"A little BAM" was opened in 1940, the rail-tracks connected Tinda and Skovorodino.
But the beginning of the Second World War stopped the building because all the people-builders were sent to the front. In 1942 the ready construction (part Skovorodino-Tinda) was quickly stripped (or dismantled) and the rail-tracks were sent to Stalingrad
This has nothing to do with Komsomolsk.
The Skovorodino-Tinda line runs N/NW starting from roughly the "top" of manchuria. Indeed, it could also be put on the map, but would have vey little game impact, as it leads to nowhere. And it was also deconstructed during the war.
I don't think so.
Looking at map in post #131, we see that this stub is the start of a northward going railway that got completed by august 1945, and it was at about two thirds of the way from Harbin to the Lake. Its position on map in post #130 show it is properly placed imo.
Atually, there are 2 separate railroads. There was a railroad running into the swamp just west of the border, almost to lake Khanka. It isn't on the military map, but is in the maps in posts 127 and in the wikipedia map. The railroad you mention is also a consideration. As you say, it was extended during the war, and it seems it was a pretty well established transport corridor.
Here is a map with some possible adjustments, I'm not saying they should all go in, (especially the grey parts).
-Korea looses a hex to Manchuria
-railroad rerouted in NW Korea
-link from Korea border and nortwards. The parts I believe were constructed during the war (based on the maps above) are in grey, not black. Maybe they could be roads??!
-Link near the boarder to lake Kanka (there are coalfields there)
-link we forgot south of Changchun
-the railroad in the west near Nomonohan is way to short? (again, road near the end?).
-In the bottom west corner, I've dotted some rail in red. I can't see this rail in any of the maps posted in this thread! I know you have it in your war atlas, but all the other maps indicate it's not there? It's a fairly critical raillink, as without it, a single PART/invading unit can cut Manchria and China apart
-I've drawn in where I believe the Komsomolsk rail would start








