Well, I for one had not seen this before, so I'm glad to learn about it.
Hours? It could take weeks to really dig through just the railroads and geographic locations of interest to see if there are any useful modeling photos, and that's in addition to just enjoying all the "railroadiness" of collections like this.
I do wish they had some way to label the photos. I didn't find any that could identify even the location and year. Sometimes from the facilities, cars, steam locomotives, or structures, you can take a guess at "1930s" or "1950s", but mostly, it is very hard to tell what you are looking at or where it is.
