https://en.bharatpedia.org/w/index.php?action=history&feed=atom&title=Nagarjuna_Sagar_tail_pondNagarjuna Sagar tail pond - Revision history2026-10-28T11:31:31ZRevision history for this page on the wikiMediaWiki 1.43.6https://en.bharatpedia.org/w/index.php?title=Nagarjuna_Sagar_tail_pond&diff=519867&oldid=prevAdolphMassola0 at 10:48, 20 January 20262026-01-20T10:48:30Z<p></p>
<p><b>New page</b></p><div>{{Short description|Reservoir in India}}<br />
{{Cleanup rewrite|date=June 2025}}<br />
{{Use dmy dates|date=January 2019}}<br />
{{Use Indian English|date=January 2019}}<br />
'''Nagarjuna Sagar tail pond''' is a multipurpose reservoir located 21&nbsp;km downstream from the [[Nagarjuna Sagar Dam]] across the [[Krishna River]] near Satrasala in [[Palnadu district]], India. Its gross water storage capacity is 6 [[Tmcft]].<ref>{{cite web|url= http://www.hindu.com/2004/11/14/stories/2004111403190500.htm|archive-url= https://web.archive.org/web/20041205133404/http://www.hindu.com/2004/11/14/stories/2004111403190500.htm|url-status= dead|archive-date= 5 December 2004|work= [[The Hindu]]|title= Nagarjuna Sagar tail-pond dam likely to benefit Krishna delta |date= 2004-11-14|accessdate=11 May 2013}}</ref> The reservoir water spread area extends up to the toe of the Nagarjuna Sagar dam. The project was completed by July 2014.<ref>{{cite web|url= http://www.apgenco.gov.in/viewHTMLpage.asp?lfile=uploadedfiles/nstpd2022k6.htm|title= Nagarjuna Sagar tail pond dam progress report|accessdate= 11 May 2013|url-status= dead|archiveurl= https://web.archive.org/web/20130309235253/http://www.apgenco.gov.in/viewHTMLpage.asp?lfile=uploadedfiles%2Fnstpd2022k6.htm|archivedate= 9 March 2013}}</ref><br />
[[File:NagarjunaSagarDam.JPG|thumb|810 MW peaking power station at the toe of Nagarjuna Sagar dam]]<br />
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==Hydro electricity generation==<br />
Two units of 25 MW each hydro power generation units, were commissioned in the year 2017 by [[APGENCO]] to utilize the head available across the dam from the river flood water, and the water released to meet the [[Prakasam Barrage]] requirements.<ref>{{cite web |url=http://india-wris.nrsc.gov.in/wrpinfo/index.php?title=Nagarjunasagar_Tail_Pond_Power_House_PH01598 |title=Nagarjunasagar Tail Pond Power House PH01598 |accessdate=7 August 2016 |archive-url=https://web.archive.org/web/20180712173544/http://india-wris.nrsc.gov.in/wrpinfo/index.php?title=Nagarjunasagar_Tail_Pond_Power_House_PH01598 |archive-date=12 July 2018 |url-status=dead }}</ref><br />
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==Peaking power generation==<br />
Presently, the 700 MW reversible hydro turbines (7 x 100 MW) located at the toe of Nagarjuna Sagar Dam are unable to operate in [[Pumped-storage|pumping mode]] due to non availability of tail pond for storing the released water during the power generation mode. With the completion of tail pond, surplus electricity from the electricity grid would be used for pumping the water back to the [[Nagarjuna Sagar Dam|Nagarjuna Sagar reservoir]] and recycled for meeting peaking load on daily basis. Thus surplus electricity is consumed when it is available and used to meet the peak electricity requirements without letting the water out of the Nagarjuna Sagar tail pond. 700 MW peaking power for eight hours duration can be met from the one Tmcft of live storage water capacity available in the tail pond.<br />
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==Irrigation potential==<br />
200 Tmcft surplus water annually from the [[Godavari River]] is planned to be fed into this tail pond by the [[Dummugudem Lift Irrigation Scheme]] which is under execution. The water transferred to this tail pond will be pumped to the upstream 410 Tmcft gross water storage capacity Nagarjuna Sagar reservoir to feed its right and left bank canals. Thus Nagarjuna Sagar reservoir need not receive the water supply from the upstream [[Srisailam Dam|Srisailam reservoir]]. As the tail water level (48.33 m [[Mean sea level|MSL]]) of this dam is below the full reservoir level (53.34 m MSL) of the downstream [[Pulichinthala Project|Pulichintala dam]], surplus water in Pulichinthala reservoir can be pumped by envisaging [[Pumped storage hydroelectricity|pumped storage]] units from Pulichinthala reservoir to Nagarjunasagar reservoir via this pond. The retained water in the Srisailam reservoir would be used for upstream water uses from [[Jurala Project|Jurala]] and Srisailam reservoirs for irrigation needs in uplands of Telangana and Rayalaseema regions. The water from the Nagarjuna Sagar reservoir can also be pumped to the Srisailam reservoir by Srisailam left bank hydro electric power station (900 MW) in pumping mode in case of severe drought in Krishna river basin. Koilsagar lift irrigation project (near {{Coord|16|23|49|N|77|39|30|E|type:landmark_region:IN-AP}}), [[Bheema lift irrigation project|Rajiv Bheema lift irrigation project]], Nettampadu lift irrigation project (near {{Coord|16|18|58|N|77|40|21|E|type:landmark_region:IN-AP}}), [[Kalwakurthy lift irrigation scheme]], [[Srisailam Left Bank Canal]], [[Telugu Ganga project|Telugu Ganga irrigation project]], [[Handri-Neeva|Handri Neeva lift irrigation project]], [[Galeru Nagari Sujala Sravanthi Project|Galeru Nagari irrigation project]], Veligonda irrigation project etc. which are in advanced stage of construction, are depending on the Krishna river water available at Jurala / Srisailam dams.<br />
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A lift canal from the Krishna river ({{Coord|16|42|50|N|80|08|24|E|type:landmark_region:IN-AP}} at 20 m MSL) downstream of [[Pulichintala]] dam will be executed to feed [[Godavari River|Godavari]] water diverted from [[Polavaram Project|Polavaram]] to some of the existing command area (situated below 60 m MSL) under Nagarjuna Sagar right bank canal to facilitate extension of Nagarjuna Sagar right bank canal connecting to [[Kandaleru Dam|Kandaleru]] feeder canal / [[Somasila]] reservoir.<br />
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== Alternate to Dummugudem to Nagarjuna Sagar tail pond link canal==<br />
{{Main article|Polavaram Project#Future potential}}<br />
[[Dummugudem Lift Irrigation Scheme|Dummugudem to Nagarjuna Sagar tail pond link canal]] is entirely located in [[Telangana]] region and needs to be routed through high lands which necessitate more pumping head.<ref>{{cite web|url= http://www.irrigation.telangana.gov.in/icad/projects |title= JYOTHI RAO PULE DUMMUGUDEM NAGARJUNA SAGAR SUJALA SRAVANTHI |accessdate=19 July 2015}}</ref> An alternative link canal to Nagarjuna Sagar tail pond from [[Polavaram Project|Polavaram dam]] is also economically feasible to transfer Godavari water. This link canal passes entirely through the coastal Andhra Pradesh region only.<br />
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==Joint projects with Karnataka==<br />
{{Main article|Tungabhadra Dam#Future potential}}<br />
The [[Rajolibanda Diversion Scheme|Rajolibanda barrage]] is not receiving adequate continuous flows due to excessive water utilization in its catchment area in Karnataka. The lower Tungabhadra basin badly needs water augmentation from the adjacent Krishna river. This is achieved with a 20&nbsp;km long tunnel from [[Narayanpur Dam|Narayanpur reservoir]] to the Maski nala reservoir / tank situated at 475 m MSL for drawing nearly 250 tmcft Krishna river water.<ref>{{cite web|url=http://india-wris.nrsc.gov.in/wrpinfo/index.php?title=Maskinala_D05465|title=Maskinala D05465|accessdate=15 August 2015}}{{Dead link|date=April 2020 |bot=InternetArchiveBot |fix-attempted=yes }}</ref> It would also provide additional water to bring more area under irrigation in uplands of Raichur & Mahboobnagar districts. Reliable Krishna river water can be supplied instead of unreliable Tungabhadra river water to the existing Tungabhadra Left bank canal in Raichur district, existing Tungabhadra right bank low level canal, the existing Rajolibanda left bank canal and the existing 150 years old [[K. C. Canal]]. Thus substantial [[Tungabhadra Dam|Tungabhadra reservoir]] water would be saved for utilization in upstream new projects and reliable Krishna river water supply is ensured to existing projects.<br />
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A new barrage (FRL 349 m MSL) across the Krishna river just downstream of [[Bhima river]] confluence point on the common border of Karnataka and Andhra Pradesh states (near {{Coord|16|24|25|N|77|17|21|E|type:landmark_region:IN-AP}}), can also be taken up to supply Krishna river water by lift irrigation to the westernmost parts of [[Mahbubnagar district]] and high lands lying east of Bhima river in Karnataka.<br />
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Ultimately, 500 tmcft water is to be transferred annually from the Godavari river to this pond for meeting various water needs in Andhra Pradesh. Thus Nagarjuna Sagar tail pond will play pivotal role to put to use the water from the Godavari River in all regions of the [[Andhra Pradesh]] state.<br />
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== See also ==<br />
* {{section link|Sileru River|Irrigation potential}}<br />
* [[Icchampally Project]]<br />
* [[Dummugudem Lift Irrigation Scheme]]<br />
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== References ==<br />
{{reflist}}<br />
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{{Coord|16|37|42|N|79|29|21|E|type:landmark_region:IN-AP|display=title}}<br />
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{{Krishna basin |state=expanded}}<br />
{{Krishna River dams}}<br />
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[[Category:Dams in Andhra Pradesh]]<br />
[[Category:Lift irrigation schemes]]<br />
[[Category:Irrigation in Andhra Pradesh]]<br />
[[Category:Krishna River]]<br />
[[Category:Buildings and structures in Krishna district]]<br />
[[Category:Pumped-storage hydroelectric power stations in India]]<br />
[[Category:2014 establishments in Andhra Pradesh]]<br />
[[Category:Infrastructure completed in 2014]]</div>AdolphMassola0