What was the blue water line? All I know is that it was a railroad.?

Question

It is the subject of a folk song, but I also don't know who wrote it or who originally sang it.

Answer 1

Blue Water is a passenger train service operated by Amtrak as part of its Michigan Services. The 319-mile (513 km) line connects Port Huron, Michigan and Chicago, Illinois.

It was sung by the Brothers Four

http://en.wikipedia.org/wiki/Niles_(Amtrak_station)

Answer 2

try wikipedia.org