Lake Vrutak

Lake Vrutak is artificial reservoir on the Trebišnjica river in Popovo Polje, near Hutovo village, Bosnia and Herzegovina. The lake serves as compensation and storage basin for Pump-Storage Hydroelectric Power Plant "Čapljina".
Hydropower and irrigation system.
Lake Vrutak is the last and smallest of three artificial reservoirs in hydroelectric power plant system Trebišnjica - HES "Donji Horizonti", and serves as compensation basin for Pump-Storage Hydroelectric Power Plant "Čapljina". Other two being Bilećko Lake, the first and largest, and flow-regulation (compensation) basin Trebinjsko Lake just upstream of Trebinje.