Death in the Deep: What the Teesta Tunnel Buried Along With Its Workers

Question (10 marks, ~150 words):

Hydropower development in the Himalayas exemplifies the conflict between energy needs and ecological fragility. In the light of recent tunnel disasters, evaluate the adequacy of India's environmental clearance and safety regime, and suggest safeguards for infrastructure projects in fragile mountain zones.

Introduction:

• The suspected methane burst in NHPC's Teesta Stage-VI tunnel in Sikkim — in a seismically active basin of young, fractured rock — is the latest in a series of underground disasters that test India's clearance and safety regime.

Why the regime looks inadequate:

• Known geology: gas pockets, seismicity and GLOF exposure (South Lhonak destroyed Teesta-III in 2023) were foreseeable, yet risk modelling and functioning gas-detection/ventilation remain in question.
• A pattern, not accidents: Silkyara (41 trapped, 2023) and Meghalaya's mine blast (~30 dead) point to weak enforcement, not missing rules.
• Project-by-project EIA misses cumulative, basin-level risk on rivers carrying cascades of dams.

Safeguards for fragile mountain zones:

• Independent, published audits of environmental-clearance compliance; liability fixed on developers and regulators.
• Mandatory geotechnical and gas-risk modelling, real-time monitoring, ventilation and emergency-egress standards for tunnelling (learning from the Silkyara aftermath and NDMA guidelines).
• Cumulative impact assessment for river basins; early-warning systems for GLOFs; worker-safety codes with criminal consequences for breach.

Way forward:

• Rescue first; then an independent review of Teesta-VI's clearance conditions, extended to the entire Teesta cascade.

Conclusion:

• A clean-energy transition in the Himalayas is viable only if safeguards exist underground, where the workers are — not merely on paper.