A hydroelectric power storage facility built into a hollowed-out mountain that towers above the Scottish Highlands is to undergo a £1m upgrade in a bid to boost its efficiency, operator Drax Group announced yesterday. For almost 55 years the Cruachan Power Station has provided electricity storage for the grid by using its turbines to pump water from Loch Awe in the glen below to an upper reservoir built on a plateau a short way up Ben Cruachan mountain. The stored water can then be released back through the turbines to generate power quickly when demand increases.
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