I believe you might be thinking about the Model 2 in St Francis, or the Whelen 3016 in Madawaska. I checked the Maine map, and Portland was the only place with a Thunderbolt. There are 3 more sirens in Portland according to an old news article, but they're not listed on the Maine map. Who knows, it ...
I found something interesting not too long go.... http://rediscoverportland.com/images/portland-exposition-building.jpg It is the only Thunderbolt in the entire State Of Maine! Im not sure if it is operational and it's very rusty, but here it is on Google Maps: https://www.google.com/maps/@43.655821...
This is an edit of my first post. Previously listed information was incorrect Recently I have been researching the Emergency Planning documents that were of the former Maine Yankee Nuclear Power Plant, and I have learned a lot about the siren system that was in place when the plant was operational. ...