disconnect fitting 72 and longitudinal hatch 64 is raised to the fig4 position the car is filled with coal and a train containing the car delivers the coal to a power plant the power plant is constantly burning coal and creating fly ash for environmental purposes the fly ash must be disposed of in an environmentally safe manner one manner of disposing of fly ash is to place it in the ground where the coal was mined e g back at the strip mine from which the coal came in order to accomplish this the fly ash must be hauled from the power plant to the mine with this invention the same hopper car which hauled the coal to the power plant can be used for the return trip of hauling fly ash back to the coal mine otherwise the hopper car would go back empty and a vehicle especially suitable for handling fly ash would be needed for handling fly ash at the power plant longitudinal hatch 64 is down and circular hatch 66 and vent 67 are open a circular chute fits into opening 66 and delivers the fly ash to cargo space 20 via pressurized air which is vented through filter 69 and vent 67 because of the construction which effectively seals the cargo space 20 of the hopper car from outside moisture the fly ash contents do not get wet and hence do not cake or become more caustic.