670' - Water begins to flow over portions of the protective earthen dike. <br><br>667.85' - Water levels reach the flood of record.<br><br>665' - Lock gates and walls at Dam 5 go underwater. <br><br>664.5' - Lock and dam 5 is closed to navigation. <br><br>656.2' - Water begins to impact campsites along river downstream at Merrick State Park.<br><br>