Roesiger Invasive Aquatic Plant Control
Implementing the Plan - Work to begin in 2023
The table below shows each of the plan elements and the actions being taken in 2023. All work will be managed by Snohomish County under the guidance of the Lake Roesiger Invasive Plant Advisory Committee (currently being formed). To stay up-to-date on the project, sign up to receive email updates.
5 year goal: Eradicate
Eurasian watermilfoil is currently in scattered locations in each of the three basins. The low densities are thanks to over two decades of diver surveys and hand-pulling. While these efforts have helped, they have not been consistent enough to eradicate this plant.
Fragrant Waterlily Control
5 year goal: North and South Basins - Eradicate
Middle Basin - 40 to 50% Reduction
Fragrant waterlily currently covers approximately 0.7 acres in the north basin, 0.6 in the south basin and 28.9 in the middle basin.
Invasive Species Prevention
5 year goal: Prevent new introductions of invasive aquatic species
Lake Roesiger is a popular destination for boaters putting it at high risk for new invasive plant and animals to be introduced to the lake. Users leaving the lake can also spread Roesiger invasive species to other lakes. Outreach to boat users on how to Clean, Drain and Dry their boat is the best method to prevent the spread of invasive species. aquatic plants and animals into the lake
Shoreline Invasive Species
5 year goal: Prevent further spread and reduce coverage
Invasive shoreline plants at Lake Roesiger include invasive knotweed, purple loosestrife and yellow flag iris.
5 year goal: prevent further spread and reduce coverage (initial target of 20% per year that would be scaled based on funding)
Project Success Monitoring
5 year goal: Track the effectiveness of the project in meeting the project goals
5 year goal: Ensure community members are kept up-to-date on project actions and outcomes