Opal Gooden, 70, a former government writer and editor who later worked for the United Mineworkers, died Friday at Arlington Hospital. She had cancer and osteoporosis.

Miss Gooden was a native of Fort Worth, Tex., and a 1931 graduate of Texas Christian University. She began her government career as a writer with the Office of War Information in New York City during World War II.

She moved to Washington about 1950 and worked for the U.S. Information Agency and as an information specialist with the Labor Department's women's bureau. She joined the Mineworkers in the 1950s, working in their personnel department and as a publications editor. She retired in 1965.

Miss Gooden was a member of the Friends Meeting of Washington. She was its assistant clerk in 1962 to 1963 and also served on its finance and property committee. She was a founder of the music school at All Souls Unitarian Church in Washington and served on the board of the Ionia Whipper Home.

She was a member of the Washington Press and the American Newswomen's clubs.

Miss Gooden's survivors include a sister, Lillian Gooden Hobbs, and a brother, Jack Gooden, both of Fort Worth.