Tunnel At Sw 762419 Sw Part Of The Redruth And Chasewater Railway

The tunnel at SW 762419 is part of the Redruth and Chasewater Railway, built around 1824. It serves as a passage for a stream through the railway embankment. The structure is made of Killas rubble, with dressed granite voussoirs forming the round-arched entrances on both the north and south sides. It features a single span with a taller keystone at the center of each arch, and vertical rubble walling above, flanked by battered and splayed embankment retaining walls.

The Redruth and Chasewater Railway operated from 1824 to 1915, originally transporting mineral ore to the port of Devoran. The railway was horse-drawn until 1854 when steam locomotives were introduced. This tunnel is a key element of the tall embankment that allowed the railway to cross the valley and also served as an efficient outlet for water from the Great Adit, an impressive 18th-century engineering achievement that drained mines over a large area.