| Impact ID | 7619 |
| Impact Type | Navigation |
| Study Type | Anecdotal |
| Study Location | N/A |
| Impact Description | Thick mats of Salvinia molesta prevent the passage of large diesel-powered boats and a single layer of plants is a major obstacle to paddle-powered canoes. |
| Reference | 28408 |
| Great Lakes Region | No |
| Cost | |
| Location | |
