29.4' - Pennsylvania Railroad main line and sidings affected at Tarentum PA, 3 miles downstream floods.<br><br>21.5' - The Natrona Water Company is affected.<br><br>21.3' - Water begins to back up into the sewers at Braeburn Steel Co.<br><br>21' - Lock walls overtopped.<br><br>18' - Navigation suspended, lock out of service.<br><br>