He was responsible for choosing the route of the railway and designing many of today's iconic structures including Box Tunnel, Royal Albert Bridge, Maidenhead Railway Bridge, Paddington and Bristol Temple Meads stations.[142] George Jackson Churchward - Locomotive Superintendent (1902–1915) and Chief Mechanical Engineer (1915–1921) who instigated much standardisation of locomotive components.[4] Charles Collett - Chief Mechanical Engineer (1922–1941).[48] William Dean - Locomotive Superintendent (1877–1902).[48]