Although 29 years seems like a long time from initial complaint to delisting I suppose it's reasonable considering everything that needs to happen.

2012 - 2013: Stage 3 RAP completed and AOC delisted.
2002: Presque Isle Bay becomes the first U.S. AOC to achieve the Recovery Stage designation.
2002: Presque Isle Bay Remedial Action Plan Update completed.
1995: Presque Isle Bay Remedial Action Plan Update completed.
1992: Presque Isle Bay Remedial Action Plan completed.
1991: Presque Isle Bay is listed as an AOC. The Presque Isle Bay Public Advisory Committee was established.
1989: The City of Erie entered into a Consent Decree with PADEP to upgrade its wastewater treatment, collection, and conveyance system including the elimination of Combined Sewer Overflows in the City’s system.
1984: Fishermen report strange growths on Presque Isle Bay brown bullheads to the U.S. Fish and Wildlife Service.