Non-OSIM Culvert and Retaining Wall Inspections – Caledon

Project Type: Structural Assessments

Market: Municipal

Client: Town of Caledon

Date: Spring 2025 - Winder 2025

About this Project

Services Performed: Non-OSIM culvert and retaining wall inspections, CRI value calculations, repair and rehabilitation recommendations, preparation of inventory replacement cost estimates, development of a comprehensive data package, development of critical structure action reports, updating GIS shapefiles, and preparing presentation to Town staff

1,500+ non-OSIM inspections utilizing MTO guidelines
Calculation of Culvert Rating Index (CRI)
Integration of inspection data into Town’s asset management system
Identification of critically deficient structures

In 2025, Pearson Engineering was engaged by the Town of Caledon to carry out inspections of their non-OSIM culvert and retaining wall structures on their roadway and trail systems to support long-term asset management and infrastructure planning. The scope of work included the visual inspection and data collection for 1,500+ structures. Inspections were carried out following the procedures and guidelines outlined in the MTO Culvert Inspection Guide for culverts less than 3000mm, which included the implementation of the Culvert Rating Index (CRI). An excel database was developed to document the condition of each structure, identifying maintenance or rehabilitation needs, recommending construction schedules, calculating CRI values, and providing replacement cost estimates. The Town’s GIS database was updated to include the geodetic locations of each structure.