50015 Valiant crosses Gover Viaduct with the Pathfinder Tours 1Z16 'Cornish Centurion 2' railtour on 4 May 1991. 50008 Thunderer can be seen on the rear of the train. At this point in the tour the train was actually heading away from Penzance, as it had just visited the Drinnick Mill branch. The viaduct spans the valley of the Gover Stream, between St Austell and Trewoon.