Back when CB&Q used steam engines, Downers Grove used to be the terminus for some of the commuter trains. So Downers Grove had facilities for servicing steam engines. The turntable used to be where the base of the microwave tower is now.
The land on the right is where the roundhouse was. The orange to the left of the microwave tower is the caboose of a maintenance train.
And in this view I included the top of a stack of new tiles. I'm guessing that this unit cuts old ties and then conveys the pieces back to the gondola car.
To the east of the tower was a high-rail truck. Judging from the gripper on the end of the boom, I'm guessing that they use this truck to carry and deliver the new ties.
I noticed that the parking area was "paved" with ballast rock. I took a picture because it was crushed granite instead of dolomite. There is plenty of dolomite in Illinois. There is no granite in Illinois except for sporadic glacier erratics. I wonder how far BNSF shipped this rock. I cropped the picture to include the rock on the lower right. It caught my eye because it is particularly fine grained and planar.