Charles S. Blumenthal, 80, a retired civil engineer who represented Prince George's County in the Maryland House of Delegates from 1971 to 1983, died Sept. 7 at his home in Oxon Hill. He had congestive heart failure.

Del. Blumenthal was the husband of Del. Rosa Lee Walters Blumenthal, who died in 1995. Both were Democrats.

In the Maryland House, he contributed to the enactment of legislation for veterans, the Equal Rights Amendment, rent control, clean water, property tax reform, access to public information and worker's compensation. He also served on the Appropriations Committee.

Press reports described him as a "flamboyant champion of lonely causes" known for "impassioned" and "loquacious" speeches.

In his unsuccessful bid for the U.S. House of Representatives in 1976, he made a parachute jump to recall his hale days as a World War II paratrooper.

He said that at $4 a jump, it was a cheap way to campaign. "I don't want to spent $150,000 for a $40,000-a-year job," he said.

He lost reelection to the House of Delegates in 1982.

Charles Stanley Blumenthal was a New York native and a civil engineering graduate of the Massachusetts Institute of Technology.

During World War II, he was an Army paratrooper and participated in the Battle of the Bulge. His decorations included the Bronze Star and the Purple Heart.

After doing engineering work in Detroit, he settled in the Washington area in 1955. He worked until 1968 for John McShain Construction, where he became a construction supervisor on several major projects, including the new State Department building and the Kennedy Center.

He also became active in Prince George's Democratic politics and civic affairs. He ran unsuccessfully for the state Senate in 1966.

He was a member of the American Legion and Veterans of Foreign Wars. In 1981, he was a recipient of the Veteran of the Year Award from the Joint Veterans Committee of Maryland.

His interests included baseball, classical music and crossword puzzles.

Survivors include four children, Rosemary Fernandez of Chicago, Martha Anne Williamson of White Plains, Beatrice Cheryl Anderson of Oxon Hill and George M. Blumenthal of Dunkirk, Md.; 12 grandchildren; 18 great-grandchildren; and four great-great-grandchildren.

Del. Charles S. Blumenthal served for 12 years.