McKeesport, PA, John W. Barriger III photo.
Huntington, WV area customer 1949 and 1950 car counts – a month by month breakdown of cars shipped and received for Huntington area customers
B&O Ohio River Railroad 1981 Waybills – a large collection of waybills mostly from 1981 for inbound shipments to Ohio River Railroad customers
B&O St. Louis Division Customers 7-1-1973 – a great overview of the St. Louis Division including customers, commodities shipped, and the jobs serving them.
B&O Baltimore Deliveries 5-27-1901 – a listing of many Baltimore area industries in 1901 and which yard carloads should be routed to reach them
Chessie Coal Mine Carloadings May 1985 – shows carloadings by mine for the month which was used to calculate the mine rating. I believe the mine rating was used in allocating empty cars, though I’m not certain on this.
Chessie System Roadway Maps between Philadelphia and Brunswick 4-15-1981 – I’m not sure if the railroad originally issued this as bound photocopies or if I have a copy of an original. Many of the pages are hard to read due to poor copy quality.
B&O Through and Local Package Car Schedule 8-1-1928
B&O Through and Local Package Car Schedule 7-15-1937
B&O Package Car Directory and Loading Instructions 6-15-1946
B&O Freight Schedule 9-1-1971 – pages 125-128 missing unfortunately.
B&O Stockyards Cincinnati Engineer Register 10-1953 to 7-1954
Multimodalways.org hosts Freight Working Book 57 from 1957. They also have Block and Station Record of Train Movements from CGW Jct. (Chicago) and Keyser, WV.
Historic Railroad Documents has a 1923 freight schedule, employee timetables, and lineups from Willard Tower from 1969.
The Baltimore and Ohio Railroad Historical Society offers a huge selection of freight classification books and other resources.