Big Creek below Hog Wallow at Roswell
Highest listed crest 15.41 ftFlood stage 10.0 ft8 crests since 2004
The Big Creek below Hog Wallow at Roswell crested above flood stage 7 times among the 8 crests the National Weather Service lists from 2004 to 2024. The highest, 15.41 ft on September 22, 2009, was moderate flooding, 5.41 feet above flood stage. 2 other gauges on the Big Creek crested above flood stage within a week of it, 1 at its own highest listed crest.
The gauge
- Highest listed crest
- 15.41 ft
- September 22, 2009; 6,262 cubic feet per second
- Flood stage
- 10.0 ft
- Major flooding from 17.0 ft
- Crests at major
- 0
- 7 above flood stage
- Most recent flood crest
- September 27, 2024
- 12.41 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 | 9.0 | 0 | — |
| Flood stage (minor) | 10.0 | 6 | Sep 27, 2024 |
| Moderate flood stage | 14.0 | 1 | Sep 22, 2009 |
| Major flood stage | 17.0 | 0 | — |
Every listed crest
8 crests from 2004 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 | Sep 22, 2009 | 15.41 | +5.41 | Moderate |
| 2 | Sep 17, 2004 | 12.50 | +2.50 | Minor |
| 3 | Sep 27, 2024 | 12.41 | +2.41 | Minor |
| 4 | Dec 29, 2018 | 11.38 | +1.38 | Minor |
| 5 | Oct 11, 2020 | 11.21 | +1.21 | Minor |
| 6 | Feb 7, 2020 | 11.08 | +1.08 | Minor |
| 7 | Nov 14, 2018 | 10.25 | +0.25 | Minor |
| 8 | Jul 17, 2005 | 8.14 | −1.86 | Below flood stage |
The worst floods along the Big Creek
For this gauge's highest crests, the other gauges on the Big Creek that crested above flood stage within a week.
September 22, 2009: 15.41 ft here, moderate flooding
- AlpharettaGA · Sep 22, 2009 · 12.50 ft · Moderate
- GA 9 near CummingGA · Sep 22, 2009 · 10.43 ft · Minor · its highest
September 17, 2004: 12.50 ft here, minor flooding
- AlpharettaGA · Sep 17, 2004 · 11.93 ft · Moderate
September 27, 2024: 12.41 ft here, minor flooding
- AlpharettaGA · Sep 27, 2024 · 10.77 ft · Minor
- GA 9 near CummingGA · Sep 27, 2024 · 8.47 ft · Minor
Gauges on the Big Creek
In USGS station-number order, which runs downstream within a river basin.
| GA 9 near Cumming | GA | 10.43 ft, Sep 22, 2009 | 0 |
| Alpharetta | GA | 13.05 ft, Feb 3, 1982 | 1 |
| Hog Wallow at Roswell this gauge | GA | 15.41 ft, Sep 22, 2009 | 0 |
Other gauges in Fulton County
| Alpharetta | 13.05 ft, Feb 3, 1982 | 1 |
| Roswell | 11.96 ft, Sep 21, 2009 | 0 |
| Atlanta | 29.00 ft, Dec 10, 1919 | 13 |
| GA 280 near Atlanta | 35.98 ft, Sep 22, 2009 | 3 |
| Highway 141 near Norcross | 27.70 ft, Jan 8, 1946 | 13 |
| Morgan Falls Dam near Roswell | 827.01 ft, Sep 22, 2009 | 1 |
| Rickenbacker Drive at Atlanta | 15.50 ft, Dec 1, 1973 | 8 |
| West Wesley Road at Atlanta | 25.46 ft, Sep 22, 2009 | 3 |
| Atlanta | 25.80 ft, Dec 9, 1919 | 9 |
| Jackson Parkway at Atlanta | 18.03 ft, Mar 13, 1975 | 0 |
| Atlanta | 15.95 ft, Mar 13, 2019 | 0 |
| Forrest Park Road at Atlanta | 16.62 ft, Sep 19, 2009 | 0 |
| Great Southwest Parkway near Atlanta | 27.89 ft, Sep 22, 2009 | 1 |
| Defoors Ferry Road at Atlanta | 23.61 ft, Sep 22, 2009 | 1 |
Fulton County: every hazard · River floods across the country · Georgia
NOAA National Water Prediction Service, gauge RWSG1, 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.