operation begins on São Paulo Metro, Brazil. Amtrak discontinues its Expo '74 service. September 15 – Amtrak introduces the Blue Water Limited passenger train between Chicago and Port Huron, Michigan. September 16 – Passenger traffic begins through the Bay Area Rapid Transit (BART) Transbay Tube between Oakland and San Francisco beneath San Francisco Bay, the world's longest and deepest immersed tube tunnel. Unknown date The original Norfolk Southern Railway is merged into the Southern Railway (US). John W. Barriger III steps down from the presidency of the Boston and Maine Railroad. The Atchison, Topeka and Santa Fe Railway operates the last train ever on its subsidiary Grand Canyon Railway; it is a maintenance of way train. Accidents Births Deaths References Rivanna Chapter, National Railway Historical Society (2005), This Month in Railroad History – June. Retrieved June 13, 2005.