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Great Lakes AOCs

Restoring the St. Louis River AOC (timeline)

Year Critical Actions

Second BUI removed.

  • Fish tumors or other deformities

EPA Begins Cleanup Activities in Harbor Slips - Port of Duluth.


Knowlton Creek habitat restoration project construction starts.

First BUI removed.

  • Degradation of aesthetics

The framework that details projects to be implemented that work towards delisting the AOC by 2025 is published.

The St. Louis River Alliance publishes a progress report that outlines several achievements recently made in the AOC. The document also summarizes future projects to be undertaken.


A RAP update that summarizes completed remedial actions and makes recommendations for future projects is complete.


A stage II update to the RAP is complete.

The existing sediment database is updated with recent quality assessments and the prioritization and design of remediation projects follows. This speeds up the assessment of BUIs and removes them using the most efficient methods available.

The first natural reproduction of Lake Sturgeon is observed.

Remediation is completed at the St. Louis Interlake Duluth Tar Superfund Site. The site is cleaned up as three separate Operable Units.


The water quality management plan for the Lake Superior Basin, which includes strategies for the St. Louis River is completed.

A stormwater pond sediment report that addresses PAHs in Minnesota and the St. Louis River is completed .

2008 The Minnesota Pollution Control Agency publishes St. Louis River AOC Delisting Targets.

Erie Pier is converted to a reuse and recycling facility, improving Erie’s long-term capacity for managing dredged material.

A sediment quality target report is released in which the St. Louis River is used as a case study.

2005 The Hog Island Legacy Act project is completed. 55,000 tons of petroleum-contaminated sediment is removed from Newton Creek and the Hog Island Inlet. The creek banks and inlet are also landscaped to prevent erosion.
2004 The Citizens' Action Committee proposes restoration goals for many of the impaired uses through a citizen process and submits them to the Wisconsin Department of Natural Resources and the Minnesota Pollution Control Agency.
2002 Lower St. Louis River Habitat Plan is complete. The Citizens Acion Committee works with several partners from city, county, state, and federal agencies and entities on this document.

A draft of a RAP status report and RAP recommendations are released.

1999 The Citizen's Action Committee receives funding to implement the habitat plan recommendation

Restoration is completed at Grassy Point. Sawmill waste is removed and recreational access is restored to the residents.

1996 The St. Louis River Citizens Action Committee is formed.

RAP Recommendation Implementation Status document is drafted.

The St. Louis River System RAP Progress Report is completed.


Stage I of the remedial action plan (RAP) is published.