Zalew Sulejowski
The Zalew Sulejowski is an artificial lake, a reservoir, in the Łódź Voivodeship built in the years 1969-1974 on the territories of three gmin: Tomaszów, Piotrków and Wolbórz. The aim of this reservoir was to supply a fresh drinking water to the city of Łódź and Tomaszów Mazowiecki. At full capacity the reservoir contains up to 95 million m3 of water and has an average depth of 3.3m.
The reservoir is held back by a dam of concrete and earth with a length of 1,200 m and a height of 16 m. The shoreline perimeter extends to 58 km (36 mi).
Alongside its normal functions of retaining water and energy generation, the artificial lake created as a result of the dam is used for a variety of recreational purposes such as, but not limited to, windsurfing, kayaking and sailing.