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Flat River
| States | Michigan |
| Length | 71.2 miles |
| Watershed Length* | 121 miles |
| Mouth | Grand River ⤏ Lake Michigan |
| GNIS | 626143 |
Tributaries
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| Name | Distance from Mouth (miles) | Length (miles) | Watershed Length (miles) |
|---|---|---|---|
| Cooper Creek | 42 | 8 | 8 |
| Dickerson Creek | 27 | 27 | 27 |
| Wabasis Creek | 29 | 14 | 14 |
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* Note: Watershed is mostly rivers/streams 15+ miles in length.
Data from United States Geological Survey