Last event that would have topped the existing 2.5'Levee around the pond was 1992, prior to that 1957. So the cycle is quite long.. I'm inclined to drain, and start fresh. Should we be faced with this situation again (we typically have between 5-8 days warning because this is a river event that begins with heavy rains in central texas)I will t-post around the top of the levee and stretch a screen around the pond..