Susquehanna River at Conowingo, Harford County MD (CNWM2)
Gage Location: Harford County, MarylandSite Location: Cecil County, Maryland
Latitude: 39.659Longitude: -76.174Elevation: 5 ft. MSLDrainage Area: 27100 Sq. Mi.
Minor Stage: 23.5 ft. Moderate Stage: 28 ft.Major Stage: 33 ft.
First Flood: 1970-02-04Last Flood: 2011-09-09 Crest: 32.41 ft.Datum change: 1967-10-01Number of Floods: 26

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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
23 ft to 24 ft27.723 ft or above 26100.0
24 ft to 25 ft519.224 ft or above 2492.3
25 ft to 26 ft519.225 ft or above 1973.1
26 ft to 27 ft415.426 ft or above 1453.8
27 ft to 28 ft27.727 ft or above 1038.5
28 ft to 29 ft311.528 ft or above 830.8
29 ft to 30 ft00.029 ft or above 519.2
30 ft to 31 ft27.730 ft or above 519.2
31 ft to 32 ft00.031 ft or above 311.5
32 ft to 33 ft13.832 ft or above 311.5
33 ft to 34 ft00.033 ft or above 27.7
34 ft to 35 ft13.834 ft or above 27.7
35 ft to 36 ft00.035 ft or above 13.8
36 ft to 37 ft13.836 ft or above 13.8
Height Above Flood Stage After Datum Change
Height Above FSTotal OccurencePercent of Crest OccurrenceCumulative Total Flood OccurrencePercent of Floods above Listed Value
23 ft to 24 ft27.723 ft or above 26100.0
24 ft to 25 ft519.224 ft or above 2492.3
25 ft to 26 ft519.225 ft or above 1973.1
26 ft to 27 ft415.426 ft or above 1453.8
27 ft to 28 ft27.727 ft or above 1038.5
28 ft to 29 ft311.528 ft or above 830.8
29 ft to 30 ft00.029 ft or above 519.2
30 ft to 31 ft27.730 ft or above 519.2
31 ft to 32 ft00.031 ft or above 311.5
32 ft to 33 ft13.832 ft or above 311.5
33 ft to 34 ft00.033 ft or above 27.7
34 ft to 35 ft13.834 ft or above 27.7
35 ft to 36 ft00.035 ft or above 13.8
36 ft to 37 ft13.836 ft or above 13.8