Schuylkill River at Norristown, Montgomery County PA (NRSP1)
Gage Location: Montgomery County, PennsylvaniaSite Location: Montgomery County, Pennsylvania
Latitude: 40.111Longitude: -75.347Elevation: 51 ft. MSLDrainage Area: 1760 Sq. Mi.
Minor Stage: 13 ft. Moderate Stage: 17 ft.Major Stage: 19 ft.
First Flood: 1933-08-24Last Flood: 2014-05-01 Crest: 20.83 ft.Datum change: 2011-08-17Number of Floods: 21

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Height Above Flood Stage for Entire Period of Record
Height Above FSTotal OccurencePercent of Crest OccurrenceCumulative Total Flood OccurrencePercent of Floods above Listed Value
13 ft to 14 ft314.313 ft or above 21100.0
14 ft to 15 ft14.814 ft or above 1885.7
15 ft to 16 ft14.815 ft or above 1781.0
16 ft to 17 ft419.016 ft or above 1676.2
17 ft to 18 ft29.517 ft or above 1257.1
18 ft to 19 ft29.518 ft or above 1047.6
19 ft to 20 ft419.019 ft or above 838.1
20 ft to 21 ft14.820 ft or above 419.0
21 ft to 22 ft14.821 ft or above 314.3
22 ft to 23 ft14.822 ft or above 29.5
23 ft to 24 ft00.023 ft or above 14.8
24 ft to 25 ft00.024 ft or above 14.8
25 ft to 26 ft14.825 ft or above 14.8
Height Above Flood Stage After Datum Change
Height Above FSTotal OccurencePercent of Crest OccurrenceCumulative Total Flood OccurrencePercent of Floods above Listed Value
13 ft to 14 ft342.913 ft or above 7100.0
14 ft to 15 ft114.314 ft or above 457.1
15 ft to 16 ft00.015 ft or above 342.9
16 ft to 17 ft114.316 ft or above 342.9
17 ft to 18 ft00.017 ft or above 228.6
18 ft to 19 ft00.018 ft or above 228.6
19 ft to 20 ft114.319 ft or above 228.6
20 ft to 21 ft114.320 ft or above 114.3
21 ft to 22 ft00.021 ft or above 00.0
22 ft to 23 ft00.022 ft or above 00.0
23 ft to 24 ft00.023 ft or above 00.0
24 ft to 25 ft00.024 ft or above 00.0
25 ft to 26 ft00.025 ft or above 00.0