Across North America, public works budgets are strained to the maximum while essential infrastructure ages in place. Traditional sewer investigations are generally expensive, obtrusive, and often do not pinpoint the inflow/infiltration (I&I) sources. To address this issue, a new tool and technology have emerged in this past decade that is helping managers reduce the cost of sewer line rehabilitation by applying a simple rule: If it ain’t broke, don’t fix it. Micromonitoring is an innovative tool and technology that helps agencies and engineers to perform focused field investigations and, in the end, reduce sewer investigation and rehabilitation program costs. Micromonitoring provides a giant step forward in the evolution of a sewer utility I&I reduction program by focusing sewer rehabilitations/repairs only on sewers that are contributing to wet weather peak flows. Micromonitors are used in small diameter sewers where low flows are common and traditional flow monitoring is ineffective.

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