The Drahovce – Madunice water project is a multipurpose project situated on the lower reaches of the Vah River between the towns of Piestany and Hlohovec on the river kilometers 119.200 – 101.200. The project starts with the Drahovce (Sĺnava) Reservoir located near the lower end of a waste water canal from the Horna Streda hydroelectric power plant and ends in the place where a waste water canal from the Madunice hydroelectric power plant emplies into the Vah just above the town of Hlohovec, at the upper limit of the planned Sereď water project.
