base of either bank, consisting of a long line of piled boulders of massive size, was buried in the tempestuous surf. The roar was tremendous and deafening. I can only compare it to the thunder of an express train through a rock tunnel." Since the falls, which start with the Yellala Falls just above Matadi, are a barrier to navigation on the lower part of the river, the Matadi-Kinshasa Railway was constructed to by-pass them. "Grand Inga" proposed hydroelectric project Inga Falls on Congo River is a group of rapids in the latter portion of the Livingstone Falls, after the Malebo Pool. The Congo falls about 96 metres within this set of cataracts. The mean annual flow rate at Inga Falls is about 42,000 cubic metres per second. Given this flow rate and the 96 metre fall, it is possible to calculate that the Inga Falls alone has a power potential of approximately 40 GW. In 2014, Inga Falls was the site of two large hydro-electric power plants and is being considered for a much larger hydro-electric power generating station known as Grand Inga. The Grand Inga project, if completed, would be the largest hydro-electric power generating facility on Earth. The current project scope calls for the use of a flow rate 26,400 cubic metres per second at a net head of 150 metres; this is equivalent to a generating capacity of about 38.9 GW. This hydro-electric generator would be more than double the current world record holder, which is the Three Gorges facility on the Yangtze River in China. See also List of waterfalls by flow rate References Congo River Waterfalls of the Democratic Republic of the Congo Waterfalls of the Republic of the Congo International waterfalls Freshwater ecoregions of Africa Ecoregions of the Democratic Republic of the Congo Ecoregions of the Republic of the Congo David Livingstone