 The third biggest flood , <unk> at 29 @.@ 8 feet ( 9 @.@ 1 m ) in Lock Haven , occurred on June 1 , 1889 , and coincided with the <unk> Flood . The flood demolished Lock Haven 's log boom , and millions of feet of stored timber were swept away . The flood damaged the canals , which were subsequently abandoned , and destroyed the last of the canal boats based in the city . 
