Aaaaaaaaahh I see it. At Marengo, the line east is still used by CN, correct? It's still intact all the way through north of Bessemer (a town I know too well). I followed the right-of-way all the way west to Superior. It goes through the little hamlets of Sanborn, Delta, and up to Iron River, and back down to Winneboujou, Lake Nebagamon, near South Range, and into Allouez. But from there, I can't see it anywhere through Superior into Duluth. It must've paralleled right up against another line, or had trackage rights or something.
Any info on how the DSS&A actually got into Duluth would be helpful.
Ok it gets a bit complicated, the DSS&A's route east of the Allouez area varied depending upon era.
My information is from an official Soo Line Map dated 1981 as published in "The SOO" the magazine of the Soo Line Historical & Technical Society.
Between 1888 and 1892 the DSS&A had rights over the NP, they swung west off the NP and passed just south of the Omaha's Itasca Yard and then just north of GN's Ore Yard. Then they paralleled Grand Ave. on the north side. They swung west to cross the Wisconsin Central at 28th Street and their yard was a little bit further west. The line then continued west across Tower Ave. and swung north into the south end of the Union Depot, The DSS&A had a small yard and engine terminal a little further north across the LST&T and alongside the NP.
From 1892 the DSS&A came in from the south and used rights over the Omaha from Allouez to a point just after crossing the NP line from Hill Ave. Yard, where it curved towards 28th St.
After 1935 they again used the NP, but this time the NP was used all the way to the Omaha crossing near Hill Ave. Yard where a connecting track was built to get back on their own line. Also everything west of 28th St. was abandoned.
The DSS&A was an owner of the LST&T and I don't believe that had any facilities in Duluth.