Be aware that parts of the Silverton Railroad around Ironton are under present day US 550. Other parts of the line coming north from Red Mountain are parts of current county roads or jeep roads. I'm not aware of any mining activity in the area. There is private property but many of the privately owned mining claims were purchased as part of The Red Mountain Project and are now in public ownership. Portions of the maps in this group show where the line was around Ironton and on to the Albany mill--I think this could be applied to a topo map:
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