Sigma’s bridge design experience assures that all projects, regardless of size or complexity, will conform to agency requirements and feature low cost, innovative transportation solutions that can save our public and private sector clients millions of dollars, reduce overall construction time, and improve long term performance of the finished product.
Sigma is the lead structural design firm for the Interstate 15 (I-15) South Design-Build project in Clark County, Nevada. Sigma oversees the delivery of the design of 26 new bridges and more than 40 new retaining wall systems in sixteen months.
Specialty Areas
- Cast-In-Place/Post-Tensioned (CIP/PT) Concrete Box Girder Bridges
- Steel Plate Girder Bridges
- Railroad Bridges
- Cable-Stayed Bridges
- Signature Bridges
- Construction/Fabrication/Erection Engineering
- Design-Build/Construction Management at Risk (CMAR)/Public-Private Partnership (P3) Experience