Jeff
Stop Staring!!!!!
Here are a couple of links you might want to have a look at. Each list has to do with frequencies that may/may not be used daily but have a tendency to go active whenever there is a Mutual Aid situation underway or Multiple Organizations are working together on an event.
Common/Shared Scanner Frequencies and Radio Frequency Reference
Common Public Safety - The RadioReference Wiki
Common/Shared Scanner Frequencies and Radio Frequency Reference
Common Public Safety - The RadioReference Wiki