10.7 km deep tunnel to divert combined sewage overflows away from the Don River and Taylor-Massey Creek during storms.
One of the largest sewer infrastructure projects in Canada. Will significantly reduce combined sewer overflows into Lake Ontario.
Original Approved(2020)
$710.0M
Current Approved(2024)
$810.0M
Budget Variance?The change between a project's originally approved budget and its current approved budget. Positive numbers mean the budget grew (over original); negative means it shrank. Only projects with multi-year history can show a variance.· 3 cycles
$100.0M(+14.1% over original)
Original (2020)
$710.0M
Current (2024)
$810.0M
Jan 1, 2020
Original budget approved
$710.0M
Jan 1, 2022
Budget revised
+$70.0M (+9.9%)
Jan 1, 2024
Budget revised
+$30.0M (+3.8%)
Apr 2, 2026
Project tracked
Added to CivicLedger
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Project record last updated: 4/2/2026