Series consists of aerial photographs of the City of Thunder Bay. Included are aerial views of the former City of Fort William from 1949, 1955, 1959, 1962, 1968 and 1969; aerial views of the former City of Port Arthur from 1959 and 1969; and aerial views of the amalgamated City of Thunder Bay from 1974, 1976, 1981, 1983, 1987, 1991 and 1996. Also included in this series are aerial photographs of the Port Arthur urban renewal area from 1968.