17.46' - Record flood with Tropical Storm Irene in August 2011. Widespread flooding in the region. Water reaches the Mill Point bridge.<br><br>10' - Major flood stage.<br><br>8' - Moderate flood stage. Water reaches homes in Lost Valley along Island Road.<br><br>7' - Water reaches Priddle Camp Road.<br><br>6' - Minor flood stage. Water reaches lowest houses in Burtonsville.<br><br>5' - The river is nearly bankfull and portions of Island Road in the Lost Valley community are inundated.<br><br>4.5' - Action stage. Water reaches Island Road in the Lost Valley community.<br><br>