Brief synthesisTarnowskie Góry Lead-Silver-Zinc Mine and its Underground Water Management System is located in the Silesian plateau of southern Poland, in one of Europe’s classic metallogenic provinces. It possesses a monumental underground water management system that reflects a 300-year ingenious development of hydraulic engineering. The water supply system was planned, integrated and managed as part of a contemporary underground metal mining system, illustrating how, in a surviving and fully accessible mine context, modern steam-pumped water systems were developed using mining technology. Criterion (i): Water Management System provides exceptional testimony to outstanding human technical creativity and application. Continuation of scientific research, documentation and survey is key to sustain the understanding and conservation of the Water Management System, its values and attributes.