Chattahoochee River near Cornelia
Highest listed crest 20.63 ftFlood stage 14.0 ft9 crests since 1963
The Chattahoochee River near Cornelia crested above flood stage 9 times among the 9 crests the National Weather Service lists from 1963 to 2024. The highest, 20.63 ft on October 11, 2020, was moderate flooding, 6.63 feet above flood stage. 6 other gauges on the Chattahoochee River crested above flood stage within a week of it.
The gauge
- Highest listed crest
- 20.63 ft
- October 11, 2020; 28,686 cubic feet per second
- Flood stage
- 14.0 ft
- Major flooding from 21.0 ft
- Crests at major
- 0
- 9 above flood stage
- Most recent flood crest
- January 9, 2024
- 14.22 ft, minor flooding
Flood stages
The thresholds the National Weather Service uses for this gauge today, and how many listed crests reached each.
| Action stage | 11.0 | 0 | — |
| Flood stage (minor) | 14.0 | 5 | Jan 9, 2024 |
| Moderate flood stage | 18.0 | 4 | Oct 11, 2020 |
| Major flood stage | 21.0 | 0 | — |
Every listed crest
9 crests from 1963 to 2024. Filled: at or above flood stage. Hover a crest for its date and stage.
Crests at or above flood stage, by decade
- 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.
- 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
| 1 | Oct 11, 2020 | 20.63 | +6.63 | Moderate |
| 2 | Mar 12, 1963 | 20.55 | +6.55 | Moderate |
| 3 | May 28, 1973 | 20.30 | +6.30 | Moderate |
| 4 | Aug 23, 1967 | 18.83 | +4.83 | Moderate |
| 5 | May 29, 1976 | 17.95 | +3.95 | Minor |
| 6 | Jan 27, 1996 | 16.68 | +2.68 | Minor |
| 7 | Dec 28, 2018 | 15.53 | +1.53 | Minor |
| 8 | Feb 6, 2020 | 14.29 | +0.29 | Minor |
| 9 | Jan 9, 2024 | 14.22 | +0.22 | Minor |
The worst floods along the Chattahoochee River
For this gauge's highest crests, the other gauges on the Chattahoochee River that crested above flood stage within a week.
October 11, 2020: 20.63 ft here, moderate flooding
- US 41 at AtlantaGA · Oct 11, 2020 · 20.50 ft · Major
- AtlantaGA · Oct 11, 2020 · 19.95 ft · Moderate
- GA 280 near AtlantaGA · Oct 11, 2020 · 27.46 ft · Minor
- WhitesburgGA · Oct 12, 2020 · 17.07 ft · Minor
- Highway 141 near NorcrossGA · Oct 11, 2020 · 14.01 ft · Minor
- RoswellGA · Oct 11, 2020 · 11.51 ft · Minor
March 12, 1963: 20.55 ft here, moderate flooding
- HelenGA · Mar 12, 1963 · 10.00 ft · Moderate
May 28, 1973: 20.30 ft here, moderate flooding
- HelenGA · May 28, 1973 · 7.30 ft · Minor
Gauges on the Chattahoochee River
In USGS station-number order, which runs downstream within a river basin.
| Helen | GA | 12.00 ft, Aug 23, 1967 | 2 |
| Cornelia this gauge | GA | 20.63 ft, Oct 11, 2020 | 0 |
| Highway 141 near Norcross | GA | 27.70 ft, Jan 8, 1946 | 13 |
| Roswell | GA | 11.96 ft, Sep 21, 2009 | 0 |
| Morgan Falls Dam near Roswell | GA | 827.01 ft, Sep 22, 2009 | 1 |
| US 41 at Atlanta | GA | 28.59 ft, Sep 22, 2009 | 5 |
| Atlanta | GA | 29.00 ft, Dec 10, 1919 | 13 |
| GA 280 near Atlanta | GA | 35.98 ft, Sep 22, 2009 | 3 |
| Fairburn | GA | 31.60 ft, Dec 10, 1919 | 2 |
| Whitesburg | GA | 29.74 ft, Sep 23, 2009 | 3 |
| GA 100 at Franklin | GA | 30.55 ft, Sep 24, 2009 | 1 |
| West Point | GA | 29.25 ft, Dec 10, 1919 | 14 |
| 14th Street at Columbus | AL | 55.20 ft, Mar 15, 1929 | 4 |
| W.F. George Lock and Dam | AL | 158.50 ft, Mar 17, 1929 | 0 |
| George W. Andrews Lock and Dam (USACE) | GA | 128.28 ft, Mar 18, 1929 | 1 |
Other gauges in White County
| Helen | 12.00 ft, Aug 23, 1967 | 2 |
White County: every hazard · River floods across the country · Georgia
NOAA National Water Prediction Service, gauge DCNG1, 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.