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Staff outlines manhole sealing and I&I mapping plan for sewer system
Summary
Staff described mapping and grading of roughly 220 manholes, a training program, and a phased plan to seal and prioritize the poorest-condition manholes — starting with a test window to estimate throughput and staff-hours for future budgets.
Staff presented a new inflow-and-infiltration (I&I) approach focused on manhole sealing and prioritized work for the worst-condition areas.
They said crews have mapped and graded the system and flagged manholes for improvement; "That's Jonathan's kinda baby as he goes and..." the presenter said, noting the mapping and grading are underway. Staff indicated an expectation of roughly five meter swaps per month as a throughput benchmark and described options for shifting staff hours to purchase materials for a spring work window.
Councilors discussed funding timing and training tradeoffs; staff confirmed materials were budgeted but that available crew hours would determine how many manholes can be completed each season. A spring report to public works and council was proposed to set a realistic annual target (for example, 10–20 manholes per year depending on crew availability).
