Iori Cascade unites three seasonal regulation power plants Sioni HPP (9.14 MW), Satskhenisi HPP and Martkophi HPP (3.86 MW).
Satskhenisi HPP is located in the village Saakadze. It works on Zemo Samgori irrigation system channel. Its installed capacity is 14 MW. Average annual capacity is 86 GWh. Satskhenisi HPP was put into operation in 1952.
Martkophi HPP is located in Gardabani region village Martkophi. It works on Zemo Samgori irrigation system channel. Its installed capacity is 3.8 MW. Average annual generation 14 GWh. Martkophi HPP was put into operation in 1952.
Sioni Dam and Sioni HPP represent initial buildings of Zemo Samgori irrigation channel system. Its installed capacity is 9.0 MW with average annual generation 33 GWh. The HPP was put into operation in 1964.