News | December 29, 2020 EPA Completes Two Great Lakes Projects Totaling $9.5M To Clean Up Contaminated Sediment In Muskegon Lake And Detroit River Areas Of Concern Today, U.S. Environmental Protection Agency (EPA) announced the completion of two multi-million-dollar Great Lakes Legacy Act (GLLA) projects in Michigan through the Great Lakes Restoration Initiative (GLRI). These two projects remediated a total of 23,600 cubic yards of contaminated sediment within the Muskegon Lake and Detroit River Areas of Concern (AOCs), two of 43 areas identified in the mid-1980s by the United States and Canada as the most environmentally degraded areas in the Great Lakes ecosystem.