Use the player menu to download. 3 dots in the lower right corneror right click"save video as" or "download"... Play / download in a better video resolution Imboulou dam and lake on Lefini river Congo Pool Description The Imboulou Dam is a dam on the Léfini River, near Ngabé, Ngabe District, Pool Department, Republic of the Congo, about 300 kilometers north of Brazzaville. It was inaugurated by President Denis Sassou-Nguesso on the 7 May 2011.