My 7 pennies:
Weyawega (waupaca county) train derailment lasted quite a bit.
During emergencies any one can use amateur radio right? And during weather spotting this past summer I heard some guy never I.D. said 10-4 and copy many times on the ham repeater using the ham radio in the sheriff comm. center (I'm assuming it was an deputy or the county emergency management guy). Oops maybe I'm wrong I glanced at the rules and it seems to be only in getting help, otherwise the control operator has to physically be there at the radio.
And there's (or used to be) a repeater in Wausau that retransmits space shuttle communications (I lived in stevens point then wisconsin rapids at the time).
Also if it's a railroad frequency whether police are using it or not it's allocated as a railroad freq.
I'm probably wrong just wondering, kind of...