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Beginning next Monday, May 16, the City of Moberly will be conducting an inflow and infiltration study improvement project.

Inflow and infiltration are terms used to describe the ways groundwater and storm water enter the sewer system.

  • Inflow: Storm water that enters the sewer system directly through connections such as roof downspouts, driveway drains, sump pumps, and cross connections with storm drains.
  • Infiltration: Groundwater that is influenced by surface water that enters sewer pipes and manholes through holes, breaks, joint failures, connection failures, and other openings.

The City of Moberly has contracted with Jacobs Engineering Group and TREKK Design Group, LLC to conduct an inflow and infiltration study as part of the Holman Road CSO Improvement Project.

“The purpose of this study is to identify issues with the sewer system that could cause problems that lead to sanitary sewer overflows (SSO’s) and combined sewer overflows caused by a surcharged sewer system,” stated Tom Sanders, Director of Moberly Public Works.

Throughout this study, contractors will inspect approximately 150 manholes within the study area including the implementation of smoke testing.

“Smoke testing consists of introducing a harmless, non-toxic theatrical-type smoke into the sewer,” stated TREKK personnel. “Smoke will escape from defects in the sewer system and those locations will be identified and marked.”

As this study begins, TREKK personnel will place door hangers a week prior to any smoke testing.

If you would like more information regarding this topic, please contact the City of Moberly, Public Works Department at tsanders@cityofmoberly.com.


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