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Monongahela River
| States | Pennsylvania (93 mi), West Virginia (38 mi) |
| Length | 130.4 miles |
| Watershed Length* | 1,937 miles |
| Mouth | Ohio River ⤏ Gulf of Mexico |
| GNIS | 1209053 |
Tributaries
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| Name | Distance from Mouth (miles) | Length (miles) | Watershed Length (miles) |
|---|---|---|---|
| Buffalo Creek | 127 | 30 | 30 |
| Cheat River | 91 | 78 | 424 |
| Deckers Creek | 103 | 25 | 25 |
| Dunlap Creek | 57 | 18 | 18 |
| Georges Creek | 86 | 18 | 18 |
| Muddy Creek | 74 | 16 | 16 |
| Peters Creek | 20 | 17 | 17 |
| Redstone Creek | 56 | 28 | 28 |
| Tenmile Creek | 66 | 37 | 83 |
| Turtle Creek | 12 | 20 | 42 |
| Tygart Valley River | 130 | 135 | 399 |
| West Fork River | 130 | 104 | 261 |
| Whiteday Creek | 117 | 20 | 20 |
| Whiteley Creek | 81 | 23 | 23 |
| Youghiogheny River | 16 | 134 | 404 |
* Note: Watershed is mostly rivers/streams 15+ miles in length.
Data from United States Geological Survey