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Has anyone been in the fourth chamber of Jacobs well?

After about a dozen divers drowned trying to explore the bottom of Jacob's Well, the fourth chamber was finally sealed up for good.



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About Jacob's Well The settlers didn't dive into it, of course, but treated it instead as a drinking fountain and later used it to power a saw mill. They named it Jacob's Well because of its biblical magnificence. Since the well was discovered, at least 4,500 feet of it has been explored.

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The few who have seen the fourth chamber say it is virgin cave with fantastic limestone formations and no gravel. Covering the bottom is fine silt that can totally obscure vision when kicked up by one misstep. Ironically, there was a time when it was impossible to descend into Jacob's Well.

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Swimming at Jacob's Well is currently not permitted. Please note that the park is still open for hiking and viewing the spring during our regular hours. Plus we have geocaching, bird watching and a Nature Center to explore and enjoy! We also have picnic areas, a labyrinth, a sundial, and a Loose Parts Play Area!

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The well takes an initial plunge through 23 feet of well-lit water to an apparent bottom, but then it veers off into a descent of increasing darkness. I visited with Gregg Tatum who has logged over 250 dives there. He says it is no place for a novice.

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Temperature of the water in Jacob's Well remains a near-constant 68°F and visibility is typically excellent. The spring provides habitat to numerous species of fish (principally sunfish and perch); turtles; aquatic insects; crustaceans; and, most notably, the cave-adapted Fern Bank salamander (Eurycea pterophilia).

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Jacob's Well may not be defined as a cenote, being that it's an artesian fountain fed by an aquifer, but it has many of the same properties as well-known cenotes.

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Hranice Abyss (Czech: Hranická propast) is the deepest flooded pit cave in the world.

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As of June 29, 2022, swimming will not be allowed at Jacob's Well Natural Area (JWNA) for the foreseeable future. The threat of high bacteria levels, other pollutants and poor visibility conditions are unsafe for swimming.

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