In spite of the repair to the dyke, another breach occurred in 1721, which produced more kolks between 15 and 18 m deep.
ɪn spˈaɪt ʌvðə ɹᵻpˈɛɹ tə ðə dˈaɪk, ɐnˈʌðɚ bɹˈiːtʃ əkˈɜːd ɪn wˈʌn θˈaʊzənd sˈɛvənhˈʌndɹɪd twˈɛnti wˈʌn, wˌɪtʃ pɹədˈuːst mˈoːɹ kˈɑːlks bᵻtwˌiːn fˈɪftiːn ænd ˈeɪtiːn ˈɛm dˈiːp.