The Cruachan pumped-storage development

The term 'pumped storage' gives no clue to the uninitiated that such a project is basically a hydroelectric scheme. This may explain why pumped storage does not seem to arouse the same strong feelings as are customarily reserved for straight hydroelectric schemes. Nevertheless, pumped storage is a form of hydroelectric development that, by avoiding total dependence on nature, is characterised by the firmness of its output.