The Amman Valley Railway Society is situated near the former Gwaun Cae Gurwen branch line, that runs alongside the River Amman, some 10 miles (16 km) north of Swansea in west Wales. Its primary focus is to construct Swansea 9 Lines, an eco-friendly tram system to the heart of Swansea and the surrounding areas. The project was originally based on a heritage railway proposal on a lines that formerly served the various collieries of the area north of Swansea and Llanelli.