While looking up Sanborn maps of Springfield, I noticed that the 1910 Sanborn key map shows St Louis Iron Mountain and Southern (Missouri Pacific) tracks extending northeast from the MP/Frisco crossing at Phelps Ave. to the edge of the map. Detail map #55 shows some industrial switching trackage in this area. The StLIM&S track between Prospect and Rogers is designated "main line": I'm aware that there's been some discussion on this forum of Frisco and MoPac switching operations in this area, as in this thread. SPV's railroad atlas shows only a short stub of MP track northeast of the Frisco crossing, which seems consistent with the discussion of the Pine Street switching area linked above. But I'm curious. The 1910 Sanborn key map suggests that StLIM&S/MP track extended beyond Rogers street. I have a vague recollection of seeing an MP system map which showed a proposed line extending from Springfield north to Sedalia, Mo. Does anyone on the forum know how far StLIM&S/MP track extended beyond the Pine Street area, and whether this was part of a proposed extension to Sedalia?