Ride the Ducks began looking to move its operation to the Schuylkill this summer after one of its boats collided with a tugboat, killing two tourists, on the heavily trafficked Delaware River, where the company had operated since 2002. While the causes of that July 7 accident are still under investigation by the National Transportation Safety Board, and several lawsuits are pending, the Ducks operator now sees the Schuylkill as a safer, less-congested option.