About Birgaon
Biramitrapur (or Birmitrapur) is a town and a municipality in Sundargarh district in the state of Odisha, India. The majority industries in Biramitrapur and adjoining areas are based on mining. There are many Limestone mining and crushing units, and also many Sponge iron factories. BSL (Bisra Stone Lime) company holds the largest limestone and dolomite quarry in the area.
Source : Wikipedia