Mason Carter Prichard, 82, a retired colonel in the Army Reserve who was a civilian engineer with the Corps of Engineers for 28 years before retiring in 1954, died of congestive heart failure Friday at Bethesda Naval Hospital. A resident of the Washington area since the 1940s, he lived in Bethesda.

After leaving the government, he became executive vice president of the Foundation Company, an international engineering and construction firm based in New York City. He was a vice president of Oman Construction Company of Nashville at the time of his death.

Col. Prichard was a native of Mobile, Ala., and a 1923 graduate of the University of Alabama. He was on active duty during World War II, serving as the head of a construction unit in the Pacific and in this country. His decorations included the Legion of Merit.

He was elected to the board of the American Society of Civil Engineers in 1955 and was a past-president of the Washington Society of Civil Engineers. He was a member of the Cosmos Club.

Survivors include his wife, Ann Martin Prichard of Bethesda; two daughters, Jean Carter Prichard Fisher, also of Bethesda, and Ann Carter Prichard Pace of Richmond; eight grandchildren and two great-grandchildren.