So I've been watching to water flowing into the pipe all winter through the layer of gravel
I hit the gravel while core trenching behind the dam
It runs about 10' down and 18" thick it runs up the ravine to the end of the dam

I want to finish core trenching before the snow melt , I'm worried that I'm going to have to much water pressure with a full pool
I'm also worried about the frost in the ground and not being able to core through it with the excavator
I guess I'll have to time it right.
I'm figuring I'll have to run the 3" thrash pump

I've been pumping the water back into the pond with a small sump pump, the pump runs a bit quicker then the water inflow
When I shut the pump off it fills pretty quickly

Anyone in my area want to give me a hand ??

I'll post some pictures as I'm working

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