Table 10.-Number and production of bituminous coal and lignite mines, by State, size of output, and type of mining-Continued

State

of mines

Number Quan- Number Quan- Number Quan- Number Quan- Number Quantity of mines tity of mines tity of mines tity of mines

tity

Number Quanof mines tity

Total 1

Data may not add to totals shown because of independent rounding.

Table 11.-Underground mine data for bituminous coal and lignite mines, by State

I Data may not add to totals shown because of independent rounding.

Table 12.-Haulage units in use in bituminous coal and lignite underground mines, by State