New sewer tunnel offers brief geologic history of Louisville https://t.co/qMVCFJycww via @myplainview https://t.co/dkz85gS3n8

New sewer tunnel offers brief geologic history of Louisville https://t.co/qMVCFJycww via @myplainview pic.twitter.com/dkz85gS3n8

— Flush This (@flushthis) August 21, 2018

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