Yellow Flag – Lakes being treated for invasive weeds

On Friday June 24th Clarke will be treating both Third Lake and Druce Lake for invasive weeds. They will be applying the application within the outlined treatment zones which can be found here.

After the application is applied, there will be a 5 day irrigation restriction.  If you utilize an irrigation system to draw water out of the lake to water, you will need to avoid using the pump until Thursday, June 29th  to avoid damage to lawns and other vegetation you are watering.  In accordance with the safety label, there are no other restrictions following the application.  You can utilize the lake for all your regular activities including boating, fishing and swimming  immediately following the application.

Don’t Miss the Fun!!! June 18th

The weather looks perfect for the fishing derby on Saturday morning! Grab a friend, a kid, or a stranger and come to Druce Lake beach in Mariner’s Cove. Bring your fishing pole, bait, a kayak or canoe if you have one and an appetite. Donuts in the morning and hot dogs after the derby. Please call the Village to register. $10 per 2-person team. All proceeds are donated to Save-A-Pet. Lots of fun and prizes!

Lake County Bike Path Study

LCDOT is studying the potential non-motorized improvement for a new 1.4-mile multi-use path along Washington Street between Mainsail Drive and Almond Road in the Villages of Gurnee and Third Lake, and Unincorporated Lake County. This is an opportunity to fill an identified bike path gap between Mainsail Drive and Almond Road. The project will also include a new sidewalk between Sextant Drive and Mainsail Drive on the north side of Washington Street, filling in an identified sidewalk gap.

The aim is to install a bike path on either the north side or the south side of Washington Street from Mainsail Drive to Almond Road. At this public forum will show the alignment alternatives on both the north and south sides of the road for comment. Lake County is targeting 2024 construction for this project, which is currently in Phase I (Preliminary Engineering). 

Provide Input at:

Reason for the Study

A bike path gap currently exists between Mainsail Drive and Almond Road on Washington St. A sidewalk gap also exists between Sextant Drive and Mainsail Drive on Washington St. 

The completion of this 1.4-mile gap will provide nearly seven miles of continuous bike network along Washington St. spanning from the Village of Round Lake to the Village of Gurnee. Users will be connected to many key destinations like businesses, schools, parks, forest preserves, Metra and Pace stops, and the College of Lake County as well as other bike trails like the Millennium Trail and the Des Plaines River Trail.

LCDOT works with municipal agencies and other partners to look for opportunities to connect the dots and fill the gaps in the non-motorized network. A path along this corridor was listed in Lake County’s 2040 Non-Motorized Plan that identifies opportunities to improve the viability of travel in Lake County without the need for an automobile. 

Providing Input

LCDOT created a virtual forum for you to share your ideas and questions through June 17, 2022.  Use the interactive comment map to provide an exact location of your input. All input submitted through the website goes directly to the project study team. 

Provide your input and learn more at:

Others ways to provide input on the project include: 

  • Email
  • Mailing
    Lake County Division of Transportation
    600 W. Winchester Road, Libertyville, IL 60048
  • Calling

Project Timeline

This project will span a few years of planning, coordination, and design before construction will begin. Currently, construction is scheduled to begin in 2024 dependent upon project readiness and funding availability. Ensure you stay up to date by signing up for project updates

Clarke Surveys for Druce and Third Lake

Clarke has completed the surveys for both lakes and recommends treatment for invasive plants in the outlined area of the BioBase surveys. See the surveys here.

The Village of Third Lake treats only for invasive plant species. It is important to have a healthy balance of plant growth in the lake for water quality, as a source of oxygen, to create a habitat and a food source for fish. Plants absorb excess nutrients which could cause algae blooms. The majority of the beneficial, native plants in the lakes are American pondweed and Filiform pondweed.

The invasive plants found in both lakes consist of Curly leaf pondweed and Eurasian water milfoil. The prescribed treatment will target these plants. The treatment will take place in approximately 2 weeks. Please be on the lookout for the yellow flag and check the website or Facebook page to know the exact date.

The Lake County Health Department is planning to conduct another aquatic vegetation tour this summer either late July or early August. There was a great turnout last year, so get your kayaks, canoes, paddle boards ready and join our Lake County experts. The exact date has not been scheduled at this time. Stay tuned!

Lake Surveys

Clarke will be surveying both Third and Druce Lakes today. You will see their boats slowly trolling around the lake while the sonar beneath the boat gathers plant and lake data. They are strictly collecting data today and will not be applying any chemical applications. Once the surveys are complete and we receive the results, they will be posted to the Village website.

Retention Ponds Makeover

Mariner’s Cove subdivision was built in the 1980’s.  The plan for the subdivision included retention ponds for water collection and flood control. These ponds provide both an important function for drainage as well as recreational benefits to residents.  This public area allows families and neighbors to see wildlife, admire plants and provide an area for kids to run and play. 

In the forty years since the ponds have been created, there has been little maintenance to keep the ponds healthy and beautiful.  The ponds have filled with sediment and invasive species of vegetation have choked out many of the small fish that used to thrive in the ponds.  The current depth of these ponds allows for little water capacity and the park areas flood on a regular basis.  The algae and muck have become a health and safety concern for many pets and people that visit the park and ponds. In addition to making the ponds unsightly and smelly, the dysfunctional ponds deposit warm algae infested waters into our lakes forcing numerous closures for water activities on both lakes. 

This year the Village is working with the Mariner’s Cove Homeowners Association to dredge and beautify the park and ponds.  Starting in June a settling basin will be built on the west side of the ponds and a dredger will pump sediment and water into this basin.  The basin will have silt fence and a chain link fence to keep people out and runoff in the basin. At times there will be a foul odor emanating from the dredging operation.  Weather permitting the entire project is scheduled to be completed by Sept 30th which includes the dredging, grading and grass seeding. At the completion of this phase of the project the Mariner’s Cove Homeowners Association will start working on adding additional plantings and shoreline hardening.

While this project may be inconvenient for a short time, the long-term benefits will result in a fully functioning water retention system with native plants and a beautiful area for families and neighbors to enjoy. 

If you have any questions, please contact the Village.

Click the following links to view the Engineering Plans:
Plans for Settling Basin
Bathymetries and Topo