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Nagarjuna Sagar Tail Pond Project is a hydro-mechanical works at 21.065Km downstream of Nagarjuna Sagar Dam. This dam is constructed across River Krishna near Satrasala (V) of Guntur District in Andhra Pradesh. The Damaracharla village of Nalgonda District lies very close to this dam and is highly benefited from this Dam. The Rural Electrification Corporation had given the loan sought for the purpose.
The Nagarjuna Sagar Tail-Pond Dam, popularly known as the TPD, has been kept in cold storage for long and is of high importance in the APGenco's agenda for doing justice to the people of Telangana. The dam project proved to be of a great benefit for the Krishna delta.
The three other projects taken up for the Pulichintala delta and the two Godavari-Krishna links are the first one bringing 85 TMCFT from Polavaram to Prakasam Barrage, and the second one 200 TMCFT from Dummagudem to Nagarjuna Sagar.
According to the finalized design made, the TPD was constructed on the Krishna at Satrasala, 21 km below Nagarjuna Sagar but its reservoir was extended upto Nagarjunasagar to store 6 TMCFT. However, only one TMCFT was allotted for the reversible turbines of Nagarjuna Sagar powerhouse. But the entire pond was allowed to be emptied for supplementing the Krishna delta. TPD was mainly used to put the main powerhouse's reversible turbines into use. The powerhouse has eight units. The pond was mechanized in a way to allow seven reversible turbines to pump waters back into Nagarjuna Sagar.
Telangan did not use the water recycled into Nagarjuna Sagar from TPD exclusively, though it was projected likewise. After joining the reservoir, the water can be used for the Right Bank Canal or for power generation. Each of the main powerhouse's turbines consumes 120 MW of power to work in reverse direction, which means one-and-a-half times its original capacity, 100 MW.
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