itself became a regular occurrence. Laurel Sefton MacDowell writes in her book An Environmental History of Canada that, "As early as the 1860s, a fishery inspector at Hamilton Harbour discovered that fish found along the shore tasted of coal oil and that dead ducks and muskrats were coated with oil from two refineries." By the 1950s, city officials had deemed Hamilton Harbour unfit for any recreation use and shut down all beaches. In 1919, a Federal Order-In-Council changed the name of Burlington Bay to Hamilton Harbour. By the 1970s, the International Joint Commission, which governs water usage in the Great Lakes Basin, and other agencies began to recognize the need for action. Greater water quality awareness, improved pollution controls, and an economic downturn all served to improve conditions in the 1980s. In the 1990s, beautification and ecological control were well underway. These measures included sealing the Lax Lands, contaminated with heavy metals and other pollutants, under a cap of clay; landscaping Bayfront Park and Pier 4 Park; and keeping common carp from entering Cootes Paradise. The visible and measurable improvement in water quality in Burlington Bay was showcased in 1994 by the very public swim of Sheila Copps, a local MP and federal cabinet minister. Access and recreational use of the bayfront has improved, and swimming is now allowed at two beaches in the harbour: Bayfront and Pier 4. Hamilton Harbour is listed as a Great Lakes Areas of Concern in The Great Lakes Water Quality Agreement between the United States and Canada. Part of the remediation plan is to reclaim the harbour's wetlands. While most of the carp in the harbour had been eradicated by early 2021, Maclean's reported that numerous goldfish had been found, presumed to have come from the dumping of pet fish by the public. One expert stated that the goldfish "is the ultimate survivor of difficult conditions ... it can feed on blue-green algae blooms that native species cannot—blooms that appear with increasing frequency in Hamilton Harbour". Randle Reef Randle Reef, a site in the southeast corner of the harbour, is considered the most dire of identified water pollution issues awaiting remediation in Canada. The environmental containment facility, about 7.5 hectares in size, covers in-situ about 130,000 m3 of sediments contaminated with polycyclic aromatic hydrocarbons, and contain about 500,000 m3 of dredged PAH contaminated sediments. The containment facility was constructed in 2018 using two walls