On Sunday, we drove across South Dakota to the town of White River, population 581. We found a Dollar General store, The Sweet Spot Motel which is brand new, with 8 rooms (we got room 107), no operating gas stations, and the Round Up Bar and Grill, a friendly place with cold beer and nice people.
During our drive we saw a feature on several barns that I haven't before. It looks like a large cupola, but it sits atop the barn like a cross wise dormer.
Later on I saw a barn with the structure on the roof and a feed auger run up to it. So, I assume it is set up to convey live stock feed loft:
Jim