Inflow and Infiltration Investigations
Groundwater (infiltration) seeps into sewer pipes through holes, cracks, joint failures, and faulty connections.
2022 Inflow & Infiltration Investigations are Ongoing - Updated on April 8, 2022
Year 11 of the Town's ongoing 12 year inflow and infiltration investigations project started on April 5, 2022 and work is ongoing. There are three main components to this program:
- Manhole inspections
- Daytime cleaning and television of sewer pipelines and inspection on sewer manhole are typically conducted between 7:00 AM and 5:00 PM. During these routine inspections, the sewer pipelines are cleaned hydraulically with a pressurized water truck and a sewer-jetting nozzle and television inspected with a closed-circuit television inspection (CCTV) camera. The vacuum pressure created by the cleaning may cause air to escape though the traps and drains of your plumbing fixtures such as toilets and sinks.
- Nighttime flow measurements are taken by accessing, isolating, and monitoring sewer manholes to determine the amount of ground water entering the sewer system. These should not be any interruption in sewer service while these measurements are collected. This work is typically conducted between 11:00 PM and 6:00 AM
On Tuesday, April 5, 2022, the Town's consultants, Weston & Sampson Engineers, will began the daytime manhole inspections in subareas 3A and 3E. This work will be ongoing for the next few weeks.
On Sunday, April 10, 2022, the Town's sewer system consultants, Weston & Sampson, and contractor, National Water Main Cleaning Company, will be starting the nighttime flow isolation work in subareas 3A and 3E. This work will be ongoing for the next few weeks.
The daytime cleaning and television inspections will be scheduled later this month.