Bridge Construction

Delivered 11 months early with a record-setting 3,200-ft main span using pioneering concrete technology

Challenge & Innovation

Building in 250-ft deep waters with 8-knot currents demanded unprecedented solutions. We pioneered self-floating caisson technology giant concrete shells ballasted with seawater that eliminated noisy pile driving near orca pods. For seismic resilience, we engineered friction pendulum bearings that allow 6 feet of lateral movement during quakes, while the world's first carbon-capturing concrete (embedded with mineralized CO₂) reduced the carbon footprint by 42,000 tons.

Results & Legacy

Now carrying 65,000 vehicles daily, the bridge slashes cross-sound travel from 85 to 12 minutes while setting global benchmarks. Its carbon-capturing concrete continues mineralizing 900 tons of CO₂ annually equivalent to 2,000 acres of forest. The project's true legacy lies below the waves: our patented "marine growth foundations" transformed submerged pylons into artificial reefs, increasing native salmon populations by 35% and earning Marine Stewardship Council certification.