Pond Boss Forums POND CONSTRUCTION Renovating a Pond or Lake? connecting two ponds

I did something similar - I took an existing 2.5 acre pond and build a 5 acre pond around it essentially...I had the larger levee constructed downhill and let it partially fill then had a trackhoe break the dam of the small pond, letting all the fish run into the big one.

Worked well and had the added benefit of having a pretty cool structural aspect to the big pond - they shaved the old levee down so that it would be 3-4 feet under water at full pool of the new pond, and with the deep channel cut through the middle of it when they broke the dam, it's a really neat underwater structure that you can always count on having fish holding on it.

The only regret I have is not cleaning some of the decades of muck out of the old pond before it refilled as an arm of the new pond. I wish I'd done that to increase the depth of that channel. Otherwise it worked out just fine.