growing in Narragansett, RI
My dad thinks its a Beach tree, but not sure

I will categorically say that it is NOT a Beach tree - nor a Beech tree (Fagus grandifolia).

I am not certain about what it is, though. You could take some additional pictures of those leafy branches. If your dad permits, cut off a piece (a foot or two or more) and take it where you can closely and clearly photo tops and bottoms of the leaves, stems, and branches. Get some close shots of where the leaf attaches to the stem AND any terminal bud. Show where there are clear markings along the stems/branches where each year's growth started (bud scars).

What I usually say first: show the WHOLE tree, and then the various details.

UPDATE, more pics

Looks like Balsam Poplar, Populus balsamifera, is a possibility.

I'm in KellyFW's camp - it's a Poplar (Populus sp.) of some sort.

Since there is no picture that shows the whole tree, I can't be certain at all, but I wonder if it is one of the fast growing hybrid poplars that are often hyped.

The tree is about 24+ years old, i say so because i am 24years old, my dad says it was just a few feet tall when he bought the house a year before i was born. the yard originally had many unique plants and trees when they first bought the place they say. i cant really photograph the whole tree, its hard to judge how tall it is but im thinking at last 40+ feet, towering way above the power lines. there aren't any actual limbs except towards the very top, mostly just small branches coming out of the trunk in all directions. My dad said he identified it as a beech tree by the bark, read something online about the rough bark at the bottom turning to smoother with horizontal lines the rest to the top (i put a pic of where the bark changes). if any of this info helps...

Everything you wrote aligns with the identification of this plant in the Populus genus.

There is nothing in your photos - leaves, buds, stems, trunk, bark - that match with Beech. The growth rate is far too fast for Beech as well - but fits right in there with a vigorous genus of trees like the Poplar clan.

If you doubt this, please look up information about Beech trees. They have smooth gray bark into the very oldest of age. So smooth, that the bark is often defaced by people carving initials and other vandalism - which never goes away.