Hydrological Unit: Machias River
| HUC | Name |
|---|---|
| 010100040801 | South Branch Machias River |
| 010100040802 | Upper Machias River |
| 010100040803 | McConnell Brook |
| 010100040804 | Carry Brook |
| 010100040805 | Greenlaw Stream |
| 010100040806 | Lower Machias River |
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