• A mid-afternoon veiw down the expanse of Isle Royale National Park.  Photo taken from the Mount Ojibway Fire Tower.

    Isle Royale

    National Park Michigan

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  • Unmanned aircraft including hobbyists

    All waters and lands within the boundary of Isle Royale National Park have been closed to the use of unmanned aircraft including radio-controlled airplanes, hexacopters, and similar items. More »

Handling Ballast Water to Control Non-Indigenous Species

Emergency Response Guide for Handling Ballast Water to Control Non-Indigenous Species

This field guide was developed as an aid to incident responders responsible for handling ships with high risk ballast water which may be laden with non-indigenous species and harmful pathogens. Isle Royale partnered with the American Steamship Company, U.S. Geological Survey biologists, The Glosten Associates, and the National Parks of Lake Superior Foundation among others to conduct this work. To view this guide, click here. To view the field trails report, which outline several methods for the treatment of ballast tanks, click here.

Ballast Treatment on the M/V Ranger III

In response to the rapid spread through the Great Lakes of the fish pathogen viral hemorrhagic septicemia virus (VHSv), the Park installed a manually operated treatment system onboard the Ranger III.

Thanks to funding through the Great Lakes Restoration Initiative, the Park was able to upgrade from the initial experimental treatment system to an automated, commercially available system. To help with system selection, a naval architecture firm, The Glosten Associates, produced a report for Isle Royale on the available treatment systems for ships similar to the Ranger III. This report will be of interest and use to other ship owners and has been made publicly available. To view the Ballast Water Treatment System Evaluation for Small Vessels, click here.

The new system is manufactured by Hyde Marine and relies on filtration and UV. The system is more effective than the previous treatment method and does not use chemicals. Installation occurred at our Houghton, MI headquarters in between trips to the island.

Did You Know?

Areal view of the islans's Northeast end.

Ryan Island on Isle Royale’s Siskiwit Lake is the largest island on the largest lake on the largest island on the largest freshwater lake in the world.