Tributary Water Quality Monitoring Report - 2018

posted Dec 8, 2018, 3:32 PM by Lake Iroquois Association

Read the recently released Tributary Water Quality Monitoring Report for Lake Iroquois.  


posted Nov 1, 2018, 5:22 PM by Lake Iroquois Association   [ updated Nov 1, 2018, 5:23 PM ]

Press Release: October 19, 2018

Contacts: Chris Conant, President, Lake Iroquois Association 802-316-6714

Jamie Carroll, Secretary, Lake Iroquois Association 802-989-9439


Recently the Lake Iroquois Association (LIA) was notified of the denial of a permit application to treat Lake Iroquois with herbicide Sonar to significantly reduce the prevalence of the invasive species Eurasian Water Milfoil (EWM). LIA partnered with the town of Williston on this application. The Vermont Department of Environmental Conservation (VT DEC) considered this permit application for nearly two-years. This was proposed to prevent further native species loss and reduce the impact on recreational uses of the lake. In 2014 LIA contracted with Northeast Aquatics to conduct an aquatic plant survey prior to the permit application. That survey found that 70.7 acres of the lake was infested by Eurasian Water Milfoil.  This is 67% of the lake’s littoral zone (area of a lake in which aquatic plants grow) and suggested that an additional 33 acres of milfoil colonization is possible.  EWM has become the dominant aquatic plant in the lake. Another survey in 2017 found similar results. Since applying for the Sonar treatment LIA has conducted Diver Assisted Suction Harvesting (DASH) and installed Benthic Barriers in the lake to control the EWM in the most heavily infested areas of the lake.

Following nearly a decade of work to limit nutrient flows into the lake by stream remediation projects, implementing a greeter program at the state fishing access to prevent further invasives from entering the lake, instituting many educational programs including publication of a lakeshore property owners manual, and working with property owners to create shoreline riparian buffers, LIA embarked on the EWM control program at the request of lake users. The plant survey was commissioned in 2014 and in 2015/2016 LIA met several times with VT DEC staff, as well with local town Selectboards and Conservations Commissions, representatives from other lake associations, and Lake Iroquois property owners and users to discuss control options. This culminated in applications for a DASH permit in early 2016 and the application for the Sonar permit in November 2016. Sonar has been used safely in Vermont lakes since 2000 to control EWM and has been widely used in other states to control this invasive species, including in drinking water reservoirs.  The proposed treatment concentrations were well below EPA guidelines for drinking water.  

The Lake Iroquois Association has worked tirelessly in this effort over many years to research best practices for controlling EWM. The application for the Sonar permit included a 5-year plan for management which included continued use of both DASH and Benthic mats (bottom barriers) which already were in use at the lake.  Diverse funding sources, state grants, municipal contributions, and private funds help ensure the continued success of the efforts.  The goal of the use of  Sonar was not eradication but was intended to reduce the EWM enough to allow the other control methods to be effective and sustainable.

LIA has used Benthic barriers in a channel near the state fishing access to limit the spread of this invasive species. The use of Benthic Barriers is not benign because they kill all plants under them and affect fish spawning.  Therefore they can only be used in a very limited area, for example, to keep a boat channel open, but are not a solution for control of EWM in a wider area of any lake.  In 2016 and 2018 LIA hired AB Aquatics to conduct Diver-Assisted Suction Harvesting (DASH) of milfoil on Lake Iroquois. DASH can cause fragmentation, harvest non-target species, and disrupt the lake bottom. Again, this is a method that is part of an integrated EWM management plan but also is slow, and as noted can be disruptive to native species, as well as being very expensive.  The LIA plan was and continues to be a control program that combines these various methods, including the judicious use of herbicide at lowest effective concentrations, in such a way that this invasive is reduced and controlled so that native species can repopulate and flourish thereby enhancing the biodiversity and health of the lake ecosystem.

At the same time, the LIA continues its many other activities aimed at enhancing and maintaining the health of Lake Iroquois and its surrounding ecosystem.  These include our greeter program in which boats entering and leaving the lake are checked for invasives and cleaned at our boat wash station. Other efforts are our several stream remediation projects to reduce runoff along the west shore,  which are showing a significant reduction of nutrients and sediment entering the lake; ongoing efforts to inform and support lakeshore property owners and lake users in best management practices; help with creation of no-mow zones and riparian buffers to prevent nutrient runoff into the lake; continued monitoring and regular sampling and data collection to support evidence-based water quality activities. All of these many successful projects, the ongoing education and outreach efforts, and the 40+ years of water quality data collection have been done by dedicated volunteers, volunteers who continue to commit to the hard work of protecting and enhancing the water quality and health of Lake Iroquois and sharing their knowledge and experiences with other lake associations in the state in order to collectively protect the health of Vermont’s valuable water resources.

LIA remains committed to a program to control EWM to ensure the rich native aquatic plant community in the lake and, to eliminate the monoculture caused by the EWM infestation, so that appropriate recreational uses of the lake can continue and the health of the lake is protected. The association will continue to research ways to control EWM, to consult with other lake associations, lake users and property owners, municipalities, and the state to develop best practices and to work with all stakeholders to enhance the health of the Lake Iroquois ecosystem. 

The initial application (2240-ANC), denial, and replies to public comments are available from this web directory: 

For more information, go to our Facebook page:, check out our website: or email us at

Latest LIA Newsletter- Read your copy today

posted Jul 19, 2018, 5:44 PM by Lake Iroquois Association   [ updated Jul 19, 2018, 5:47 PM ]

A new guide for lakeshore property owners

posted Jul 19, 2018, 5:39 PM by Lake Iroquois Association

The Vermont Department of Environmental Conservation has released a new guide for lakeshore property owners: Sharing the Edge: A Guide to Lakeshore Property Owners in Vermont.  

This guide covers permitting to describing the ideal shoreline.  It is a great resource for lifelong property owners to those that have newly acquired a place by the water.  

August 14: The Vermont Loon Conservation Project

posted Jul 19, 2018, 5:29 PM by Lake Iroquois Association

6:30 p.m. Carpenter -Carse Library, Hinesburg

Find our more about the Lake Iroquois loons and the project Vermont loon project.  In this program, Vermont Center for Ecostudies (VCE) biologist, Eric Hanson, will discuss the amazing recovery of loons in Vermont over the past 30 years, the threats that they face, and the conservation actions that have brought them back, including capture and rescue stories. We’ll also explore their fascinating behaviors and natural history, including new research on how loons find a territory, what is being conveyed in the yodel call, and new findings on their migration pathways. The VLCP is a program of the Vermont Center for Ecostudies (VCE) and the Vermont Fish and Wildlife Department.

View the announcement attached below

LIA Garden Tour - Sat July 28th - Free and open to all

posted Jul 5, 2018, 6:55 PM by Lake Iroquois Association   [ updated Jul 5, 2018, 6:56 PM ]

LIA Garden Tour

Plant Sale & Picnic

Saturday, July 28th

Free and open to all

3-5 PM “Garden Stroll down Pineshore Drive”

Lauren Jenness, from the Vermont Dept. of Environmental Conservation, will lead a tour of several properties that are Vermont Lake-friendly. LIA’s own Shannon Kelly will discuss the Ecosystem Restoration Project. Meet us to start the tour at 3 PM at the turn on Pine Shore Road.

Look for “LIA Garden Tour” signs by road and by shore.

5-7 PM Picnic- 129 Wood Run - Randy Kay & Marj Meyer camp

Look for “LIA Garden Tour” signs by road and by shore.

Picnic Food - Beer, wine, water, lemonade, hot dogs, hamburgers,veggie burgers, and cake. Feel free to bring sides and salads.They are welcome but not necessary.

Rodney Putnam, singer and guitarist, will be our special entertainment at the picnic

Plant Sale - Preorder native plants to pick up at the picnic and save 10% or select plants at the picnic for purchase. Chris Conant will donate 25% of the proceeds to the LIA. (Order form is below.)

Corrinna Panapay, District Manager, Winooski Natural Resources Conservation District, will discuss the shore erosion projects taking place on Lake Iroquois and grant opportunities or lake residents for projects on their shorelines.

For further information contact:

Jane Marinsky

Hiring Greeter - Lake Iroquois Boat Access

posted Apr 24, 2018, 5:56 PM by Lake Iroquois Association   [ updated Apr 24, 2018, 5:56 PM ]

Are you looking for part-time weekend work this summer?
Are you interested in helping the environment by controlling the spread of invasive plants and animals in Vermont's waterways?
Do you have good people skills and the ability to perform moderate physical tasks?

If so, you may be a good candidate for a Greeter position at the Lake Iroquois Boat Access! Greeters at the Lake Iroquois Boat Access will perform inspections on crafts such as boats, canoes and kayaks both entering and exiting the lake, as well as provide educational information to the public about the prevention of invasive plants and animals. Greeters will also use a high-pressure gasoline-powered washer on crafts both entering and exiting the lake to remove any invasive species. Great job for a Retiree looking for outdoor summer work, or a college student with an interest in aquatic biology and aquatic science, or anyone passionate about protecting Vermont's waterways.
  • Pay is $15.00 an hour.
  • The program will run weekends (Friday evening – Sunday) from May 25 through Labor Day.
  • Greeters will be trained by reps from the VT Department of Environmental Conservation on boat inspections and boat washing; this training will be in May prior to the season opening.
If interested please email me your resume and a cover letter to:

2017 Aquatic Plant Survey- Just Released!

posted Feb 22, 2018, 5:24 PM by Lake Iroquois Association   [ updated Feb 22, 2018, 5:28 PM ]

In 2017 LIA requested a plant survey be conducted of Lake Iroquois and Sunset Pond.  
The report was completed by Darrin Fresh Water Institute

Fall 2017 Newsletter Posted

posted Oct 12, 2017, 5:42 PM by Lake Iroquois Association

Lake Iroquois Stream Remediation and Erosion Control Project

posted Aug 31, 2017, 6:16 PM by Lake Iroquois Association   [ updated Aug 31, 2017, 6:33 PM ]

The overall aim of this project is to achieve velocity dissipation, reduce erosion, and decrease sediment carried into the lake by the stream paralleling Pine Shore Drive. In addition, the project seeks to restore a more natural stream bed to reduce channelization and scouring. The project will be undertaken in two parts:
  • Reshape and line the ditches paralleling Pine Shore Drive and create proper turnouts and road crowning to reduce runoff
  • Stream remediation by restoring the natural streambed and flood plain 
The stream remediation and flood plain restoration work was completed on August 17, 2017 and is described in this report.

Open the PDF below to view the presentation and for additional details about the project. 

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