Announcements

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. 

Public Meeting - Milfoil Control with Herbicide

posted Apr 12, 2017, 5:44 PM by Lake Iroquois Association   [ updated Apr 12, 2017, 5:53 PM ]

Vermont Agency of Natural Resources

Aquatic Nuisance Control Public Informational Meeting Notice

The towns of Hinesburg and Williston have requested the Department of Environmental Conservation hold a public information meeting on the draft decision for Aquatic Nuisance Control draft permit 2240-ANC, which pertains to the proposed use of an aquatic herbicide, Sonar AS, in Lake Iroquois.

The public information meeting will be held at the Hinesburg Town Hall:

10632 VT-116, Hinesburg, VT 05461

Thursday May 4, 2017

6 PM – 8 PM

Written comments may be submitted to ANR.WSMDShoreland@vermont.gov. Comments received by the Department of Environmental Conservation during the public notice period, which expires on 4/21, or at the public information meeting shall be taken into consideration in the decision, which will be formalized in a Response Summary that shall be issued with the decision.

Background:

The mission of the Lake Iroquois Association (LIA) is to maintain and enhance water quality and a healthy ecosystem in Lake Iroquois. LIA has been working for many years to control and prevent the spread of Aquatic Invasive Species (AIS) into the lake. However, even with all of these efforts, which are ongoing, the infestation of Eurasian Water Milfoil (EWM) has spread to the point that it has severely impacted the use of the lake, squeezed out many native species, and has in some areas become so dense and matted that it has caused algae blooms on the lake surface. With no natural limitations, this serious infestation could continue to spread and destroy large portions of the lake ecosystem. After discussions with many lake associations around the state, state Department of Environmental Conservation officials, and other experts, the LIA decided to pursue a lake-wide use of herbicides. The LIA in partnership with the Town of Williston applied for a state permit to use Sonar A.S.  (active ingredient fluridone). Eurasian Water Milfoil is a broadleaf plant and is sensitive at very low concentrations of 5-8 Parts Per Billion, well below the drinking water levels set by the US EPA (150 PPB) and the State of New York (50 PPB). Sonar has been widely used in Vermont and around the country and it has been tested and studied for many years. 

For more information please visit: www.lakeiroquois.org  

What is Eurasian Water Milfoil(EWM) and why is it a problem now?

      EWM is an invasive aquatic plant. It is spread by fragmentation. EWM forms thick mats that prevent swimming, paddling, sailing, fishing and motor boating.

      If uncontrolled the problem could worsen and existing infested areas could increase in density.

      Milfoil has become the dominant aquatic plant in the lake, creating a monoculture of EWM in some areas, causing the native aquatic plant species to disappear (1984 45 species, 2012 35 species, 2014 33 species)

Why use an herbicide and is it safe?

      Using the herbicide Sonar is the most cost effective technique that will least disrupt the lake ecosystem, allowing for control of this lake-wide infestation.

      Diver Assisted Suction Harvesting is very expensive, removes native plants and disrupts the lake bottom.

      Benthic barriers are very expensive, block all plants from growing and need to be removed annually.

      Weevils were tried but couldn’t be procured in sufficient numbers to be effective.

      Sonar is safe, it will be used in concentrations(5-8 Parts Per Billion) below the drinking water levels set by the US EPA(150 PPB) and State of New York(50 PPB).

      The application will be done by a professional application company and will be monitored independently.

      Sonar breaks down in the environment and doesn’t accumulate in plants or animals.

Will this one treatment remove all Eurasian Water Milfoil from the lake?

      Unfortunately, once EWM is in a water body, it is almost impossible to completely eradicate it. The goal of this program is to control EWM in the lake, so it isn’t a nuisance.

      In subsequent years, Benthic Barriers will be installed at the fishing access to maintain a clear channel and prevent fragmentation and spread by boats entering and leaving the lake.

      Regular surveys of the lake will be done to monitor the situation and track any recurrences.

      Another herbicide treatment may be needed in 4-5 years but will depend on recurrence and effectiveness of lake monitoring and mechanical removal before it spreads.

Pat Suozzi                                Jamie Carroll                                                     Chris Conant

LIA President                           LIA Director & Milfoil Chair                 LIA Secretary and Fundraising Chair

 

Lake Iroquois Association

PO Box 569 Hinesburg, VT 05461

lakeiroquoisassociation@gmail.com

 

 

 

Preparing for Spring- Benthic Mats

posted Nov 30, 2016, 5:05 PM by Lake Iroquois Association   [ updated Nov 30, 2016, 5:08 PM ]

This past season, if you used the public access ramp you might have noticed the thick bed of milfoil around the access point.  To help keep the area clear, the Lake Iroquois Association has applied for permits to place Benthic mats at the fishing access for next season.  These mats cover the lake floor and prohibit the growth of milfoil in that area.  
We will keep you posted on the progress!

Wondering how you can help LIA keep the lake healthy and vibrant for recreational use? 

Fall 2016 Newsletter Just Posted

posted Nov 30, 2016, 4:51 PM by Lake Iroquois Association   [ updated Nov 30, 2016, 4:55 PM ]

LAKE IROUQOIS ASSOCIATION ANNOUNCES MILFOIL REMOVAL ON LAKE IROQUOIS

posted Aug 11, 2016, 6:42 PM by Lake Iroquois Association   [ updated Aug 11, 2016, 6:48 PM ]

The boat is in and the milfoil is coming out!

On Monday, August 8, AB Aquatics, the company the Lake Iroquois Association (LIA) has contracted to do this work, began Diver-Assisted Suction Harvesting (DASH) of milfoil on Lake Iroquois.  They are working to clear the channel at the fishing access so that boats entering the lake will not break up the milfoil thereby spreading it further into the lake.  AB Aquatics will be working on the lake for at least two weeks.

If you are out on the lake, wave to the crew but please keep your distance.  The crew asks that you not try to talk with them while they are working.  They can't really hear you very well and for safety reasons they need to stay focused on the work.  Remember also that there is a diver submerged working near the boat so make sure to maintain a 200 foot distance.   However, if you would like to talk with the crew they expect to be unloading at the fishing access around 2:30 or 3 in the afternoon. 

This method will not completely solve the milfoil problem.  Rather it is a part of a many pronged effort to reduce and manage this invasive.  Among the other activities aimed at enhancing and maintaining the health of Lake Iroquois are our Greeter Program in which boats entering and leaving the lake are checked for invasives and cleaned, if necessary; projects to reduce nutrients entering the lake (which feeds the growth of milfoil) by mitigating nutrient-laden runoff;  education of lakeshore property owners and lake users in best management practices; creation of no-mow zones and riparian buffers to prevent nutrient runoff into the lake; and  monitoring and stream remediation to reduce sediment and nutrients carried into the lake via its tributaries.  Most of all, your help and support  (financial and/or volunteering time)  will make a difference in protecting and enhancing this wonderful resource.  

For more information, like us on Facebook,  or email us at lakeiroquoisassociation@gmail.com 

What is Diver-Assisted Suction Harvesting?

Diver-Assisted Suction Harvesting (DASH) is an effective method of removal of invasives.  A diver physically hand pulls the targeted plant, being careful to remove the entire root system and to minimize fragmentation (milfoil fragments can easily root and spread throughout a waterbody).  They then place the plant into a suction hose that takes the plant to the surface. Once at the surface the plant is discharged into a straining basket (sort of like a colander) set into the deck so that sediment and water flows through and the milfoil is captured. One crew member on the boat then puts the plants into bags while the second crew member on the boat maps the area being cleared with an Ipad and maintains voice communication with the submerged diver.  At the end of the day the bags with the plants are emptied away from the lake where the material can be composted.


DASH boat, milfoil being removed on Lake Iroquois.

AB Aquatics CEO, Bob Patterson, (left) and the DASH boat crew at Lake Iroquois.








New Facebook Page for LIA

posted Aug 11, 2016, 6:21 PM by Lake Iroquois Association   [ updated Aug 11, 2016, 6:23 PM ]

https://www.facebook.com/lakeiroquois/
LIA now has a Facebook page.  Stay up-to-date with news about the lake, recent photos and progress on water quality.  

Loons on Lake Iroquois

posted Jul 23, 2016, 1:38 PM by Lake Iroquois Association

We are happy to let everyone know that a nesting pair of loons is on Lake Iroquois for

the first time in recent history. This may be the only nesting pair of loons in Chittenden

County. Unfortunately, this pair attempted to nest on the island and did not succeed,

possibly due to disturbance by human and dog activity there. However, once they were

found to be attempting to nest there Andrew and Betsy (the island owners) became

excited and are anxious to work with Eric Hanson, biologist for the Vermont Loon

Conservation Project, to manage the area in hopes that the loons will successfully nest

there next summer. In the meantime, enjoy watching the loons gliding around the lake

but don’t approach them too closely. For more information on loons in Vermont and the

Welcome New 2016 Greeters!

posted Jul 2, 2016, 8:30 AM by Lake Iroquois Association

We have four new greeters staffing the Public Fishing Access this year. They are on duty every weekend Memorial Day to Labor Day. Greeters are funded by an Aquatic Nuisance Control grant received by LIA from the VT Department of Environmental Conservation. Please stop by and say hello. 

Summer 2016 Newsletter Just Posted

posted Dec 9, 2015, 6:47 PM by Lake Iroquois Association   [ updated Jul 2, 2016, 8:33 AM ]

1-10 of 16