03/10/2025
Reconnecting East Harlem to the heart of New York City🍎
Phase 2 of NYC’s legendary Second Avenue Subway is officially on track - and we’re leading the design.
Here’s what’s in store:
✨ $1.972B investment in the city
✨ Extending the Q Line from 96th ➡️ 125th Street
✨ 1.5 miles of twin tunnels
✨ 3 brand-new ADA-accessible stations
✨ Fresh station shells + new community & retail spaces above ground
The impact? Less congestion. Faster, smoother commutes for 100,000+ daily riders. A city that feels even more connected.
As our Thomas Dahlgren, EVP of COWI in North America puts it:
“This is a technically complex job in one of the world’s most challenging underground environments. Our role is to bring the depth of COWI’s global tunnelling and underground design expertise to ensure constructability, safety, and efficiency are embedded in every stage of delivery.”
COWI has been appointed lead designer by Connect Plus Partners, and our role in the project includes managing the design, engineering, scheduling, and coordination to ensure safety, constructability, and efficiency throughout every phase.
🛠 Construction begins: 2026
🌀 Tunnel boring starts: 2027
🎉 Project completion: 2030
With 50 years of U.S. experience and 450+ tunnel design professionals worldwide, COWI is ready to shape the future of NYC transit - for today and generations to come. 🗽💛