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Oswegatchie River Water Chestnut Removal Effort

June 25, 2022 @ 9:00 am - 2:00 pm

Saturday, June 25th, 2022

9am-2pm EST

Oswegatchie River

EVENT Press Release/Flyer



Water chestnut is an invasive aquatic species that grows dense floating mats that impede outdoor recreation and reduce shoreline property values. There is an infestation of water chestnuts on the Oswegatchie River near the Village of Heuvelton. Water chestnut is an invasive aquatic plant that forms large mats that shade out native aquatic vegetation and has the ability to completely dominate surface waters. It reduces oxygen levels for fish and encourages sedimentation by restricting silt movement. The hard, pointy seeds of water chestnut can puncture vehicle tires or injure feet if stepped on. If not managed, the infestation of water chestnuts on the Oswegatchie River can grow
and easily spread to connecting waterbodies, like Black Lake.

On Saturday, June 25th, 2022, there will be a removal effort including manual hand-pulls along with the use of mechanical harvesters. Food will be provided by the Village of Heuveloton Fire Department. This is a great opportunity for community members to spend some time on the water, and help protect the Oswegatchie River.

 Anyone who plans to volunteer or contribute services or equipment to this effort needs to fill out the REGISTRATION FORM (Please register by June 21st to allow enough time to receive and return a liability waiver).


Below are descriptions of the three “tracks” for this event in which volunteers are needed, click the registration link above to select your track.

  • Track 1-Village of Heuvelton boat launch to the Eel Weir State Park, approximately 4 hours.
  • Track 2- First session hand-pull in conjunction with mechanical harvesters above the dam east of the Village of
    Heuvelton where Libson Creek drains into the Oswegatchie River. Approximately 2 hours.
  • Track 3- Second session hand-pull in conjunction with mechanical harvesters above the dam east of the Village
    of Heuvelton where Libson Creek drains into the Oswegatchie River. Approximately 2 hours.

This effort is being supported by SLELO PRISM, The Black Lake Association, NYS Office of Parks Recreation and Historic Preservation, NYS DEC, Indian River Lakes Conservancy, Save The River, Thousand Island Land Trust, the Cornell Cooperative Extension of St. Lawrence County, the Village of Heuvelton Fire Department, the City of Ogdensburg Fire & Rescue, the town of Morristown, the Chippewa Bay Fish and Game Club, Chippewa Yacht Club, Black Lake Fish & Game Association, St. Lawrence Waterfowlers, St. Lawrence Valley Sportsman Club, St. Lawrence Sportsmens Federation, St. Lawrence Federal Credit Union, Comprehensive Weed Control of Northern New York, and many volunteers.

The organizations below are aiding the coordination of this event:





June 25, 2022
9:00 am - 2:00 pm

Contact megan.pistolese@tnc.org to list your events on our events page and on Facebook.  

SLELO PRISM Partner Meeting Schedule: Our partners have decided to meet on a seasonal/quarterly basis. We will meet the third week of these months:  January, April, July, and October alternating between  Wednesdays and Thursdays, starting at 10 am.

If you are a Partner and want to receive partner meeting invitations and announcements please follow this link. 

If you are not a Partner and have an interest in attending a Partner Meeting as a guest, please contact Rob Williams, the PRISM Manager at rwilliams@tnc.org.

Save the Date for 2022 Partner Meetings:

Wednesday, January 19th @ 10 am

Thursday, April 21st @ 10 am

Wednesday, July 20th @ 10 am

Thursday, October 20th beginning at 10 am at the NYS DEC Lowville Sub-office located at 7327 NY-812, Lowville, NY 13367

The PRISM Network hosts a monthly Speaker Series on the last Wednesday of each month (except, July, August, and December).

View the Webinar Schedule & Access Recordings

iMapInvasives holds training webinars after the PRISM  Speaker Series from 1 pm-2 pm. Visit the iMap website for details and to register. 

 View Events Pages of the PRISM Network


Capital Mohawk PRISM 

Catskill (CRISP) PRISM 

Finger Lakes PRISM

LIISMA (Long Island) PRISM  

Lower Hudson PRISM

Western NY PRISM