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| location_map_caption = | | location_map_caption = | ||
| coordinates = {{coord|16|05|13|N|78|53|50|E|type:landmark|display=inline,title}} | | coordinates = {{coord|16|05|13|N|78|53|50|E|type:landmark|display=inline,title}} | ||
| location = | | location = [[Sri Sailam]], [[Nandyal district]], [[Andhra Pradesh]], [[India]] [[Domalapenta]] , [[Nagarkurnool district]] , [[Telangana]] , [[India]] | ||
| construction_began = 1960 | | construction_began = 1960 | ||
| opening = 1981 | | opening = 1981 | ||
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| res_surface = {{Convert|616|km2|abbr=on}} | | res_surface = {{Convert|616|km2|abbr=on}} | ||
| res_max_depth = | | res_max_depth = | ||
| plant_operator = [[ | | plant_operator = [[APGENCO]](right bank) and [[TSGENCO]](left bank) | ||
| plant_commission = | | plant_commission = | ||
| plant_decommission = | | plant_decommission = | ||
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| website = | | website = | ||
| extra = | | extra = | ||
| image = | | image = NSRS Srisailam Dam.jpg | ||
| dam_height = {{Convert|145.10|m|ft|0|abbr=on}}<ref>{{cite web|title=India: National Register of Large Dams 2009|url=http://www.cwc.nic.in/main/downloads/National%20Register%20of%20Large%20Dams%202009.pdf|publisher=Central Water Commission|access-date=10 July 2011|url-status=dead|archive-url=https://web.archive.org/web/20110721165130/http://www.cwc.nic.in/main/downloads/National%20Register%20of%20Large%20Dams%202009.pdf|archive-date=21 July 2011}}</ref><ref>{{cite book|last=Jauhari|first=V.P.|title=Sustaining river linking|year=2005|publisher=Mittal Publications|location=New Delhi, India|isbn=817099991X|pages=84|url=https://books.google.com/books?id=G50T11X_hSgC&q=srisailam+dam&pg=PA84}}</ref> | | dam_height = {{Convert|145.10|m|ft|0|abbr=on}}<ref>{{cite web|title=India: National Register of Large Dams 2009|url=http://www.cwc.nic.in/main/downloads/National%20Register%20of%20Large%20Dams%202009.pdf|publisher=Central Water Commission|access-date=10 July 2011|url-status=dead|archive-url=https://web.archive.org/web/20110721165130/http://www.cwc.nic.in/main/downloads/National%20Register%20of%20Large%20Dams%202009.pdf|archive-date=21 July 2011}}</ref><ref>{{cite book|last=Jauhari|first=V.P.|title=Sustaining river linking|year=2005|publisher=Mittal Publications|location=New Delhi, India|isbn=817099991X|pages=84|url=https://books.google.com/books?id=G50T11X_hSgC&q=srisailam+dam&pg=PA84}}</ref> | ||
| location_map = India Andhra Pradesh | | location_map = India Andhra Pradesh | ||
}} | }} | ||
The '''Srisailam Dam''' is constructed across the [[Krishna River]] in [[Nagarkurnool | The '''Srisailam Dam''' is constructed across the [[Krishna River]] in [[Nagarkurnool district]] , [[Telangana]] and [[Nandyal district]], [[Andhra Pradesh]] near [[Srisailam]] temple town and is the [[List of power stations in India#Hydroelectric|2nd largest capacity]] working [[Hydroelectricity|hydroelectric]] station in the country.<ref>{{cite web|url= http://india-wris.nrsc.gov.in/wrpinfo/index.php?title=Srisailam(N.S.R.S.P)_Dam_D00557|title=Srisailam (N.S.R.S.P) Dam D00557|access-date=22 September 2015}}</ref> | ||
The dam was constructed in a deep gorge in the [[Nallamala Hills]] in between Kurnool and | The dam was constructed in a deep gorge in the [[Nallamala Hills]] in between Kurnool and Nagarkurnool districts, {{convert|300|m|ft|abbr=on}} above sea level. It is {{convert|512|m|ft|abbr=on}} long, {{convert|145|m}} maximum height and has {{nowrap|12 radial}} crest gates. It has a reservoir of {{convert|616|km2}}. Project has an estimated live capacity to hold 178.74 [[Tmcft]] at its full reservoir level of {{convert|885|ft|m|0}} [[Mean sea level|MSL]]. The minimum draw down level (MDDL) of the reservoir is at {{convert|705|ft|m|0}} MSL from its river sluice gates and corresponding dead storage is 3.42 Tmcft.<ref>{{cite web|url= http://krmb.cgg.gov.in/krmb/projects#|title=Neelam Sanjeeva Reddy Srisailam Project|access-date=22 September 2017}}</ref> The left bank underground power station houses {{nowrap|6 × }}{{convert|150|MW}} reversible [[Francis-pump turbine]]s for [[pumped-storage]] operation (each Turbine can pump 200 [[Cubic metre per second|cumecs]]) and the right bank semi under ground power station houses {{nowrap|7 × }}{{convert|110|MW}} Francis-turbine generators. | ||
Tail pond dam/weir located 14 km downstream of Srisailam dam is under advanced stage of construction to hold the water released by the hydro turbines and later pump back into the Srisailam reservoir by operating the turbines in pump mode.<ref>{{cite web|url= http://www.contec.co.in/project/single_whole_project/52|title=Srisailam Tail pond Dam|access-date=22 December 2015}}</ref> The weir portion got breached in November 2015 unable to withstand the normal water release from the hydro power stations.<ref>{{cite web|url= https://www.youtube.com/watch?v=vF7AdfW9XjI|title=Srisailam Tail pond Dam leaked|access-date=22 December 2015}}</ref> Tail pond weir was completed during the year 2017 and pumping mode operation is being done even the downstream [[Nagarjuna Sagar dam|Nagarjuna Sagar reservoir]] water level is below {{convert|531.5|ft|m|0}} MSL. The tail pond has nearly 1 tmcft live storage capacity.<ref>{{cite web|url= http://aperc.gov.in/aperc1/assets/uploads/files/OP72006.pdf|title= Srisailam dam tail pond level and storage capacity |access-date=22 September 2015}}</ref> | Tail pond dam/weir located 14 km downstream of Srisailam dam is under advanced stage of construction to hold the water released by the hydro turbines and later pump back into the Srisailam reservoir by operating the turbines in pump mode.<ref>{{cite web|url= http://www.contec.co.in/project/single_whole_project/52|title=Srisailam Tail pond Dam|access-date=22 December 2015}}</ref> The weir portion got breached in November 2015 unable to withstand the normal water release from the hydro power stations.<ref>{{cite web|url= https://www.youtube.com/watch?v=vF7AdfW9XjI |archive-url=https://web.archive.org/web/20160311030730/https://www.youtube.com/watch?v=vF7AdfW9XjI |archive-date=2016-03-11 |url-status=dead|title=Srisailam Tail pond Dam leaked|access-date=22 December 2015}}</ref> Tail pond weir was completed during the year 2017 and pumping mode operation is being done even the downstream [[Nagarjuna Sagar dam|Nagarjuna Sagar reservoir]] water level is below {{convert|531.5|ft|m|0}} MSL. The tail pond has nearly 1 tmcft live storage capacity.<ref>{{cite web|url= http://aperc.gov.in/aperc1/assets/uploads/files/OP72006.pdf|title= Srisailam dam tail pond level and storage capacity |access-date=22 September 2015}}</ref> | ||
== History == | == History == | ||
The Srisailam project began in 1960, Initially only as a power project. After several delays, the main dam was finally completed twenty years later in 1980 July 26. {{Citation needed|date=December 2009}} In the meantime the project was converted into a multipurpose facility with a generating capacity of {{convert|770|MW}} by its second stage which was completed in 1987. {{Citation needed|date=December 2009}} The dam is to provide water for an estimated {{Convert|2000|km2}}. Under the right bank branch canal {{Convert|790|km2}} in Kurnool and Kadapa districts will have assured irrigation. From the initial modest estimate of {{nowrap|{{Indian Rupee|link=Indian rupee}}384.7 million}} for a power project the total cost of the multipurpose project was estimated to cross {{nowrap|{{Indian Rupee}}10 billion}} in its enlarged form. The dam has alone cost {{nowrap|{{Indian Rupee}}4.04 billion}} together with the installation of four generating sets of {{nowrap|110 MW}} each. The right bank branch canal is estimated to cost {{nowrap|{{Indian Rupee}}4.49 billion}} and the initial investment of {{nowrap|{{Indian Rupee}}1.4 billion}} has been provided by the World Bank. The projected cost-benefit ratio of the project has been worked out at 1:1.91 at 10% interest on capital outlay.{{Citation needed|date=December 2009}}. In 1998 a coffer dam was over topped by flooding. The power house required repairs and did not generate power for a year. On 2 October 2009, Srisailam dam experienced a record inflow which threatened the dam.<ref>[http://www.indiawaterportal.org/node/12731 Managing historic flood in the Krishna river basin in the year 2009]</ref> | The Srisailam project began in 1960, Initially only as a power project. After several delays, the main dam was finally completed twenty years later in 1980 July 26. {{Citation needed|date=December 2009}} In the meantime the project was converted into a multipurpose facility with a generating capacity of {{convert|770|MW}} by its second stage which was completed in 1987. {{Citation needed|date=December 2009}} The dam is to provide water for an estimated {{Convert|2000|km2}}. Under the right bank branch canal {{Convert|790|km2}} in Kurnool and Kadapa districts will have assured irrigation. From the initial modest estimate of {{nowrap|{{Indian Rupee|link=Indian rupee}}384.7 million}} for a power project the total cost of the multipurpose project was estimated to cross {{nowrap|{{Indian Rupee}}10 billion}} in its enlarged form. The dam has alone cost {{nowrap|{{Indian Rupee}}4.04 billion}} together with the installation of four generating sets of {{nowrap|110 MW}} each. The right bank branch canal is estimated to cost {{nowrap|{{Indian Rupee}}4.49 billion}} and the initial investment of {{nowrap|{{Indian Rupee}}1.4 billion}} has been provided by the World Bank. The projected cost-benefit ratio of the project has been worked out at 1:1.91 at 10% interest on capital outlay.{{Citation needed|date=December 2009}}. In 1998 a coffer dam was over topped by flooding. The power house required repairs and did not generate power for a year. On 2 October 2009, Srisailam dam experienced a record inflow which threatened the dam.<ref>[http://www.indiawaterportal.org/node/12731 Managing historic flood in the Krishna river basin in the year 2009]</ref> | ||
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==Power generation optimization== | ==Power generation optimization== | ||
[[File:Power generator rooms.jpg|Srisailam right bank power house|thumb]] | |||
At present the initial inflows into [[Srisailam]] reservoir are stored excessively without using for power generation. The flood water fills the remaining empty Srisailam reservoir quickly and most of the flood water overflows into downstream [[Nagarjuna Sagar Dam|Nagarjunasagar]] reservoir without being used for power generation.<ref>[https://www.scribd.com/doc/58789365/Srisailam-HPS Optimisation of power generation from Srisailam Hydroelectric Power Station]</ref> The endeavor shall be to fill the Nagarjunasagar reservoir fully with the uniform water released through the power generating units. | At present the initial inflows into [[Srisailam]] reservoir are stored excessively without using for power generation. The flood water fills the remaining empty Srisailam reservoir quickly and most of the flood water overflows into downstream [[Nagarjuna Sagar Dam|Nagarjunasagar]] reservoir without being used for power generation.<ref>[https://www.scribd.com/doc/58789365/Srisailam-HPS Optimisation of power generation from Srisailam Hydroelectric Power Station]</ref> The endeavor shall be to fill the Nagarjunasagar reservoir fully with the uniform water released through the power generating units. | ||
== Pumped storage hydro power potential== | == Pumped storage hydro power potential== | ||
Srisailam reservoir, serving as lower level reservoir, has potential to install nearly 77,000 MW [[Power sector of Andhra Pradesh#Pumped storage hydroelectricity projects|high head pumped storage hydroelectric plants]] on its right side. | Srisailam reservoir, serving as lower level reservoir, has potential to install nearly 77,000 MW [[Power sector of Andhra Pradesh#Pumped storage hydroelectricity projects|high head pumped storage hydroelectric plants]] on its right side. | ||
==See also== | ==See also== | ||
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* [[List of hydroelectric power station failures]] | * [[List of hydroelectric power station failures]] | ||
* [[Nagarjuna Sagar tail pond]] | * [[Nagarjuna Sagar tail pond]] | ||
{{Commons category|Srisailam Dam}} | |||
==References== | ==References== | ||
{{reflist}} | {{reflist}} | ||
{{Krishna basin |state=expanded}} | {{Krishna basin |state=expanded}} | ||