 These were conventional steam locomotives that were converted to fireless operation in 2011.The 9-mile Gotthard Tunnel construction (1872–82), introduced .Switzerland had used older fireless engines in industry, such as breweries before 2010, when the steam company Dampflokomotiv- und Maschinenfabrik refurbished two locomotives of the German "Meiningen" type and modernised them for use on sidings.