• Tugboats
    Tugboats shown along the Mississippi River corridor. Some of these have been retrofitted to reduce emissions.
    Photo courtesy of Mississippi River Corridor and Ingram Barge Company
  • Portable sampling equipment
    Portable emissions sampling equipment on a retrofitted tugboat
    Photo courtesy of Mississippi River Corridor and Ingram Barge Company
  • high horsepower marine engine
    A large, high horsepower marine engine used in a tugboat
    Photo courtesy of Mississippi River Corridor and Ingram Barge Company
  • emerging technology DOC and CCV on a tugboat
    Installation of emerging technology diesel oxidation catalysts (DOCs) and crankcase ventilation systems on a tugboat
    Photo courtesy of Mississippi River Corridor and Ingram Barge Company
  • Tugboat
    Retrofitted engines mean a cleaner environment along the Mississippi River.
    Photo courtesy of Mississippi River Corridor and Ingram Barge Company