Andrew Duffy

Jul 12, 2020  •  Last Updated 1 day ago  •  12 minute read

For the past three years, some nine storeys beneath downtown Ottawa, work crews have been tunnelling a solution to one of this city’s oldest problems: sewage.

The combined sewage storage tunnel, the CSST, is designed to hold for treatment sewage-contaminated storm water that would otherwise be discharged into the Ottawa River.

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