Impact of Technological Change and Productivity on the Coal Market

Table 5. Longwall Mine Production Compared with Total Underground Production

Year	Longwall Production (Million Short Tons)	Total Underground Production (Million Short Tons)	Longwall Share of Underground Production (Percent)
1983	79.6	298.3	26.7
1993	109.7	350.4	31.3
1997	194.8	420.7	46.3
Note: Production from longwall mines includes production from both longwall units and continuous miners operating at the same mine. Sources: Energy Information Administration, Longwall Mining, DOE/EIA-0588 (Washington, DC, March 1995), Table 14; and Energy Information Administration, Coal Industry Annual 1997, DOE/EIA-0548(97) (Washington, DC, December 1998), Table 5.