Sewer System Survey

The Town of Narragansett’s Engineering Department will be performing an Infiltration/Inflow Survey in Congdon Street area of the Town. The study area is limited to the southeast portion of the Pier neighborhood. The purpose of the survey is to locate sources of infiltration/inflow in the sewer system. Infiltration/Inflow (I/I) is water that enters the sewers from cracked or defective pipes, as well as from private yard drains, roof leaders, and sump pumps. I/I can overload the sewer system causing backups, flooded basements, or overflows to the streets. It also increases sewer rates because the I/I is transported to the wastewater treatment facility where it is unnecessarily treated.

To identify sources of I/I, the Town’s engineering consultant BETA Group, Inc. will be conducting the survey which will include televised inspection of the sewer system pipes, manhole inspections, building / property inspections, smoke testing and dyed water testing in your area over the next six months.

For the building / property inspection task, a project team will visit your building or home to inspect the exterior and interior (typically just the basement) of the building. The interior inspection will only take about 15 minutes. It will be conducted between the hours of 8:00 AM and 6:00 PM, Monday through Saturday. Prior to building inspections, additional notification will be provided.

Dye testing involves putting dyed water into downspouts, roof leaders, yard drains and possibly catch basins. The dye is non-toxic and water soluble and poses no risk to individuals or pets.

Smoke testing involves blowing a white, harmless, odorless, non-staining and residue-free smoke into the sanitary sewer in the street and then observing where the smoke leaks out. Additional notification will be provided prior to smoke testing in your area.

Members of the inspection teams have been approved by the Town and will always carry and prominently display project identification badges.

For additional information, see this FAQ.