æt ðə tˈaɪm, blˈæk kˈæzəm wʌz slˈeɪɾᵻd təbi kwˈɔːɹid, æz ɐn ˈoʊpən pˈɪt mˈaɪn, fɚðə ɡɹˈævəl ðætðə bˈɛdɹɑːk wʊd pɹəvˈaɪd.
At the time, Black Chasm was slated to be quarried, as an open pit mine, for the gravel that the bedrock would provide.