By using a little Yankee ingenuity, the City of Saco, on Maine’s southern coast, has made significant pro-gress toward eliminating combined sewer overflows (CSOs).A $10.8 million, 20-year plan, finalized in 1994-95, incorporated a series of milestone projects including sewer separation, flow slipping, and primary treatment of combined sewage at Saco’s 4.2 mgd (design) wastewater treatment plant. The city began implementing the plan in 1996 and to date has completed 98 percent of the projects.“We’re very pleased with the progress we’ve made toward meeting the objectives of our CSO Abatement Master Plan,” says Howard Carter, deputy director of public works. Previously,
