SIOUX CITY, Iowa (AP) — A Sioux City manufacturing plant is closing and roughly forty jobs will be eliminated. The Sioux City Journal reports that Prince Hydraulics employees were told Friday that the Sioux City plant would close and the work will move to other locations. Shannon Stucker with the International Association of Machinists and Aerospace Workers said the union was surprised by the news. Most workers at the plant were represented by the union. Prince Manufacturing has other facilities in Hartington, Nebraska, Brookings, South Dakota, and Yankton, South Dakota.