I'm having some trouble finding a local source for heavy wet clay, to seal off the seeping ledge.
I located a place that has the dust from making granite rock into crushed stone for drainage . I was told they use it to seal leach fields of spetic systems. I have 500 lbs. of bentonite on hand, if I mix it together with the stone dust any chance of this working or should I keep looking for the wet heavy swamp clay?