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Originally Posted by Chi-Sky21
Just saw some pictures online of the old Harrison Park quarry. I had no idea there was a quarry there, looks like it was really deep. Anyone know more about it? pics? what did they fill that with?
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I've never seen pictures, but IIRC the quarry was tapped out by its owners and then they began to accept waste dumping, including organic waste - it didn't smell great! I believe some of the upper layers are relatively clean clay from the digging of the Red and Blue Line subway tunnels.
By the time the city bought it for park expansion in the early 50s, it was almost full and it was capped with topsoil. It continued to sink slowly for the next few decades, there was even an explosion caused by methane buildup.