West Branch Susquehanna River at Lewisburg, Northumberland County PA (LWBP1)
Gage Location: Northumberland County, Pennsylvania Site Location: Union County, Pennsylvania
Latitude: 40.968Longitude: -76.876Elevation: 428.2 ft. MSLDrainage Area: 6847 Sq. Mi.
Minor Stage: 18 ft. Moderate Stage: 23 ft.Major Stage: 28 ft.
First Flood: 1865-03-17Last Flood: 2011-09-08 Crest: 25.75 ft.Datum change: 1940-07-02Number 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
18980
18990
19000
19010
19021
19030
19040
19050
19060
19070
19080
19091
19100
19110
19120
19130
19140
19150
19160
19170
19180
19190
19200
19210
19220
19230
19240
19250
19260
19270
19280
19290
19300
19310
19320
19330
19340
19350
19361
19370
19380
19390
Year
After Datum Change
Number of Floods
19401
19410
19422
19430
19440
19450
19461
19470
19481
19490
19502
19510
19521
19530
19541
19550
19562
19570
19580
19591
19601
19611
19620
19630
19641
19650
19660
19670
19680
19690
19700
19710
19721
19730
19740
19751
19760
19770
19780
19791
19800
19811
19821
19830
19841
19850
19861
19870
19880
19890
19900
19910
19920
19931
19941
19950
19961
19970
19981
19990
20000
20010
20020
20030
20041
20051
20060
20070
20080
20090
20102
20113
20120
20130