Tunnel Business Magazine

OCT 2018

TBM: Tunnel Business Magazine is the market leader for North America. TBM is written for leading professionals in all aspects of tunneling and covers project stories, design elements, contracting strategies, legal issues, new technology and more.

Issue link: http://digital.tunnelingonline.com/i/1042145

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Page 13 of 47

Rubber City Ren ewal Robbins Crossover TBM Helps Clean Up Akron Waterways O n Aug. 29, 2018, a 30.4-ft diameter Robbins Crossover (XRE) TBM crossed the finish line at the Akron Ohio Canal Interceptor Tunnel (OCIT). A press day followed on Sept. 5, where companies and members of the media were invited to view the giant machine. The machine—dubbed "Rosie" in honor of Rosie the Riveter, an icon representing American women who worked in factories and shipyards during World War II—overcame tough ground conditions during the bore. 1 4 Waterway Initiative The City of Akron's water initiative—Akron Waterways Renewed—is on a mission to promote the benefits of the OCIT and related structures, and dispense knowledge about the EPA-mandated solution to clean up the city's waterways. The OCIT is the key component of the city's Long-Term Control Plan aimed at reducing Combined Sewer Overflows (CSOs) into the Little Cuyahoga River and surrounding streams. The tunnel is part of a system that includes drop shafts, diversion structures, consolidation sewers, and related appurtenances that will decrease the flow of untreated CSO and direct wastewater and storm water through Akron's Water Reclamation Facility. "About 30% of Akron's current system is combined sewers. This includes drainage from showers, sewers, and other sources combined with storm water, so sometimes, the flow exceeds the designed capacity. By achieving the Consent Decree requirements, we expect zero untreated overflows in a typical rainfall year," said Heather Bolestridge, Communica or Akron Waterways Renewed. The 6,200-ft long OCIT will thus be able to handle 450 million gallons of CSO annually in a 27-ft finished inside diameter tunnel. If rainfall is above typical, a On August 29, 2018, a 30.4 ft diameter Robbins Crossover TBM broke through at the Akron Ohio Canal Interceptor Tunnel (OCIT). The Robbins Crossover XRE QEGLMRIŪXLIƤVWXWYGLQEGLMRI to operate in the U.S.—achieved advance rates of up to 111 ft per day in two 10-hour shifts. TUNNELINGONLINE.COM TBM: TUNNEL BUSINESS MAGAZINE // OCTOBER 2018 C O V E R S T O R Y

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