Workers use heavy equipment to repair tracks and lift tanker cars a day after a crude oil train derailment in Watertown. Some 13 cars of a 110-car Canadian Pacific train derailed. One car was punctured and leaked hundreds of gallons of Bakken crude oil forcing the evacuation of about 35 nearby homes, according to the Canadian Pacific. The issue of very long trains filled with explosive crude oil has emerged as a safety concern for residents who live in bigger cities.