the 84 metre high “Rockfill dam” wall,
which retains 200 million m³ (not 200 million cubic litres as
stated in yesterday’s almost daily email), is 640 metres long.

At the site, 356,700 m³ of material was extracted, and then 5
million m³ of gravel was added to form the dam structure and
30,700 m³ of concrete was used to construct a “Curtain wall”.