difference in elevation of 72 metres (236 ft). The biggest staircase lock is Vrangfoss, which has five chambers and a lifting height of 23 metres (75 ft). The...

In the river, there are four hydroelectric power stations: Eidsfoss, Vrangfoss, Ulefoss, and Aall-Ulefoss. List of rivers in Norway Rosvold, Knut A....