February 2023 Vol. 78 No. 2

Tech Tips

Tech Tips: Solving Infiltration Problems After Structural Rehabilitation

By: NASSCO Member and ICGC Chair John Manijak, Hoerr Construction, Inc.

(UI) — The process of sewer system Inflow & Infiltration (I&I) removal requires a holistic approach to truly be effective. Specifically, all four points of infiltration must be addressed to achieve ultimate success. These four points are manholes, mainline joints, service connections and service laterals.

Nearly all municipalities are constrained by budgetary limits for the annual amount of work that can be performed and are forced to make the decision to repair only certain items while leaving the remainder neglected. Some concentrate only on mainline structural solutions as a widespread approach while others will tackle only segments with known impending failure. It sometimes becomes a balancing act of “How much can be done right or right now?” versus “What are my spending limits?”.

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