Most of the pre-1900 growth in coal output occurred in the Connellsville district.

UMMC plans to increase coal output to 50,600,000 tons by the year 2016.

Its estimated coal output was forecast at 7 million tonnes in the fourth quarter of 2008.

The coal output reached its apogee at that time.

Total coal output in Britain had been falling since 1914.

The two-day rail strike was responsible for a steep drop in coal output.

Poland's financial problems were reduced by increased coal output and increased electricity sales to other East European countries.

So the strike, which has reduced total coal output by less than a third, will reduce all energy supplies by only 6%.

By 1840, hard coal output had passed the million-short ton mark, and then quadrupled by 1850.

Nearly 90 per cent of coal output in the country is extracted in this province.