33.29' - Water reaches the record flood level of the ST. Patricks Day Flood and crest on March 18, 1936.<br><br>25' - Some buildings in the industrial park 1/4 mile upstream from the Lock begin to flood.<br><br>24.1' - Water reaches the level reached during Hurricane Ivan September 18, 2004. Freeport received 6 inches of rain.<br><br>22.8' - Backwater from Buffalo Creek surrounds the sewage disposal plant on Lower Market Street. Basements on First, Second and Lower High and Market Streets in town begin to flood.<br><br>20.2' - Lock walls overtopped.<br><br>16' - Navigation suspended. Lock out of service.<br><br>