The railway industry was also a major employer during the industrial revolution, with railways being built throughout the county, such as The Tanfield Railway, The Clarence Railway and The Stockton and Darlington Railway. The growth of this industry occurred alongside the coal industry, as the railways provided a fast, efficient means to move coal from the mines to the ports and provided the fuel for the locomotives. The great railway pioneers Timothy Hackworth, Edward Pease, George Stephenson and Robert Stephenson were all actively involved with developing the railways in tandem with County Durham's coal mining industry. Shildon and Darlington became thriving 'railway towns' and experienced significant growths in population and prosperity; before the railways, just over 100 people lived in Shildon but, by the 1890s, the town was home to around 8,000 people, with Shildon Shops employing almost 3000 people at its height.