Inter‑State River Water Disputes Act, 1956

The Supreme Court heard contempt petitions filed by the State of Tamil Nadu (and a private party) alleging that the Union of India had failed to frame a Cauvery water‑management scheme within the six‑week period ordered by the Court. The Court examined objections raised by Karnataka and Kerala to certain clauses of the…

The State of Tamil Nadu filed a suit under Article 131 of the Constitution against the State of Karnataka and the Union of India, alleging that Karnataka's construction of a 500 Mcft check‑dam and related pumping schemes on the Markandeyanadhi tributary of the Pennaiyar River violated the 1892 and 1933 inter‑state wate…

The Supreme Court examined appeals filed by Karnataka, Kerala and Tamil Nadu challenging the final order of the Cauvery Water Disputes Tribunal. The core issue was whether Article 262(2) of the Constitution together with Section 11 and Section 6(2) of the Inter‑State River Water Disputes Act, 1956 bars the Court’s powe…

The case concerns the Mullaperiyar dam, a masonry dam built on the Periyar River in Kerala but owned and operated by Tamil Nadu. Tamil Nadu filed a suit under Article 131 of the Constitution seeking to enforce its rights under the 1886 lease agreement and to raise the dam’s full reservoir level (FRL) to 142 ft, as prev…

The State of Tamil Nadu filed a suit under Article 131 of the Constitution against Karnataka and the Union of India, seeking a declaration that Karnataka's construction of check dams and diversion structures on the Pennaiyar River without Tamil Nadu's consent was illegal and violated the fundamental rights of its inhab…