Köping–Uttersberg–Riddarhyttan Railway, Railroad heritage site in Köping Municipality, Sweden

The Koeping-Uttersberg-Riddarhyttan Railway is a narrow-gauge line with an unusual 1093-millimeter track gauge connecting industrial towns across central Sweden. The roughly 46-kilometer route passes through a region shaped by mining and manufacturing heritage, with a former engine house in Riddarhyttan now serving as a cafe and information point about rail operations.

The first section between Köping and Uttersberg opened for general traffic on 1 June 1866, after provisional freight service began in 1864; it cost 955,000 kronor, with a state loan of 500,000 kronor. The Uttersberg–Riddarhyttan line opened on 1 August 1880, built by Riddarhytte AB at a cost of 274,600 kronor. Köping–Uttersbergs Järnvägsaktiebolag bought it on 1 January 1911, forming the Köping–Uttersberg–Riddarhyttan Railway. The Swedish state purchased the line on 25 January 1952 for 638,000 kronor; passenger service ended on 1 September 1952, and freight continued until 1968.

The line's name links Köping, Uttersberg and Riddarhyttan, the industrial towns it served. Its 1,093 mm gauge is said to have existed elsewhere only on the small Lisjö industrial railway in Surahammar Municipality. The three locomotives delivered to that width by Munktells Mekaniska Verkstad in 1864 and 1865 were kept, and the track was adjusted to them.

You can visit the former engine house in Riddarhyttan, which now operates as a cafe and information center about the railway's history. The location is easy to access and offers a good place to learn about the equipment and how the line operated.

The 1,093 mm gauge arose from an ordering mistake: Munktell's works built three locomotives to 1,093 mm instead of the planned 1,067 mm, and moving one rail outward on the half-built line proved cheaper than re-gauging the engines and some 40 wagons. The same gauge is said to have existed elsewhere only on the small Lisjö industrial line in Surahammar.