Tag Archives: infiltration

America’s Infrastructure Report Card

The CBS television news show, “60 Minutes,” reported a story about the condition of the United States’ infrastructure, which is considered by the American Society of Civil Engineers infrastructure report card to be a D+. To view the report, click … Continue reading

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Inflow and Infiltration

Many systems have yet to conquer their issues of inflow and infiltration. The excess rainwater, other groundwater sources and runoff following rain events are a regular nuisance to both collection system operators and treatment plant operators. Both systems can become … Continue reading

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How Are Communities Affected by Inflow and Infiltration?

Many small towns throughout Kentucky have aging wastewater collection systems that are failing or in desperate need of repair. Most still use brick sewers built more than 100 years ago, while many more rely on dated combined systems to collect … Continue reading

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Rehabilitation Alternatives

Before the 1980s, sanitary sewer rehabilitation programs were primarily limited to a process of digging up the old one and replacing it. If an existing pipeline was deteriorating or had leaking joints, the pipe was either replaced or a parallel … Continue reading

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After Assessment, What Now?

Now that you have all this data collected from flow monitoring,  interviews and records review, manhole inspections, smoke and dye testing and cleaning and televising the line, just what do we do with it? First, you should determine why you … Continue reading

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Cleaning and Televising the Lines

Cleaning and televising lines are used to help identify any problems that may have occurred within the sewer. Before lines are televised, they must be cleaned by either pigging the lines or jetting. Pigging the lines is when you drag … Continue reading

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Smoke Testing and Dyeing

Smoke and dyed water testing can be used to identify inflow locations and cross connections where inflow has been implicated as a problem in the results of the flow monitoring. Smoke testing is an effective way to detect storm connections … Continue reading

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Collection System Assessment Tools

When it comes time to assess the results you have obtained, utilizing maintenance employees from the public works department and major industries and a thorough records review can help to determine known trouble spots. Some information of use could be: … Continue reading

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You Can’t Manage What You Can’t Measure

Wastewater collection systems are vulnerable to inflow and infiltration (I/I) during wet weather. To determine how much I/I is coming into the system you must monitor the flow in the collection system. Flow monitoring is the least costly investigative technique … Continue reading

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What is Inflow and Infiltration?

Inflow and infiltration are terms used to describe the ways that groundwater and stormwater enter into sanitary sewer systems. Inflow and infiltration (I/I) is groundwater or stormwater that flows into the sanitary sewer system due to leaky sewer lines and … Continue reading

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