>>5013573
>>5013401
one guy trekked out to it a while back, he said it was 3ft high and since you don't get a clear view of it on foot you would have no idea it stretched for half a mile. The guy planned the trip out for years and waited for a period where the swamp would fill up enough for him to get boated most of the way there. So far he is the only person to have ever seen it up close (or at least was when I read up on it earlier this year). Iirc what's impressive isn't just that single big dam but that there is a series of other smaller dams since the beavers eat the greens that grow in their artificial swamps in a rotation, just like some birds using multiple nests.