About this river
Great Seneca Creek is a 7.1 mile stream near Boomerang Boat Tours. Streamflow is measured at the USGS gauge Seneca Creek at Dawsonville, MD (site 01645000). The National Hydrography Dataset places it at stream order 4. Reach geometry comes from the USGS National Hydrography Dataset.
Typical flow by month
1930 to 2026
Great Seneca Creek typically runs highest in March, at a median 122 cfs, and lowest in September, at 41 cfs. The highest flow on record for any single day is 9,900 cfs, in 1972.
| Month | Typical (cfs) | Usual range (cfs) | Relative level |
|---|---|---|---|
| January | 92 | 62 to 141 | |
| February | 109 | 76 to 160 | |
| March | 122 | 89 to 178 | |
| April | 117 | 85 to 168 | |
| May | 96 | 69 to 150 | |
| June | 73 | 52 to 112 | |
| July | 56 | 36 to 86 | |
| August | 48 | 29 to 77 | |
| September | 41 | 28 to 66 | |
| October | 44 | 29 to 72 | |
| November | 56 | 41 to 89 | |
| December | 78 | 51 to 128 |
Typical is the median of each month’s daily median values, and the usual range runs from the median 25th to the median 75th percentile, across about 96 years of record. Statistics published by the US Geological Survey for Seneca Creek at Dawsonville, MD (site 01645000). Conditions on any given day can fall well outside the usual range. Check the current reading before you go.
Embed this gauge on your site
Paste this snippet anywhere, an outfitter page, a club site, a trip report, to show Great Seneca Creek's live streamflow, water level and 7-day trend. It reads the USGS gauge directly, updates itself, and links back here.
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