Since 2007, the Skaneateles Lake Association (SLA) has been at the forefront in battling the spread of Eurasian Watermilfoil (milfoil) in Skaneateles Lake.

Milfoil is a non-native invasive species that forms thick mats in shallow areas of a lake, quickly growing and spreading, killing off native aquatic plants that fish and other underwater species rely on for food and shelter.

“We are noticing more research showing how milfoil threatens the diversity and abundance of native plants as well as the ecological balance of lakes,” said SLA Executive Director Frank Moses. “We’re also finding that it can adversely affect recreational opportunities and property values, adding to the need for a successful program.”

The Skaneateles Lake Association established the Milfoil Control program that has reduced the species’ coverage on Skaneateles Lake to a level now requiring “maintenance” control.

The program consists of a lake survey each fall to locate and document large growth patches of milfoil, and then the following spring, Aquatic Invasives, Inc., is hired to “cover” those patches with breathable mats constructed from geotextile material.

SLA’s Dr. Robert Werner Research and Education Boat (“The Bob”) surveys the lake waters using sonar and visual verification to locate milfoil growth. Large growth patches are then mapped and analyzed.

“The matting sites for the following year are prioritized by area size with highest ranking going to the largest patches with density of 70% or more,” said Dr. Bill Dean, SLA board member and research boat designer. “Other factors such as lake depth, slope and stability of lake bottom and boat launch activity help determine matting locations as well.”

Between May 15 and Oct. 18, 2023, over 322 mats (sized ~12’ by 60’) were placed in Skaneateles Lake making up close to 6 acres of coverage.

The 2023 Milfoil Control Program Report can be read online at skaneateleslake.org/covered.

SLA’s overall commitment in preventing and addressing invasive species through milfoil control, the Boat Launch Steward Program, and hemlock tree protection represents more than a $300,000 annual investment for Skaneateles Lake and its watershed.

This work could not be possible without donations from SLA members, the SLA Legacy Fund, public funding, and other donations.

Protecting Skaneateles Lake depends on watershed-wide collaboration and a personal commitment from everyone who loves the lake.

Visit skaneateleslake.org for more information on all of their lake protection programs.