"Marked Tree Siphons" Traditional Cache

This cache has been archived.

Chuck Walla: Greetings from Geocaching.com!

Since you have not responded to my reviewer log about your cache, the cache has been archived.

Some time ago, I posted a note to your cache page requesting a response from you to post what you were planning to do with the cache on the page and to send me a note. I have no record of a response, and no response tells me that you are not planning on replacing or repairing this cache. If I am wrong with that assumption, please let me know promptly. I can always unarchive the cache for you if needed.

Sincerely,

Chuck Walla
Geocaching.com Volunteer Cache Reviewer
Reply to: [email]chuck.walla@hotmail.com[/email]
Please send the name of the cache and the GC code with your reply.

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Hidden : 2/8/2006
Difficulty:
2.5 out of 5
Terrain:
2.5 out of 5

Size: Size: regular (regular)

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Geocache Description:

Between Payneway and Marked Tree, wouldnt advise taking a car or a 2 wheel drive during bad weather.

Three gigantic siphons, each nine feet across and two hundred feet long, were built in 1939 for $215,000 to take water out of the St. Francis Lake, also known as the St. Francis Sunken Lands, hoist it over the levee and dump it into the St. Francis River (on the right side of the picture below) in order to keep the river navigable.

Normally, that kind of thing is done with culverts, locks or sluiceways; but the ground here is so soft and sandy that those usual solutions create weak points in the levee. The siphons allow the levee to maintain its structural integrity while simultaneously allowing engineers to shift water from one side to the other. Danny Max of the Memphis District of the Corps of Engineers stated he knew of no other such siphons on the whole planet.

The most elegant thing about these siphons is the clever way that the flow is regulated. There are no water pumps and no moving internal valves or constrictions. Once the siphons are primed by vacuum pump, the flow can be constricted by opening an air valve introducing a bubble into the top of the arch. Once primed, the siphons can run indefinitely powered only by gravity and the flow can be adjusted with a twist of the wrist.

Rubermaid Container

WCC Travel Bug
Log/Pencil
Bungee Cord
Pressure Gauge
Mardi Gras Coin
Toy Truck
Silly Puddy
Deck of Cards
Carbiner

Additional Hints (Decrypt)

Bire naq haqre gur oevqtr.

Decryption Key

A|B|C|D|E|F|G|H|I|J|K|L|M
-------------------------
N|O|P|Q|R|S|T|U|V|W|X|Y|Z

(letter above equals below, and vice versa)


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