Chicago, Milwaukee, & St. Paul RY (aka The Milwaukee Road) CDS from August 16, 1899.
A couple of months ago my family toured the US visiting grandparents and one excursion took us to the Wisconsin Dells. In the Dells is a located a club that restores small steam engine locomotives and cars like you might find in a city park or zoo. The locomotive, tender and volunteers above belong to this club, the Riverside and Great Northern Railway.
The club's short stretch of tracks are laid on the original mainline of The Milwaukee Road, a former Grade I US railroad that ran from Chicago to the Pacific.