So at the local public dirt jump spot there was a lot of dirt dropped off. There isn't any loose topsoil left and underneath the topsoil was a lot of really wet dirt/ clay mixture. When I tried to work with the dirt I would dig some out of the pile and it would just come out in huge chunks. I would bring the dirt to the jump and pack it in and everything. When I would try to shape the jump and chunks of clay would just rip out of the topsoil of the jump. Any advice or techniques what you guys do building jumps with clay? thanks a lot.