INTEGRATED AQUATIC VEGETATION MANAGEMENT PLAN
Snohomish County Surface Water Management and the Lake Roesiger Community and Boat Club partnered together to develop an Integrated Aquatic Vegetation Management Plan (IAVMP) for Lake Roesiger. The plan focuses on long-term control of key invasive plants and was developed with in-depth community engagement.
In fall 2021, the plan was approved by 64% of all voters which included lake users that do not live near the lake. Approval was 70% among lake area residents and 74% among Lake Roesiger Community and Boat Club members. The Washington Department of Ecology approved the plan in February of 2022.
Lake Roesiger plant issues.
The lake has three invasive species of concern in the lake basin - Eurasian watermilfoil, fragrant waterlily and narrow-leaved arrowhead. There are also three invasive species found on the lake shoreline - yellow flag iris, purple loosestrife and Japanese knotweed
IAVMP Committee.
The project goal was to provide the community with a road map which will help native plants, ecosystem health, and lake recreation. The plan laid out all options with associated costs and benefits so the community could decide on the best path forward.
Survey Outreach Efforts.
The Lake Roesiger IAVMP plan was drafted and included four different scenarios for plant control. Tetra Tech and ESA provided an online presentation to explain the plan and the potential management options. The entire lake community was invited via mail, email, and social media postings to view the presentation and the draft plan and provide feedback via an online survey.