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What We Do - Transportation What We Do - Transportation
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HEI has designed bridges throughout North Dakota and Minnesota for more than four decades. We combine cost-effectiveness with architectural flair, creating structures that serve as local landmarks for residents and communities. 

We provide comprehensive structural solutions from start to finish using new developments. We adapt to unique and challenging site conditions while maintaining current design standards to build structures that meet any need. 

Our design services include:
  • Bridges
  • Box culverts
  • Low-water crossings
  • Flood walls
  • Retaining walls
  • Lift stations
  • Gatewells
  • Inlet and outlet structrures
  • Water reservoirs

As a multidisciplined firm, we will also assist with all necessary: 
  • Hydraulic analyses
  • Environmental permitting
  • Surveying 
  • Construction staking and administration