| 18.7 | Corp. of Engineers 100 yr Flood | | 13.5 | Houses on left bank in Graterford flooded | | 13.0 | Sewage treatment plant in Swenksville flooded | | 12.0 | Penitentiary bridge is closed. Flooding begins in Collegville. Houses on the right bank in Graterford take on water | | 10.0 | The first evacuations begin in Swenksville upstream of the gage | | 9.0 | Flash Flood Alarm sounds at the County EOC | | 8.0 | Park Avenue in Swencksville is flooded |
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1) 18.26 ft on 07/09/1935
2) 17.08 ft on 06/22/1972
3) 16.65 ft on 08/23/1933
4) 16.59 ft on 09/16/1999
5) 16.45 ft on 01/19/1996
6) 16.20 ft on 06/02/1946
7) 15.67 ft on 10/19/1996
8) 15.06 ft on 07/07/1984
9) 14.92 ft on 10/08/2005
10) 14.80 ft on 01/24/1979
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1) 0.00 ft on 10/04/1941
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