The coming of the railways enabled the locally mined coal to be sent across the country. Demand soon outstripped supply and many more shafts were sunk to reach the coal seams under the town. In 1871 Dom Pedro, the Emperor of Brazil, visited Normanton with his Empress and gave his name (in a slightly altered form) to the Don Pedro Colliery at Hopetown. Today roads in the area of the former colliery retain the name. At their peak the collieries employed over 10,000 men, most of whom wanted to move themselves and their families to Normanton. The town enjoyed a boom period with more mines opening and more shafts being sunk in order to meet the increasing demand for coal until, by the mid-1970s, most coal seams in the Normanton area were worked-out.