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Chattooga River at Summerville

Highest listed crest 22.63 ftFlood stage 14.0 ft39 crests since 1948

The Chattooga River at Summerville crested at major flood stage 6 times among the 39 crests the National Weather Service lists from 1948 to 2025. The highest, 22.63 ft on February 16, 1990, was major flooding, 8.63 feet above flood stage. 1 other gauge on the Chattooga River crested above flood stage within a week of it, 1 at its own highest listed crest.

The gauge

Highest listed crest
22.63 ft
February 16, 1990; 30,100 cubic feet per second
Flood stage
14.0 ft
Major flooding from 20.0 ft
Crests at major
6
21st of 271 gauges in Georgia
Most recent flood crest
February 13, 2025
16.24 ft, minor flooding
Location
Chattooga County
Georgia

Flood stages

The thresholds the National Weather Service uses for this gauge today, and how many listed crests reached each.

Flood categories, Chattooga River at Summerville
Action stage12.00—The level at which the NWS or its partners begin to take action
Flood stage (minor)14.026Feb 13, 2025Minimal or no property damage, but possibly some public threat
Moderate flood stage17.07Mar 26, 2021Some inundation of structures and roads near the stream
Major flood stage20.06Apr 13, 2020Extensive inundation of structures and roads

Every listed crest

39 crests from 1948 to 2025. Filled: at or above flood stage. Hover a crest for its date and stage.

Listed crests at the Chattooga River at Summerville, 1948 to 2025 141618202224ft Flood stage 14.0 ftMajor 20.0 ft Nov 28, 1948: 20.60 ft, major flooding; 22,700 cubic feet per secondMar 29, 1951: 21.00 ft, major flooding; 24,500 cubic feet per secondMar 4, 1966: 19.50 ft, moderate flooding; 20,400 cubic feet per secondMar 4, 1979: 19.43 ft, moderate flooding; 20,000 cubic feet per secondFeb 16, 1990: 22.63 ft, major flooding; 30,100 cubic feet per secondJan 7, 2009: 16.89 ft, minor flooding; 9,868 cubic feet per secondSep 21, 2009: 21.19 ft, major flooding; 26,900 cubic feet per secondDec 10, 2009: 18.36 ft, moderate flooding; 13,644 cubic feet per secondJan 25, 2010: 15.48 ft, minor flooding; 6,959 cubic feet per secondFeb 6, 2010: 14.89 ft, minor flooding; 5,868 cubic feet per secondMar 10, 2011: 17.54 ft, moderate flooding; 11,450 cubic feet per secondNov 29, 2011: 15.53 ft, minor flooding; 7,059 cubic feet per secondJan 15, 2013: 16.13 ft, minor flooding; 8,272 cubic feet per secondApr 29, 2013: 14.97 ft, minor flooding; 5,964 cubic feet per secondMay 5, 2013: 15.15 ft, minor flooding; 6,299 cubic feet per secondMay 20, 2013: 17.35 ft, moderate flooding; 10,975 cubic feet per secondApr 8, 2014: 15.13 ft, minor flooding; 6,260 cubic feet per secondDec 3, 2015: 15.36 ft, minor flooding; 6,697 cubic feet per secondDec 26, 2015: 20.51 ft, major flooding; 20,673 cubic feet per secondFeb 4, 2016: 15.04 ft, minor flooding; 6,163 cubic feet per secondFeb 25, 2016: 16.92 ft, minor flooding; 9,949 cubic feet per secondJan 23, 2017: 15.16 ft, minor flooding; 6,289 cubic feet per secondDec 10, 2018: 14.97 ft, minor flooding; 5,978 cubic feet per secondDec 29, 2018: 14.16 ft, minor flooding; 4,981 cubic feet per secondJan 20, 2019: 14.66 ft, minor flooding; 5,574 cubic feet per secondJan 24, 2019: 14.21 ft, minor flooding; 5,038 cubic feet per secondFeb 22, 2019: 16.13 ft, minor flooding; 8,240 cubic feet per secondFeb 7, 2020: 19.18 ft, moderate flooding; 16,041 cubic feet per secondMar 25, 2020: 14.30 ft, minor flooding; 5,141 cubic feet per secondApr 13, 2020: 21.48 ft, major flooding; 24,693 cubic feet per secondMar 19, 2021: 16.47 ft, minor flooding; 8,945 cubic feet per secondMar 26, 2021: 18.27 ft, moderate flooding; 13,319 cubic feet per secondApr 1, 2021: 15.21 ft, minor flooding; 6,384 cubic feet per secondSep 21, 2021: 14.62 ft, minor flooding; 5,523 cubic feet per secondFeb 24, 2022: 14.91 ft, minor flooding; 5,892 cubic feet per secondSep 4, 2022: 16.78 ft, minor flooding; 9,610 cubic feet per secondJan 10, 2024: 16.42 ft, minor flooding; 8,841 cubic feet per secondMay 10, 2024: 14.80 ft, minor flooding; 5,812 cubic feet per secondFeb 13, 2025: 16.24 ft, minor flooding; 8,473 cubic feet per second Highest, 22.63 ft, Feb 16, 1990 19501960197019801990200020102020

Crests at or above flood stage, by decade

Crests at or above flood stage per decade, Chattooga River at Summerville 1940s: 1 1950s: 1 1960s: 1 1970s: 1 1980s: 0 1990s: 1 2000s: 3 2010s: 19 19 2020s: 12 1940s1950s1960s1970s1980s1990s2000s2010s2020s
  1. These are the crests the local National Weather Service office lists for the gauge: the highest on record and recent crests. Lesser floods between them may be missing, so counts by decade are a floor.
  2. Categories use today's flood stages. Levees, dams and channel changes since a crest can make old and new stages not directly comparable.

Highest crests

Highest listed crests, Chattooga River at Summerville
1Feb 16, 199022.63+8.63Major30,100
2Apr 13, 202021.48+7.48Major24,693
3Sep 21, 200921.19+7.19Major26,900
4Mar 29, 195121.00+7.00Major24,500
5Nov 28, 194820.60+6.60Major22,700
6Dec 26, 201520.51+6.51Major20,673
7Mar 4, 196619.50+5.50Moderate20,400
8Mar 4, 197919.43+5.43Moderate20,000
9Feb 7, 202019.18+5.18Moderate16,041
10Dec 10, 200918.36+4.36Moderate13,644
11Mar 26, 202118.27+4.27Moderate13,319
12Mar 10, 201117.54+3.54Moderate11,450
13May 20, 201317.35+3.35Moderate10,975
14Feb 25, 201616.92+2.92Minor9,949
15Jan 7, 200916.89+2.89Minor9,868
16Sep 4, 202216.78+2.78Minor9,610
17Mar 19, 202116.47+2.47Minor8,945
18Jan 10, 202416.42+2.42Minor8,841
19Feb 13, 202516.24+2.24Minor8,473
20Jan 15, 201316.13+2.13Minor8,272
21Feb 22, 201916.13+2.13Minor8,240
22Nov 29, 201115.53+1.53Minor7,059
23Jan 25, 201015.48+1.48Minor6,959
24Dec 3, 201515.36+1.36Minor6,697
25Apr 1, 202115.21+1.21Minor6,384
26Jan 23, 201715.16+1.16Minor6,289
27May 5, 201315.15+1.15Minor6,299
28Apr 8, 201415.13+1.13Minor6,260
29Feb 4, 201615.04+1.04Minor6,163
30Apr 29, 201314.97+0.97Minor5,964
31Dec 10, 201814.97+0.97Minor5,978
32Feb 24, 202214.91+0.91Minor5,892
33Feb 6, 201014.89+0.89Minor5,868
34May 10, 202414.80+0.80Minor5,812
35Jan 20, 201914.66+0.66Minor5,574
36Sep 21, 202114.62+0.62Minor5,523
37Mar 25, 202014.30+0.30Minor5,141
38Jan 24, 201914.21+0.21Minor5,038
39Dec 29, 201814.16+0.16Minor4,981

The worst floods along the Chattooga River

For this gauge's highest crests, the other gauges on the Chattooga River that crested above flood stage within a week.

February 16, 1990: 22.63 ft here, major flooding

  • GaylesvilleAL · Feb 17, 1990 · 24.25 ft · Major · its highest

September 21, 2009: 21.19 ft here, major flooding

March 29, 1951: 21.00 ft here, major flooding

Gauges on the Chattooga River

In USGS station-number order, which runs downstream within a river basin.

Flood gauges on the Chattooga River
Summerville this gaugeGA14.022.63 ft, Feb 16, 19906
GaylesvilleAL13.024.25 ft, Feb 17, 19906

Chattooga County: every hazard · River floods across the country · Georgia

NOAA National Water Prediction Service, gauge SUMG1, retrieved October 30, 2026. Stages in feet on the gauge's own datum, not elevation. Crests are as the National Weather Service lists them; preliminary values may be revised.