Rock Springs has several coal related monuments and items on a park downtown located where it's old classic railroad depot is located. Indeed, the park borders on being a little busy as a result.
This is one of the items there, a State of Wyoming historical sign. If you click on the photo, you can get a larger version of the photo.
Coal was a major industry in the town, and indeed an entrance to an underground mine, now decommissioned, is very near this park. In fact, the development of the town over the former underground shafts and tunnels has proven to be a bit of a problem in later years.