South Branch Potomac River near Petersburg, Grant County WV (PETW2)
Gage Location: Grant County, West VirginiaSite Location: Grant County, West Virginia
Latitude: 38.991Longitude: -79.176Elevation: 968.34 ft. MSLDrainage Area: 651 Sq. Mi.
Minor Stage: 14 ft. Moderate Stage: 15 ft.Major Stage: 17 ft.
First Flood: 1877-11-24Last Flood: 2014-05-16 Crest: 14.38 ft.Datum change: 2011-03-16Number of Floods: 30

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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 ft1136.713 ft or above 30100.0
14 ft to 15 ft930.014 ft or above 1963.3
15 ft to 16 ft26.715 ft or above 1033.3
16 ft to 17 ft13.316 ft or above 826.7
17 ft to 18 ft00.017 ft or above 723.3
18 ft to 19 ft00.018 ft or above 723.3
19 ft to 20 ft13.319 ft or above 723.3
20 ft to 21 ft26.720 ft or above 620.0
21 ft to 22 ft26.721 ft or above 413.3
22 ft to 23 ft26.722 ft or above 26.7
Height Above Flood Stage After Datum Change
Height Above FSTotal OccurencePercent of Crest OccurrenceCumulative Total Flood OccurrencePercent of Floods above Listed Value
14 ft to 15 ft1100.014 ft or above 1100.0
15 ft to 16 ft00.015 ft or above 00.0
16 ft to 17 ft00.016 ft or above 00.0
17 ft to 18 ft00.017 ft or above 00.0
18 ft to 19 ft00.018 ft or above 00.0
19 ft to 20 ft00.019 ft or above 00.0
20 ft to 21 ft00.020 ft or above 00.0
21 ft to 22 ft00.021 ft or above 00.0
22 ft to 23 ft00.022 ft or above 00.0