West Branch Susquehanna River at Williamsport, Lycoming County PA (WILP1)
Gage Location: Lycoming County, PennsylvaniaSite Location: Lycoming County, Pennsylvania
Latitude: 41.236Longitude: -76.907Elevation: 494.98 ft. MSLDrainage Area: 5682 Sq. Mi.
Minor Stage: 20 ft. Moderate Stage: 21 ft.Major Stage: 30 ft.
First Flood: 1865-03-17Last Flood: 2011-04-28 Crest: 20.27 ft.Datum change: 1928-10-01Number of Floods: 39

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Year
Before Datum Change
Number of Floods
18651
18660
18670
18680
18690
18700
18710
18720
18730
18740
18750
18760
18770
18780
18790
18800
18810
18820
18830
18840
18850
18860
18870
18880
18891
18900
18910
18920
18930
18941
18950
18960
18970
18981
18990
19000
19011
19021
19030
19041
19050
19060
19070
19080
19091
19100
19110
19120
19131
19140
19150
19162
19170
19181
19191
19201
19210
19220
19231
19240
19250
19260
19270
Year
After Datum Change
Number of Floods
19280
19290
19300
19310
19320
19330
19340
19350
19362
19370
19380
19390
19401
19410
19421
19430
19440
19450
19461
19470
19481
19490
19501
19511
19520
19530
19540
19550
19561
19570
19580
19591
19601
19611
19620
19630
19641
19650
19660
19670
19680
19690
19700
19710
19721
19730
19740
19751
19760
19770
19780
19791
19800
19810
19820
19830
19841
19850
19860
19870
19880
19890
19900
19910
19920
19931
19940
19950
19961
19970
19980
19990
20000
20010
20020
20030
20041
20050
20060
20070
20080
20090
20103
20111
20120
20130
20140