JayL............i'm not trying to diminish what you are pointing out but when i was a teen i had relatives living in Lackawana NY , when we went to check out Lake Erie it was like the picture in the link you put up , to enjoy a day of lake swimming i remember we went to Ontario which unlike Erie wasn't black and on fire in places , however here we are decades later catching beautiful steelhead out of a lake that when i was young was litterally black and stunk , nature and time can accomplish wonderful things , not always but Erie is a prime example.