About this river
Flatrock River is a 2.7 mile river near Blue's Canoe Livery in Indiana. Streamflow is measured at the USGS gauge Flatrock River at Columbus, IN (site 03363900). The National Hydrography Dataset places it at stream order 9. Reach geometry comes from the USGS National Hydrography Dataset.
Typical flow by month
1968 to 2026
Flatrock River typically runs highest in March, at a median 699 cfs, and lowest in September, at 75 cfs. The highest flow on record for any single day is 24,700 cfs, in 2008.
| Month | Typical (cfs) | Usual range (cfs) | Relative level |
|---|---|---|---|
| January | 455 | 265 to 943 | |
| February | 543 | 347 to 988 | |
| March | 699 | 429 to 1,150 | |
| April | 669 | 435 to 1,185 | |
| May | 556 | 363 to 951 | |
| June | 401 | 234 to 710 | |
| July | 220 | 139 to 413 | |
| August | 123 | 72 to 201 | |
| September | 75 | 48 to 138 | |
| October | 79 | 48 to 180 | |
| November | 160 | 77 to 393 | |
| December | 378 | 147 to 789 |
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 58 years of record. Statistics published by the US Geological Survey for Flatrock River at Columbus, IN (site 03363900). Conditions on any given day can fall well outside the usual range. Check the current reading before you go.
Boat access nearby
2 mapped launches sit in the mapped area of Flatrock River, all of them public access. Ramp data comes from the USGS national boat-ramp inventory.
- ColumbusFlatrock RiverPublic
- Mill Race ParkDriftwood RiverPublic
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Paste this snippet anywhere, an outfitter page, a club site, a trip report, to show Flatrock River'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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