For hydropower generation in northern regions, the annual occurrence of river ice presents various problems of operation and management. The existence of ice can lead to a substantial loss in power production. This loss in power due to the presence of ice cover, however, can be mineralized with appropriate ice control operations. Frazil ice in water reservoirs may accumulate or can completely block the trash rack and rapidly and unexpectedly shut down the intake facility. Due to existence of solid ice cover, water is isolated from meteorological condition and frazil ice is not produced. This paper discuss possible operations on Włocławek reservoir leading to ice cover progression. Calibrated, two dimensional mathematical model DynaRICE was used for the simulations.