 They constructed a new route through the Valley, which left the old one below Ponts Mill, ascended the west side of the Valley, crossed the River Par twice on the Ponts Mill and Rock Mill Viaducts, passed under the Treffry Viaduct, approached Luxulyan through a tunnel and rejoined the old route at Luxulyan railway station.The new consortium was called the Cornwall Minerals Railway.It is free to visit the viaduct and open all year round.