Sulejowski Reservoir

The Sulejowski Reservoir ( pl, Zalew Sulejowski, ) is an artificial lake, a reservoir created by a dam, built in the years 1969-1974 in the Łódź Voivodeship. The aim of this reservoir was to supply fresh drinking water to the city of Łódź and Tomaszów Mazowiecki. At full capacity the reservoir contains up to of water and has an average depth of .

History

The idea of constructing a reservoir on the Pilica river and Tomaszów Mazowiecki. At times, water rationing had to be implemented.

Water for Łódź

The construction began in 1969, from the outlet of Pilica, into the Vistula river; near Smardzewice. At the time the area was the border between the Łódź and Kielce Voivodeships. A slogan ''Water for Łódź'' (Polish: Woda dla Łodzi) was featured on a poster near the dam construction site and in the area where the forest had to be cleared for the future body of water.

A long and tall concrete and soil dam was constructed and a total area of was flooded. To transport the water from the reservoir, a long pipeline with a diameter of was built. A section of the pipe between the water treatment plant in Kalinko and a pumping station with storage tank in Chojny has an increased diameter - .

Early operations

The usage of the reservoir started in May 1973; at the time it was the largest body of water in Central Poland. Later that year, the first water delivery to Łódź was completed. In 1977 the pipeline was supplying of water per day, the highest waterworks production in the history of Łódź. By comparison, that volume was 2 to 2.5 times larger than the current usage by the whole city. The construction of a second pipeline with equal capacity was considered, but the decreasing demand from population, declining light industry and availability of other sources have made it redundant.

Construction of wells

Deep aquifers were discovered and mapped in the village of Bronisławów, near the reservoir's shore. They offered much higher quality water and by the 1990s plans were put in place to replace the reservoir's supply with deep wells. The same pipeline was used, but since 2004 it carries water extracted only from the 7 wells near Bronisławów and the reservoir is no longer used to supply water.

The total production capacity of the well is of water per day and per year.

New pipeline

The degrading quality of the old pipeline and reduced needs led to a construction of a new water delivery system. It was constructed in 2009-2010 and partially funded by European Union grants. The old pipeline was cleaned by a tractor with a custom-built elliptical plough and a new, fiberglass pipeline with a diameter of was laid inside the old one.

Geography

The Sulejowski Reservoir is located at an elevation of . It lies in the Łódź Voivodeship, at the border of Tomaszów Mazowiecki, Opoczno and Piotrków Powiats. The Pilica and Luciąża inflows are located at the southern end of the lake in Gmina Sulejów. The dam lies at the north-eastern boundary of the reservoir and the Pilica outflow is located at in Gmina Tomaszów Mazowiecki. Parts of the lake and the shoreline are within Gmina Wolbórz and Gmina Mniszków.

Parks and recreation

In addition to the water supply and energy producing functions, Sulejowski Reservoir serves as a center for recreation. There are multiple hotels and vacation homes in the vicinity and watersports infrastructure by the shoreline. The main activities are sailing, windsurfing, kayaking and fishing. The usage of motorboats is forbidden and a quiet zone is enforced across the lake.

A concrete pier has been constructed on the lake near Smardzewice. It will be revitalized in a new project set to begin in 2020. The total funding is 7.2 mln PLN, 4.7 mln of which will be funded by the European Union.

The reservoir lies at the northernmost part of the Sulejów Landscape Park which is centered around the Pilica river

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