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February 12, 2019

Water infiltration, concrete ‘honeycombing’ part of rectified defects at Rideau Station in Ottawa

As reported in the Ottawa Citizen, inspectors looking for construction snafus in Ottawa’s largest infrastructure project found water infiltration, drainage glitches and concrete defects at the Rideau LRT station last year, city records reveal.

The city recently released 25 more “non-conformance” reports to researcher Ken Rubin under access-to-information law. They are the same kind of inspection records whose details were reported by this newspaper last month and in August 2018. A ruling last year by the province’s information and privacy commissioner compelled the city and RTG, the project’s builder, to release the reports.

The latest batch is intriguing since the inspection records are largely from 2018, just months before the second missed deadline for the builder to hand the keys to the project over to the city, in November 2018. The first missed handover was in May 2018.

RTG has told the city it will now hand over the LRT system to the city by the end of March. City council’s finance and economic development committee is scheduled to receive an important update on the work Tuesday.

Non-conformance inspections are standard in the construction industry. They make sure infrastructure is built to standards and specifications. If there’s a problem, the issue is documented, the builder proposes a solution and it’s cleared by engineers.

On the LRT project, builder Rideau Transit Group and the city have quality-control inspectors.

RTG is responsible for paying to fix construction deficiencies on the $2.1-billion Confederation Line project. The consortium also has a 30-year maintenance contract with the city.

“Recurring deficiencies” were recorded in a report by an RTG inspector last August related to the concrete on the Rideau Station’s north and south platforms.

There was “honeycombing” — a term used to describe coarse surfaces and cavities in concrete — and voids around embedded conduits. Grounding cable was protruding from the surface of the concrete topping and wire mesh was exposed. There was heaving of the concrete and pipe insulation exposed in the surface of the concrete, the report says.

Keep reading in the Ottawa Citizen

 


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