Please observe that, due to technical limitation of the hydropower plants that are planned to be visited, there is limited amount of Technical visits available for booking through the Conference registration system and can be paid separately:

A technical visit to two hydroelectric power plants, HPP Zakučac (544 MW) and HPP Kraljevac (67.2 MW) have been planned for May 26, 2022.

  1. Departure from the hotel Radisson Blu Resort & Spa at 10.30 am 
  2. Arrival to HPP Zakučac at 11:00 am
  3. Sightseeing of HPP Zakučac – ≈2 hours
  4. Departure from HPP Zakučac at 1:00 pm
  5. Arrival to HPP Kraljevac at 1:30 pm
  6. Sightseeing of HPP Kraljevac – ≈2 hours
  7. Departure from HPP Kraljevac – 3:20 pm
  8. Arrival at the Restaurant Radmanove Mlinice – 3:30 pm
  9. Return to the hotel – 6.00 pm

The price is:
                      375 HRK (50 EUR, 60 USD) – for participants
                      225 HRK (30 EUR, 36 USD) – for students
and includes the lunch, bus transportation and entrance for HPPs. Registrations can be done online through the Conference registration system or on the spot until Tuesday 24.05.2022. until 22:00. An estimate of a driving distance is:

Meeting locationHPP Zakučac25 km
HPP ZakučacHPP Kraljevac30 km


More than 15% of Croatian electricity needs are produced every year in HPP Zakučac.
Energy production:
The hydropower plant Zakučac or HPP Zakučac is a derivative hydro power plant built in the downstream river Cetina, near Omiš (Split-Dalmatia County), two kilometers from the firth of river into town Omiš. The largest plant on the Cetina river basin is also the largest hydropower plant in Croatia, according to installed power and potential electricity generation. The total installed power of HE Zakučac is 544 MW (4 Francis turbines x 144 MW ). HE Zakučac was built in two phases; The first phase of construction was completed in 1961, while the second phase of construction was completed in 1980. Reconstruction of the HPP brought new 52 MW of installed power and 58 Gwh of energy. The installed volume flow of HE Zakučac is 220 m3 / s ( 4 x 60 m3 / s). Constructive water drop is 250.4 meters. The maximum annual electricity production is 2 430 GWh (2010)

Short technical description:
The concrete gravity dam Prančevići, 35.0 m high, (try to google-map brana Prančević and see where it is in comparison to the HPP) is accumulating water for full daily leveling, a useful volume of 3.0 hm3. Two parallel feed tunnels of 6.1 and 6.5 m diameter continue to the input device. The lengths of the tunnels are 9876.0 and 9894.0 m. 14400 m3 of water goes through the tunnels in a minute (full power – that’s 5 Olympic pools). The water chamber system is located at the end of the tunnels and consists of three water chambers (one for each tunnel and one for each). Immediately behind the common water chamber the tunnels are drawn into pressure pipelines. Approximately 35.0 m from the raft there is a latching chamber (9.0×16.0x62.5 m) with butterfly closures and vent valves. Pressure pipes are constructed as cast steel tubes of length 279.30 m. The main production units and transformers are located in the underground engine room measuring 18.50×37.0x102.0 m and 16.0×12.0x44.0 m (cavity transformers). The transformer space is connected to the outer tunnel (220 kV, 110 kV and 30 kV) by the cable tunnel, and the tunnel length is 322.0 m.2


HPP Kraljevac was the first hydro power plant on the Cetina River, located 21 kilometers upstream from the estuary of the Cetina, near a place called Zadvarje in Split-Dalmatia County. It was commissioned on 19 March 1912. It was the biggest hydro power plant in south east Europe and one of the biggest in the whole Europe at that time and many years later, according to its installed power and generation.

The history of planning, designing and constructing hydro power plant Kraljevac shows the spirit of united Europe many years before the creation of the European Union. At the end of the 19th century, Austro-Hungarian Monarchy started researching the possibilities of using hydrological potential of the Cetina River, especially in its canyon, near Zadvarje. The German company “Schuckert&Co”, one of the precedents of today’s company Siemens, drew up the basic project for using a significant natural fall on the waterfall Gubavica in 1897, and the first real project was made by engineers Dešković & Wagner in 1899. In 1902, a Belgian expert Macquet dealt with five options of using water potential on a part of the Cetina River downstream from the place of Trilj and he suggested the most favorable option similar to today’s hydro power plant Zakučac.

Based on the project of Dešković & Wagner, the Austrian company “Wasserwerke” from Vienna got in 1904 a water right concession for using concentrated fall Gubavica. A detailed project for the construction of hydro power plant Kraljevica was made by a Swiss engineer in Geneva in 1906, and it was modified by the executive director of the company “Sufid”, E. Cairo. The company “Wasserwerke” sold in 1907 its management rights to the Italian company, “Sufid”, and the equipment was bought from a Hungarian producer “Ganz”.

In the first construction phase (1908 – 1912) led by the company “Sufid”, two aggregates were built with the total power of 25.6 MW. French company “La Dalmatienne”, founded in Paris, bought out all the assets of “Sufid” company in the second construction phase (1928 – 1932) and it built two more aggregates with the total power of 41.6 MW. At the end of the second construction phase HPP Kraljevac had four aggregates and its total installed power was 67.2 MW.
Even today, after one century of its work, HPP Kraljevac delivers precious kilowatt hours of certified green electricity into the Croatian energy system.