| Impact ID | 6998 |
| Impact Type | Infrastructure |
| Study Type | Observational |
| Study Location | Field |
| Impact Description | In Washington State, local and state government and lake residents spend thousands of dollars every year to manage Egeria densa infestations. The cost of the control project in Silver Lake, Cowlitz County is over one million dollars. |
| Reference | 42092 |
| Cost | One million dollars |
| Location | |