The “Iron Gate I” hydropower and navigation system is located at 943 km from the mouth of the Danube River into the Black Sea. Both Serbia and Romania each dispose over one power plant, ship lock and 7 spillway fields.
The HPP had been first time synchronized in 1970.
The most important characteristics of the “Iron Gate I” HPP with its appurtenant structures are given below:
- Reservoir
| Total volume | 2,800 million m3 |
| Mean inflow | 5,650 m3/s |
- HPP
| Type | non-diversion |
| Maximum head | 35.46 (31.50) m |
| Minimum head | 17.50 (18.00) m |
| Installed discharge | 5.040 m3/s |
| Installed power | 1,083 (2 x 171; 4 x 190) MW |
| Number of units | 6 (at the Serbian side) |
| Turbine type | Kaplan |
(Source: PU EPS Web site)