Jurrasic Bark: Underwater Logging in Lake Superior

By Scott Patterson
Published on October 1, 1998
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PHOTO: SUPERIOR LUMBER
One hundred years after it sank, Superior Water-Logged Lumber's underwater logging operation recovers another tree.

In the closing decades of the nineteenth century, an army of loggers labored beneath the seemingly endless canopy of the white pine forests that stretched from Wisconsin to Canada, harvesting the virgin hardwoods that grew beneath the cool protective shade of the pines.

The old-growth trees of those far-reaching Northeast lands are forever gone–or are they? Several years ago, Scott Mitchen, cofounder along with Robert “Buz” Holland of the Superior Water-Logged Lumber Co., Inc. in Ashland, Wisconsin, discovered that hundreds of thousands — if not millions — of sunken logs lie preserved on the bed of Lake Superior, remnants of logging operations that stretch back over 300 years. Transported in chain-boomed rafts to sawmills, 20% to 30% of the timber became water-logged and fell to the lake bed, where it is destined to remain. That is, until treasure hunter and shipwreck salvager Scott Mitchen and his team of divers get hold of it. “This,” says Mitchen, “is the biggest treasure we’ve ever found.”

Mitchen’s underwater logging operation (he has described the lost logs as the “Jurassic Park of wood,”) is also harvesting red oak, flaming red birch, maple, cherry, elm, walnut, and more — all of which have slumbered for centuries in the cold silences of the Great Lake.

Lake Superior, the world’s largest body of fresh water, proved to be the best possible resting place for the lost timber, some of which sank below its thick glassy surface before the United States of America existed. The low temperatures and oxygen content of the lake preserved the logs, some nearly 700 years old, embalming them like mummies from a lost civilization.

Because these mummified logs once grew under a canopy of conifers in low light and limited-nutrient conditions, they matured slower than the fast-growing varieties modern tree farms now use. The result is a superfine grain, with 25 to 70 growth rings an inch (the highest count yet is 77 rings an inch). This compares to an average of six to 15 growth rings an inch in today’s harvested trees. “The growth rings are so tight, they’re like pages in a book,” says Mitchen.

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