my pond is 6 months old it is almost full , we had heavy rain over the weekend , the back side of my dam slipped the slip is about 30 yards long . half of the top of my dam sunk 2 ft the half on the back side i am trying to get the water level down by cutting stand pipe 6 inches at a time. im afraid it is going to break what all could have caused this my pond builder is on vacation cant get ahold of him any ideas of what to do so this doesnt happen again.