Piast Coal Mine
The Piast coal mine is a large mine in the south of Poland in Bieruń, Silesian Voivodeship, 310 km south-west of the capital, Warsaw. Piast represents one of the largest coal reserve in Poland having estimated reserves of 150 million tonnes of coal. The annual coal production is around 5 million tonnes.
- "Oddział KWK "Piast"". Kompania Węglowa. 2010. Retrieved 2010-09-28.
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