Dam safety and environmental compliance: courts defer to expert decisions but may order supervisory monitoring of clearance conditions.

The majority held that courts should not re-evaluate a well-informed technical decision on dam safety when expert bodies and the Government have already considered competing views, and found no arbitrariness, mala fides or irrationality in declining further 3-D non-linear or dam-break studies. It also held that environmental clearance conditions for a large project must be followed pari passu with engineering works, but the material did not show proven non-compliance. To secure continued observance without reopening settled issues, the matter was transferred to the High Court for monitoring and further compliance orders. A dissent would have imposed direct monitoring, independent expert oversight, and a halt on impoundment until safeguards were completed.

---

---

Issues: (i) Whether the Court should re-examine the safety of the Tehri Dam and the validity of the decision not to conduct further 3-D non-linear and dam-break studies. (ii) Whether the environmental clearance conditions, including pari passu implementation of safeguard measures and rehabilitation, were being complied with and what further monitoring directions, if any, were warranted.

Issue (i): Whether the Court should re-examine the safety of the Tehri Dam and the validity of the decision not to conduct further 3-D non-linear and dam-break studies.

Analysis: The majority treated dam safety as a matter examined repeatedly by expert bodies and the Government, and held that where a well-informed technical decision has been taken after considering competing expert views, the Court should not substitute its own assessment. The majority held that the decision not to undertake additional studies suggested only as a matter of abundant caution did not disclose arbitrariness, mala fides, or irrationality, and therefore did not justify judicial interference.

Conclusion: The Court declined to interfere with the safety decision and refused to direct further safety testing.

Issue (ii): Whether the environmental clearance conditions, including pari passu implementation of safeguard measures and rehabilitation, were being complied with and what further monitoring directions, if any, were warranted.

Analysis: The majority held that environmental conditions attached to clearance for a large project must be complied with pari passu with engineering works, but on the material placed it was not established that the project was being carried on in violation of those conditions. Instead of reopening issues already examined, the majority found it appropriate to ensure continued compliance through transfer of the matter to the High Court for monitoring. The majority also held that the High Court should not re-examine issues already decided, but could deal with compliance and enforcement aspects.

Conclusion: The matter was transferred to the High Court of Uttaranchal for monitoring and further orders on compliance, without reopening the decided issues.

Final Conclusion: The principal reliefs sought in the writ petition were not granted in the original forum, but the proceedings were disposed of by transferring compliance monitoring to the High Court for further supervision.

Concurring/Dissenting Opinion: D.M. Dharmadhikari, J. dissented in material part and would have issued direct monitoring directions, including an independent expert committee, a bar on impoundment until further safety studies and rehabilitation were completed, and ongoing grievance redressal arrangements.

Ratio Decidendi: In matters involving technical policy choices on environmental and infrastructural projects, the Court will not re-evaluate expert determinations on merits when the decision-making process is informed and non-arbitrary, but will ensure compliance with environmental clearance conditions and may direct supervisory monitoring to secure observance of those conditions.

---