Tunnel Business Magazine

AUG 2018

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Page 7 of 43

TUNNELINGONLINE.COM TBM: TUNNEL BUSINESS MAGAZINE // AUGUST 2018 8 On June 28, the District of Columbia Water and Sewer Author- ity (DC Water) named and blessed the tunnel boring machine that will mine the final segment to complete the Anacostia River Tunnel System. This will make a much healthier Anacostia River by reducing combined sewer overflows (CSOs) by 98 percent and significantly reducing flooding in northeast DC. tional Park Superintendent Tar on, District of Co- lumbia Ward 3 Councilmemb ter Board Chair Tommy Wells, DC Water CEO and Gener - vid L. Gadis and US EPA Regional Administrator Cecil Rodrigues joined in the ceremony and a blessing by the Reverend Bobby Liv ch. The fiv unnel is the largest and fi- nal segment of the massive tunnel system that will bring relief from CSOs that discharge to the Anacostia River. This work is part of the larger Clean Rivers Project, a $2.7 billion program to improve the water quality of the Anacostia and Potomac rivers and Rock Creek. The tunnel portions of the program increase the capacity of the combined sewer system by capturing combined sewage during rain storms and storing and conveying sewage to the Blue Plains Advanced Wastewater Treatment Plant for treat- ment. The tunnel will also significantly reduce flooding events in neighborhoods located in northeast D. et, Rhode Island Ave, LeDroit Park and Bloomingdale. Lik e traditionally named for women. DC Water broke tradition by naming this tunnel boring machine for Chris- topher Allen, the Assistant Director for the Clean Rivers Project who passed away last year. Allen had 47 years of experience in construction management, general contracting, consulting field supervision and program management of large buildings, mass transit, heavy construction projects and aviation programs. He managed projects at major international airports, the Pentagon and other large capital improvement projects. Then he brought this wealth of knowledge, and valuable lessons learned, to the Clean Rivers Project. DC Water Board Chair Tommy Wells said, "Today we celebrate the start of the final piece in a long-awaited solution to improve the health of the Anacostia River. This project will have a signifi- cant positive impact on the environment, helping to restore na- tive aquatic wildlife, while bringing recreation back to the Dis- trict's waterways." Added DC Water CEO and Gener vid Gadis, "Our ratepayers have made a huge investment in the future of the Anacostia and life along the waterway. We celebrate to- day with the local communities who will benefit from health- ier waterways and for those who have experienced flooding in northeast D.C. that the complete tunnel system will significantly reduce. We also celebrate the life of Christopher Allen, a man whose influence will long live on in the projects to which he has contributed his talents, and to the people to whom he has given great inspiration." tional Park Service Superintendent Tara on said, "The Anacostia River has a rich and diverse history told from many perspectives throughou e today remind us that we are a part of that and we have a critical role in shaping the future of this river for the enjoyment of all." The celebration also included remarks by US EPA Regional Ad- ministrator Cecil Rodrigues, and Chris Allen's s - ous members of Allen's family participated in the event. ch 2018, DC Water placed in service the southern por- tion of the tunnel and it was immediately put to the test with heavy rainstorms. In the first two and half months of operation, the tunnel captured and treated over 1.4 Billion gallons of sewage and over 100 tons of trash that would have normally gone into the Anacostia Rivers during these rains events. The construction of this entire Anacostia River tunnel began in 2013. When complete in 2023, it will be 13.1 miles long and have a 23-ft inside diameter. The complete tunnel system will capture 98 percent of sewage overflows to the Anacostia River. It will also provide more flooding relief for residents in the neighborhoods et Avenue and Rhode Island Avenue, including Bloomingdale and LeDroit Park neighborhoods, who for decades were served by undersized sewers. As in many older cities, about one-third of the District has a combined sewer system. A combined sewer overflow (or CSO) oc- curs during heavy rain when the mixture of sewage and storm- water cannot fit in the sewer pipes and overflows to the nearest water body. CSOs contain bacteria and trash that can be harmful to the environment, but the system was designed as a preferable alternative to the combined sewage backing up in homes and businesses and on the streets. Since the early 1900s, only sewer systems with separate pipes for sewage and stormwater have been installed in the District. CSO tunnels similar to DC Water's already exist in Chicago, Indianapolis, Atlanta and other cities. DC Water Christens Northeast Boundary Tunnel TBM B U S I N E S S B R I E F S

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