power. In summary, Lord Westwood, the leader of the house, spoke in favour of the Board and Lord Kinnaird's motion was rejected, allowing the Board to continue. Lord Westwood also stated during the debate that all objections to the Fannich scheme, on the River Conon in Ross-shire, had been withdrawn, and the scheme would therefore proceed. Power generation The board's generating capacity was mainly provided by the construction of "schemes" of linked hydro-electric stations, with multiple generators located across one or more catchment area. There were also steam driven and diesel engine driven power stations. When the board was first constituted it owned only two power stations: the oil-fired Kirkwall and Rothesay stations. Hydro-electric power stations The following hydro-electric stations were operational prior to nationalisation. Some were transferred to the South of Scotland Board. The principal schemes constructed by the board were: Affric-Beauly Breadalbane Conon Foyers Great Glen or Garry–Moriston Shin Sloy-Awe Tummel Valley In 1958 the following hydro-electric stations were in operation: Hydro-electric power stations under construction in 1958 were: The following additional hydro-electric stations were commissioned in the 1960s. By 1968 the installed capacity of all conventional hydro-electric power stations operated by North of Scotland Board was 1047.06 MW, and the total average annual output was 2911.4 GWh. Cruachan pumped storage scheme See main article: Cruachan Power Station The Cruachan power station (also known as the Cruachan Dam) is a pumped-storage hydroelectric power station commissioned in 1965. It can provide 440 MW of power and has a capacity of 7.1 GWh. Steam power stations There were two steam power stations in 1958. Diesel engine stations There were nine diesel fuelled power stations in 1958. Transmission The supply of electricity was through the Highland Grid operating at 132 kV. In 1958 this comprised 1,630 circuit miles with 31 substations. The total length of all mains was 17,369 circuit miles. By April 1989 there were of 275 kV lines; of 132 kV lines; and of lines operating at less than 132 kV. Distribution area Supply to customers was through 13 distribution areas. The areas' supply capacity and key data for 1956 were as follows: Operating data 1949 to 1989 Key operating data for the North of Scotland Hydro-Electric Board is summarised in the table. The amount of electricity supplied by the board, in GWh, is shown on the graph. Dissolution North of Scotland Electricity plc was formed in 1989 to