Route the storm causing full spillway (spillway at design capacity) through dam without dam failure. Is there potential loss of human life from this flood? Yes Route same storm causing full spillway through dam with overtopping dam failure. Is there potential loss of human life from this flood? Is potential loss of human life greater from flood with overtopping dam failure than from flood without dam failure? Yes Can spillway size be found in which potential loss of human life from routed store is no greater with dam failure than from routed storm without dam failure?