I put those (both ends) on a new culvert, I installed 2 years ago, in another pasture dam, with an Anti-seep collar, also.

I will consider an inlet one, for this round 24" pipe. {= the outlet actually drops water onto a big chunk of concrete, in the ditch area (under snow, in photo)}

I didn't mention, Dad and I about 8 years ago, stacked about 20-24 of those concrete bricks around inlet to help with that "swirl effect" and it has been stable, since then. Now, most of those bricks have gone under culvert, itself.