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01. July 2023 · Comments Off on It’s Time Again to Remove Invasive Water Chestnuts · Categories: AIS, Aquatic Invasive Species, General Information · Tags: , , ,
While our EcoHarvester is doing a great job attacking the dense areas of water chestnuts at the north end of the lake (per our DEC permit), it cannot grab the multitude of smaller patches and single plants growing along the shorelines all around the lake. Therefore, WE NEED YOUR HELP.

If you have a canoe, kayak, paddleboard, or small fishing boat that can access shallow areas, or whether you live on or off the lake, please cruise around the shorelines and grab as many water chestnut plants as possible. It’s quite easy to spot the leaves on the surface of the water (see photo). 
waterchestnut closeup.jpg
Reach down as far as you can and try to pull the plants with the roots; no problem if the stem breaks. Bring gloves and trash bags to collect the plants. You can let the pulled plants dry on your lawn and either burn them, toss them in the trash, or use them as mulch in your garden. If you do this by mid-July, you will have likely removed the plants before the barbed seed nutlets form. Removal will help prevent propagation of new invasive water chestnuts. Each single plant removed can prevent hundreds of new water chestnut plants from growing in the future.
This link ( may be of interest if you want to know more about invasive water chestnuts. Thank you for helping to battle aquatic invasive species in Kinderhook Lake.
The Weed Management Committee
Kinderhook Lake Corporation
10. March 2023 · Comments Off on ProcellaCor Spot Treatment Coming This Summer · Categories: AIS, Aquatic Invasive Species · Tags: , , , , , ,

The KLC has submitted a permit application to the NYS Department of Environmental Conservation (DEC) to treat up to five acres of Eurasian milfoil with ProcellaCor in June 2023. This is the same herbicide that was used to treat and eradicate over 200 acres of milfoil in 2021. This is a preventative measure to eradicate a few small patches of milfoil identified last summer before they spread and turn into larger weed beds that could interfere with boating and other recreational activities. The cost of the treatment will be covered by your donations to the Weed Management Fund. As required by DEC, ProcellaCor product labels must be posted on our website; see the sidebar Quick Links. Additional information about this summer’s treatment will be posted here later in the spring.

17. November 2022 · Comments Off on Please, DO NOT DO THIS · Categories: AIS, Water quality · Tags: , ,

It is a fact that decomposing leaves produce phosphorus and nitrogen (as well as other minerals). It is a fact that phosphorous and nitrogen are major contributors to excessive aquatic weed growth. Google it! Please, DO NOT DO THIS. 


11. July 2021 · Comments Off on Water Chestnut Harvesting · Categories: AIS · Tags: , , , , ,

Due to this year’s ProcellaCor treatment that appears to have eradicated most of the Eurasian milfoil in the lake, the EcoHarvester was only used to harvest water chestnuts. Since most of the water chestnuts reside in shallower water at the north end of the lake, the harvester was easily able to pull them out with their roots well before the nutlets had a chance to grow. About 1 acre of water chestnuts was harvested on July 7th in accordance with our DEC permit.

20. June 2021 · Comments Off on ProcellaCor Herbicide Treatment – June 22, 2021 · Categories: AIS, General Information, Water treatment · Tags: , ,


Kinderhook Lake will be treated with ProcellaCor,
an aquatic herbicide used for the control of Eurasian milfoil

Tuesday, June 22, 2021

is permitted on the day of the treatment

is permitted until herbicide concentrations 
are tested below 1ppb,
expected approximately 7 days after the treatment

Treatment notifications will be posted 24 hours prior to the treatment date
and removed when concentration levels are acceptable for irrigation,
expected approximately 7 days following the treatment date

Note: ProcellaCor will be applied by an airboat with weighted sub-surface drag-lines

02. June 2021 · Comments Off on ProcellaCor Update 1 · Categories: AIS, Update · Tags: , ,

As we move into June, we can see that the Eurasian milfoil is flourishing all around the lake. This is actually a good thing because ProcellaCor is most effective when milfoil is in full growth mode; it will allow the plants to better absorb the herbicide all the way down to the roots. Our DEC permit application has already been approved and, weather permitting, we hope to be treating the milfoil with ProcellaCor during the third week of June. For those of you not aware of what we are up to, please see our 14 January 2021 post below.

During a pre-treatment weed survey of the lake in early May, an additional 46 acres of milfoil were identified by Burden Aquatics, expanding the milfoil beds from 160 acres to over 200 acres. DEC has already amended our permit to include the additional acreage as it is critical that we address this issue now before it gets even worse.

Although ProcellaCor is absorbed by the milfoil within the first 3-6 hours after treatment, it will take weeks to see evidence of the results. Here is what you can expect to see.

  • One week after treatment, the plants should still be standing but may look sad and begin to wilt.
  • At the end of week 2, half the plants may still be standing but will have turned brown and brittle.
  • By the end of week 3, most of the plants (but not all) will have fallen to the bottom of the lake.
  • By the end of week 4, it will be difficult to detect any evidence of the plants. 

A couple of things to be aware of, (1) milfoil that has not germinated at the time of the ProcellaCor treatment will not be affected and growth may begin later in the summer, and (2) milfoil fragments, whether floating or within the water column, will likely not be affected by the ProcellaCor treatment and may start new growth later in the season or next year. If you see weeds floating around your dock or shoreline, please try to remove them from the lake to reduce the potential of them starting new plant growth.

The treatment date will be posted on the KLC Facebook page as well as on our website as soon as it is confirmed. As required by DEC, signage will be posted around the lake 24-hours before the treatment date. As a reminder, there will be an irrigation restriction for up to 5-days after the treatment and a swimming restriction on the day of the treatment.

Although there are no other legal restrictions, we ask that all boats stay off the lake the day of the treatment. Boating activity will cause additional water movement that may disperse and dilute the herbicide and potentially make it less effective.

We are proud to say that our members have been very generous this year and we have almost reached our goal to raise the $70,000 needed to treat the original 160 acres. However, treating the extra 46 acres identified this spring will cost an additional $20,000, so we are raising our fundraising goal to $90,000. We ask those of you who have not yet donated to the ProcellaCor Fund to please consider doing so now. We also ask those of you who have already donated to please consider an additional donation to help offset the cost of treating the additional acreage. For donation information, please click the link at the top of this page or in the right-hand column.

Remember, based on the reported experience at other lakes, this ProcellaCor treatment should be effective for up to three years. While the lake will never be 100% weed-free, we can look forward to many years of boating and recreational activities not hampered by enormously thick beds of milfoil.

14. January 2021 · Comments Off on It’s Time to Expand Our Weed Management Program · Categories: AIS, Donation Appeal

As most lake users are aware, 2020 was a rough year for management of aquatic invasive species (weeds) on Kinderhook Lake. Dense beds of Eurasian Watermilfoil prevented boating and other recreational activities from taking place in large areas of the lake. We were not alone, as similar instances of expansive weed growth in 2020 were reported in many other lakes throughout the region.

Back in 2016, close to 75-acres of aquatic invasive species, primarily Eurasian Watermilfoil, were mapped in the lake. That process led to the purchase of the Eco-Harvester in 2017, which has been efficiently removing milfoil each summer in the main boating channels as allowed by our DEC permit. Since then, the invasive weed beds have expanded, almost doubling in size and density by 2020. Contributing factors to the unprecedented increase in weed growth include (1) recent warmer winters not allowing sediment to freeze deep enough to kill or stun weeds in areas exposed by the annual drawdown; (2) unusually good water clarity consistently 6- to 7-feet deep for the last few years, allowing the sun to reach deeper and help spur weed growth; (3) the natural cycle of aquatic plant decay contributing to rich nutrients helping to fuel weed growth; (4) constant fragmentation of weeds from boat propellers traveling through the milfoil beds (milfoil easily propagates by fragmentation); and (5) natural reseeding and root expansion from large milfoil beds left unharvested due to limitations of our DEC harvesting permit.

While the Eco-Harvester removed a record 118 harvester-loads of invasive weeds this past summer (volume equivalent to ~413 cubic yards or ~34 dump truck loads), it could not keep up with the thick and speedy regrowth of milfoil. Evaluation throughout the summer and fall led the KLC Weed Committee to determine that it was time to expand our weed management program to include new options to combat aquatic invasive species in addition to using our Eco-Harvester.

After extensive research, the Weed Committee identified a relatively new aquatic herbicide called ProcellaCor. It has been used in many states for several years with remarkable results but was only approved for use in New York State waterbodies in 2019. Weed Committee members visited two local lakes in Fall 2020 to observe the results of their ProcellaCor treatments. Areas of milfoil treated with ProcellaCor at Crooked Lake in Fall 2019 and Burden Lake in Spring 2020 were completely free of milfoil. Committee members talked with several other lake associations that used ProcellaCor in recent years and the results were equally as impressive—no regrowth of milfoil. Committee members also consulted with the Department of Environmental Conservation (DEC) and several lake management firms licensed to apply ProcellaCor to evaluate the most optimal methods of treatment for Kinderhook Lake.

According to research, ProcellaCor has many important advantages over other widely used herbicides: (1) it is highly effective at extremely low dosages and dissipates quickly after use; (2) it specifically targets Eurasian Watermilfoil and a few other invasive species; (3) it does not harm native vegetation or wildlife; (4) it has minimal water use restrictions (primarily irrigation related); and (5) it reportedly lasts for three years before retreatment may be necessary (other herbicides require annual treatments). ProcellaCor treatments appear to be our best option to provide extended control of milfoil for several years.

Based on recommendations by the Weed Committee, the KLC Board of Directors approved the treatment of all milfoil in the lake with ProcellaCor in 2021 based on available funding. The KLC has since accepted proposals from three lake management firms and selected Burden Aquatics, Inc., a local firm from Averill Park, to prepare and submit DEC permit applications and treat the lake’s milfoil beds with ProcellaCor in June of 2021. The estimated cost to treat up to 160 acres is $70,000. The final cost will be determined by a survey in the spring to verify the exact size of all the milfoil beds.

Once the milfoil is treated with ProcellaCor, other weed species may eventually grow in its place. New growth could be native or invasive. For instance, curly-leaf pondweed already grows within many of the milfoil beds and will not be affected by the ProcellaCor treatments. It is possible that curly-leaf pondweed will thrive once the milfoil is treated. Fortunately, curly-leaf pondweed prefers cooler water and dies back on its own once the lake warms up by early-July and, until then, the Eco-Harvester will keep main boating channels clear as allowed by our DEC harvesting permit.

Recent capital improvements at the dam ($68,000 in 2019-2020) and annual copper sulfate purchases to help control blue-green algae (~$15,000/year) have put a considerable strain on the KLC’s financial reserves. However, this could not have been accomplished without your membership gifts and generous donations.

Your help is now needed to expand our weed management program. The goal is to raise $70,000 to treat up to 160 acres of Eurasian Watermilfoil with ProcellaCor during the summer of 2021. This goal can only be achieved through donations by everyone who loves and uses Kinderhook Lake and wants to see it thrive in the future.

To reach this goal, help save our lake from being overtaken by weeds, and expand our weed management program this coming spring, your support and donations in one of the following seven categories is requested:

Silver $50 – $199 Eagle $750 – $999
Patron $200 – $499 Golden Eagle $1,000 – $1,499
Golden Patron $500 – $749 Diamond $1,500 – $2,499
  Platinum Leader Over $2,500  

Donations can easily be made securely online here on our website or by sending a check to the KLC at PO Box 53, Niverville, NY 12130. Please see this pledge form for other donation options. 

Think about it this way, ProcellaCor treatments are reported to last at least three years. If you donate $750, your one-time Eagle donation would be equivalent to $250/year. Certainly, you would agree that it is worth $250/year to save our lake from the destruction that will be caused by the continued expansion of Eurasian Watermilfoil. And, if you are lucky enough to own property on the lake, you would also agree that it’s worth $250/year to assure your property values continue to rise.

Thank you for your continued support and help to preserve Kinderhook Lake! Together, we can address this issue. 

DONATE to Help Expand the KLC Weed Management Program

09. October 2020 · Comments Off on Year of the Weeds · Categories: AIS

2020 has been a rough year for management of aquatic invasive species on Kinderhook Lake, especially Eurasian milfoil. Nobody can be sure if this is due to recent warmer winters not allowing sediment to freeze deep enough to kill or stun weeds in areas exposed by the drawdown, the unusually good water clarity consistently 6- to 7-feet deep for two years, the constant fragmentation of weeds from boat propellors traveling through the milfoil beds, or perhaps all of these combined. What we can be sure of is that we need to address this issue with new tools in addition to using our Eco-Harvester. While our harvester collected a record amount of milfoil this year, it was unable to keep up with this summer’s explosive weed growth in the areas that harvesting is permitted by our DEC permit.

For the past several months, the KLC weed committee has been hard at work researching new options to enhance our weed management program. Committee members have had numerous discussions with DEC, three lake management firms, and several local lake associations dealing with similar issues. Through this research we have found a relatively new herbicide that specifically targets Eurasian milfoil and has been used in many lakes throughout the country for the past few years. This herbicide does not appear to harm native weeds and comes with far fewer restrictions than any other herbicide in use today. Results of these treatments have been highly successful, showing no milfoil growth the second year after use. Committee members made site visits to two local lakes that have used this herbicide in 2019 and 2020 and personally observed the positive results; in one case, native weeds have already started to emerge where milfoil used to grow.

You will be hearing more over the winter about the upcoming changes to our weed management program as we continue to research and evaluate this new option. In the meantime, if you can’t wait for further updates, feel free to Google “ProcellaCor”.

28. June 2020 · Comments Off on Water Chestnut Hand-Pulling Event is Another Success · Categories: AIS, Events

This past Saturday, June 27th, volunteers once again helped to hand pull invasive water chestnuts. It is a somewhat messy job, but we are so very thankful for the two dozen volunteers who came out to help:

Molly Ashford, Sarah Ashford, Ken Bosen, Patty Bosen, John Bruford, Jennifer Clark, Vaughn Clark, Bill Cleary, Teri Cleary, Ryan Haney, Ron Jensis, Bernie Kelleher, Melonie Langdon, Dan Langer, Robin Langer, Linda Leader, Rosemary Palella, Jeanette Palella, Erik Piecuch, Paul Poux, Lisa Rich, Briggette Roos, Fran Sindlinger, Bridgette Tom. Sorry for any incorrect or misspelled names.

More photos can be found on the GALLERY page.


15. June 2020 · Comments Off on It’s That Time of Year Again – Time to Pull Water Chestnuts · Categories: AIS, Events, Water quality

Volunteers have been hand-pulling water chestnuts at the north end of Kinderhook Lake for years and it has been paying off through a reduction in the weed beds. But we cannot take our foot off the pedal now. To continue to reduce the spread of this aquatic invasive species, this year’s water chestnut hand-pulling event is planned for Saturday, June 27, 9:00 am – 11:00 am. Volunteers are needed.

Please meet at the north end of the lake in your kayak, canoe, rowboat, raft, or any vessel that can navigate very shallow water. Don’t forget heavy gloves and perhaps a rake. A few teams of volunteers may be dispersed to various coves around the lake where new water chestnut growth has been identified. Pulled weeds will be transferred to the ECO-Harvester and brought to shore for disposal. In the event of pouring rain or lightning, the ‘pull’ will take place at the same time on Sunday, June 28. Some light refreshments may be available. Check here or on Facebook for any potential changes.