Levi Strauss Co. will open its 32nd plant in the United States early next year with the addition of a 30,000-square-foot unit at Bossier City, La. The plant will employ 200 persons, said Wayne Dodson of Amarillo, division production manager The company is nearing com pletion of new plants in Lubbock and Midland-Odessa as well as of modern new plants to replace older facilities in Wichita Falls, San Angelo and Tyler and Murphy, N. C.