Tashar wutar lantarki wacce duk ko galibin ruwan da ake samar da shi ya ta'allaka ne da tsarin kiyaye ruwa akan kogin.

Tashoshin wutar lantarki irin na madatsar ruwa sun fi mayar da hankali ne ga tashoshin samar da wutar lantarki da ke gina gine-ginen ruwa a kogin don samar da tafki, mai da hankali kan ruwa don daukaka ruwan, da kuma amfani da bambancin kai wajen samar da wutar lantarki. Babban abin lura shi ne cewa madatsar ruwa da tashar samar da wutar lantarki sun taru ne a cikin gajeren sashin kogi guda.
Tashoshin wutar lantarki irin na madatsar ruwa gabaɗaya sun haɗa da gine-ginen riƙon ruwa, tsarin fitar da ruwa, bututun matsa lamba, tashoshin wutar lantarki, injin turbines, janareta da kayan taimako. Galibin tashoshin samar da wutar lantarki da madatsun ruwa a matsayin gine-ginen da ke rike da ruwa su ne tashoshin samar da wutar lantarki masu matsakaicin tsayi, kuma galibin tashoshin samar da wutar lantarki masu kofofi a matsayin gine-ginen da ke rike da ruwa a matsayin kananan tashoshin samar da wutar lantarki. Lokacin da kan ruwa ba shi da tsayi kuma kogin yana da fadi, ana amfani da wutar lantarki a matsayin wani ɓangare na tsarin kiyaye ruwa. Irin wannan tashar wutar lantarki kuma ana kiranta tashar wutar lantarki ta kogi, wacce kuma tashar wutar lantarki ce irin ta dam.
Dangane da matsayin dam da kuma tashar samar da wutar lantarki, ana iya raba tashoshin wutar lantarki irin na madatsar gida biyu: nau'in madatsar ruwa da kuma gadon kogi. An shirya tashar samar da wutar lantarki irin ta dam a gefen dam din, kuma ana karkatar da ruwa ta bututun matsa lamba don samar da wutar lantarki. Ita kanta shuka ba ta ɗaukar matsa lamba na sama. Gidan wutar lantarki, madatsar ruwa, magudanar ruwa da sauran gine-gine na tashar samar da wutar lantarki a kogi duk an gina su ne a gabar kogin. Sun kasance wani ɓangare na tsarin riƙon ruwa kuma suna ɗaukar matsa lamba na sama. Irin wannan tsari yana da kyau don ceton jimillar zuba jari na aikin.

Dam din tashar wutar lantarki ta bayan madatsar ruwa yawanci yana da tsayi. Na farko, ana amfani da babban kai don ƙara ƙarfin shigar da tashar wutar lantarki, wanda zai iya dacewa da daidaitattun ƙa'idodin ƙa'idodin tsarin wutar lantarki; na biyu, akwai babban ƙarfin tafki don daidaita kololuwar ruwa don rage matsi na shawo kan ambaliyar kogin da ke ƙasa; na uku, cikakkun fa'idodin sun fi mahimmanci. Rashin lahani shi ne yadda asarar da aka yi a cikin tafki ya karu da kuma sake tsugunar da mazauna birane da kauyuka yana da wahala. Don haka, tashoshin samar da wutar lantarki na dam da ke da manyan madatsun ruwa da manyan tafki, galibi ana gina su ne a cikin tsaunuka masu tsayi, wuraren da ke da kwararar ruwa mai yawa da kuma ambaliyar ruwa.
Galibin manyan tashoshin wutar lantarki da aka gina a duniya sun taru ne a kasata. Na farko shi ne tashar wutar lantarki ta Gorge Uku, tare da karfin da aka yi amfani da shi na kilowatt miliyan 22.5. Baya ga dimbin alfanun da ake samu na samar da wutar lantarki, tashar samar da wutar lantarki ta uku Gorges tana kuma da fa'ida sosai wajen tabbatar da shawo kan ambaliyar ruwa a tsakiya da kasa na kogin Yangtze, da inganta zirga-zirgar zirga-zirga da amfani da albarkatun ruwa, kuma ana kiranta da "manyan kayan aikin kasar."