this work when you start putting in the clay core for the dam how clean is clean as you can see this the the stern at the walk with the dam standing to the side because everybody wants to be sure the foundation is clean to make a good bond between the clay and the foundation that is extremely critically portion of the project in terms of the dam safety now i'd like say that it is not going to be this tedious throughout the duration it will really when they first get started everybody is on the same page regarding how clean is clean before we move forward once everybody is on the same page that the pace starts to pickup, of course, a lot of handwork to make sure the clay is infected in the crevices and start using the equipment to