Huge archive of Chesapeake & Ohio photos, with a good search feature. Most all the extant steam locomotives can be found, in actual service. Here's streamlined 4-6-4 490 passing through the yard at Russell, Kentucky, with a passenger train:

http://www.chessieshop.com/gallery/show ... l?id=39993

The photos are small, but the organization sells 8x10s as a fundraising device if you want larger photos.

Also, the former Pere Marquette roundhouse at Saginaw, Michigan, last I knew it was still in use by the Bluewater Michigan Chapter, NRHS for passenger car work.

http://www.chessieshop.com/gallery/show ... l?id=40974