The City of Oak Ridge Public Works Department will be utilizing state-of-the-art technology to perform inspections of the City’s sewer system. This technology employs a sonar machine that emits a repeating series of tones, similar to a musical scale and in open areas can be heard over long distances. The tones emitted by the machine, while harmless, are low enough in frequency that residents nearby may be able to feel, and in some instances hear them. 

Testing will begin Monday, March 23rd and will continue for eight to nine weeks, depending on weather constraints and other factors. Residents will notice signage posted on main roads stating, “Acoustic Sewer Inspection in Area” while crews are working in their neighborhoods.

Questions can be directed to the Public Works information line at 865-425-3619 or email  More specific information may also be found on our website at

Media contact Candice Brogan at or (865) 425-3456.