Whitney Ashbridge, 75, who retired in 1968 after serving 10 years as assistant administrator for construction at the Veterans Administration, died Aug. 2 at a hospital in Ogdensburg, N.Y., after a heart attack.

A former resident of Chevy Chase, he had lived in Belen, N.M., since August 1979. He was visiting a son, John Paulding Ashbridge, in Heuvelton, N.Y., when he was stricken.

Mr. Ashbridge was born in Philadelphia. He earned a degree in civil engineering from the Massachusetts Institute of Technology.

During the 1930s, he worked in Virginia with the Civilian Conservation Corps. During World War II, he served with the U.S. Army, first as post commander of the Manhattan atomic project in Los Alamos, N.M. and then in the Philippines. He was discharged with the rank of colonel after the war.

Mr. Ashbridge went to Caracas, Venezuela, in 1947 to head an office there for the Frederic Snare Corp., a civil engineering firm. He remained there until joining the VA here in 1958.

He was a former member of the vestry of All Saints Episcopal Church in Chevy Chase. He belonged to the Chevy Chase Club, the Army and Navy Club and a member of patriotic societies, including the Sons of the Revolution, the War of 1812 and the Founders and Partriots of America.

In addition to his son, John Paulding Asbridge, survivors include his wife, the former Mary Gurney Naile of Belen; another son, Richard Downing Ashbridge of Potomac; a daughter, Ann Maria Swanson of Veguita, N.M., and six grandchildren.