mapragg power station or hydroelectric power station at the mapragg lake reservoir - vadura, switzerland / kraftwerke mapragg

architecture bridge building concrete conservation construction dam eco ecological electric electricity energy engineering environment environmental facility flood flow flowing fuel generating generation generator green hydro hydroelectric industrial industry kraftwerke lake landmark landscape mapragg mapraggsee natural nature oder plant power renewable reservoir river schweiz sky spillway station stausee storage structure supply switzerland technology tourism turbine vadura view wasserkraftwerk water waterfall