MN DNR hydraulic jets weed shore line removal
The Minnesota Department of Natural Resources frequently receives questions about devices that generate water current to blast muck and aquatic plants away. They have various trade names, but the DNR refers to these devices generically as hydraulic jets. Even though they can be purchased in Minnesota, they cannot be used in any way that disturbs the bottom of a waterbody or uproots plants.
A person may legally operate a hydraulic jet if it is placed at the surface of the water in such a way that it does not disturb the bottom or destroy rooted aquatic plants. It should be directed slightly upward toward the water’s surface. This can prevent dead vegetation and duckweed from collecting around docks and boat lifts.
“We want people to know why it’s important to protect aquatic plants,” said Shane McBride, DNR aquatic plant management consultant. “Plants are important to lakes and rivers because they help maintain water clarity, prevent erosion, stabilize the bottom of the waterbody, and provide habitat for fish and wildlife. Aquatic plants are protected under state law.”
Specific regulations govern aquatic plant removal and prescribe the situations that require permits from the DNR. Regulations and a guide to aquatic plants can be found on the Minnesota DNR website (mndnr.gov/shorelandmgmt/apg/regulations.html). To apply for an aquatic plant management permit, visit the Minnesota DNR’s permitting and reporting system (mndnr.gov/mpars).
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