New vented dam will be ready by Dec 2013: Mayor

New vented dam will be ready by Dec 2013: Mayor

Mangalore Mayor Praveen offered ‘Ganga pooja’ to river Nethravathi at Thumbe vented dam on Tuesday.

A partial view of the spot where the work on the vented dam is under progress.Speaking at the sidelines of the programme, Karnataka Urban Water Supply and Drainage Board (KUWSDB) Executive Engineer L N Anand said that the new vented dam, which is under construction at Thumbe is likely to be completed by December 2013.

The height of the new vented dam will be 12 metres. The cost of the vented dam has almost double from the original estimated cost of Rs 40 crores. Now it is expected to cost Rs 79.5 crores.

“The cost has been revised because the height of the dam has been increased. Further increase in the grade of concrete mixture from lean mix to rich grade and in the tender premium too have contributed to the cost hike. The new vented dam is coming up on the downstream of the existing dam at Thumbe,” he said. 

He said that owing to shortage of labourers, the work is getting delayed. Materials for the construction of the dam are ready.

Once the new vented dam is complete, then even if there was zero inflow in the river water stored in the dam in a given year, there would be enough water for supply for five months to the city.

“The existing dam can store water for three months with zero inflow. The storage capacity of the new vented dam is 14.75 million cubic metre. The capacity of the existing dam is 4.89 million cubic metre.

It will have automatic sluice gates and will regulate water at optimum level even during rainy season. There are 134 piers in the existing dam while the new dam will have 31 piers.

He said that the Geologist from Karnataka Power Corporation Ltd will certify the foundation of the dam. The third party inspection on the quality of the dam will be carried out by the Indian Register of Shipping.

The State Government has released Rs eight crore for the vented dam so far.
The Mangalore City Corporation will release Rs three crore for the vented dam next week.

Speaking after offering Ganga pooja, Deputy Mayor Geetha Nayak said that worshipping nature is integral part of Indian culture. There is a need to create awareness on conservation of water among students.

Opposition Leader Lancelot Pinto, former mayor Shashidhar Hegde and others spoke. MCC Commissioner Dr Harish, Joint Commissioner Shrikant Rao  and others were present.

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