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Bridge deck waterproofing has been a core polyurea application for nearly three decades. But 2025–2026 has seen a new wave of projects pushing polyurea into structural roles that go well beyond simple membrane waterproofing — including crack injection, structural strengthening, and ballistic-resistant barrier applications.
1. I-80 Overpass Series, Nevada — 247,000 Square Feet
A 14-bridge series on I-80 in Nevada received a comprehensive polyurea rehabilitation in 2025–2026, covering 247,000 square feet of bridge deck with an 80-mil DFT aromatic polyurea membrane topped with an aggregate broadcast wearing surface. The project team completed the full deck waterproofing sequence in rolling closures of 28-hour windows that maintained interstate traffic flow throughout. “The polyurea system let us work in overnight windows that would have been impossible with epoxy or modified bitumen,” the project superintendent noted.
2. Brooklyn Viaduct Expansion Joint Rehabilitation, New York
847 expansion joints on a complex urban viaduct received a two-part rehabilitation: structural epoxy injection for underlying concrete deterioration, followed by a high-elongation polyurea joint bridge membrane spanning 18 inches on each side of the joint. The system has been in service for 18 months without evidence of cracking or delamination — impressive performance for joints handling 3 inches of thermal movement under heavy truck traffic.
3. Mississippi River Bridge, Louisiana — Blast Resistance Enhancement
A major Mississippi River crossing received a 200-mil DFT polyurea system on critical substructure elements as part of an infrastructure hardening program. The technique — absorbing blast energy and preventing fragmentation — has been validated by extensive military research, including the work covered in our Gulf blast mitigation article.
4. I-35W Replacement 18-Year Rehabilitation, Minnesota
The replacement bridge for the 2007 I-35W collapse reached its first major rehabilitation interval in 2025. The project covered 140,000 square feet with a 60-mil polyurea deck system and will generate a rare long-term performance comparison between the original hybrid polyurethane/polyurea system and current-generation pure polyurea — data MnDOT has committed to publishing.
5. Golden Gate Approach Spans Underdeck Coating, California
The most visually dramatic project of 2025: aliphatic polyurea applied to the underdeck steel structure of the Golden Gate Bridge approach spans via suspended scaffold systems, navigating San Francisco Bay fog with a moisture-tolerant hybrid formulation. Over 180,000 square feet completed across 8 months of access windows.
For more project case studies and bridge rehabilitation resources, explore our Industry Resources library. Projects of this scope require the equipment expertise covered in our spray equipment guide.
