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Regular-article-logo Wednesday, 18 June 2025

Down in the belly of Tallah tank

The more-than-a-century-old giant water tank in Tallah is undergoing maintenance and repair. The Calcutta Municipal Corporation (CMC) has engaged Bridge and Roof Company Limited to implement the Rs 76-crore retrofit design for refurbishment drawn up by the department of construction engineering at Jadavpur University. Metro spent some time inside the metal behemoth to witness the work 

TT Bureau Published 05.01.18, 12:00 AM

The more-than-a-century-old giant water tank in Tallah is undergoing maintenance and repair. The Calcutta Municipal Corporation (CMC) has engaged Bridge and Roof Company Limited to implement the Rs 76-crore retrofit design for refurbishment drawn up by the department of construction engineering at Jadavpur University. Metro spent some time inside the metal behemoth to witness the work 

The compartment in the south-east corner, where repair is underway. Behind the partition walls are other compartments that are still full of water.
A steel plate welded to the spot where a bulge had formed. Over a half a dozen big bulges have been discovered at the base of the dry compartment. The bulges were noticed after a two-feet layer of sediment was removed from the bottom of the tank. Engineers from Jadavpur University, the Calcutta Municipal Corporation (CMC) and Bridge and Roof Company Limited, a central government enterprise, have no definite explanation for the phenomenon. “We are not sure what exactly caused the bulges,” said the director general of CMC (water supply), Bibhas Kumar Maity.
One of the columns that hold the tank aloft being repaired. Each column is 110ft high. The columns have corroded in some places.
An engineer removes a section of the 12mm metal floor where one of the bulges had formed. A steel plate will be welded on the spot. The Steel Authority of India is supplying the steel plates.
A view of the roof of the tank. The water most of Calcutta drinks is stored below in four compartments. The compartment in the south-east corner is undergoing repair at present. 

 

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