CHAMPION <CHA> TO EXPAND ALBERTA MILL Champion International Corp, based in Stamford, Conn., said it will expand its mill in Hinton, Alberta, at a cost of about 285 mln Canadian dlrs. The expansion will double the facility's pulping operation to 424,000 short tons per year. The mill produces softwood kraft pulp which is sold to other Champion facilities and on the open market. Champion said it estimates the project will be completed by the end of 1989.