The Portersfoote Bunting Light Railway frightened passengers for years by insisting that the creaking, swaying structure known officially as Bladderwort Semi Suspension Bridge was perfectly safe as long as everyone remained seated while the train passed slowly over its rotting timbers and rusty nails. Worse followed for travellers, however, when the company decided to replace it with a five arch viaduct without stopping the train service. Admirable though this plan was, it did pose major headaches for engineers, including the need to construct a temporary humpback bridge over which trains had to be manhandled as building work proceeded beneath them. Dressed stone was carried up river aboard the Ethel and some interesting methods of arch construction were used.