- 6 mnt/year Tara mine returns to auction post Chhattisgarh govt’s 2025 request
- Multiple statutory, environmental approvals still required before mining can start
The successful auction of Chhattisgarh’s Tara (Revised) coal block has reopened the debate over expanding mining in and around the environmentally sensitive Hasdeo Arand landscape.
The Union Coal Ministry has clarified that the block was returned to auction following a December 2025 request from the Chhattisgarh government. This followed the state’s earlier request to exclude Tara and other Hasdeo-region blocks from commercial auctions.
The contrasting communications have turned what was commercially one of India’s most competitive recent coal auctions into a wider political and environmental controversy.
State’s position changed between 2023 and 2025
Tara was initially offered under the seventh tranche of commercial coal-mine auctions in 2023. However, the Chhattisgarh government wrote to the Centre in June 2023 seeking the exclusion of nine blocks in the Hasdeo region.
That request cited a unanimous Chhattisgarh Assembly resolution of July 2022 seeking protection of the Hasdeo area, along with recommendations from the state’s forest and climate-change department. Tara was subsequently withdrawn from the auction process.
The Coal Ministry said blocks overlapping the Lemru Elephant Corridor were not included in subsequent auction rounds.
However, the state government wrote to the ministry again on 11 December 2025, stating that Tara lay outside the Lemru Elephant Corridor and could be offered in an upcoming auction. Central Mine Planning and Design Institute Limited subsequently revised the block boundary by removing the corridor’s influence zone, according to the ministry.
Tara (Revised) was then included in the fifteenth commercial auction round and successfully auctioned in August 2026. The ministry maintains that the re-auction followed the state’s own request and did not disregard its earlier objections.
Strong competition produces high revenue-share bid
Tara (Revised), located in Chhattisgarh, has geological resources of approximately 293.91 mnt and a peak-rated capacity of 6 mnt/year. Nine bids were received, indicating unusually strong interest. CG Syn-Gas and Chemicals Limited emerged as the successful bidder with a final revenue-share offer of 37.5%, substantially above the auction’s 4% reserve price.
The block is estimated to generate annual state revenue of over INR 1,200 crore and create employment for over 8,000 people. The winning offer was also the highest among the six blocks concluded under the fifteenth round and the second attempt of the thirteenth round. The other successful offers ranged from 4.5% to 10.25%.
A 37.5% revenue share demonstrates the block’s strategic attractiveness, but it also creates a demanding cost structure. The successful bidder will need to absorb the government revenue share alongside mining, transport, rehabilitation, environmental-management and statutory-compliance costs.
The economics could be supported by high mine utilisation and value-added downstream use rather than relying solely on merchant coal sales. CG Syn-Gas and Chemicals was incorporated in August 2025 as a step-down wholly owned subsidiary of Adani Enterprises through Mundra Synenergy Limited, with chemical manufacturing as its stated business.
Auction does not amount to permission to mine
Chhattisgarh Mineral Development Corporation has stressed that only the auction has been completed. The award does not allow immediate mining.
The project must still obtain an approved mining plan, mining lease, environmental clearance, forest clearance and other statutory permissions. Applicable land, forest-rights and local-consultation procedures must also be completed before production can begin.
Consequently, the block’s 6 mnt/year capacity should not yet be incorporated into India’s near-term coal-supply outlook. Development will depend on how quickly the approvals, land-access and rehabilitation processes progress.
Environmental and political opposition returns
Opposition groups argue that revising the boundary does not fully address Tara’s wider ecological impact. Hasdeo campaign organisations and the Congress have sought cancellation of the auction, citing forest fragmentation, tribal rights, biodiversity and potential human-elephant conflict.
They also point to the Chhattisgarh Assembly’s 2022 resolution and the state’s 2023 request to exclude nine blocks. Campaigners contend that assessing Tara only against the notified corridor boundary may understate its connection with the wider Hasdeo-Lemru forest and wildlife landscape.
The controversy therefore extends beyond whether Tara technically falls inside the corridor. The larger issue is whether additional mining should proceed within an interconnected forest region already affected by coal development.
What does it mean for India’s coal sector?
Tara illustrates the tension at the centre of India’s commercial coal programme.
From a supply perspective, a 6 mnt/year mine could support domestic production, reduce dependence on imported coal and provide long-term feedstock for industrial or coal-conversion projects. The nine bids and elevated final offer demonstrate that investors continue to value large, well-explored coal resources.
However, the case also shows that a successful auction is only the beginning of mine development. Forest clearances, local consent, land access, litigation and political changes can materially affect commissioning timelines.
The most significant development is therefore not simply that Tara has been auctioned. It is that the Chhattisgarh government’s revised position enabled the block to return after its earlier withdrawal. Whether that administrative shift is sufficient to overcome the project’s environmental and social challenges will determine if Tara becomes a producing asset or remains tied up in a prolonged approvals dispute.
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