History Learner
Banned
Big Stone Gap, Virginia, might have been a regional industrial city based on steel manufacture and probably turned the "Tri-Cities" area in northeastern Tennessee/southwestern Virginia into the "Quad-Cities". Supposedly it would become the Pittsburgh of the South according to the group which had planned it, but realistically going by the terrain and regional prospects, I think growing to be the size of Kingsport or Johnson City (50-60K) in Tennessee might have been more likely.
Averting the Civil War or a quicker ending to it (Either Confederate victory or faster Union, it matters not) would be sufficient to do this, or removing Alexander Arthur somehow. Such would've left enough capital to keep up the investments into the town, which IOTL did manage to get iron furnaces from places like St. Louis; this mark lasts to this day with communities like Furnace. Such might have prevented Middlesboro over in Kentucky, as both seem to have fought for much of the same funding. Once BSG gets going, it might also hurt Kingsport as Eastman Kodak was allegedly looking at other sites, and an already developing Big Stone with good rail connections may prove more attractive. I agree it isn't likely that it would become a Pittsburgh as was extolled, but a city of 50-80,000* with a strong industrial basis certainly seems possible. Such would've also kept the nearby coal towns relevant and large, first as sources of coal for iron/steel production, and then as suburbs as the town became a city. Add in UVA deciding to locate their affiliate campus here instead of Wise, and you'd definitely have the Virginian version of Johnson City, but with the industry of Kingsport thrown in.
*Metro very easily could be over 100,000 like Kingsport and Johnson City. There's also the chance that if a CSA victory occurs, the Confederacy could seek to really develop it to increase their industrial capacity. At that point, all bets are off about population size.