I can confirm the damage report, as I was on the train when it happened. Photos attached.
On 2018 SEP 22, train 690 (southbound) apparently struck a tree limb between Durham and Exeter.
I boarded in Dover, and saw "Ocean View" from the outside with no evidence of damage. I went to the meal car first to get breakfast. Went I got back and up into the dome, there was a big hole in the window.
It only broke the outer window, not the inner, so the passenger compartment was not directly compromised. There were bits of tree bark in between the two panes of glass (photo 3).
I don't think the train crew even knew it happened until we got to North Station. We were also on the 691 heading north, and they had the dome car closed and locked. Wouldn't let anyone in. But they didn't kick us out on the way down.
They stopped the 691 for a good 10 to 20 minutes between Exeter and Durham. The conductor said it was to allow a work crew to finish clearing the low-hanging limb. That's why I say that's where the strike must have been
We also took the 698 south from Portland, and they had already sidetracked "Ocean View" at that station. Was around 7:00 PM. I don't know what might have happened to it between then. It may have made the rest of the trip north to Brunswick before coming back, or maybe they separated it there and then. A station employee felt it necessary to eject me from their back lot (near the track, good photo spot), so I didn't get a chance to see.