Few changes are expected to the Burlington Northern Santa Fe in South Dakota when investor Warren Buffet's deal to buy the railroad is final.

The railroad is the biggest hauler of grain and ethanol in South Dakota, owning about 900 miles of railroad track in the state.

The deal came as a surprise to Todd Yeaton, chairman of the South Dakota State Railroad Board and manager of a grain facility for the South Dakota Wheat Growers in Highmore.

Lisa Richardson, executive director of the South Dakota Corn Grower's Association, says it means five railroads move more than 90 percent of all the product in the nation. She says the lack of competition makes her nervous.