 Until the mid-20th century the marshy area within the sand spits become further filled in and developed industrially under the watch of the Toronto Harbour Commission.With deindustrialization spreading rapidly by the 1980s, and oil companies writing off polluted lands to avoid future liability, much of the previous land uses became abandoned.Through the 1980s and 1990s the area's main occupants were a power station, city incinerator, dockyard facilities.