Hi JHZ563, Are the silos / the whole complex for grain? Gravel? Cement stuff? (Shows how much I don't know, and haven't seen, huh.)
The hopper cars are all for coal, a mix of loads and empties. This picture is a little misleading as it is taken from the top of a boiler structure, yet you can't see the boiler. The blue structures on the right are for crushing and prepping limestone, which is used in the exhaust scrubbing process. The light colored silos on the left have to do with ash collection and carbon reclamation from ash.
If I can find a public use overhead view of the plant I will post it next week for clarification
Here is an overall satellite view of the heart of the plant. Very little of what you see is actually for making power. Most of the equipment you can see from the sky is for environmental compliance.
The black pile on the right is coal. the grey pile on top left is limestone. The tan area, top center is gypsum made from spent limestone in the scrubber equipment, used for making wallboard. The top RR tracks are the NS line.The storage tracks just below that are for hoppers that bring in the limestone. the majority of the tracks are for full/empty coal trains.