Ancient Native American canal discovered in Gulf Shores, Alabama

Ancient Native American canal discovered in Gulf Shores. Not for irrigation. It's likely a highway for ferrying goods, but what the hell do I know? 

 The canal, dug in 600 A.D., once ran south from Oyster Bay to the northern shore of Little Lagoon in Gulf Shores. It would have served as a sort of prehistoric super highway, facilitating travel by dugout canoe from Mobile Bay to the Gulf of Mexico.