Mid-Michigan Railroad

Reporting mark: MMRR
CSX - Grand River Swing Bridge (Ottawa County, Michigan)
Pratt through truss swing bridge over Grand River on CSX RR
Open to traffic

CSX - Muskegon River Bridge (Muskegon County, Michigan)
Built 1924
Warren through truss with all verticals bridge over Muskegon River on Mid-Michigan Railroad
Open to traffic

GR - Grand River Bridge (Kent County, Michigan)
Built 1904
Pratt through truss bridge over Grand River on Grand Rapids Eastern RR (formerly Pere Marquette RR)
Open to traffic

MMRR - Pine River Bridge (Gratiot County, Michigan)
Deck plate girder bridge over Pine River on Mid-Michigan Railroad
Open to traffic

MMRR - Thornapple River Bridge (Kent County, Michigan)
Pratt through truss bridge over Thornapple River on Mid-Michigan Railroad
Open to traffic