If it was up here in the northwest I would have definitely guessed "cottonwood". Had a bunch of them at my old house and they looked just like that. I had to cut a few down one time.... When I put the face cut in it, water started POURING out of it (like a garden hose at half pressure)!! My first thought was that the center was rotted out and holding water. So needless to say It made me a little nervousness since I can count on 2 hands the number of trees I had fallen prior to that day.( but I watched a lot of you tube first, lol) Long story short, the tree was perfectly fine.... They just hold that much water normally. Any trees like that over east?
We have Cottonwoods all over the North East! ;) very common..(Im in Western NY and we have a ton of them)
They get HUGE! some of our largest trees in these parts..
and in early summer, if you have a nice grove of them, the ground is covered a few inches deep with their "cotton"! looks like snow! ;)
(the cotton is their seeds..for a week or two every year they dump out the cotton like crazy.) (I actually wouldn't want one in my yard! would be very messy..)
this one in PK's photo is smaller, (but big trees have to start out small! ;)
but it looks just like the cottonwoods I have seen..I see that exact style of bark on them all the time..