Text Box: A Helical Pier Foundation System was used to support a pedestrian bridge in St. Peter's Bay, Prince Edward Island. The pedestrian bridge was part of a scenic walking trail and was located in a marshy area with 15'-0" of soft organic soil overlying dense sand. The site was only accessible during the winter months when it was frozen over due to the soft soils and since it was an environmentally sensitive area. Each bridge abutment was supported on two sets of three helical piers, which were arranged in a tripod fashion to carry both the vertical loads and any lateral forces caused by the wind loads. The Helical Piers were installed through thick ice and penetrated the soft layers of soil until they were firmly embedded into competent load bearing soil. The helical piers were encased in a 4-1/2" diameter galvanized steel pipe and grouted to provide additional lateral support in the soft soils. The Helical Piers proved to be ideally suited to provide a deep foundation solution in an inaccessible and environmentally sensitive area containing poor soils.
 
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