A Supreme Court-constituted expert panel will submit its safety assessment of the Mullaperiyar dam within the next two weeks, according to official sources familiar with the proceedings. The committee’s report is expected to influence the court’s eventual ruling on the century-old structure’s structural integrity and the permissible storage levels that have divided Kerala and Tamil Nadu for decades.
The dam, located in Kerala’s Idukki district but operated by Tamil Nadu under a 999-year lease agreement signed in 1886 under British rule, has long been at the center of an interstate dispute touching on water sharing, public safety, and federal authority. The three-member expert panel was constituted by the apex court to undertake a comprehensive evaluation of the dam’s structural condition and recommend safety protocols going forward.
What Happened
The committee’s impending submission comes amid continuing disagreement between the two southern states over the maximum water level the dam can safely hold. Kerala has consistently maintained that storage should not exceed 136 feet, citing structural vulnerabilities in the masonry gravity dam constructed in the late 19th century. Tamil Nadu, which depends on the reservoir for irrigation in its southern districts and for drinking water supply, has pressed for permission to raise the water level higher, arguing that the structure has been reinforced and meets modern safety standards.
The panel was tasked with assessing the dam’s current structural status, reviewing past and ongoing safety studies, and recommending operational and engineering measures. Its submission within two weeks will mark a critical procedural step before the Supreme Court takes up the substantive questions raised by both states.
Why It Matters
The Mullaperiyar dispute sits at the intersection of public safety, interstate water governance, and historical obligations. The dam was built between 1887 and 1895 across the Periyar River, primarily to divert water eastward to Tamil Nadu’s drought-prone Madurai region. Because the reservoir lies entirely within Kerala’s territory while serving Tamil Nadu’s needs, questions of control, liability, and risk allocation have remained politically charged for more than four decades.
Kerala’s safety concerns intensified after fears about the dam’s age, particularly following seismic activity in the region and debates over whether the original 1895 structure could withstand high water pressures. Tamil Nadu has consistently argued that the dam underwent strengthening works and that storage levels up to 142 feet, and later 152 feet, are safe. The Supreme Court has, in earlier rulings, permitted incremental increases in the storage level while directing periodic safety reviews, leaving the underlying dispute unresolved.
For the thousands of residents living downstream of the dam in Kerala’s Idukki and Ernakulam districts, the safety question carries direct physical risk. Any catastrophic failure would affect densely populated areas along the Periyar river basin. For Tamil Nadu, the storage level determines the volume of water available for agriculture in districts that have historically depended on Periyar waters.
Background and Context
The lease agreement of 1886 between the Madras Presidency and the Kingdom of Travancore gave Tamil Nadu rights over the dam and the waters it impounds for a period of 999 years. The agreement predated Indian independence and the reorganization of states along linguistic lines, which placed the dam’s location within the state of Kerala while leaving its operator as Tamil Nadu.
The dispute escalated in the 1970s and 1980s when Kerala raised structural safety concerns and enacted legislation, the Kerala Irrigation and Water Conservation Act, that sought to restrict the dam’s operations. Tamil Nadu challenged the state legislation, and the matter eventually reached the Supreme Court.
In its 2006 ruling, the court permitted Tamil Nadu to raise the water level to 142 feet and directed the formation of an expert committee to monitor safety. A subsequent ruling in 2014 allowed the level to be raised to 152 feet, subject to ongoing safety assessments and the completion of specific strengthening measures identified by the empowered committee.
Since then, periodic reviews have alternated between judicial oversight, technical assessments, and political negotiations. Kerala has at times accused Tamil Nadu of operating the dam beyond safe parameters during monsoon releases, while Tamil Nadu has accused Kerala of using safety concerns as a pretext to restrict water supply. The current expert panel was constituted to break the impasse by providing an updated, court-mandated technical assessment.
Analysis:
The expert panel’s forthcoming report is significant because it converts a politically charged dispute into a technical record that the court can weigh. Past Supreme Court rulings have emphasized that decisions on dam safety must be based on scientific evidence rather than state-level political positions. By commissioning a fresh safety study, the court has signaled that the next phase of the dispute will turn on engineering data, hydrological modeling, and structural assessments rather than on competing legal interpretations of the 1886 lease.
The report’s conclusions will also test the effectiveness of prior strengthening works carried out at the dam. Independent studies and court-appointed committees have, over the years, produced differing assessments of the dam’s resilience. Whether the current panel endorses, revises, or departs from earlier findings will shape the trajectory of the case and the parameters within which both states must operate.
For Kerala, the panel’s report is expected to address whether the dam’s masonry structure, seepage patterns, and foundation conditions support continued storage at or near 152 feet. For Tamil Nadu, the report will influence whether additional investments in dam modernization are required to justify higher storage levels.
What to Watch Next
The primary milestone is the panel’s submission of its report within the next two weeks. Following submission, the Supreme Court is likely to issue notice to both states and consider the findings alongside any responses filed by the parties.
Key elements likely to be scrutinized include the panel’s assessment of seepage, structural deformation, and spillway capacity; its recommendations on maximum permissible water levels; and any proposed engineering or monitoring measures. The court may also seek responses from the central water regulatory bodies, including the Central Water Commission, on national dam safety standards applicable to the structure.
Any divergence between the panel’s findings and the positions advanced by either state could prolong the litigation, with the court potentially ordering additional studies or appointing a fresh committee. Conversely, if the panel’s recommendations are accepted by both states, the dispute could move toward an operational settlement, though political disagreements over implementation are likely to continue.
Conclusion
The submission of the Mullaperiyar dam safety report within two weeks represents the most significant technical milestone in the dispute in recent years. With both Kerala and Tamil Nadu holding entrenched positions on storage levels, the panel’s findings will carry weight in determining whether the 19th-century structure can continue to operate under current arrangements or whether substantial changes to its management are required. The Supreme Court’s eventual ruling, informed by the report, will shape not only the dam’s operational parameters but also the broader framework for resolving interstate water disputes involving aging colonial-era infrastructure.
Sources
The Hindu – https://www.thehindu.com/news/national/kerala/panel-to-submit-safety-report-on-mullaperiyar-dam-in-two-weeks/article71415690.ece
Source: The Hindu – National
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Story synopsis gathered from: The Hindu – National — source
