Depending on the size and nature of the crossing, we offer a variety of solutions in Ultra•Cor, Super•Cor, Bolt-A-Plate or Dur•A•Span Structural Plate. Corrosion/abrasion-resistant Dur•A•Span Structural Aluminum Plate is particularly well-suited to saltwater or aggressive environments. Open-bottom designs and our Prefabricated Steel Bridges are effective, environmentally-friendly solutions to preserve habitat.