Overview
On 25 June 2026, the Chief Ministers of Karnataka (D.K. Shivakumar), Telangana (A. Revanth Reddy) and Andhra Pradesh (N. Chandrababu Naidu) together with Union Jal Shakti Minister C.R. Patil inaugurated 33 new spillway gates at the Tungabhadra Dam. The event highlighted renewed inter‑state cooperation, but also exposed underlying disputes over related water projects.
Key Developments
- Installation of high‑grade steel spillway gates costing ₹51 crore and designed to last 60 years.
- Leaders pledged stronger cooperation on water sharing, citing the dam’s long‑standing formula and the role of the Tungabhadra Board.
- Union Minister promised a national programme to remove siltation from reservoirs, including Tungabhadra.
- Discussion on the Upper Bhadra project, which remains a point of friction.
Important Facts
- Dam irrigates about 16.4 lakh acres: 9.26 lakh in Karnataka, 6.25 lakh in Andhra Pradesh, and 87,000 in Telangana.
- Original storage capacity was 133 tmc ft; siltation has reduced it to roughly 106 tmc ft.
- In August 2024 a crest gate was washed away when the reservoir was full at 105 tmc ft. A temporary gate was installed before the new steel gates.
- The Centre had earmarked ₹5,300 crore for the Upper Bhadra project in the 2023‑24 budget, but later omitted it from central schemes.
Exam Relevance
The episode touches upon several UPSC‑important themes: inter‑state river water disputes (GS2), water‑resource management and dam sa