Controversy over a multi-billion-dollar gas main replacement program in Chicago will not delay Wisconsin Energy Corp.'s planned acquisition of the gas mains' owner Integrys Energy Group , Wisconsin Energy chairman and CEO Gale Klappa said Tuesday. Integrys owns Peoples Gas, which is embarking on a natural gas pipe replacement program that has seen its projected costs more than double to $4.6 billion from $2.2 billion in 2009, Crain's Chicago Business reported.