William R. (Bob) Balderson, 50, a former Washington resident who was chief of police for the town of Damascus, Va., for 10 years, died July 9 in a Bristol, Tenn., hospital.

His death resulted from injuries he received in a car accident on July 6. According to Virginia State Police, Mr. Balderson lost control of his car on Interstate Rte. 81 near Bristol, struck a guardrail and turned over.

Mr. Balderson was a native of Washington and lived here for nearly 30 years.He worked here for the Continental Bread Company, and served with the Marines in China and the Pacific during World War II. He later joined the Bristol, Va., police department.

He also served with the Abingdon, Va., police, and then became chief of the Damascus police. He served in that post from 1968 until 1978, when he retired for reasons of health.

Survivors include his wife, Drue, of the home in Abingdon; a daughter, Catherine B. Poindexter, and two sons, Robert P. and Patrick L., all of Manassas; a stepdaughter, Sheila Fenner, of Mountain City, Tenn.; his mother, Mary C. Reed, and stepfather, Dr. Charles E. Reed, of Silver Spring; a sister, Marie Garber, of North Huntingdown, Pa.; a half brother, Steven Balderson, of Takoma Park; a half sister, Linda Merchant, of New Carrollton, and two grandchildren.