Coal was an essential supplier of heat and power for homes and business at one time in America. Local coal dealers were in nearly every small town in most parts of the country. Depending upon the severity of the local winter weather, a fair number of loads would be delivered during the cold season.
Coal dealers ranged from a piles of coal trackside to giant bunkers with elevators to raise the coal for storage. Some dealers had low trestles that allowed the coal to fall on the ground. Many dealers used electric conveyors to move the coal from the hopper to a pile or from the pile to a truck for delivery.
I built a coal conveyor many years ago and wrote an article in the Gazette describing the construction. Chuck Yungkurth was kind enough to gather a number of photos for me and prepare a number of drawings that were used in the article. My model was built using styrene. The wheels are not accurate but they fit the deadline for publication.
The nice part of this industry you could fit them in a small place on your layout.