The paper reviews the options of reconstruction of the operating system of technical water supply of Iriklinskaya GRES with the construction of a group of cooling towers. The Decree of the Government of the Russian Federation on the annual increase in a payment for use of water objects that are in federal ownership entered into force in 2015. In order to effectively spend the enterprise's money, a decision of reconstruction has been made, with the purpose of increasing the volume of recycled water. The option for rational placement of water intake constructions and cooling towers has been offered. We have presented the results of thermal calculations for joint operation of the system of technical water supply and power units. The most effective reconstruction option has been chosen based on technical and economic comparison.