Sierra Pacific Industries is planning to add a new cutting and stud mill to replace its existing sawmill facilities, making it when finished one of the largest in the U.S. with yearly production capacity of 650 million board feet, according to the company.    The company's existing capacity is over 350 million board feet. Officials expect the new facility to continue to employ around 300 Eugene site workers and to support other indirect jobs.    “Sierra Pacific is energized about this opportunity to continue to provide quality, renewable wood productsto meet the ...