Which construction company built the largest airport in the Upper Midwest region of Minnesota, Iowa, Nebraska, North Dakota, South Dakota, and Wisconsin?
Minneapolis–St. Paul Airport Trams:  Both were constructed by the Poma-Otis Transit Company of Farmington, Connecticut and are operated under the direction of the Metropolitan Airports Commission. Minneapolis–Saint Paul International Airport:  Located in a portion of Hennepin County, Minnesota, United States, outside of any city or school district, within 10 miles (16 km) of both downtown Minneapolis and downtown Saint Paul, it is the largest and busiest airport in the six-state Upper Midwest region of Minnesota, Iowa, Nebraska, North Dakota, South Dakota, and Wisconsin.
Poma-Otis Transit Company of Farmington, Connecticut