Author
Listed:
- Ingrid Peignier
- Nathalie De Marcellis-Warin
Abstract
To discover the executive summary This study presents a complete redesign of the tool used to estimate the socio-economic costs associated with damage to underground infrastructure in Canada, originally developed by CIRANO in 2015. The 2026 version expands the geographical coverage to all Canadian provinces, enhances the estimation framework by incorporating four new cost categories (additional road accidents avoided, evacuation, water service interruptions, and property damage resulting from water main breaks), updates the existing methodologies, and refines all calculations at the census subdivision level (approximately 4,000 local areas). The tool processes data from the DIRT database, a voluntary reporting system in which infrastructure owners record damages caused by third parties. It estimates eight categories of indirect costs depending on the type of infrastructure affected, the geographical location, and the magnitude of the incident. Applied to Quebec data from 2023 to 2025, the tool estimates annual indirect costs ranging from 36 to 47 million Canadian dollars. These estimates remain conservative due to certain inherent limitations of the damage database. Nonetheless, they provide robust orders of magnitude to inform prevention strategies and support data-driven decision-making. Pour découvrir le sommaire exécutif Ce rapport présente la refonte complète de l’outil d’estimation des coûts socio- économiques des dommages aux infrastructures souterraines au Canada, développé initialement par le CIRANO en 2015. La version 2026 élargit la couverture géographique à l’ensemble des provinces canadiennes, enrichit le cadre d’estimation avec quatre nouvelles catégories de coûts (accidents routiers supplémentaires évités, évacuation, interruption du service d’eau, dommages matériels liés aux bris de conduites d’aqueduc), actualise les méthodologies existantes et surtout affine l’ensemble des calculs à l’échelle de la subdivision de recensement (environ 4 000 zones locales). L’outil traite les données de la base ORDI, une base de données des dommages aux infrastructures causés par des tiers remplie par les propriétaires d’infrastructures sur une base volontaire. L’outil estime huit catégories de coûts indirects en fonction du type d’infrastructure endommagée, de la localisation géographique et de la magnitude du bris. Appliqué aux données québécoises de 2023 à 2025, l’outil estime des coûts indirects annuels variant entre 36 et 47 millions de dollars. Ces estimations demeurent toutefois conservatrices en raison de certaines limites inhérentes à la base de données sur les dommages. Elles fournissent néanmoins des ordres de grandeur solides pour éclairer les stratégies de prévention et soutenir une prise de décision fondée sur les données.
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