Special: Water released from Mettur Dam. The last time Mettur was opened in May was in 1945.


The opening day details of Mettur Dam since the dam was constructed and here it is. For 3rd straight year in a row Mettur dam is going to be opened on or before June 12th with almost full storage of water in the dam. Initially 3000 cusecs has been released and it will be scaled up to 10000 cusecs by end of the day / tomorrow. This is the 11 time in 89 year history the dam is opened prior to June 12 and only the 5th time Dam has been opened in May month. The last time water was released in May was way back in 1945 but in those years the storage was only 60 tmc in the dam. Today the storage is close 90 tmc.

Great Flood years in Cauvery

The Mettur dam project work started on July 20, 1925 and after nine years of continuous work, the dam was commissioned on August 21, 1934. It has a gross capacity of 95630 mcft (95.63 tmc) and effective storage of 93470 mcft (93.47 tmc). Cauvery River has seen worst floods in 1924 with 4.56 lakhs cusecs flow just the year before dam work started. The other great flood years in Cauvery was in 1961, 1977, 1989, 1993, 2005 and 2018.

Opening stats of Mettur Dam

The customary date to release water from Mettur Dam is June 12 and in the 89 years of Mettur Dam history, lets see how many years the customary release has happened.

No. of years when dam was opened on 12th June : 18
No. of years when dam was opened earlier than 12th June : 11 (including this year)
No. of years when dam was opened beyond 12th June: 60

In the last 89 years (incl 2022), the dam has surplussed 41 times so far. This year even before monsoon starts, Mettur Dam is nearing 120 ft. .

The years when Mettur Dam is opened in May month are shaded in light green.

Current Storage levels in main Dams in Cauvery Catchment on opening day in last 13 years

When you compare with all the recent years 2022 is way ahead, So good days ahead for farmers in Tamil Nadu. From 2018 to 2022, there was a problem between TN and Karnataka on Cauvery water sharing, as there was plenty in all these 5 years, hope the trend continues.

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