Old Hillsborough County High School ,Tampa FL The Old Hillsborough County High School\u27, which later became Thomas Jefferson Junior High School, is a historic school building now known as the D.W. Waters Career Center in Tampa, Florida, United States. It is located at 2704 North Highland Avenue. On May 15, 2007, it was added to the U.S. National Register of Historic Places, NRIS #07000423. Built in the city\u27s Tampa Heights neighborhood in 1911 at a cost of $60,000, the old Hillsborough County High School building served what was then the county\u27s only high school. Architect William Potter designed the three story masonry block building as a closed rectangle with an open center. Today the historic building continues its educational u...