David Elson Gratz, born on 7 July 1927 in Columbus, Ohio, is a professional engineer best known for his work on, and notable for his extensive historical documentation of, the Monongahela Railway.
The primary connection to both controlling systems was at Brownsville, Pennsylvania - with the south end of the P&LE's Pittsburgh, McKeesport and Youghiogheny Railroad and with the PRR's ex-Brownsville Railway.
Canadian Pacific Railway | Great Western Railway | Shanghai Railway Bureau | Canadian National Railway | Midland Railway | Grand Trunk Railway | London and North Western Railway | Northern Pacific Railway | London, Midland and Scottish Railway | Great Central Railway | Riccarton Junction railway station | Border Union Railway | Border Counties Railway | London King's Cross railway station | Great Eastern Railway | Southern Railway | BNSF Railway | London and North Eastern Railway | Central railway station, Sydney | Monongahela River | Atchison, Topeka and Santa Fe Railway | Euston railway station | St Pancras railway station | Amsterdam Centraal railway station | Luxembourg railway station | heritage railway | Trans-Siberian Railway | Lancashire and Yorkshire Railway | Edinburgh Waverley railway station | Perth railway station |