Eastern Coalfields Limited is inviting tenders for the exploration, development, and operation of the Amarkonda Murgadangal coal block through a bidding process on the GEM portal. Bidders must meet specific technical and financial criteria to participate, including a required bid security of ₹20 million and a minimum net worth of ₹672 million. A pre-bid conference will be held for potential bidders, with bid submissions due by specified deadlines.