bˈɑːlə lˈeɪk wʌzðə lˈɑːɹdʒɪst nˈætʃɚɹəl lˈeɪk ɪn wˈeɪlz ðˌoʊ ɪts lˈɛvəl hˈæzbiːn ˌɑːɹɾɪfˈɪʃəli kəntɹˈoʊld baɪ slˈuːsᵻz sˈɪns ɐbˌaʊt wˈʌn θˈaʊzənd ˈeɪthˈʌndɹɪd fˈoːɹ.
Bala Lake was the largest natural lake in Wales though its level has been artificially controlled by sluices since about 1804.