Tramvia or Ferrocarril Econòmic from Manresa to Berga (originalmente en castellà, Tram or Economic Railway from Manresa to Berga) was the societat, created in 1881, which will build and exploit the Línia Manresa-Berga-Guardiola via estreta, també coneguda popularment com a carrilet Manresa-Berga or the carrilet, which will circulate between Manresa and the Rosal colony to Olvan first (1885), and ends at Guardiola de Berguedà més tard (1904), which will continue to circulate between 1972 and 1973. Els promotors i principals accionistes d'aquesta societar foren els industrials de l'alt Llobregat, principally the masters of the colònies tèxtils del Bages i Berguedà.
The railway will solve and reduce the problems of transport of prime materials (cotó) and produce manufacturat (teixit) of colònies tèxtils. Starting in 1904, in connection with the mining area and the Berguedà mountain range, the mitjà de transport per al carbó de les mines de Fígols, the cement of the Asland factory in Castellar de n'Hug i la Fusta generat in this area, at the time that reduces the cost of the Berguedà coal that fàbriques tèxtils consumien quan the cabal del riu not abastava to produce the energy necessary for the machinery. [1] In the seu plantejament com a tramvia també will be the main mitjà of transports of passatgers in a time in which mancaven alternatives, and in an area that faces avui is infradotada of mitjans of public transport.