matching cars to industries

[Go Big1]

Thanks for the replies everyone. Logic was telling me that gravel would not be transported in a covered hopper, but it just got me thinking as to what type of car would be most prototypical for a layout based in the 70's. With your answers, I will look for some good 40' open hoppers for my gravel plant operation. But I also think I might still try to acquire those covered hoppers, as I am intending on having a concrete plant somewhere on the layout as well!