WestWater Engineering conducted the infiltration/inflow study for 15,000-feet of the sewer collection system for the Town of Collbran using flow recorders and on-site inspections to determine the location and extent of I/I. Because of the high infiltration/inflow recorded, and the extremely poor condition of the existing sewer lines, it was decided to replace the majority of the collection system. The study proceeded into Final Design and Resident Engineering.