Kitchi-Gami Almanac

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Turbulent Ballast Waters

Ballast water treatment technology can now be tested in Superior, Wisconsin, in a $850,000 facility and under the Great Ships Initiative to stop ship introduction of invasive species into the Great Lakes. The initiative is meant to speed development of commercially and environmentally viable treatments.

Other ballast water issues:

• Michigan and California have put into place controversial laws related to ballast. Starting this year, Michigan required permits for ocean-going vessels that stop at its ports. Almost 60 permits have been granted. Last fall, California approved a law requiring chemical ballast treatment of all ships coming into its ports by 2009.

• The U.S. House Transportation Committee is reviewing a bill to curb introduction of invasive species.

• National Wildlife Federation announced intent to file a civil lawsuit against nine ship owners to force treatment of ballast. Under the Clean Water Act, there is a mandatory filing wait after announcing intent to sue.


Lake Notes

Jewelweed by Gary FewlessLake BulletLate summer you can see the orange blossoms of the touch-me-not flowers, also called jewelweed. If you break the stem, the gel inside - much like aloe - can temporarily soothe poison ivy or other skin irritations.
Lake BulletAs you swelter in the August heat, remember that snow has fallen at least once in every month except August in Duluth, Minnesota. On September 18, 1991, Duluth got 2.4 inches of snow.


Lake Levels

Current Water Levels
The levels on the hydrographs are shown in both feet and meters above (+) or below (-) Chart Datum. Chart Datum, also known as Low Water Datum, for Lake Superior is 601.1 feet (183.2 meters). It is a reference plane to which water depth and Federal navigation improvement depths on navigation charts are referred.
Water Level Key


Address e-mail to reader@lakesuperior.com
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