Just to shareThe trestle bridge sets on concrete pilings set deep into the soil at the banks. A tree growing literally on top of the piling or nearly could definitely be felled if the piling failed upon the collapse.
Again, totally spitballing here.
A number of yeas ago driving to work at 0530 in my Range rover ( pos car) there was a crash. A branch 15" in diameter came off a dead tree on the road side and landed on the windshield roof junction and a piece pierced my front hood.
My glass fragments int both hands which I had to pull out with pickups.
Called wife to drive me to work. Car was towed to bodyshop . $14K in repairs. But It was just not my day. Little more on the roof and I could have been quadriplegic.