Inflow and Infiltration
Case Studies for the Identification and Quantification of Sanitary Maintenance Hole Inflow and Infiltration (I&I)
Sanitary sewer capacity can be quickly overwhelmed during large rainfall or snowmelt events. Maintenance holes (MH) —even ones not in low-lying areas—can become submerged and produce an inflow of water to sanitary systems. Inflow and infiltration inspections are designed to assess sanitary sewer capacity analysis, giving you a more comprehensive picture of your wastewater asset…
Read MoreMethodology for the Identification and Quantification of Sanitary Maintenance Hole Inflow and Infiltration (I&I)
During heavy rains and snowmelt, streets are designed specifically to channel water into ponding areas. In some circumstances, however, the amount of rainfall can be such that maintenance holes become submerged, exceeding the sanitary sewer capacity and causing floods. An inflow and infiltration inspection can help quantify storm water inflows through submerged maintenance holes, allowing…
Read MoreChallenges of the New Subdivision Flow Monitoring to Assess Performance of Inflow and Infiltration (I/I) Prevention
The innovative New Subdivision I/I Prevention Program has yielded great results for multiple municipalities when it comes to infiltration and inflow (I/I) reduction. That said, it doesn’t mean that the new subdivision I/I prevention plan is without its challenges. Let’s take a look at some of those challenges laid out in the flow monitoring plan.…
Read MoreAn Overview of the New Subdivision Flow Monitoring to Assess Performance of Inflow and Infiltration (I/I) Prevention
All wastewater collection systems are designed to convey water to a designated point. They are meant to allow for a small amount of extraneous inflow and infiltration (I/I). But more often than not, there is higher I/I than anticipated and can present capacity issues to the sanitary sewers. That’s what makes new subdivision flow monitoring…
Read MorePrivate-Side Inflow and Infiltration Reduction Success Utilizing a Public-Private Partnership (P3) Framework
By Edward Graham, M.A.Sc. Eng., P.Eng; Seth Monczka, B.Eng; Matthew Malone, M.Sc.; and Cassandra Lim, Civica Infrastructure Inc. Introduction The impacts of reduced sewer conveyance and treatment capacity in wastewater systems caused by inflow and infiltration (I&I), bring about problems including increased risk of basement flooding, restricted new urban development, increased wastewater operation and maintenance…
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