Your title about says it all. Happened to talk to my local fire chief, ran your senario past him. He says talk to your own farm insurance. they're about the only ones with any responsibility here. My guess is that the damage will fall under your deductible, I know it would on mine, and you'll probably eat the loss anyway. One thing you should do is to photograph and measure the damaged area, you'll need the evidence if a claim is filed. He was not happy about the narrow bridge part either. He's been getting pretty hard nosed about those who's bridges, farm lanes and tree branches are prohibitive to getting fire equipment in. Your neighbor may be getting some communication from fire dept for this. Fire equipment is getting huge in the past few years. You ought to see the new truck our VFD had to purchase. A few years back, the school bus had to make a turnaround in my drive. Took a lot of branches down for that. Probably ought to clear the branches in the dirve again.