In September 1963, around1,740 freshmen and sophomores arrived at a brand-new Catholic high school on Sproul Road in Marple Township.
Four years later, there were 3,940 of them.
For more than six decades, Cardinal O’Hara High School has sent generations of Delaware County students through its classrooms and onto the athletic fields of its 35-acre campus. But the school that opened in 1963 was built for a very different Delco…