Long Lake Aquatic Invasive Plant Treatment

Long Lake Aquatic Invasive Plant Treatment this Summer and Fall

 

Long Lake Aquatic Invasive Plant Control Update

In the spring of 2024, Kitsap County contracted with AquaTechnex to conduct aquatic invasive species control work in Long Lake. Funded by a Washington State Department of Ecology grant, with matching funds from the Kitsap County Noxious Weed Control Program, the project seeks to address several aquatic invasive plant species negatively impacting the lake, and follows guidance provided by an Integrated Aquatic Vegetation Management Plan (IAVMP) developed in 2022. 

AquaTechnex conducted the first round of surveys and treatment during the summer and fall of 2024, with another round planned for spring of 2025. See below for details about treatment work conducted so far:

• 10.5 acres of Eurasian Milfoil (Myriophyllum spicatum) treated with Procellacor on Aug 1
• 14 acres of Fragrant/White Waterlily (Nymphaea odorata) treated with AquaNeat on Sep 26

Another survey will be conducted in the spring of 2025 to confirm Brazilian Elodea (Egeria densa) distribution, with treatment to follow using aquatic herbicide Sonar. The county may also pursue mechanical (diver) removal of Curly leaf pondweed (Potamogeton crispus) depending on survey results.

Prior to the remaining treatments, notice will be sent by mail to all residents within a quarter mile of Long Lake, which provides more detail on the species being treated and the chemicals being used. AquaTechnex will posts signs in treatment areas within 48 hours of treatment. The signs will describe any water use restrictions or advisories. 

Landowner Workshop

Kitsap County will partner with AquaTechnex to hold a landowner workshop in the spring of 2025. The workshop will cover best management practices on aquatic invasive plant control for lakefront landowners, and highlight the work performed by AquaTechnex so far. Another notice will be circulated when a date and location are determined.  

For more information about the management of invasive species on Long Lake in previous years, visit the Long Lake Management District website. Please note, the Long Lake Management District is not currently active. 

Sign up here to receive email or text updates about the project.