Due to increasingly stringent state and federal guidelines, the Hammond Sanitary District initiated a project to reduce combined sewer discharges to the Little Calumet River by diverting combined sewer overflows (CSO) from CSO pump stations to a new interceptor sewer that will eventually deliver these CSOs to the District’s wastewater treatment facility for processing. The project consists of more than 10,000 feet of pipe ranging from 16 inch and 18 inch HDPE for an inverted siphon crossing of the Little Calumet River to 66-inch reinforced concrete pipe.
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