PILOT INFLOW AND INFILTRATION REDUCTION PROJECT – AURORA 2C LANDS
The Inflow and Infiltration (I/I) Reduction Pilot Project in the Town of Aurora was to identify and remediate sources of I/I entering the local and regional sanitary sewer systems in exchange for receiving new development capacity allocation. The Civica team investigated over 250 hectares including over 3,000 lots using a systematic approach of flow and rainfall monitoring, area prioritization, smoke testing, dye testing, manhole flood testing and condition assessments and CCTV inspections. Through the SSES investigations, one hundred and ninety-six (196) I/I sources with direct connection to the sanitary sewer system were identified in twenty (20) catchment areas: 60 Residential Downspouts, 34 Sanitary Manhole Covers,32 Roof Leaders, 20 Mainline Point Repairs, 13 Roof Leaders connected to a Sump Pump, 14 Sanitary Manhole Frame and Cover Repairs, 10 Catch Basins, 9 Sump Pumps, 2 Cleanouts, 2 Mainline Full Segment Repairs. Of the one hundred and ninety-six (196) I/I sources identified, one hundred and seventy (170) sources were remediated. The remaining twenty-six (26) sources were not remediated for varying reasons including an inability to receive property owner(s) approval to carry out remediation works, the I/I source having no cost-effective remediation option, etc.