August 3rd – Keweenaw Peninsula Stamp Sands Dredging Public Meeting
Posted on: July 14, 2017

Stamp sands

6 P.M., Thursday, August 3rd

Lake Linden High School

Hubbell, Michigan

(just north of Houghton)

A public meeting about Lake Superior dredging of “stamp sands” (mine tailings) from historical copper mining on Michigan’s Keweenaw Peninsula will be held at the above date and time. Stamp sands have migrated onto important Lake Superior spawning habitat such as Buffalo Reef. Representatives of the Michigan Department of Environmental Quality, Michigan Department of Natural Resources and the U.S. Army Corps of Engineers will be participating.

Stamp sands are the result of extensive copper mining on Michigan’s Keweenaw Peninsula. Historically, ore was crushed through a forceful stamping process, liberating minerals in a process where rock was reduced to fine grained sand.

Over more than a century, some 23 million metric tonnes of these tailings were sluiced onto Lake Superior’s shores near Gay, Michigan, on the eastern shore of the Keweenaw Peninsula. Stamp sands are migrating across river mouths, along beaches and over important fish spawning habitat like Buffalo Reef.

Dredging is being proposed as a temporary measure to deal with stamp sands migration.

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