Pocahontas Coalfield, which is also known as the Flat Top-Pocahontas Coalfield, is located in Mercer County/McDowell County, West Virginia and Tazewell County, Virginia.[1] The earliest mining of coal in the coalfield was in Pocahontas, Virginia in 1883 [2] at Pocahontas Mine No. 1, now on the National Register of Historic Places.