Trenchless Technology

OCT 2018

Trenchless Technology is the premier communications vehicle for the trenchless industry. Through our multiple platforms, readers receive insights into the trenchless industry, as well as keep connected to the latest news, products and projects.

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26 T R E N C H L E S S T EC H N O LO GY O C TO B E R 2018 DC Water is improving water quality in Washington, D.C., by replacing aging pipelines. The Oregon Avenue NW Sewer Rehabilitation project was constructed by Bradshaw Construction to replace and improve sewers near Rock Creek Park and Bingham Drive. Of the project 's 4,300 ft of new 24-in. sewer, 2,700 ft was installed by 60-in. microtunneling through the variable rock conditions at up to 90 ft deep. Work areas were particularly challenging as the project was located between a quiet , residential neighborhood and Rock Creek Park. Access had to be maintained for residents, emergency services and visitors to the national park. To minimize public impact , Bradshaw Construction Corp. reduced the seven designed tunnels to three including a single 1,860-ft drive and a 430- ft S -curve with a 625-ft radius. Both drives were record setting for rock microtunneling in the United States for the longest and the 'irst curved drives, respectively. The collaboration and 'lexibility of the Oregon Avenue team allowed the project to show how far we can push the push the capabilities of microtunneling . The location's site constraints drove a great deal of innovative problem solving on the Oregon Avenue NW Sewer Rehabilitation project. One half of the project was constructed within Rock Creek Park, owned by the National Park Service, thus limiting activities to within the 20-ft wide curb lines on Bingham Drive. To protect the park, further constraints minimized tree clearing for crane and vehicles access and Project of the Year N E W I N S T A L L A T I O N R U N N E R U P O r e g o n A v e n u e N W S e w e r R e h a b i l i t a t i o n P r o j e c t

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