12 families have had their homes condemned and have been ordered to evacuate. The collapse is in Black Hawk, SD and only about 100 yards from I-90. Robert noted that it is amazing that it was not noticed when the Interstate was built.
Here is a video with some cavers being interviewed. You can see I-90 in the background. I don't know the vintage of the car that was inside the collapsed mine. https://www.youtube.com/watch?v=tEDQFbL6dA8 DirtDoc
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