I am not aware of hogweed here in NKY. But let me confirm with others and i will be back in touch.
here's more information from our weed specialists from UK:
To my knowledge Giant Hogweed is not present in KY. Most reports of this plant come from the NE region of the US such as Pennsylvania and New York.
JD Green, PhD
Extension Professor (Weed Scientist)
Plant & Soil Sciences Department
413 Plant Science Building
Lexington, KY 40546-0312