<Li> The Niangara Bridge on the Uele, some 2,000 km along the tributary from the rivermouth, near the town Niangara . </Li> <Li> The Dungu Bridge on the Kibali, some 2,050 km along the tributary from the rivermouth, near the town Dungu, at the confluence of Dungu and Kibali rivers, where the Uele river is formed . </Li> <Li> The Kalimva Bridge on the Kibali, some 2,250 km along the tributary from the rivermouth, near the town Kalimva . </Li> <P> There are two bridges on the Lulua river in the provice of Kasai of DR Congo: </P>

Why is the congo river significant to the economy of central africa (site 1)