Processing Plant/Factory in Minnesota?

[kevdog]

A few years ago I rode out to Sturgis from Boston, taking Route 90. I remember stopping in the middle of farmland in Minnesota at a service station just off 90 and there was a huge processing plant or factory just down the road from it, clearly visible from the service station. I always wondered what that plant did. It was just something to see after riding through farmland for so long and not seeing much else.

[harleyhinzy]

Possibly an ethanol plant. They seem to be everywhere.

[stvmike]

then it was a ethanol plant.
We have one 20 miles down the road.