Pond Boss Forums POND CONSTRUCTION Renovating a Pond or Lake? What to use to plug pipe from backside of dam?

the pipe is corrugated. about 10 or 12 inches in diameter. i'm considering using an expanding foam sealer of some sort. maybe get a can that has an auto release/flow option. the tricky part will be getting the can far enough into the pipe. the dam is about 35' across at the base so i think the plug should be at least halfway (the middle of the dam). i think this will be possible if i run a piece of pvc to the halfway point then push the can of foam sealer through the pipe to the midway point. what are yall's opinions on using expanding foam sealer. i like the basketball idea...........

"across" at the base of the dam being from wet side to dry side. therefore the pipe is approx. 35'.

i'd say the flow is about 5 gallons per hour (or less) regularly, but after a rain the flow increases proportionate to the amount of rainfall.... ie: the heavier the rainfall, the more water flowing from the pipe.

the pond has a designed "emergency" overflow around the side of the dam. once i get it plugged i plan to add a pvc drain in the area of the overflow to make it the normal spillway and prevent erosion.......