This article describes the history of coal railways between Ostrava and Karviná (north-east of Czech republic). The main part of this lines were built by the Northern Railway of the Emperor Ferdinand. After World War II this railways were nationalised and were in property of Ostrava-Karviná Coal-mines Company (OKD). This railway network was enlarged by new-built lines and by part of former Košice-Bohumín and Kunčice - Český Těšín railways. Now this railways are in property of company OKD, Doprava (OKD, Transport), which is the second
largest railway company in Czech republic (after state company Czech railways).