| There's undead still there but they're aren't hostile you mean? Hmm...I would say just load a previous save (hopefully you have one!), probably the easiest option, it doesn't take long to clear the bridges...unless there's something in the console to force the change or something, but I'm afraid I can't help you there.
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Did you ever wonder why we had to run for shelter when the promise of a brave new world unfurled beneath a clear blue sky? | 
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