TidalMapBig Creek at GA 9, near Cumming, GA Water Level Today
NWS river forecast
| When | Stage | Flow |
|---|
Forecast from the NOAA National Water Prediction Service. Issued a few times a day and only while a forecast is active. Not for navigation.
Last 30 days
About this gauge
USGS gauge 02335580 sits on Big Creek and reads everything draining 37 square miles of the Upper Chattahoochee basin. Its datum sits 1,008 feet above sea level NAVD88. Daily flow is on record here from 2008 to 2024, 17 years in all.
Where this gauge sits in the drainage
No gauged site sits above this one on the mainstem, so this is the first published reading on the river. Downstream the next reading comes from Big Creek near Alpharetta, GA at 72 square miles, so what passes this gauge is about 52% of the water measured there. Water passing here goes on to Big Creek below Hog Wallow Creek at Roswell, GA, Chattahoochee River below Morgan Falls Dam, GA and Chatt River at Powers Fy and I-285 near Atlanta, GA.
Normal flows here
Big Creek runs a median of 41 cfs at this gauge across 17 years of record. March is the fullest month at a median 69 cfs, and September the leanest at 22 cfs. The highest daily mean on record is 2,690 cfs in 2009, and the lowest is 6.7 cfs in 2008.
| Month | Median flow | Share of annual median |
|---|---|---|
| Jan | 56 cfs | 137% |
| Feb | 66 cfs | 161% |
| Mar | 69 cfs | 168% |
| Apr | 59 cfs | 144% |
| May | 45 cfs | 110% |
| Jun | 35 cfs | 85% |
| Jul | 32 cfs | 78% |
| Aug | 26 cfs | 63% |
| Sep | 22 cfs | 54% |
| Oct | 22 cfs | 54% |
| Nov | 31 cfs | 76% |
| Dec | 52 cfs | 127% |
Medians from the USGS daily-statistics record, 2008 to 2024. A month at 100% is running at its own long-term median. USGS stopped publishing a daily flow record at this gauge, so these are historical norms, not a baseline for current readings.
Flood stages and record crests
Big Creek reaches flood stage at this gauge at 6 feet. NWS starts watching it at 4 feet. The highest crest on record is 10.4 feet, in September 2009.
| Category | Gage height |
|---|---|
| Action | 4 ft |
| Minor flooding | 6 ft |
| Moderate flooding | 12 ft |
| Major flooding | 15 ft |
| When | Crest |
|---|---|
| September 2009 | 10.4 ft |
| August 2013 | 9.2 ft |
| October 2020 | 9 ft |
| January 2015 | 8.9 ft |
| January 2023 | 8.8 ft |
Flood categories and crest history from the NOAA National Water Prediction Service, gauge CMGG1. Stages are gage height, not depth. Not for navigation.
Dams near this gauge
The Army Corps' Buford Dam is 8 miles from this gauge. The Corps publishes no release schedule for this project; its last observed release and elevations load below.
- Buford Dam 8 miles
- Morgan Falls Dam 16 miles
Nearby river gauges
- Big Creek near Alpharetta, GA
- Dick Creek at Old Atlanta Rd, near Suwanee, GA
- Chattahoochee River near Buford, GA
- Chattahoochee River at Buford Dam, near Buford, GA
- Chattahoochee River Buford Dam near Buford, GA
- Settingdown Creek near Ball Ground, GA
- Chattahoochee River 0.76 Mi US Mcginnis Fy Suwanee GA
- Richland Creek at Suwanee Dam Road, near Buford,ga
- Level Creek at Suwanee Dam Road, near Suwanee, GA
- Chattahoochee River near Norcross, GA
- Suwanee Creek at Suwanee, GA
- Big Creek below Hog Wallow Creek at Roswell, GA
Live streamflow and gage height: USGS gauge 02335580. Percentile context computed against the gauge's period of record. Not for navigation.
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