In the year following the completion of the Albula Railway in 1904, the Bernina-Bahngesellschaft (BB) was established, with the objective of opening a railway line between St Moritz and Tirano, via the Bernina Pass. Two requirements drove the planning; the need for access to hydro-electric plants on the south side of the Bernina pass, and the provision of access for tourists to tourist attractions of the high mountain area. The concession for the line was obtained in 1906, and the construction was financed by the investors in Kraftwerke Brusio AG, the builders of the hydro-electic works, without the aid of cantonal subsidy.