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Construction and Abatement of the Largest CSO on the Connecticut River

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It was determined that Combined Sewer Overflows (CSO's) released from the City of Holyoke, Massachusetts CSO#9 contributed to over one-half (0.5) billion gallons of untreated sewage entering the Connecticut River on an annual basis. The Environmental Protection Agency issued an Administrative Consent Order to the City of Holyoke which required the City to design, construct and operate improvements to control CSO discharges by September, 2004. On December 17, 2003 the City of Holyoke issued a Request for Proposals (RFP) for Operation, Maintenance, Repair and Improvements to the City's Wastewater System.

United Water teamed with Metcalf & Eddy Engineers and RHWhite Contractors to design, build, operate the new CSO Abatement Facility, as well the City's wastewater treatment facility improvements to treat a minimum of 235 million gallons annually of combined sewer overflows. No more than four untreated overflows could occur at CSO#9 outfall on an annual basis. Construction and project acceptance was to take no more than three years.

Document Type: Research Article


Publication date: January 1, 2008

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  • Proceedings of the Water Environment Federation is an archive of papers published in the proceedings of the annual Water Environment Federation® Technical Exhibition and Conference (WEFTEC® ) and specialty conferences held since the year 2000. These proceedings are not peer reviewed.

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