roads are already closed down. andrea. >> reporter: derek and anita, beyond this barrier is the river bottom park where picnic tables and soccer fields are now completely submerged. and it looks much the same down river in point of rock. these rushing waters of the potomac are washing right over a federal project under construction. a boat ramp and parking lot for runners and bikers along the canal. >> i'm up the hill. i think it's going to have to be biblical for it to get me. >> reporter: it's an area a cost tomorrowed to flooding -- accustomed to flooding. >> i know it was high in...