ðə lˈeɪk sˈɜːvz æz ɐ ɹˈɛzɚvwˌɑːɹ fɔːɹ ˈʌstə kɹˈæftvɜːk, ɐ hˌaɪdɹoʊɪlˈɛktɹɪk plˈænt wˌɪtʃ wʌz pˌʊt ˌɪntʊ ˌɑːpɚɹˈeɪʃən ɪn nˈaɪntiːnhˈʌndɹɪd sˈɪksti fˈaɪv.
The lake serves as a reservoir for  Usta kraftverk, a hydroelectric plant which was put into operation in 1965.