In 1987 Mayor Harold Washington dedicated the parcel as "DuSable Park" in honor of Jean Baptiste Point du Sable, the first known settler of Chicago. The Chicago Park District took ownership of the land at DuSable Park in 1988 via a quit claim deed. Eight years later Keer-McGee and River East L.L.C were named as companies responsible for investigating and cleaning up suspected radioactive contamination at DuSable Park. The next year, MCL Companies absorbed the holdings to Chicago Dock and Canal Trust of DuSable Park. MCL Companies then gave the land to the Chicago Park District and agreed to pay $600,000 toward its development.