Wastewater Collection Services in Salem, Ore., has come a long way since its grouting van was a converted horse trailer towed by a pickup truck transporting the camera equipment.The city’s sewers, mostly 4- to 75-inch concrete pipe with some brick and vitrified clay tile, date to 1910. With 65 percent of 785 miles of pipe compromised by grease, roots, defective service lateral connections or structural damage, the 36-member department meets the challenges with an aggressive inspection and maintenance program.Grouting has been an integral part of the city’s inflow and infiltration (I&I) control program since 1971. “Bringing the work in-house instead
