Wendell Depot has the Pan Am Railroad (Old Boston and Maine Railroad) - now CSX - going through it. At this location, there is a train detecor that gives out information on the train, as it passes by. It transmits at 161.160 mHz. The crossing itself is CPF 369.13.
If you are now looking for the cache, you will be looking at the crossing from a distance of about 600 feet North of the crossing. This is a nice area as you will notice the beauty of the river below and roads above and around you. People fish here and it seems to be a rest spot for commuters. Bring your own pen.