About Chirmiri
Chirmiri is a hill station and a Municipal Corporation in the Koriya district of the state of Chhattisgarh, India.
At first, it was privately owned coal-mines. Dadu Lehri, as he is lovingly called, is said to be the founder of Chirimiri. Tata Iron and Steel Company then initiated prospecting of coal but no mining was carried out by them. The Chirimiri colliery was opened in 1930 (production started in 1932), New Chirimiri colliery came up in 1942, Pure Chirimiri colliery in 1945, and North Chirimiri colliery in 1946. Subsequently, New Chirimiri Pondi Hills, West Chirimiri, Duman Hill and Korea collieries started operating.
Source : Wikipedia