Complex sentence: The Norfolk and Western Railway, since 1883, had been bringing in coal from a new coal mine, the Pocahontas Coalfield which could provide coal more cheaply and ship the coal on a larger standard gauge, class one railroad.
Split into simpler sentences: The Norfolk and Western Railway, since 1883, had been bringing in coal from a new coal mine. The Pocahontas Coalfield which could provide coal more cheaply and ship the coal on a larger standard gauge, class one railroad.