Fred Dryden operates an excavator for the heavy division of Barletta Cos.' reconstruction of the 97-year-old Larz Anderson Bridge near Harvard Square in Cambridge, Mass. At 60, there is a good chance he's older than some of Boston's infrastructure. As an operating engineer, he has managed to avoid many of the physical hazards to which other construction crafts are prone and plans to stay on the job until age 65.
"I like my work because I'm always doing something different," he says with a smile. "I've got wheels, so I can go everywhere."