Caption: CN L566 with 4705 and 7025 wait patiently for a Siemens Canada worker to clear the sensors on the ION high and wide detector at Roger Street in Waterloo. Prior to L566’s arrival, an early evening snowfall had coated the area in a fresh blanket of white. Once the sensors were cleared by the worker, L566 was able to proceed north on the Waterloo Spur to the chemical companies in Elmira.