Scottish Water said that the dam holds 64 billion litres of fresh water - the average bath uses about 180 litres - and at 55m high (180ft) it remains the highest earth embankment dam in the UK.

The embankment dam is the most common in the UK, which has over 3,000 of them, including one dating back to the 9th century.

Scottish Water says Megget is the largest earth embankment dam in the UK They were to be moved on as work began on a massive construction project in 1977 that would take six years to complete.