O-Train East Extension Achieves Substantial Completion, Spring Opening Remains on Schedule
OC Transpo announced on Thursday that the O-Train East Extension has reached a critical milestone with the issuance of a certificate of substantial completion. This development keeps the project on track for its anticipated launch in spring 2026, specifically during the second quarter of the year.
Transfer of Responsibility Marks Key Phase
With substantial completion confirmed, operational responsibility for the East Extension has now formally shifted from the constructor, EWC, to Rideau Transit Maintenance (RTM). This transition is a significant contractual step, indicating that all new system infrastructure is functional and can be safely operated and maintained.
The extension will connect Blair Station to Trim Station, enhancing transit options for Ottawa residents. RTM will now oversee the final stages required before passenger service begins.
Final Preparations and Timeline Details
According to a memo from OC Transpo interim general manager Troy Charter dated March 5, the next steps involve a series of technical and operational activities. These include:
- Updates to the train control system software
- Adjustments to platform edge cameras
- Landscaping and final paving on Highway 174
- A 21-day trial running phase
- Final system preparations and independent safety audits
The announcement came one day after OC Transpo's initial forecast, with a report for the March 12 transit committee session having predicted substantial completion would be reached on March 4. The trial running phase will follow a familiarization period for RTM staff and a technical briefing.
Overcoming Previous Challenges
The project has faced delays, primarily due to a spalling issue discovered in January 2026 with cartridge bearing assemblies in Line 1 train axles. This problem forced OC Transpo to remove 41 train cars from service for repairs.
However, Charter emphasized that this issue did not impact the timeline for achieving substantial completion on the East Extension. Work continues in parallel to restore full capacity and fleet availability on Line 1, with staff implementing new containment and monitoring measures to allow the full fleet to return to operation.
The transit authority remains confident that the East Extension will launch as planned in Q2 2026, bringing improved connectivity to Ottawa's eastern communities.
