Lake Tarnobrzeg, Machowski Reservoir or Lake Machów is an artificial lake created in a former sulfur mine in Machów, Tarnobrzeg, Poland.

This article relies largely or entirely on a single source. (March 2012)

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Lake Tarnobrzeg or Machowski Reservoir
Lake Machowski in 2009
Lake Tarnobrzeg or Machowski Reservoir
Location	Machów Tarnobrzeg Subcarpathian Voivodeship Poland
Coordinates	50°32′37″N 21°38′34″E
Built	1994
Surface area	4.55 km2 (1.76 sq mi)[1]
Max. depth	42 m (138 ft)

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The lake was opened in 2010 after 16 years of construction and landscaping. The re-cultivation work began in the old mine in 1994. The total cost of changing post the industrial area into lake totaled 1.5 billion PLN. The project was paid for by the State Treasury.

In 2011 the Tarnobrzeg City Council, together with the Mayor of Tarnobrzeg, interpellated with the Polish Ministry of the Interior and Administration to change the official name to Lake Tarnobrzeg.^[2]