to overcome turbine vibration at the higher (60 cycle) speeds in Canada. These were the only AEI turbines installed at Ontario Hydro. Units 5 & 6 operated until the station closed (40 years) The station would reach 2400 MW by 1968, surpassed only by the Nanticoke Generating Station (4096 MW) near Port Dover, in the late 1970s. During the late 1960s and 1970s, the station operated to full capacity as an eight-unit baseload plant, meeting about 17% of Ontario's electricity needs. In the early 1980s, Lakeview worked at full capacity after problems at Pickering in August 1983 resulted in a brief power shortage. In the early 1990s the station was partially overhauled. A surplus of capacity led to the mothballing of four units. The station continued to play an important role as a four-unit peaking plant, providing an adequate and reliable electricity supply when consumer demands were highest in the morning and around the dinner hour – and in the summer and winter. This role was especially critical on hot days when air conditioning use drove up electricity demand. Following provincial government policy to phase out Ontario Power Generation's six coal-fired generating stations by the end of 2007, Lakeview Generating Station ceased operations on Saturday, April 30, 2005, after 43 years. Boilers Units 1 & 2 had Babcock & Wilcox front-fired boilers and Parson turbines with a tandem cross compound arrangement (there were two 150 MW turbines - high/intermediate pressure and intermediate/low pressure) Each unit had two generators - one 3600 RPM, the other 1800 RPM. Units 3 & 4 (1964–65) had boilers built by Combustion Engineering, with double tangentially fired furnaces. The tandem compound turbines were supplied by AEI (UK) Units 5 & 6 (1965–66) had Babcock & Wilcox front-fired boilers and AEI tandem compound turbines. Units 7 & 8 (1968) had Babcock & Wilcox front-fired boilers and Parsons tandem compound turbines. At a cost of $274 million, Lakeview Generating Station had become the largest thermal-electric plant in the world when it was completed in 1968. Environmental improvements Environmental improvements at Lakeview in recent years included recycling fly ash and safeguarding water quality. The station's achievement of International Organization for Standardization ISO 14001 certification continued to demonstrate Lakeview's commitment to environmental management through responsible operation at the highest standards. Emissions control 1972: Research to remove SO2 from flue gases continues. 1981: Coal-cleaning project completes first of four years of