Brettski:

I'd also definitely install some type of cage. Make it out of cattle panels, 6"x6" openings and as big as you want. It'll stop brush (and small children) from getting sucked up against that pipe.

Had a buddy's pipe get plugged by a large snapping turtle...took a couple days with a 20' pipe and lots of bashing to get it broken up enough to come out. Luckily, no huge rain events before we got it taken care of. Obviously...take a heckuva a turtle to plug yours, but an animal carcass (deer?) would do the same thing, perhaps.

I've got to assemble one tonight for my north pond (6" pipe)...thanks for the reminder.

In a lifetime, the average driver will honk 15,250 times. My wife figures I'm due to die any day now...