Long Lake Lake Management District 2016

September 7, 2018

Treatment Program

The 2018 treatment program is a set-up for the 2019 lake management activities. All chemicals used in these treatments are considered safe for humans, pets and wildlife at the doses and area coverage proposed. However, due to the perceptions of certain chemicals (e.g. glyphosate), the district has drastically limited their usage as described in bold below.

Specifically, aquatic plant treatment will be conducted as described below:

    • The goal for aquatic plant management is to reduce the coverage and density of the three invasive non-native species within the lake (Eurasian water milfoil, Brazilian elodea, and white waterlily) while promoting the enhancement of aquatic habitat by encouraging native rooted plants to reestablish as they were doing in the 2006-2010 management program. This will improve the overall aquatic environment including fisheries, while enhancing recreational opportunities.
    • To do this there will be different areas (within a depth of 12 feet) of the lake treated each year with some areas receiving more than one treatment every five years and others only one treatment.
    • In 2018, the treatment is designed to stress plants within the targeted 16.5 acres of invasive non-native plants that also include some excessively dense native plants, mainly pondweed. This will be a set-up treatment for the 2019 plan to help provide long-term control. This treatment as in years past will start with a contact herbicide dibromide to reduce the effective overwintering of the plant within the treatment area so that the 2019 treatment will provide greater effective control. Also, 5 acres of  the southern end of the lake will be treated with a low dose glyphosate in order to control the white lily reducing its density by at least 60% within a shoreline area. While deemed safe for usage, glyphosate is only planned for the one treatment in 2018. No future use is intended to address the invasive species through 2022.
    • All other treatments of aquatic plants in 2019-2022 will be a combo of fluridone (for Eurasian watermilfoil and Brazilian elodea), triclopyr (for white waterlily) and dibromide. With fluridone to be the dominant herbicide used as in the 2006-2010 program.
    • In 2019, volunteer citizen training will begin for direct actions to be taken by lake shoreline residents to help refine and improve lake conditions. This will including cutting/racking for lilies and some other plants, and bottom barrier installation for all plants. This will allow enhance recreation in specific areas without herbicides.

The treatment program will control cyanobacteria (Blue-greens) blooms that can lead to HABs (Harmful Algal Blooms) by reducing the available phosphorus in the lake. As in the past, alum will be applied to the lake to inactivate the available phosphorus and prevent the excess production for cyanobacteria as described below.

    • In the fall of 2018 a low dose alum treatment will be applied to the lake to strip available phosphorus out of the water column and to inactivate some of the sediment phosphorus within the lake.
    • This will be a set-up treatment to be followed up with a spring 2019 alum application to further inactivate sediment phosphorus and to remove lake water column phosphorus that was brought to the lake via watershed in the winter and early spring runoff.
    • Another alum treatment(s) will occur in 2020-2022 depending upon the water quality data collected and the need to further suppress available phosphorus from simulating HAB occurrences.  


As part of the volunteer citizen training for plant management, we will start in 2019 to train and inform shoreline residents, as well as interested watershed residents, what they can do to reduce the impact of nutrient loading to the lake, with the emphasis on phosphorus runoff reduction. This will include:

    • Lake and shoreline reduced phosphorus friendly landscaping,
    • Waterfowl discouragement (remember three geese or three ducks produce the same amount of phosphorus and nitrogen as one human),
    • Impervious area management including biofiltration via landscaping. 

If you have any questions, please contact Eric Baker, Kitsap County Policy Manager at ebaker@co.kitsap.wa.us or (360) 337-4495. ___________________________________________________________________________________________________________

October 2017

Long Lake Management District No. 3 Proposal – PASSES

After tabulation of the ballots submitted by property owners through February 10 2017, the proposal to form Long Lake Management District No. 3 has passed with a 55.5% yes vote (simple majority was required).

With Board of Commissioner approval of the District on June 12, 2017 and the assessment roll on August 14, 2017, Kitsap County has put the maintenance activities out to competitive bid. Through a request for proposal process, members of Kitsap County Stormwater, Kitsap Public Health, the Noxious Weed Board and Commissioners Office, will review submittals and select a consultant to begin lake activities in the near future.

To ensure good coordination between the residents within the District and the contractor, Kitsap will be forming an advisory committee made up of local residents, the departments listed above and the contractor. This will allow a quarterly assessment of any issues that may arise during the maintenance activities. If you reside within the district and have interest in serving on such a committee, please contact Eric Baker, Policy Manager, at the information below.

If you have any questions regarding the proposal, the ballot tabulation or next steps. Please contact Eric Baker at (360) 337-4495 or ebaker@co.kitsap.wa.us.

Long Lake has been suffering for years with significant water quality issues that have promoted the growth of invasive aquatic plants and toxic algae blooms. These issues come from past land use practices on shoreline and upland lots, surrounding soil conditions and natural lake processes. These issues have impacted use of the lake for recreation and created frequent public health hazards. These issues have been addressed in the past through state-funded management activities to reduce the accessibility of phosphorous and other nutrients within Long Lake.

To fund future management activities, private funding will be necessary. To this end, the community and Kitsap County is proposing a lake management district for properties surrounding Long Lake. Through annual assessments of $450, properties within the proposed District boundary may fund specific lake management activities established by an Integrated/Adaptive Lake Management Plan.

More information regarding the proposed maintenance activities, district boundary and proposed assessments can be found in the documents linked to the right.

For information regarding the previous 2014 lake management district proposal, please visit
Lake Management District for Long Lake (2014)

If you have any question regarding the district proposal, please contact Eric Baker at (360) 337-4495 or ebaker@co.kitsap.wa.us.