Papineau-Leblanc Bridge: from documented deterioration to emergency interventions

Summary

Factual summary

The Autorité des marchés publics reviewed the MTMD’s contract management related in particular to the Papineau-Leblanc Bridge. It concludes that the analyses and inspections intended to determine maintenance work were incomplete, particularly with respect to the stay cables. It also notes that recommended work was carried out only in part and that the bridge continued to deteriorate.

In 2022, traffic restrictions were imposed to ensure the structure’s integrity. The MTMD then awarded several sole-source contracts on emergency grounds to stabilize the bridge. The AMP estimates these contracts at $31,578,907, including a 15% risk allowance.

Document updates

This section is not separately documented in the retained file.

Report → Validation → Follow-up → Action

This section is not separately documented in the retained file.

Documented timeline

• 1969 — Beginning of the period during which the AMP found no specific assessment of the stay cables.
• 1982 — Notice from the designer on the importance of preventing corrosion.
• 2010 — Study recommending maintenance work, carried out only in part according to the AMP.
• June 9, 2022 — Closure of the left lane in both directions and a reported reduction in the speed limit.
• October 24, 2022 — Ban on access by heavy vehicles announced as a preventive measure.
• 2022 — Awarding of several sole-source contracts on emergency grounds to stabilize the bridge.
• November 1, 2023 — Publication of the AMP’s final report on the MTMD’s contract management.

Facts supported by sources

Relevant AMP findings

• The absence of an assessment of the stay cables since 1969 is described by the AMP as concerning.
• Before a mandate was awarded to a firm, no monitoring or non-destructive testing of the load-bearing cables had been performed.
• In 1982, the bridge designer advised the MTMD of the importance of preventing corrosion from taking hold on certain parts of the structure.
• Several inspections reported wear-related failures.
• A 2010 study had recommended maintenance work; it was carried out only in part.
• The AMP links the sole-source contracts awarded on an emergency basis to shortcomings in the analysis, inspection and completion of the necessary maintenance work.

Contracts and amounts

Contracting method: Several sole-source contracts on emergency grounds, as confirmed by the AMP.
Estimated amount: $31,578,907, including a 15% risk allowance.
Contract numbers, contractors and breakdown by contract: Not determined in the section of the report reviewed.

File review

Event brief — candidate for an in-depth analysis

Documented period: 1969–2022; AMP report published November 1, 2023
Location: Papineau-Leblanc Bridge, between Montréal and Laval
Asset: Cable-stayed bridge / specialized structure
Nature: Structural deterioration and stabilization
Intervention: Emergency work

When a condition is already known, the value of field follow-up no longer lies solely in the initial report. It lies in continuity: validating the information, documenting the interventions carried out, tracking the asset’s evolution and keeping the file visible until it is resolved.

Report → Validation → Follow-up → Stabilization / Intervention.

Identifying a problem is not necessarily the same as following it through to resolution. In this file, the AMP report makes it possible to precisely document a known progression, analyses and inspections deemed incomplete, recommended work only partially completed, and the subsequent use of emergency interventions. This wording reflects the AMP’s findings without overstating them.

Potential for in-depth analysis

The file lends itself to an in-depth analysis structured around four areas: the specific nature of the stay cables and the inspections required; the gap between recommendations and work carried out; the evolution of restrictions and stabilization measures; and the detailed chronology of contracts and decisions. A longer version should supplement the breakdown of contracts, their contractors and their individual amounts using official data.

Undetermined elements

This section is not separately documented in the retained file.

Next milestone

This section is not separately documented in the retained file.

Sources

• Autorité des marchés publics — Review of the MTMD’s contract management, section 2.1 “Papineau-Leblanc Bridge”.
• AMP — news release presenting the findings and 16 recommendations, November 1, 2023.