Perkiomen Creek at Graterford, Montgomery County PA (GRAP1)
Gage Location: Montgomery County, PennsylvaniaSite Location: Montgomery County, Pennsylvania
Latitude: 40.229Longitude: -75.452Elevation: 112.66 ft. MSLDrainage Area: 279 Sq. Mi.
Minor Stage: 11 ft. Moderate Stage: 13 ft.Major Stage: 16 ft.
First Flood: 1915-01-07Last Flood: 2014-05-01 Crest: 16.2 ft.Datum change: 1927-09-14Number of Floods: 82

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Year
Before Datum Change
Number of Floods
19154
19160
19170
19182
19191
19200
19210
19220
19230
19240
19250
19260
Year
After Datum Change
Number of Floods
19270
19281
19292
19300
19310
19320
19331
19341
19352
19361
19370
19381
19390
19402
19410
19421
19432
19440
19451
19462
19470
19481
19490
19501
19510
19524
19531
19540
19553
19560
19570
19581
19590
19601
19610
19620
19630
19640
19651
19660
19671
19681
19691
19701
19711
19722
19731
19740
19751
19760
19771
19781
19791
19800
19810
19821
19831
19841
19851
19860
19870
19880
19891
19901
19910
19920
19931
19940
19951
19962
19970
19980
19991
20002
20010
20021
20033
20043
20053
20061
20071
20082
20090
20101
20113
20120
20131
20141