TidalMapChattahoochee River below Morgan Falls Dam, 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 02335815 sits on the Chattahoochee River and reads everything draining 1,370 square miles of the Upper Chattahoochee basin. Its datum sits 12 feet below sea level NAVD88. Daily flow has been on record here since 2001, 26 years of it.
Where this gauge sits in the drainage
Chattahoochee River at Morgan Falls Dam, GA sits immediately upstream, so dam releases rather than rainfall set the flow here. Six gauged sites sit upstream of here. The closest is Chattahoochee River above Roswell, GA, reading 1,220 square miles. This gauge adds the 150 square miles that drain in between. Downstream the next reading comes from Chatt River at Powers Fy and I-285 near Atlanta, GA at 1,420 square miles, so what passes this gauge is about 96% of the water measured there. Water passing here goes on to Chattahoochee River at US 41, at Atlanta, GA, Chattahoochee River at Atlanta, GA and Chattahoochee River at GA 280, near Atlanta, GA.
Normal flows here
The Chattahoochee River runs a median of 1,555 cfs at this gauge across 26 years of record. March is the fullest month at a median 2,050 cfs, and September the leanest at 1,345 cfs. The highest daily mean on record is 21,600 cfs in 2009, and the lowest is 630 cfs in 2001.
| Month | Median flow | Share of annual median |
|---|---|---|
| Jan | 1,560 cfs | 100% |
| Feb | 1,750 cfs | 113% |
| Mar | 2,050 cfs | 132% |
| Apr | 1,805 cfs | 116% |
| May | 1,990 cfs | 128% |
| Jun | 1,545 cfs | 99% |
| Jul | 1,480 cfs | 95% |
| Aug | 1,380 cfs | 89% |
| Sep | 1,345 cfs | 86% |
| Oct | 1,360 cfs | 87% |
| Nov | 1,550 cfs | 100% |
| Dec | 1,460 cfs | 94% |
Medians from the USGS daily-statistics record, 2001 to 2026. A month at 100% is running at its own long-term median.
Flood stages and record crests
The Chattahoochee River reaches flood stage at this gauge at 821 feet. NWS starts watching it at 819 feet. The highest crest on record is 827 feet, in September 2009.
| Category | Gage height |
|---|---|
| Action | 819 ft |
| Minor flooding | 821 ft |
| Moderate flooding | 823 ft |
| Major flooding | 826 ft |
| When | Crest |
|---|---|
| September 2009 | 827 ft |
| September 2004 | 824.7 ft |
| September 2009 | 822.6 ft |
| March 2003 | 820.9 ft |
| October 2009 | 820.6 ft |
Flood categories and crest history from the NOAA National Water Prediction Service, gauge MGFG1. Stages are gage height, not depth. Not for navigation.
Dams near this gauge
The Army Corps' Morgan Falls Dam sits 1 mile from this gauge and its releases set what this gauge reads. The Corps publishes no release schedule for this project; its last observed release and elevations load below.
- Morgan Falls Dam 1 mile
- Buford Dam 22 miles
- Allatoona Dam 24 miles
Nearby river gauges
- Willeo Creek at GA 120, near Roswell, GA
- Big Creek below Hog Wallow Creek at Roswell, GA
- Sope Creek near Marietta, GA
- Sewell Mill Creek at GA 120, near Marietta, GA
- Chattahoochee River above Roswell, GA
- Nancy Creek at Johnson Ferry Rd, at Chamblee, GA
- Chatt River at Powers Fy and I-285 near Atlanta, GA
- Nancy Creek at Rickenbacker Drive, at Atlanta, GA
- Rottenwood Creek at Interstate N Pkwy, near Smyrna, GA
- Crooked Creek near Norcross, GA
- Chattahoochee River at US 41, at Atlanta, GA
- Chattahoochee River at Atlanta, GA
Live streamflow and gage height: USGS gauge 02335815. Percentile context computed against the gauge's period of record. Not for navigation.
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