Doesn't sound to me that all of Ohio's lakes are manmade. According to this: "Ohio boasts more than 60,000 lakes, ponds, and reservoirs. Almost all of these are manmade. The manmade lakes cover about 200,000 acres of water. About 6,700 acres of water make up natural bodies of water."

http://www.gcpl.lib.oh.us/nautical_facts.asp#Ohio

People who are mendacious for the sake of a pithy comment, whether true or not, irritate me.