| Impact ID | 8056 |
| Impact Type | Competition |
| Study Type | Anecdotal |
| Study Location | N/A |
| Impact Description | Iris pseudacorus (yellow iris) expanded along 1300 miles of irrigation canals and laterals near Flathead Lake in northwestern Montana. |
| Reference | 24520 |
| Cost | |
| Location | Flathead Lake, Montana, USA |