARDS WEST OF THE EAST END OF THE BRIDGE, 16 FEET SOUTH OF THE CENTER LINE OF THE HIGHWAY (MEASURED UNDER THE BRIDGE), 17.2 FEET NORTHWEST OF W BAHIA RM 2 AND ABOUT 30 FEET BELOW THE LEVEL OF THE HIGHWAY.
1/1/1970 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1970 RECOVERED IN GOOD CONDITION.
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 NOTE THAT THE MARK IS IN THE OLD HIGHWAY BRIDGE, NOW A HISTORIC MONUMENT AT BAHIA HONDA STATE RECREATION AREA.

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 6368 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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