first, (sorry to go off topic on this thread briefly)Cranberry bog can be whatever depth you choose 12-24" deep. Cranberries are as cold hardy as they come surviving even in zone 1 (that's something like -50F). They can survive being frozen solid...I've seen them that way.

Second, the sediment would kill the pump in a hurry. You'd have to line the "stream" and have a reservior at the bottom end to house the pump. This is the water garden I just completed with a stream between the two ponds. Next year I'll add another bog garden around the upper pond and landscape to bring the surrounding area up to pond level.

{{gwi:430238}}

WOW!

Very nice work Fred!