Pond Boss Forums POND CONSTRUCTION Building a dam Spillway recovery from record rains

It helps to line the bottom of the spillway with geotex fabric and make durn sure that the leading edge is under ground so that the water doesn't get under it. That fabric will help minimize dirt being washed out from under the rip-rap. You can also use cages of stone in the emergency overflow to help act as a dam to slow down the water velocity. Talk to your counties NRCS office to get some engineering help with the watershed and spillway.

I'd also look into putting one or two 12" siphon drains if you have enough fall for them to function correctly.