As his success grew, Stephenson was hired to build an 8-mile (13-km) railway from Hetton colliery to Sunderland in 1820. The finished result sued a combination of gravity on downward inclines and locomotives for level and upward stretches.
As his success grew, Stephenson was hired to build an 8-mile (13-km) railway from Hetton colliery to Sunderland in 1820. The finished result sued a combination of gravity on downward inclines and locomotives for level and upward stretches.