Two bridges over the Delaware. Two jumpers. A late middle-aged man from Philadelphia, a senior citizen from Levittown. One lived, one died. It was Feb. 28, slack tide on a cold, cloudy Sunday. The first came at sunrise, about 6:30 a.m., at the Tacony-Palmyra. The second, three hours later at the Burlington-Bristol. “There is no family relation and no family connection that we could discern between the two,” said Patrick Reilly, director of public safety for the Burlington County Bridge Commission that owns and operates both spans. The bridge commission, which also has the Riverside-Delanco and some minor inland spans in Burlington County, is too familiar with such tragedies on the river.