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Town of Newmarket – Shining Hills (Bazil) Inflow and Infiltration Reduction Project

The Town of Newmarket and Civica Infrastructure Inc. partnered on an inflow and infiltration (I/I) reduction project in southern Newmarket, conducted on behalf of Bazil Developments Inc. This initiative aimed to identify sources of I/I entering the sanitary sewers and develop effective remediation plans to reduce these extraneous flows.

Project Description

The collaboration between Newmarket and Civica focused on mitigating I/I issues that affect the efficiency and reliability of the Town’s sanitary sewer system. The project encompassed several crucial components:

  • Flow Monitoring Program: Implemented over 10 strategically placed flow meters and three rain gauges to identify areas with high I/I within the study area.
  • Sanitary Sewer Evaluation Surveys (SSES): Conducted fog and dye testing, CCTV inspections, and maintenance hole (MH) inspections across 1,067 sanitary manholes and 65.3 km of sanitary pipes; identified nearly 100 infiltration sources (e.g., drippers, runners, and gushers) and quantified I/I flows for each defect; and executed remediation through tendering works to contractors or employing internal expertise for cost-effective fixes.
  • Defect Identification: Discovered additional defects, such as MHs susceptible to flood inflows during heavy rain events, supported by photo and video evidence.
  • Dual-Drainage Modelling: Utilized dual-drainage modelling to pinpoint surface ponding areas within the study catchment and overlayed modelling results with the sanitary network using GIS mapping to identify and seal susceptible MHs with appropriate water-tight covers.

Relevance of Experience

Civica brought extensive experience to this project, including:

Lessons Learned

  • Communication Is Key: Active and consistent communication with stakeholders, including the Town and other involved consultants, is crucial for project success.
  • Stakeholder Engagement Plan: A robust stakeholder communication plan ensures successful investigations on private properties.
  • Dual-Drainage Modelling: This modelling proved to be a useful technique for identifying low-lying MHs susceptible to inflow during large rainstorms.

Trust Civica for Expert Inflow and Infiltration Reduction Solutions

The Town of Newmarket’s I/I reduction project underscores the importance of innovative approaches in maintaining effective urban infrastructure. Civica excels in I/I reduction through advanced flood analysis. Using hydraulic modelling and geospatial data, we assess flood risks to pinpoint vulnerable sewer network areas prone to excessive inflow during heavy rain.

Through comprehensive flow monitoring, defect identification, and dual-drainage modelling, this project successfully mitigated I/I issues, enhancing the Town’s sanitary sewer system’s reliability. If you are interested in learning more about how such initiatives can benefit your community or land development project, please contact Civica today to discover tailored solutions for your needs.