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a city and the administrative center of Dzun-Khemchik Raion, Tuva ASSR. Chadan is located in the western part of the Tuva Basin, on the Chadan River of the Enisei basin, 225 km west of Kyzyl on the Kyzyl–Ak-Dovurak highway. Chadan has a butter factory and an industrial combine. Hard coal is mined in the area.