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The following culvert materials are available:

  • Corrugated Steel
  • Steel Structural Plate
  • Corrugated Aluminum
  • Aluminum Structural Plate
  • Reinforced Concrete
  • PVC
  • Smooth HDPE
  • Corrugated PE

Only certain culvert materials are available for each culvert type. HY-8 assigns a default Manning's 'n' value for the selected material, but this value can be changed if desired. For more information on the plastic pipes (PVC, HDPE, and PE) please see Plastic Pipe Materials.