I put the silt over the rocks because I don't want the lake to leak. The rocks are limestone, which I heard are the worst for leaking. The silt won't run off because I have ridges around it with packed clay. Here in Georgia we have blazing summers, so hopefully the silt will dry out and I can pack it.
Before I covered the areas with silt, it was around 20ft deep. Which I heard is a no-no in the south because of stratification. With the silt unpacked, it still has 12-14 ft of water over it ( or it will when contruction is finished).
The silt is not from run-off.
I have all the banks covered with grass, so I don't think silt will be a problem in the future. I don't have any where to put the existing silt, so I put it over the rocks.
