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Aquatic Plants

Curly-leaf pondweed (below) is an invasive species that occurs in Norway Lake.  The control of curly-leaf and other nuisance weeds is one of the associations primary goals.


Managing aquatic plants or “weeds”, (depending on the eye of the beholder) is undoubtedly the number one concern for many looking to enjoy time on or near the waters of the Norway Lake system.  To better understand the role the NLA and individual property owners can play in managing aquatic plants, consider the distinction between near-shore areas and common waters.

Near-shore (within 150 feet of shore)

Individual property owners may remove submerged weeds from portions of the near-shore area either by approved chemical treatment or mechanical harvesting, including hand pulling. Chemical treatment always requires a permit from the DNR. Permits for mechanical harvesting are only required if the removal area is greater than 2,500 ft² – 25′ x 100′, 50 x 50′, etc.  When permits are not required, the area to be cleared must not extend more than 50 feet along the shoreline or one-half the length of your shoreline, whichever is less.

Common Waters (greater than 150 feet from shore)

Permits to mechanically harvest plants in common water are typically issued to organizations such as lake assocations.  Permits to chemically control plants in common water are not issued except, perhaps, under special circumstances and in experimental operations.

The distinction between near-shore and common waters means that the NLA can not mechanically harvest weeds adjacent to individual properties except by contract.  Any such work is done at the property owners expense and areas greater than 2,500 square feet require a permit. 

DNR plant management permit application:

Vegetation in Norway Lake: