Dale Miller, 54, had worked at the plant for less than six months. LONGVIEW, Wash. — The family of Dale Miller has confirmed the 54-year-old Portland man was killed in Tuesday’s blast at the Nippon Dynawave Packaging Company in Longview, Washington. Miller, a millwright who had only begun working at the plant earlier this year, left behind three children and three grandchildren. His sister, Sarah Barton, remembered him as a devoted family man who had recently moved in with their mother in Portland to help care for her. “He lived a great life,” Sarah Barton said. Beyond his work, Miller…