Pond Boss Forums AERATION Systems questions Overflow pipe leak, could lose the pond

New to the forum. I'm here because my 1 acre pond has an overflow pipe leak that could take the whole earthen dam. Pond is 1 foot above level of the overflow and I went to inspect overflow pipe expecting to see it flowing at full force. There is water coming from the pipe (probably 20 vertical ft below dam) but not what I expected. I see 20 feet from the output of the pipe there is water streaming out of a hole. It's an 12-18 inch pipe (not sure), not sure of material, white, doesn't feel metallic. There's a break in the pipe towards the dam.

Without repair this could take the whole pond out as it's eroding dam from the back side. Investigating at this point. Very hard to get a backhoe in this place. Bought the farm 3 years back. Previous owner built dam probably in 1995. No easy fix likely. Looking for ideas. Thinking of some way to snake a camera with a light up the pipe could help me understand how far up the problem is. Just because I see the water bubbling up 20 feet back doesn't mean that's where the problem is. More likely further back where all the weight of the dam is.