The Iron Gate I Hydroelectric Power Station is the largest dam on the Danube river and one of the largest hydro power plants in Europe. It is located on the Iron Gate gorge, between Romania and Serbia.
The Romanian side of the power station produces approximately 5.24 TWh annually, while the Serbian side of the power station produces 5.65 TWh. The discrepancy in power output between the two halves is due to the generating equipment. While Romania's equipment is newer and thus more efficient, it is proving more unreliable; resulting in increased downtime for maintenance/repairs, and consequently lower annual power output overall.
Wikipedia https://en.wikipedia.org/wiki/Iron_Gate_I_Hydroelectric_Power_Station
Address DN6A, Romania
Coordinates 44°40'16.384" N 22°31'46.155" E