Madatsar ruwan Bui (da Turanci Bui Dam) shine aikin samar da lantarki mai karfin megawatt 400 (540,000 hp) a Ghana. An gina shi a kan kogin Black Volta a Bui Gorge, a ƙarshen Bui National Park. Aikin hadin gwiwa ne tsakanin gwamnatin Ghana da Sino Hydro, wani kamfanin gine-gine na kasar Sin. An fara gina babbar madatsar a cikin watan Disambar 2009. An ƙaddamar da janareta na farko a ranar 3 ga Mayu 2013, kuma an ƙaddamar da madatsar a watan Disamba na wannan shekarar. Bui zai kasance na biyu mafi girman masana'antar samar da wutar lantarki a kasar bayan Akosombo Dam. Gidan ruwan ya cika kusan kashi 20% na Bui National Park kuma ya shafi mazaunan ƙanƙanin baƙin ciki da kuma yawancin namun daji. Ya buƙaci sake tsugunar da mutane 1,216, kuma ya shafi wasu da yawa. Masanin masarautar Biritaniya da Ostiraliya kuma masanin kimiyyar halittu Albert Ernest Kitson ya fara tunanin dam din Bui hydro-electric a shekarar 1925 lokacin da ya ziyarci Bui Gorge. Dam din ya kasance a jikin zane tun daga shekarun 1960, lokacin da aka gina babbar madatsar ruwa ta Ghana, Akosombo Dam a gaba da kogin Volta.