77.5' - Structures on the shore of Lake Marion and low lying islands are threaten by flood water.<br><br>77.09' - Flood water approaches roads nearest the lake.<br><br>77' - Flood stage - areas and beaches on Lake Marion begin to flood.<br><br>76.8' - Full pool<br><br>76' - Swamps in the upper reaches of Lake Marion begin to fill.<br><br>