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Woonasquatucket CSO Interceptor

Location: Providence, RI
Owner: Narragansett Bay Commission (NBC)
Completed: March 2014

This project was located in Historic Providence, Rhode Island, and included approximately 12,000 linear feet of microtunneling pipeline ranging in diameter from 30” – 70”. The microtunneling work was divided into twenty-two drives, and included: 618 ft of 30-in. RCP in two drives; 149 lf of 36-in. HOBAS pipe in one drive; 4,423 lf of 48-in. RCP in seven drives; 743 lf of 54-in. RCP in two drives; 2,063 lf of 60-in. RCP in four drives; and 3,980 lf of 72-in. RCP in six drives. SEI’s longest drive was achieved in mid-June, representing 1,073 lf of 48-in. ID RCP with the SL60 machine.  For this project, SEI utilized three MTBM machines: the Akkerman SL74, Akkerman SL60, and Akkerman SL36 MTBM. The ground conditions consisted of saturated sands and silts.