Muscle Shoals Canal?

While looking at google maps I noticed what looked like the remanence of what I thought was the Muscle Shoals Canal:

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After reading up a little on the Muscle Shoals Canal and looking at maps it doesn't appear that the canal went this far west.

Map of the Muscle Soals Canal

What is the canal looking structure on google maps?

Keller Motors of Huntsville

I just ran across an interesting read about the Keller Motors Corporation of Huntsville. As it turns out only 3 Keller Cars remain and a 1947 Keller Car Recently made it's way back to Huntsville.