In 1972 the lines were closed for cargo, except for the route Amsterdam – Uithoorn, which remained in service between 1976 and 1981 to transport building materials for the new Schiphollijn (which originally had no connection to the rest of the national railway network) and Uithoorn – Nieuwersluis, which remained in service until 1986, for demolition company Koek in Mijdrecht, where the Dutch Railways demolished a lot of equipment.