ɑːswˈiːɡoʊ lˈeɪk, ɪnðə mˈɪdəl ʌv lˈeɪk ɑːswˈiːɡoʊ, ˈɔːɹɪɡən ɐ pˈoːɹtlənd sˈʌbɜːb, wʌz ɐn ɐbˈændənd tʃˈænəl ʌvðə tˈuːɐlˌætɪn ɹˈɪvɚ ðæt wʌz skˈaʊɚd baɪ ɐ kˈɑːlk.
Oswego Lake, in the middle of Lake Oswego, Oregon (a Portland suburb), was an abandoned channel of the Tualatin River that was scoured by a kolk.