TidalMapSeneca Creek at Dawsonville, MD 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 01645000 sits on Seneca Creek and reads everything draining 101 square miles of the Middle Potomac-Catoctin basin. Its datum sits 213 feet above sea level NAVD88. Daily flow has been on record here since 1930, 96 years of it.
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 Potomac River near Wash, Dc Little Falls Pump Sta at 11,560 square miles, so what passes this gauge is about 1% of the water measured there.
Normal flows here
Seneca Creek runs a median of 76 cfs at this gauge across 96 years of record. March is the fullest month at a median 122 cfs, and September the leanest at 41 cfs. The highest daily mean on record is 9,900 cfs in 1972, and the lowest is 1.8 cfs in 1966.
| Month | Median flow | Share of annual median |
|---|---|---|
| Jan | 92 cfs | 121% |
| Feb | 109 cfs | 143% |
| Mar | 122 cfs | 161% |
| Apr | 117 cfs | 154% |
| May | 96 cfs | 126% |
| Jun | 74 cfs | 97% |
| Jul | 56 cfs | 74% |
| Aug | 48 cfs | 63% |
| Sep | 41 cfs | 54% |
| Oct | 44 cfs | 58% |
| Nov | 56 cfs | 74% |
| Dec | 78 cfs | 103% |
Medians from the USGS daily-statistics record, 1930 to 2026. A month at 100% is running at its own long-term median.
Flood stages and record crests
Seneca Creek reaches flood stage at this gauge at 7.5 feet. NWS starts watching it at 5 feet. The highest crest on record is 16.4 feet, in June 1972.
| Category | Gage height |
|---|---|
| Action | 5 ft |
| Minor flooding | 7.5 ft |
| Moderate flooding | 11 ft |
| Major flooding | 16 ft |
| When | Crest |
|---|---|
| June 1972 | 16.4 ft |
| September 1971 | 16.3 ft |
| September 2011 | 15.8 ft |
| September 1979 | 12.7 ft |
| September 1975 | 12.7 ft |
Flood categories and crest history from the NOAA National Water Prediction Service, gauge DAWM2. Stages are gage height, not depth. Not for navigation.
Nearby river gauges
- Tenmile Creek near Boyds, MD
- Cabin Branch near Boyds, MD
- Little Seneca Creek Tributary near Germantown, MD
- Tenmile Creek near Clarksburg, MD
- Broad Run near Leesburg, VA
- Little Seneca Creek Tributary at Brink, MD
- Little Seneca Creek Tributary near Clarksburg, MD
- Potomac River at Edwards Ferry near Poolesville,md
- Soper Branch at Hyattstown, MD
- Monocacy River near Dickerson, MD
- Difficult Run near Great Falls, VA
- Bennett Creek at Park Mills, MD
Live streamflow and gage height: USGS gauge 01645000. Percentile context computed against the gauge's period of record. Not for navigation.
Open Seneca Creek at Dawsonville, MD on the live chart →
River pins, dam-release overlays and wadability lines live in the app, start a free TidalMap trial.