Railway Grand Division: Administrative unit which oversaw 4-5 Railway Operating Battalions (ROB) and 1-2 Railway Shop Battalions (RSB)
Railway Operating Battalion: TO&E consisted of four (4) companies:
- A: Two (2) track platoons and one bridge platoon to handle construction
- B: Shop company: Two platoons responsible for equipment maintenance, one platoon shopped the rolling stock
- C: Operating & Supply company: provided engineers, conductors, and operations personnel
- H & S: Supplied the dispatchers, telegraphers, MPs, and other support personnel
Railway Shop Battalion: Performed major/minor overhauls, electrical repair, blacksmithing
- A: Responsible for lathes, milling machines, locomotive repair
- B: Boiler repair, firebox rebuilds, blacksmithing
- C: Foundry operation
- H & S: Administrative duties, supply and maintenance of shop power and equipment