Questions about a coal dealer

[Puddlejumper]

I am continuing my research and have identified no less than 12 grades of Anthracite, 6 Bituminous, Coke, salt, gravel, sand, and firewood as products stocked by coal dealers in the nation's capital. This dealer is going to meet my needs perfectly. One question, how would these dealers receive firewood in quantity? Would it have been hauled in by gondola or hopper? Hand loaded/unloaded and stacked or bottom dumped from hoppers into a pile like all the other aggregates being hauled in?

Thanks!
dave