Enbridge Mainline Block Valve Replacement Program

In Saskatchewan, Manitoba, and Ontario, Lauren partnered with Enbridge to execute the Mainline Block Valve Replacement Program, revitalizing critical crude oil transmission infrastructure to address reliability risks and ensure uninterrupted energy flow across key corridors. Delivering detailed engineering design, procurement packages, and construction support from 2023 onward, our team replaced three valves at two sites in the 2024 summer season within tight outage windows, enabling rapid pipeline restarts while preparing phased implementations for 2025 and 2026, all tailored to site-specific needs including leak detection and control system integrations for heightened safety and environmental protection.

Revitalizing mainline block valves for operational resilience

This brownfield program targets six mainline block valves (MLBVs) on Enbridge Lines 2, 4, 5, and 9 at strategic sites: Hilton Station (ON, two valves), Short Street Valve Site (ON), Odessa Station (SK), Gretna Terminal (MB), Sarnia Terminal (ON), Road 88 Valve Site, and Marble Rock Road Valve Site. Lauren’s multidisciplinary expertise addressed valve failures like seat bypass, stem seal leakage, and actuator issues through comprehensive replacements, including NPS 18-48 gate valves with electric actuators, pressurized split tee fittings for hot taps, and supporting pipe, flanges, fittings, and auxiliary valves. Our scope extended to construction scope of work (SOW) development, vendor proposal evaluations, optimization, and RFI support, ensuring high-quality, accurate technical drawings that facilitated efficient executions and minimized downtime.

Overcoming outage constraints for seamless brownfield integrations

The Mainline Block Valve Replacement demanded meticulous coordination to execute in live pipeline environments with minimal disruptions, which Lauren mastered through agile multidisciplinary engineering and proactive stakeholder alignment across diverse provincial regulations. Navigating short-duration outages required precise procurement packages and construction optimizations to integrate electrical and control upgrades, valve testing, and leak detection systems in environmentally sensitive areas without delays. By developing engineering work packages and providing on-site support, our team resolved site-unique challenges—from actuator integrations to commissioning—delivering phased progress that upholds Enbridge’s infrastructure integrity while adhering to rigorous safety protocols and enabling future scalability.

What we delivered

Ongoing since 2023 across Saskatchewan, Manitoba, and Ontario, this program demonstrates Lauren’s precision in brownfield pipeline enhancements for sustained reliability.

Infrastructure: Replacements of six MLBVs (NPS 18-48) with electric actuators, hot-tap split tee fittings, piping/flanges/fittings, and integrated leak detection for Lines 2, 4, 5, and 9.

End-to-End Management: Detailed design through commissioning, including procurement packages, SOW development, vendor evaluations, RFI support, and phased construction across seven sites.

Safety and Efficiency Focus: High-quality technical deliverables enabling 2024 replacements within short outages, with ongoing document control and as-builts for 2025-2026 executions.

• Detailed engineering design
• Multidisciplinary engineering
• Construction support
• Procurement package development