Yeah Tom, I think the TC&W just clips the corner of Eden Prairie. Yes it is the TC&W that hosts 261 these days, as Amtrak has really cramped their style.
I think the bridge you're referring to is still there and operational. The Dan Patch Bridge goes over the Minnesota River, and was part of the MN&S. The CP now own the MN&S tracks, but has spun off some of the operations to Progressive Rail. The bridge would have been closed by the CP, but the TC&W bought it. Wikipedia That's about 5 miles SE from Eden Prairie, but I'm not sure what the access is like. Very low activity there. That bridge may also be closed right now because of high water on the Minnesota.
If you want something a little more up to date than 1954 in terms of a railway atlas, try this.
