Iowa is littered with grain elevators. As an outcome of deregulation and railway consolidation many elevators found it best to have their own equipment to position hoppers for loading.
The tags under the window indicate ownership is Countrywide Grain Terminal. They own the elevator this is parked next to.
Research by Robert
suggests this might be ex-C&NW 4144
EMD GP7's and GP9's were constructed with high short hoods but many received after-market chops that look like this.