This multi-disciplinary Study depended on
several groups who provide essential support. Their broad involvement and impact are critical to the Study's success.
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Experts Recommend New Regulation Plan for Lake Superior Outflows Improved Plan More Robust, Provides Additional Benefits to Environment
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Throughout its history, the International Joint Commission has found that consultation with the public is extremely valuable as it provides unfettered communication and insight.
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The IUGLS website was selected to be the Great Lakes Information Network (GLIN) Site of the Month for July 2013!
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About this Website


About this Website

This website captures the final products and pertinent information of the International Upper Great Lakes Study, a bi-national team effort spanning more than five years. More than 200 scientists, engineers, planners and technical experts drawn from a wide range of disciplines and from governments, academia and the private sector, contributed to the Study’s planning, applied research and analysis.  Their efforts and professionalism helped produce a comprehensive Study based on sound science and peer-reviewed analysis.  Key highlights include: 

Decision Tree Tool


Decision Tree Tool

Use this tool to explore the many science and technical projects that were critical to the IUGLS, and see how they relate to and support the IUGLS key findings and recommendations.

Press Release


Press Release

Experts Recommend New Regulation Plan for Lake Superior Outflows

Improved Plan More Robust, Provides Additional Benefits to Environment

The International Upper Great Study (IUGLS) today announced they have recommended an improved regulation plan for outflows from Lake Superior.  The new plan – Lake Superior Regulation Plan 2012 – is more robust than the existing plan and provides important benefits, especially to the environment.  Made up of a panel of experts from Canada and the U.S., the recommendation is the highlight of their final, peer-reviewed report to the International Joint Commission (IJC), marking the end of the $14.6 million ($17.6 million Cdn.) five-year study....