Infiltration through failed joints in a 27-inch concrete gravity sewer in Windsor, Ontario, taxed the capacity of the wastewater treatment plant during heavy rains. Hydrogen sulfide was corroding the crown in many places.In 2002, the city put out a tender to directional drill the 3,800-foot sewer. No contractors responded. City engineer Fahd Mikhael looked at other solutions, including open-cutting, but no one would touch the job. Fearful of the sewer’s imminent failure, the city requested bidding to pipe burst and upsize the line in 2012.Two firms responded, and local SLR Contracting Group won the bid. Although the company had extensive
