I have a customer that has a hill that is washing out onto the road when it rains. It not a very steep hill. I am just looking for some opinions as to what I can do with it. I think if we got some grass to grow on it, it would really help from washing the mud down. But getting grass to grow on clay is pretty hard. What other options can I do? If we were to just seed the area how should I go about it? Here are the pictures.